Senescence associated proteases: the key players in plant senescence
Senescence is the final stage of the plant development which leads to cell death. This process consists of a highly regulated, ordered series of events involving loss of photosynthetic capability, breakdown of proteins, loss of chlorophyll, disintegration of chloroplasts and export of all solubilised nutrients. The regulation and control of gene expression of senescence is governed by a set of Senescence Associated Genes (SAGs). They encode the enzymes which degrade the biomolecules during the leaf senescence and thus strictly associated with senescence in different plants.