The chickpea (Cicer arietinum L.), also known as garbanzo bean, is an annual herbaceous legume belonging to the Fabaceae family, subfamily Faboideae, and the Cicereae tribe, cultivated primarily for its edible, protein-rich seeds that form the basis of numerous global cuisines.[1] Native to the Fertile Crescent region of the Middle East, including modern-day Turkey, Syria, and Iran, it is one of the earliest domesticated crops, with archaeological evidence dating its cultivation back approximately 10,000 years.[2] The plant typically grows 20–60 cm tall, featuring pinnate leaves with 10–20 oblong-elliptic leaflets, papilionaceous flowers in shades of white, pink, or purple, and pubescent pods containing one to three angular or spherical seeds that vary by cultivar: desi types (small, colored seeds with thick coats) or kabuli types (larger, beige seeds with thin coats).[1]Chickpeas thrive in semi-arid, cool-season environments with alkaline soils and low rainfall, making them resilient to drought and suitable for rotation with cereals to enhance soil fertility through symbiotic nitrogen fixation with rhizobia bacteria, contributing up to 100 kg of nitrogen per hectare.[3] In 2023, chickpeas were produced in over 50 countries, with Asia accounting for about 84% of production; India leads as the top producer with about 75% of the world's output, followed by Australia, Turkey, Ethiopia, and Myanmar, yielding a total of approximately 16.5 million metric tons at an average of 1.1 tons per hectare.[4] Introduced to new regions like Australia in the late 19th century and commercially grown since 1979, chickpeas serve as a vital crop for food security in developing nations, supporting livelihoods for millions of smallholder farmers.[2]The seeds are a nutrient-dense staple, comprising 60–80% carbohydrates and 17–25% protein on a dry weight basis, alongside 4–6% fat, 7–12% dietary fiber, and essential micronutrients such as iron (4–12 mg/100 g), zinc (2.8–4.1 mg/100 g), magnesium (79–138 mg/100 g), and vitamins including folate and B-complex.[1] This composition positions chickpeas as an affordable, plant-based protein source that aids in managing diabetes through a low glycemic index, promotes gut health via high fiber content, and reduces risks of chronic diseases like cancer and cardiovascular issues when incorporated into diets.[5] Culinary uses span boiling for soups and stews, roasting for snacks, grinding into flour for breads like socca or falafel, and processing into products such as hummus and canned goods, while their role in animal feed and green manure underscores their multifaceted agricultural value.[2]
Taxonomy and Description
Taxonomy
The chickpea, scientifically known as Cicer arietinum L., is classified within the family Fabaceae, subfamily Faboideae, and tribe Cicereae.[6][7] This binomial nomenclature was established by Carl Linnaeus in the first edition of Species Plantarum in 1753, marking the formal taxonomic description of the species.[6]The genus Cicer encompasses approximately 45 species, predominantly distributed across southwestern Asia, with C. arietinum as the sole cultivated member.[8] As a cool-season annual legume, the chickpea occupies a distinct phylogenetic position within the Fabaceae, separate from other major pulses such as lentils (Lens culinaris) and garden peas (Pisum sativum), which belong to the tribe Fabeae.[9][10] This separation highlights its unique evolutionary lineage in the inverted repeat-lacking clade (IRLC) of legumes.[11]
Physical Description
The chickpea (Cicer arietinum) is an annual herbaceous legume with a semi-erect to erect growth habit, featuring a branched stem that supports a compact structure. Plants typically reach heights of 20–60 cm, although some cultivars can grow up to 1 m under favorable conditions.[1][12]The leaves are compound and imparipinnate, arranged alternately along the stem, with 7–17 sessile, oblong to elliptic or ovate leaflets per leaf; each leaflet measures 1–2 cm in length and is light to dark green.[1][12] Flowers are small (1–2 cm long), papilionaceous, and predominantly self-pollinating, borne singly or in pairs within axillary racemes; they exhibit colors ranging from white to pink, blue, or purple.[1][12]Pods develop as inflated, pubescent, oblong structures 2–3 cm long, each containing 1–3 seeds; the seeds are angular or spherical, 0.5–1 cm in diameter, and bear a distinctive ram's head-like shape that inspired the species epithet arietinum, derived from Latin references to a ram (aries).[1][12][13] The root system is taproot-dominant, with a primary taproot penetrating up to 2 m deep and numerous secondary lateral roots concentrated in the top 15–30 cm of soil, enabling efficient water and nutrient uptake that enhances drought tolerance.[1][14]
History and Origin
Etymology
The term "chickpea" derives from the Middle English "chich-pease," a calque of the Old French "pois chiche," where "pois" means "pea" and "chiche" stems from the Latin "cicer," the ancient Roman word for the legume.[15] The Latin "cicer" likely originated from a pre-Indo-European root such as Pelasgian "kickere" or Greek "kikus" (meaning "force" or "strength"), and it was used extensively in Roman literature, including by Pliny the Elder.[13] The specific epithet "arietinum" in the scientific name Cicer arietinum comes from the Latin "aries" (ram), alluding to the seed's resemblance to a ram's head, a descriptor proposed by Carolus Linnaeus in 1753 based on earlier botanical observations.[16]In ancient Greek, the plant was known as "erébinthos" (ἐρέβινθος), a term recorded by Theophrastus in his Historia Plantarum around 300 BCE and possibly referenced earlier in Homer's Iliad as a symbol of vitality.[13] Sanskrit texts from the 1st to 4th centuries CE, such as the Puranas, referred to it as "chennuka," which evolved into "chana" in modern Indo-Aryan languages like Hindi, reflecting its longstanding role in South Asian agriculture.[13] In Arabic, the word "ḥummuṣ" (حمص) directly denotes the chickpea, appearing in medieval texts and deriving from an ancient Semitic root unrelated to the dip named after it.[13]Modern names vary by region, illustrating the crop's global dissemination. "Garbanzo," prevalent in Spanish-speaking areas, entered European languages via Spanish from a possible Basque origin in "garau anztu" (dry seed) or earlier Arabic influences, as noted in 19th-century botanical studies.[17] In Indian English, "gram" refers to the chickpea (especially as Bengal gram), borrowed from the Portuguese "grão" (grain or seed) during colonial trade in the 16th century.[13]Italian "ceci" (plural of "cecio") traces directly to the Latin "cicer," preserving the Roman nomenclature in Mediterranean culinary traditions.[13] These variations underscore how linguistic adaptations mirrored the plant's adoption across cultures.
Domestication and Spread
The chickpea (Cicer arietinum) was domesticated in the Fertile Crescent, specifically in southeastern Turkey and adjoining Syria, around 10,000 years before present (BP), marking it as one of the earliest cultivated legumes.[18] This domestication occurred during the Neolithic period, transitioning from wild harvesting to intentional cultivation by early agricultural communities in the region.[13] The wild progenitor of the chickpea is Cicer reticulatum, a species native to southeastern Anatolia, which shares close genetic affinity with the domesticated form and provided the foundational traits for adaptation to farming.[19]Archaeological evidence supports this timeline, with the earliest remains of domesticated chickpeas discovered at sites such as Jericho in the Pre-Pottery Neolithic B period (approximately 6250 BCE) and Hacilar in Turkey (5450 BCE).[13] Additional findings from Çayönü in Turkey date to between 7500 and 6800 BCE, indicating early cultivation in aceramic Neolithic levels.[20] These remains, often found alongside other founder crops like wheat and barley, highlight chickpeas' role in the foundational Neolithic farming package of the Near East.[21]From its origins, the chickpea spread along ancient trade routes, reaching the Indian subcontinent by around 2000 BCE, as evidenced by remains at Atranjikhera in Uttar Pradesh.[13] In the Mediterranean, it was well-established by the 4th century BCE, as described by Theophrastus in his Historia Plantarum, where he detailed varieties like "erebinthos" and their cultivation practices.[13] Chickpeas became a dietary staple in Roman cuisine, valued by the lower classes for their nutritional content; writers such as Pliny the Elder, Columella, and Dioscorides noted their use in porridges, breads, and as a protein source, often served boiled or roasted in taverns to pair with wine.[13] The crop's dissemination continued into the Ottoman Empire, where it formed a key component of regional diets, featured in stews and pilafs as a hearty, accessible legume for peasants and soldiers across Anatolia and the Levant.[21] European cultivation persisted through the medieval period, documented in Charlemagne's Capitulare de Villis (812 CE), but the chickpea reached the Americas only in the 16th century, introduced by Spanish and Portuguese explorers as part of the Columbian Exchange.[21]
Genome Sequencing
The chickpea (Cicer arietinum) is a diploid species with 2n=16 chromosomes and an estimated genome size of approximately 738 Mb.[22] This moderate-sized genome has been a focus of sequencing efforts to support trait improvement in this important legume crop.The first draft genome sequence was published in 2013 by the International Chickpea Genome Sequencing Consortium (ICGSC), led by the International Crops Research Institute for the Semi-Arid Tropics (ICRISAT), in collaboration with institutions including the University of California-Davis and BGI-Shenzhen.[22] This whole-genome shotgun assembly of the kabuli variety CDC Frontier spanned 532.29 Mb across 7,163 scaffolds, representing about 73.8% of the estimated genome size, with 65.23% anchored to eight pseudomolecules using genetic markers.[22] Annotation identified 28,269 protein-coding genes, providing an initial resource for genetic studies.[22]A high-quality reference genome assembly for the desi type was released in 2015 by the National Institute of Plant Genome Research (NIPGR), with updates including version ASM34727v4 in 2019. This assembly covered more than 94% of the estimated gene space, with a scaffold length of 466.5 Mb and reduced gaps compared to prior drafts (N-content decreased to 8.68%).[23] It predicted 30,257 protein-coding genes, including 2,230 transcription factors and 133 resistance gene analogs, enhancing contiguity by 2.7-fold over the 2013 kabuli assembly.[23]Sequencing efforts have revealed key genetic insights, including the identification of genes associated with drought tolerance and flowering time. For instance, genomic regions harboring drought-responsive alleles were mapped in tolerant genotypes like ICC 4918, and a CONSTANS homolog on chromosome Ca3 was linked to flowering time variation, aiding adaptation to diverse agro-climatic conditions.[22] These findings, derived from the draft assemblies, have informed subsequent studies on quantitative trait loci for terminal drought stress during reproductive stages.[24]The genomic resources have enabled applications in marker-assisted breeding to improve yield and stress resilience. High-density genetic maps and single nucleotide polymorphism markers from resequencing data facilitate selection for traits like Fusarium wilt resistance and pod number, accelerating the development of superior cultivars.[25] Recent updates include a 2024 super-pangenome incorporating de novo assemblies of eight wild Cicer species alongside desi and kabuli references, capturing 24,827 gene families and structural variations to broaden genetic diversity for breeding.[26] In 2025, researchers released a pan-genome specific to 15 Australian chickpea cultivars, enhancing understanding of local genetic diversity and supporting region-specific breeding improvements.[27]
Varieties and Breeding
Major Varieties
Chickpeas are primarily classified into two major types based on seed characteristics, plant morphology, and adaptation: the desi and kabuli varieties, which together account for nearly all global production. These types differ in seed size, color, coat thickness, flower pigmentation, and suitability to environmental conditions. Desi types dominate production, comprising approximately 85% of the global total, while kabuli types make up the remaining 15%.[28]The desi type features small, angular seeds typically weighing 0.2–0.4 g, with dark-colored coats in shades of brown, green, or black that are thicker and rougher in texture. These seeds are associated with pigmented stems, leaves, and pink or purple flowers, contributing to their resilience in harsher growing conditions. Desi chickpeas are predominantly cultivated in South Asia, particularly the Indian subcontinent, where they form the bulk of production due to their adaptation to semi-arid, rainfed environments with limited water availability.[29][28][30]In contrast, the kabuli type has larger, rounded seeds ranging from 0.3–0.5 g, with thin, smooth, beige or cream-colored coats and white flowers on non-pigmented plants. This type commands a premium in markets due to its appearance and is favored in regions with access to irrigation, such as the Middle East, Europe, North America, and parts of Australia, where higher yields are achievable under supplemented water conditions. Kabuli varieties often exhibit greater responsiveness to irrigation, leading to improved seed filling and overall productivity compared to desi types in such systems.[29][31][30][32]Beyond these primary types, minor intermediate varieties exist that blend traits of desi and kabuli, such as partial pigmentation or intermediate seed sizes and shapes; examples include regional landraces with mixed characteristics, though they represent a small fraction of cultivation worldwide. Overall seed size across all chickpea types varies from 0.1 to 0.5 g, influencing market value and processing suitability. Breeding programs have occasionally hybridized desi and kabuli traits to develop varieties with enhanced adaptability, though such efforts focus on targeted improvements rather than creating new major classes.[33]
Breeding and Genetic Improvement
Chickpea breeding has historically relied on conventional methods suited to its self-pollinating nature, including pedigree selection, bulk selection, and single seed descent, focusing on traits such as yield potential and resistance to diseases like Fusarium wilt since the early 20th century.[34] The International Crops Research Institute for the Semi-Arid Tropics (ICRISAT) has played a pivotal role in these efforts, contributing to the development and release of over 100 high-yielding and resilient varieties worldwide through collaborative programs that emphasize selection for drought tolerance and pest resistance.[35] These traditional approaches have enabled steady genetic gains, though progress has been gradual due to the crop's inherent reproductive biology and environmental constraints.[36]Modern breeding techniques have integrated genomic tools to accelerate improvement, with marker-assisted selection (MAS) targeting quantitative trait loci (QTLs) associated with key agronomic traits such as yield components, including pod set, and resistance to diseases like Fusarium wilt and Ascochyta blight.[37] For instance, meta-analyses of QTLs for Fusarium wilt resistance have identified consistent genomic regions across studies, facilitating their deployment in breeding pipelines to enhance varietal durability.[38] Post-2020 advancements in gene editing, particularly CRISPR/Cas9, have enabled precise modifications in chickpea, including multiplex editing of chlorophyll biosynthesis genes and base editing for drought tolerance, with potential applications for bolstering Fusarium resistance through targeted immune response enhancements.[39][40] These methods leverage genomic resources to overcome limitations of conventional breeding, allowing for faster introgression of favorable alleles.[25]Recent developments as of 2025 include the adoption of speed breeding techniques to accelerate generation advancement in recombinant inbred lines, enhancing selection efficiency for stress tolerance traits, and increased use of wild relatives like Cicer reticulatum to broaden the genetic base and introduce novel alleles for yield and abiotic stress resistance. Breeding efforts have also emphasized protein quality improvement, targeting higher digestibility and nutritional profiles to meet evolving market demands for plant-based proteins.[41][42][43]Notable achievements include the release of high-yielding varieties such as Pusa 372 in India during the late 20th century, which became a benchmark for drought-prone regions due to its adaptability and yield stability, and subsequent genomics-assisted derivatives like Pusa Chickpea 10216, which demonstrated an 11.9% yield increase over Pusa 372 under drought conditions.[25]Biofortification efforts have also advanced, with breeding programs identifying QTLs for elevated iron and zinc concentrations in seeds, enabling the development of nutrient-dense varieties to combat micronutrient deficiencies in staple diets.[44]Despite these successes, chickpea breeding faces challenges from its narrow genetic base, stemming from a severe domestication bottleneck that limits trait diversity in cultivated germplasm.[45] To address this, introgression from wild relatives, such as Cicer reticulatum and Cicer echinospermum, has been pursued to incorporate novel alleles for abiotic stress tolerance and yield enhancement, though linkage drag and crossing barriers remain hurdles in these efforts.[46]
Cultivation
Growing Conditions
Chickpeas are a cool-season crop that thrives in temperate to subtropical climates, with optimal daytime temperatures ranging from 15°C to 29°C and nighttime temperatures between 18°C and 24°C for vegetative growth and flowering.[29] The plant is frost-tolerant during early vegetative stages, allowing sowing in cooler conditions, but it is sensitive to prolonged frost below -5°C and high temperatures exceeding 35°C during reproductive phases, which can reduce pod set and yield.[47]Well-drained soils are essential for chickpea cultivation, with preferences for sandy loam or silt loam textures that prevent waterlogging.[47] The crop performs best in neutral to slightly alkaline soils with a pH range of 6.0 to 7.5, though it can tolerate pH up to 8.0 in some varieties.[48] Chickpeas exhibit moderate salinity tolerance, managing electrical conductivity up to 4 dS/m without severe yield loss, but they are highly susceptible to waterlogged conditions that promote root rot.[49]Water requirements for chickpeas typically range from 300 to 500 mm during the growing season, making it well-suited to semi-arid regions with medium rainfall. Approximately 80% of global chickpea production occurs under rainfed systems, relying on stored soil moisture and seasonal precipitation, while irrigated cultivation in drier areas supplements with 2 to 4 inches (50-100 mm) during establishment and pod filling.[50] Excessive moisture late in the season can delay maturity and increase disease risk.In crop rotations, chickpeas benefit from preceding cereal crops like wheat or barley, which reduce weed pressure and improve soil structure for the legume's deep taproot.[47] As a nitrogen-fixing legume, chickpeas form symbiotic associations with Rhizobiumbacteria in root nodules, contributing 50-150 kg/ha of fixed nitrogen to the soil, enhancing fertility for subsequent non-legume crops in rotations spaced every 3-5 years to manage diseases.[47]
Global Production
Global chickpea production reached approximately 16.5 million tonnes in 2023, reflecting steady growth driven by increasing demand for plant-based proteins and food security needs in developing regions.[51] For the 2023/24 marketing year, production declined by about 1 million tonnes to around 15.6 million tonnes, primarily due to a smaller crop in India.[52] In 2024/25, estimates suggest a recovery to 16-17 million tonnes, with growth in Australia and sub-Saharan Africa.[53] This output was cultivated across about 14.8 million hectares worldwide as of 2022, with average yields around 1.1 tonnes per hectare globally due to constraints like water scarcity and soil variability.[54]India dominates production, accounting for about 74% of the global total with 12.27 million tonnes in 2023, primarily from rainfed systems in states like Madhya Pradesh and Rajasthan, where yields average around 1.0-1.3 tonnes per hectare.[51][55]Australia ranks second with 0.935 million tonnes, benefiting from higher yields of approximately 2 tonnes per hectare in irrigated and mechanized farming in regions like New South Wales.[51] Other key producers include Ethiopia (0.58 million tonnes), Turkey (0.5 million tonnes), and Myanmar (0.46 million tonnes), contributing to diversified supply chains.[51]Production trends indicate expansion in sub-Saharan Africa, where countries like Ethiopia and Tanzania are increasing cultivated area through improved varieties and extension programs, potentially adding 1-2 million tonnes by 2030 to meet local nutrition demands.[56] However, climate change poses challenges, with rising temperatures and erratic rainfall projected to reduce yields by 10-20% in vulnerable regions like South Asia and parts of Africa by mid-century without adaptation measures.[57][58] Overall, global output is forecasted to grow to around 18-20 million tonnes by 2030, supported by yield-enhancing technologies and market expansion, though at a moderated annual rate of 2-3%.In international trade, Australia emerges as the leading exporter, shipping over 700,000 tonnes annually to meet global shortfalls, particularly from its desi varieties suited for processing.[59] Major importers include Pakistan and Bangladesh, which rely on imports exceeding 500,000 tonnes combined each year to supplement domestic production for consumption and feed uses.[60][61] This trade dynamic underscores chickpeas' role in food security, with exports valued at over $1 billion in 2023.[59]
Nutrient and Heat Management
Chickpeas, as a legume, primarily meet their nitrogen requirements through symbiotic nitrogen fixation with rhizobia bacteria, which can supply 50% to 80% of the plant's needs under favorable conditions, typically reducing the need for external nitrogen inputs to 20-40 kg/ha as starter fertilizer.[62][63]Phosphorus is essential for root development and overall growth, with recommended applications of 40-60 kg/ha to enhance nodulation and yield, particularly in phosphorus-deficient soils.[64][65]Effective fertilization involves balanced NPK applications tailored to soil tests, where phosphorus and potassium significantly improve nutrient uptake and grain yield.[65] Micronutrients such as molybdenum are crucial for nitrogenase activity in nodules, promoting efficient symbiotic fixation, and deficiencies can be addressed through soil or foliar applications of 0.5 kg/ha molybdenum.[66][67] Cobalt may also support nodulation in certain soils, while zinc and manganese foliar sprays address deficiencies to sustain plant health.[66]Heat stress above 30°C during flowering and podding stages severely impacts chickpea productivity by causing flower abortion and reduced pod set, leading to yield losses of up to 30-39%.[57] Selecting heat-tolerant varieties that exhibit delayed flowering helps avoid peak temperature periods, minimizing reproductive damage and maintaining yields in warmer regions.[68][69] Cultural practices like mulching to conserve soil moisture and supplemental irrigation at critical stages—such as flowering and pod filling—can mitigate these effects by cooling the canopy and sustaining water availability, potentially increasing yields by 30% in stressed environments.[70][71]Recent advancements include precision agriculture techniques, such as variable-rate fertilization and sensor-based irrigation, to optimize nutrient delivery and water use under heat stress, improving resource efficiency in chickpea fields.[72]Silicon amendments, applied foliarly at 100-200 mg/L, have shown promise in post-2020 studies for enhancing heat and drought tolerance by bolstering antioxidant defenses and photosynthetic efficiency, thereby reducing yield penalties in susceptible varieties.[73][74]
Uses
Culinary Uses
Chickpeas are widely used in traditional Middle Eastern cuisine, where whole or split chickpeas form the base of dishes such as hummus, a creamy dip made by blending cooked chickpeas with tahini, lemon, and garlic, and falafel, deep-fried patties crafted from ground chickpeas seasoned with herbs and spices.[75][76] In Indian cooking, split chickpeas, known as chana dal, are simmered into hearty lentil-like preparations, while whole chickpeas feature in chana masala, a spiced curry simmered with onions, tomatoes, and garam masala for a robust flavor.[77]Processed forms of chickpeas expand their versatility in global cuisines. Chickpea flour, or besan, is a staple in Indian recipes for pakora, savory fritters where vegetables are coated in a spiced besan batter and deep-fried, as well as in sweets like besan ladoo, where the flour is roasted with ghee and sugar for a nutty confection.[77] Canned chickpeas, popular in modern Western applications, are often drained and tossed into salads with fresh vegetables, herbs, and vinaigrette for quick, protein-rich meals.[78]Beyond these staples, chickpeas appear in diverse regional dishes that highlight their adaptability. In Italy, pasta e ceci combines chickpeas with short pasta, rosemary, and tomatoes in a comforting stew-like preparation.[79] Spanish cuisine features garbanzo stews, such as espinacas con garbanzos, where chickpeas are simmered with spinach, garlic, and smoked paprika for a flavorful tapa.[80] Emerging fermented products, like chickpea tempeh analogs, offer a soy-free alternative to traditional Indonesian tempeh, where chickpeas are inoculated with Rhizopus mold for a firm, probiotic-rich texture suitable for grilling or stir-fries.[81]Preparation methods influence chickpea texture and usability in these dishes. Soaking dried chickpeas overnight in water reduces subsequent cooking time by up to half, from around 90 minutes to 45-60 minutes when boiled.[82] Chickpea varieties also affect outcomes; kabuli types, with their larger size and smoother skin, yield a creamier texture ideal for purees like hummus, while desi varieties provide a firmer bite suited to curries.[83]
Animal Feed
Chickpeas serve as a valuable protein source in animal feed, particularly when seed quality is lower than for human consumption. The seeds contain 19-25% crude protein on a dry matter basis, making them suitable for supplementing diets in poultry, pigs, and ruminants. This high protein level positions chickpeas as a nutrient-dense option, providing essential amino acids and energy comparable to conventional feeds.[84][3]In livestock nutrition, chickpeas are incorporated in various forms, including whole seeds, ground meal, silage, and byproducts such as bran, pod husks, and straw. Whole or milled seeds are commonly added to poultry rations at 5-15% of the diet, depending on growth stage, while ruminant feeds may include up to 25% chickpeas to balance energy and protein needs. Byproducts like husks provide dietary fiber, and straw serves as roughage for grazing animals, enhancing overall feed efficiency in mixed rations.[3]The inclusion of chickpeas in animal diets offers several benefits, including improved milk yield and fat content in dairy cows when substituted for up to 25% of the concentrate, and enhanced average daily weight gain in organically reared bulls compared to barley-based feeds. As a cost-effective alternative to soybean meal, chickpeas reduce reliance on imported proteins while maintaining comparable digestibility and performance in pigs and poultry. However, limitations arise from anti-nutritional factors such as trypsin inhibitors and tannins, which can reduce protein digestibility; these are effectively mitigated through processing methods like heat treatment or extrusion.[3][85][86]
Industrial Applications
Chickpea starch, comprising approximately 40-60% of the seed's dry weight, is extracted through wet milling processes involving soaking, grinding, and separation to isolate it from proteins and fibers. This starch has been utilized in industrial applications such as textilesizing, where it provides a lightweight finish to fabrics like cotton, wool, and silk, enhancing their smoothness and durability during manufacturing.[1]Protein isolates derived from chickpeas serve as a renewable raw material in the production of biodegradable plastics. Studies have demonstrated that chickpea protein isolates, when blended with whole flour, form films with favorable mechanical properties, including tensile strength comparable to soy-based alternatives, though they exhibit higher water absorption rates. These properties make chickpea protein a viable option for eco-friendly packaging and agricultural films, contributing to sustainable material development. Additionally, chickpea proteins have been identified as potential feedstocks for bioplastic production alongside other legumes like pea and lentil, leveraging their thermal stability and film-forming capabilities.[87][88]In the cosmetics industry, chickpea seed oil and extracts are incorporated into formulations for their moisturizing and antioxidant properties. Topical application of chickpea oil has shown efficacy in reducing inflammation and improving skin barrier function, as evidenced in clinical evaluations for conditions like osteoarthritis, where it alleviated pain and stiffness. Chickpea sprout hydrolysates, enriched with selenium, exhibit anti-aging potential by promoting collagen synthesis and inhibiting oxidative stress, positioning them as active ingredients in anti-wrinkle creams and serums. Furthermore, chickpea flour acts as a natural exfoliant and conditioner in soaps and facial masks, providing gentle abrasion and skin-soothing effects due to its saponin content.[89][90][91]Chickpea residues, including hulls and straw, hold promise for biofuel production through processes like thermal pyrolysis and co-pyrolysis. Pyrolysis of chickpea hulls at elevated temperatures yields bio-oil and biochar with high energy content, offering a pathway to convert agricultural waste into renewable fuels and value-added products. In integrated systems, chickpea straw combined with plasticwaste can generate syngas for power and fuel synthesis, achieving up to 40% energy efficiency in zero-emission configurations. These applications address residue management while tapping into the global biofuel market, estimated to benefit from legume byproducts in sub-Saharan Africa and beyond.[92][93][94]Traditionally, chickpea hulls (pods) have been explored as a source of natural dyes for textile coloration, extracting phenolic and tannin compounds through solvent-free methods to produce hues suitable for eco-friendly finishing. These agro-wastes enable functional dyeing with antimicrobial properties, reducing reliance on synthetic colorants in the industry.[95]Emerging industrial processes focus on chickpea protein extraction for plant-based meat analogs, driven by advanced isolation techniques yielding high-purity isolates for texturizing applications.
Nutrition and Processing
Nutritional Composition
Chickpeas, also known as garbanzo beans, are nutrient-dense legumes with a macronutrient profile that includes approximately 378 kcal of energy per 100 g of dry mature seeds, comprising 20.5 g of protein, 63 g of carbohydrates (of which 12.2 g is dietary fiber), and 6 g of total fat.[96] The protein content is predominantly composed of essential amino acids, though it is limiting in sulfur-containing amino acids like methionine, making chickpeas complementary when paired with cereal grains.[97] The carbohydrates are mainly complex polysaccharides, contributing to the food's low glycemic index of 28–36, which indicates a slow impact on blood glucose levels.[98]Key micronutrients in dry chickpeas per 100 g include iron at 4.3 mg (24% of the Daily Value, DV), folate at 557 μg (139% DV), phosphorus at 252 mg (20% DV), manganese at 2.14 mg (93% DV), copper at 0.96 mg (107% DV), and zinc at 2.76 mg (25% DV).[96] These values position chickpeas as a valuable source of B vitamins and minerals essential for energy metabolism and red blood cell formation, though bioavailability of iron may be enhanced by vitamin C co-consumption.[99]Chickpeas are rich in phytochemicals such as polyphenols (including phenolic acids and flavonoids) and saponins, which exhibit antioxidant properties.[100] The desi variety, characterized by smaller, darker seeds, generally contains higher levels of these antioxidants compared to the larger, lighter kabuli type, with desi seeds showing elevated phenolic and flavonoid contents.[101]Compared to most cereals, dry chickpeas offer substantially higher protein (20.5 g per 100 g versus 12–14 g in wheat or 7 g in rice), supporting their role in plant-based diets for improved amino acid balance.[96][102][103] Their low glycemic index further distinguishes them from higher-GI cereals like white rice (GI 73).[104]
Cooking chickpeas through boiling significantly reduces anti-nutritional factors such as phytates, with studies reporting reductions ranging from 20% to 41% depending on soaking duration and boiling time, thereby enhancing mineralbioavailability.[105][106]Boiling also improves protein digestibility, increasing it from approximately 72% in raw chickpeas to 84% in cooked samples, primarily by inactivating heat-sensitive inhibitors like trypsin.[107] However, this method leads to losses of heat-labile vitamins, including thiamine (vitamin B1), with reductions of 10-50% observed due to thermal degradation and leaching into cooking water.[108][109]Germination of chickpeas markedly boosts vitamin C content, with increases up to several-fold reported across cultivars due to enzymatic activation during sprouting, enhancing overall antioxidant capacity.[110] This process also reduces oligosaccharides like raffinose and stachyose, which contribute to flatulence, by 20-50% through microbial and hydrolytic breakdown, improving gastrointestinal tolerability without substantially affecting protein levels.[111][112]Skinning, or dehulling, chickpeas prior to consumption concentrates protein in the cotyledon, raising content by about 20% compared to whole seeds and improving protein digestibility by removing hull-bound tannins that inhibit enzymatic breakdown.[113][114]Roasting further enhances protein bioavailability by denaturing anti-nutritional proteins, achieving digestibility improvements of 10-15% over raw forms, though it may slightly reduce certain heat-sensitive compounds.[115]Microwave cooking shortens processing time to under 10 minutes while preserving more B-vitamins and folates than traditional boiling, with losses limited to 5-15% versus 20-50% in the latter, due to minimal water exposure and shorter heat duration.[116][117]Autoclaving chickpeas effectively eliminates pathogens like Salmonella through high-pressure steam at 121°C, achieving near-complete inactivation with processing times of 15-20 minutes.[118] Nutrient retention is generally superior to open boiling for water-soluble vitamins, with thiamine losses around 20-30% compared to 40-50%, as the sealed environment reduces leaching, though protein denaturation can slightly lower overall digestibility if over-processed.[119][116]
Health Effects and Research
Health Benefits
Chickpeas contribute to cardiovascular health primarily through their high soluble fiber content, which binds to bile acids and cholesterol in the digestive tract, promoting their excretion and thereby lowering low-density lipoprotein (LDL) cholesterol levels. A systematic review and meta-analysis of randomized controlled trials found that dietary pulse intake, including chickpeas, significantly reduces LDLcholesterol by an average of 0.17 mmol/L, corresponding to a 5-10% reduction in cardiovascular risk when incorporated into a balanced diet.[120] This effect is attributed to the fiber's interference with cholesterol reabsorption, as supported by multiple intervention studies.[121]In diabetes management, chickpeas exhibit a low glycemic index (GI) of 28-36, leading to gradual blood sugar release and reduced postprandial glucose spikes. Systematic reviews indicate that incorporating legumes like chickpeas into low-GI diets improves glycemic control in type 2 diabetes, with meta-analyses showing significant reductions in HbA1c levels by approximately 0.5% over 3 months.[122] These benefits stem from the combined action of fiber, protein, and resistant starch, which slow carbohydrate digestion and enhance insulin sensitivity.[123]For weight control, the protein and fiber in chickpeas promote satiety, reducing overall calorie intake. A meta-analysis of randomized trials reported a 31% increase in subjective satiety following pulse consumption, while systematic reviews demonstrate modest weight loss of approximately 0.34 kg with regular intake, alongside lower body mass index (BMI) in cohort studies.[124][121] Observational data further link higher legume consumption to a reduced risk of obesity, with inverse associations to BMI in long-term follow-ups.[125]Chickpeas support gut health via prebiotic fibers that ferment in the colon, fostering beneficial microbiota and producing short-chain fatty acids. Systematic reviews confirm that pulse-derived fibers, including those from chickpeas, positively modulate gut microbiota composition, enhancing diversity and intestinal barrier function.[126] Additionally, the non-heme iron in chickpeas is better absorbed when paired with vitamin C-rich foods, as ascorbic acid reduces ferric iron to its more absorbable ferrous form, mitigating risks of iron deficiency, though anti-nutritional factors like phytates can inhibit absorption if chickpeas are not properly cooked.[127][128][129]Evidence from recent reviews (2021-2023) highlights the anti-inflammatory effects of chickpea isoflavones, such as biochanin A and formononetin, which inhibit pro-inflammatory cytokines and pathways like NF-κB. These compounds contribute to reduced systemic inflammation, potentially lowering risks for chronic diseases, as evidenced in nutrigenomic and in vitro studies on chickpea digests.[99][130]
Ongoing Research
Recent research on chickpea climate resilience emphasizes breeding programs utilizing geneediting technologies like CRISPR-Cas9 to enhance tolerance to drought and heat stress, particularly in vulnerable regions. Studies have identified key genetic variants in chickpea landraces that confer heat tolerance, with ongoing evaluations of genotypes under controlled stress conditions to inform breeding strategies.[131][132]Efforts in chickpea biofortification focus on elevating micronutrient levels, such as zinc, through agronomic and genetic approaches to address nutritional deficiencies in staple diets. Genome editing techniques have been applied to boost zinc content in chickpea seeds, with trials demonstrating increased uptake and yield without compromising agronomic traits in calcareous soils. Recent advancements include foliar zinc applications combined with high-yielding varieties, showing up to 20-30% improvements in seed zinc concentrations.[133][134][135]Investigations into chickpea-derived functional foods highlight the bioactivity of protein hydrolysates and peptides, particularly their potential in managing hypertension. Post-2023 studies have optimized alcalase-based chickpea protein hydrolysates, demonstrating sustained antihypertensive effects in spontaneously hypertensive rat models through ACE inhibition and upregulation of protective genes like ACE2 and Mas1. These hydrolysates, administered orally at low doses, reduced systolic blood pressure by 15-25 mmHg over extended periods, suggesting applications in functional food development.[136][137][138]Sustainability research on chickpeas explores their role in carbon sequestration and integrated pest management (IPM) to promote eco-friendly agriculture. Chickpea-maize rotations have shown potential to sequester 1-2 tons of carbon per hectare annually while enhancing soil health in rainfed systems. Ongoing IPM trials integrate biopesticides and resistant varieties to control pod borers, reducing chemical inputs by 30-50% and maintaining yields in diverse agroecologies.[139][140][141]A key research gap lies in the need for long-term human trials assessing chickpea's impact on the gut microbiome, as current evidence is largely from short-term or animal studies. Ongoing clinical trials are examining eight-week interventions with whole-cooked chickpeas, tracking shifts in microbial diversity and metabolic outcomes, but extended studies beyond six months are required to evaluate sustained effects on gut barrier integrity and overall health.[142][143][144]
Pests and Diseases
Major Pathogens
Chickpeas are susceptible to several major fungal and bacterial pathogens that cause significant diseases, particularly in regions with favorable environmental conditions for infection. These pathogens primarily affect roots, stems, leaves, and pods, leading to reduced plant vigor and yield losses. Key diseases include Fusarium wilt, Ascochyta blight, root rots caused by Rhizoctonia and Pythium species, and bacterial blight, with management relying on integrated approaches such as resistant varieties, crop rotation, and chemical controls.[145]Fusarium wilt, caused by the soil-borne fungus Fusarium oxysporum f. sp. ciceris, is a vascular disease that infects chickpeas through the roots, leading to yellowing of lower leaves, wilting of the plant during the day, and eventual death, often accompanied by brown discoloration in the vascular tissue. This pathogen persists in soil for many years via chlamydospores and spreads through contaminated soil, water, or infected seeds. Symptoms typically appear 3-4 weeks after planting in warm soils (above 25°C), with losses ranging from 10-15% annually but reaching 27-45% in severe epidemics depending on infection timing and environmental factors. Management focuses on planting resistant varieties and practicing long-term crop rotation with non-host crops like cereals to reduce inoculum levels.[145][146][147]Ascochyta blight, incited by the fungus Ascochyta rabiei (teleomorph Didymella rabiei), is a foliar and stem disease prevalent in cool, wet conditions, producing dark brown to black lesions with concentric rings on leaves, stems, and pods, which can girdle stems and cause pod deformation or seed infection. The pathogen overwinters in infected debris and spreads via rain-splashed conidia or ascospores, with infected seeds serving as a primary inoculum source. This disease can devastate crops, causing yield reductions up to 100% in susceptible varieties during favorable epidemics. Effective control involves seed treatment with fungicides, timely applications of protectant fungicides like chlorothalonil during wet periods, crop rotation, and burial of residue to limit survival.[145][148][149]Root rots pose a threat in poorly drained or waterlogged soils, with Rhizoctonia solani causing wirestem and root decay that results in stunted growth, reddish-brown lesions on roots, and plant lodging, while Pythium species (e.g., Pythium ultimum or Globisporangium ultimum) induce damping-off in seedlings and soft rot of roots leading to wilting and collapse. These soil-borne pathogens thrive in saturated conditions and cool temperatures, often forming disease complexes that exacerbate damage. Yield impacts can be substantial, with root rots contributing to losses estimated in millions annually in affected regions. Management strategies include improving soil drainage, using fungicide-treated seeds (e.g., metalaxyl for Pythium), and selecting varieties with partial tolerance, alongside avoiding compacted or flooded fields.[145][150][151]Bacterial blight, caused by Xanthomonas campestris pv. cassiae, is a less common but seed-transmitted disease that manifests as water-soaked spots on leaves turning necrotic with yellow halos, potentially leading to stem cankers and wilting in advanced stages. It spreads via rain or overhead irrigation and is more prevalent in warm, humid environments, though outbreaks are sporadic. Control emphasizes quarantine of infected seeds, rogueing of diseased plants, and use of certified clean seed, with resistant cultivars providing additional protection where available.[145][152]Globally, these pathogens can cause yield losses up to 40% during epidemics, severely impacting chickpea production in major growing areas like South Asia, the Middle East, and Australia. Recent advancements include the 2025 release of resistant cultivars such as Pusa Chickpea 4037 (Aswini), which exhibits resistance to Fusarium wilt and moderate resistance to root rots, supporting breeding efforts for durable protection.[153][154]
Insect Pests and Management
Chickpeas are susceptible to several key insect pests that can significantly impact yield and quality during both field growth and post-harvest storage. The pod borer, Helicoverpa armigera, is one of the most destructive, with its larvae boring into pods and feeding on developing seeds, leading to yield losses ranging from 20% to 50% in severe infestations.[155] This pest is particularly problematic in regions like India, where it causes annual economic losses exceeding $330 million across chickpea production.[156] Management strategies include the use of neem-based formulations, such as 5% neem kernel suspension to deter oviposition, and the deployment of Helicoverpa nuclear polyhedrosis virus (HNPV) at 250 larval equivalents per hectare for targeted control.[156] In addition, transgenic approaches incorporating Bacillus thuringiensis (Bt) genes have shown promise in developing resistant chickpea varieties to reduce reliance on chemical insecticides.Aphids, primarily Aphis craccivora, pose a threat by sucking sap from leaves, stems, and pods, which stunts plant growth and leads to the excretion of honeydew that promotes sooty mold.[157] These pests also act as vectors for viruses such as chickpea stunt disease (bean leafroll virus), exacerbating crop damage.[156] Biological control is a preferred method, utilizing natural predators like ladybird beetles (Coccinellidae) and parasitoids (e.g., Aphidius spp.) to suppress aphid populations effectively.[156] In Australia, integrated approaches combining early sowing and monitoring help mitigate aphid outbreaks, which are more pronounced in cooler, wetter conditions.[158]Post-harvest, bruchid beetles such as Callosobruchus chinensis and C. maculatus infest stored chickpeas, with larvae developing inside seeds and causing up to 20-30% weight loss while reducing seed viability.[159] These pests are especially severe in storage facilities in India, where high temperatures accelerate their reproduction cycles.[160] Effective management involves hermetic storage bags, which create an oxygen-depleted environment to suffocate developing larvae, achieving near-total control over 6-12 months without chemical fumigants.[161] Sun-drying seeds to below 10% moisture prior to storage further prevents infestation.[156]Integrated pest management (IPM) for chickpea insects emphasizes a combination of cultural, biological, and technological practices to minimize losses sustainably. Key components include planting resistant varieties like those with antibiosis against H. armigera, using pheromone and light traps to monitor and disrupt pest mating, and intercropping with cereals to reduce aphid colonization.[162] In the 2020s, drone-based monitoring has emerged as a tool for early detection of pest hotspots in large fields, enabling precise interventions in regions like India and Australia where pest pressures are high.[163] This holistic approach has reduced insecticide applications by up to 50% while maintaining yields.[164]