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Characteristics and Activity Changes of Proteolytic Enzymes in Apple Leaves during Autumnal Senescence


Plant Physiology 70(5): 1367-1372
Characteristics and Activity Changes of Proteolytic Enzymes in Apple Leaves during Autumnal Senescence
At least four different proteinases were present in senescing apple leaves (cv. Golden Delicious) as determined by their pH optima, substrate specificity, and reactivity to proteinase inhibitors. An enzyme active at pH 4.5 to 5.0 appeared to be a sulphhdryl-dependent endoproteinase, and degradation of the large subunit of ribulose bisphosphate carboxylase was observed only with this enzyme.


Accession: 001053143

PMID: 16662681

DOI: 10.1104/pp.70.5.1367



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