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Agriculture & Rural India21 Concepts & Facts

What Is a Seed Bank? GK Facts, Agricultural Diversity & Gene Banks

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A seed bank is an ex-situ conservation facility dedicated to preserving the genetic diversity of cultivated crops, wild plant relatives, and endangered flora by storing dried, dormant seeds under strictly controlled low-temperature and low-humidity environmental conditions. In an era characterized by accelerating climate volatility, industrial monoculture, habitat destruction, and the erosion of heirloom landraces, seed banks act as essential botanical vaults. By maintaining viable samples of diverse plant germplasm outside their native environments, seed banks safeguard the foundational genetic material required by plant breeders, agricultural scientists, and farmers to breed resilient, disease-resistant, and high-yielding crop varieties for future generations.

The scientific foundation of seed banking relies on the physiological classification of seeds into orthodox and recalcitrant categories. Orthodox seeds, which encompass major global staple cereals, pulses, and oilseeds such as wheat, rice, maize, and chickpeas, possess the remarkable biological ability to survive extensive desiccation down to three to seven percent moisture content. Once dried, these seeds can be frozen at minus eighteen to minus twenty degrees Celsius without suffering structural damage to their cellular membranes, entering a state of suspended animation in which metabolic activity drops to near-zero levels. In contrast, recalcitrant seeds, such as those of mango, rubber, coconut, and cocoa, perish if dried or frozen; they must be conserved through living field gene banks, in-vitro tissue cultures, or cryogenic freezing in liquid nitrogen at minus one hundred ninety-six degrees Celsius.

Globally, the preservation of plant genetic resources operates across a tiered network of national, regional, and international institutions. At the apex of this global backup architecture is the Svalbard Global Seed Vault, carved deep into the permafrost of a Norwegian Arctic mountain, serving as the ultimate safety duplicate facility for the world's seed collections. In India, ex-situ germplasm conservation is spearheaded by the ICAR-National Bureau of Plant Genetic Resources (NBPGR) at the National Gene Bank in New Delhi, which houses one of the largest seed repositories in the world. This conservation machinery is legally reinforced by international treaties like the FAO International Treaty on Plant Genetic Resources for Food and Agriculture and domestic legislation such as India's Protection of Plant Varieties and Farmers' Rights Act, 2001.

Key Concepts & Self-Assessment21 Key Facts

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#1
A seed bank is an ex-situ conservation repository that preserves the seeds of diverse plant species and agricultural cultivars to safeguard genetic diversity.
#2
Ex-situ conservation refers to the preservation of components of biological diversity outside their natural habitats (as opposed to in-situ conservation in national parks or nature reserves).
#3
Orthodox seeds can survive desiccation to low moisture levels (3%–7%) and freezing temperatures (-18°C to -20°C) without losing viability.
#4
Major global food crops—including rice, wheat, maize, barley, soybean, and most legumes—produce orthodox seeds suitable for long-term frozen storage.
#5
Recalcitrant seeds cannot tolerate desiccation below critical moisture levels (typically 20%–30%) and lose viability if frozen at standard temperatures.
#6
Recalcitrant crops include economically vital tropical species such as mango, coconut, cocoa, avocado, rubber, and jackfruit.
#7
Recalcitrant germplasm is conserved through alternative methods: living field gene banks, in-vitro tissue cultures, or cryogenic storage in liquid nitrogen at -196°C.
#8
Intermediate seeds can tolerate partial drying (around 10%–12% moisture) but are sensitive to standard sub-zero freezing (e.g., coffee and citrus).
#9
The Svalbard Global Seed Vault, opened in February 2008 in the permafrost of Spitsbergen island in Norway, acts as the ultimate global backup facility for crop seeds.
#10
The Svalbard vault maintains an interior temperature of -18°C using natural permafrost supplemented by mechanical cooling, designed to withstand nuclear events and severe climate shifts.
#11
Depositors to Svalbard retain legal ownership of their seed deposits under a "black box" system, meaning only the depositing institution can withdraw or access the seeds.
#12
The first formal withdrawal from the Svalbard Seed Vault occurred in 2015 by ICARDA (International Center for Agricultural Research in the Dry Areas) following the destruction of its gene bank in Aleppo, Syria.
#13
India’s National Gene Bank (NGB), established in 1996 at the ICAR-National Bureau of Plant Genetic Resources (NBPGR) in Pusa, New Delhi, is among the largest in the world.
#14
The National Gene Bank in New Delhi conserves over 4.5 lakh (450,000) germplasm accessions across long-term seed modules (-18°C), cryo-preservation, and in-vitro tissue culture.
#15
India maintains a high-altitude natural seed vault at Chang La, Ladakh, situated at approximately 17,300 feet, managed by the Defence Institute of High Altitude Research (DIHAR, DRDO).
#16
The International Treaty on Plant Genetic Resources for Food and Agriculture (ITPGRFA), known as the International Seed Treaty, was adopted by the FAO in 2001.
#17
The ITPGRFA establishes a multilateral system of access and benefit-sharing for 64 key food crops and forages essential for global food security.
#18
India enacted the Protection of Plant Varieties and Farmers’ Rights (PPV&FR) Act, 2001, which uniquely recognizes farmers as plant breeders with the right to save, use, exchange, and sell farm-saved seeds.
#19
The Millennium Seed Bank Project, operated by the Royal Botanic Gardens at Kew, Wakehurst (UK), is the largest wild plant ex-situ conservation facility, conserving over 40,000 wild species.
#20
Seeds in long-term storage are periodically tested for germination percentage; when germination drops below 85%, accessions are regenerated by growing them in experimental fields.
#21
Genetic erosion—the progressive loss of traditional farmer varieties and landraces due to modern monoculture—is the primary crisis that seed banks are constructed to counteract.

Subject Specialist Commentary

Analytical perspective & practical exam advice from the Master10 academic board

Educator's Insight
A seed bank is an ex-situ conservation facility that preserves seeds of diverse crop varieties, wild relatives, and threatened plants to protect genetic diversity against climate shocks, pests, and natural disasters. Orthodox seeds—including staple crops like rice, wheat, and pulses—can be dried down and frozen safely at sub-zero temperatures for decades. By contrast, recalcitrant seeds like mango, coconut, and rubber cannot withstand freezing and require living field gene banks or cryopreservation.
In UPSC GS-3 and State PSC environment papers, questions frequently test seed storage facilities. Memorize Norway's Svalbard Global Seed Vault, which stores backup seeds in Arctic permafrost under a black box system where depositors retain ownership. For Indian geography, remember the National Gene Bank at ICAR-NBPGR in New Delhi and the high-altitude seed vault at Chang La, Ladakh. Also review the PPV&FR Act, 2001, protecting farmers' seed rights.

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