Advances in studying metabolic regulation during senescence of nitrogen-fixing nodule in legumes
Senescence is one of the major factors affecting the efficiency of nitrogen fixation in legume nodules,and in-depth studying the regulatory mechanisms of the senescence of nodule is of great signifi-cance.This article reviewed the progress on studying the senescence of nodule from the aspects including morphological characteristics,physiological and biochemical changes,pathways of senescence,and the reg-ulation of material metabolism.The functions of senescence-related genes in both legume and rhizobia dur-ing the process of symbiotic nitrogen fixation were summarized.It is put forward that developing new meth-ods and technologies of studying can contribute to a more thorough elucidation of the molecular mechanisms underlying the metabolism of key substances in the senescence of nodules.A thorough understanding of the molecular mechanisms of the senescence of nodule can be helpful for the genetic modification of delaying the senescence of nodule,thereby improving the efficiency of nitrogen fixation in leguminous plants and pro-moting the sustainable development of agricultural production.
symbiotic nitrogen fixationthe senescence of noduleenvironmental stresstranscription regulationmaterial metabolism
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