РУАЭСТ (RUAEST)
SYMBIOTIC NODULE SENESCENCE IN LEGUMES: MOLECULAR-GENETIC AND CELLULAR ASPECTS (REVIEW)
Senescence is the natural stage in development of symbiotic nodule. As a result of senescence, reutilization of different nutrients from nodule to the other plant organs occurs. Generally senescence in legumes is triggered after flowering finishing, although the first traits of senescence can be observed very early during nodule development. A delay of the triggering of senescence program will allow to prolong the active nitrogen-fixating period and therefore to increase the amount of symbiotrophic nitrogen in plants and, finally, to elevate legume productivity. That is why no wonder that in the recent years the senescence of nitrogen-fixing nodules is actively studied. In this review the main developmental stages of nitrogen-fixing symbiotic nodule of legumes, particularities of symbiotic nodule development of determinate and indeterminate types are considered.