Grain Legumes (Soybean, Chickpea, and Peanut): Omics Approaches to Enhance Abiotic Stress Tolerance uri icon

abstract

  • Legumes rank third in world crop production, and abiotic stress is the majorconstraint to crop productivity. Biotechnological applications including all "omics"have been the direct and potential approaches for improving abiotic stress tolerancein grain legumes and requires knowledge of stress response at molecular level, whichincludes gene expression to protein or metabolite and its phenotypic effects.Genome-wide expression profiling studies have been carried out in the legumes toidentify the candidate genes and regulatory networks among abiotic stress responses.Among the grain legumes, although soybean has been more intensively studied,more recently, sensitive and tolerant varieties of chickpea and peanut have beencharacterized under abiotic stress conditions. Nevertheless, proteomic studies inresponse to abiotic stress in legumes are still very limited with only Medicagotruncatula and soybean protein reference maps available. Some of the major QTLcontrolling abiotic stress tolerance in legumes have been mapped for a major QTL forsalt tolerance in soybean and drought tolerance-related traits in peanut. Although,Agrobacterium-mediated gene transfer has been reported in all the major legumecrops, so far only one legume, that is, soybean, has been commercialized. Transgenictechnologies for improved abiotic stress tolerance involving regulatory genes haveproved more efficient than using single or multiple functional genes involved instress tolerance

publication date

  • 2012