Plant organ senescence - regulation by manifold pathways.

摘要: Senescence is the final stage of plant ontogeny before death. may occur naturally because age or be induced by various endogenous and exogenous factors. Despite its destructive character, senescence a precisely controlled process that follows well-defined order. It often inseparable from programmed cell death (PCD), correlation between these processes has been confirmed during leaves petals. suggestions PCD are two separate processes, with occurring after senescence, responsible for accompanied numerous changes at cytological, physiological molecular levels, similar to other types PCD. Independent organ analysed, focused on initiating cellular structural degradation via fluctuations in phytohormone levels activation specific genes. Cellular genetically dependent autophagy. Phytohormones/plant regulators heavily involved regulating organs can either promote [ethylene, abscisic acid (ABA), jasmonic (JA), polyamines (PAs)] inhibit [cytokinins (CKs)] this process. Auxins carbohydrates have assigned dual role regulation both stimulate In review, we introduce basic pathways regulate plants identify mechanisms controlling ephemeral organs. Moreover, demonstrate universal nature different organs; despite completely functions, it very similar. Progress area providing opportunities revisit how, when which way coordinated decoupled will provide powerful tool physiology research.