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Altered protein synthesis during in situ oat leaf senescence
Author(s) -
Lalonde Louise,
Dhindsa Rajinder S.
Publication year - 1990
Publication title -
physiologia plantarum
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.351
H-Index - 146
eISSN - 1399-3054
pISSN - 0031-9317
DOI - 10.1111/j.1399-3054.1990.tb05687.x
Subject(s) - senescence , avena , protein biosynthesis , biology , rna , amino acid , cellular senescence , biochemistry , in situ , botany , chemistry , microbiology and biotechnology , organic chemistry , gene , phenotype
Quantitative and qualitative changes in protein synthesis during in situ senescence of oat ( Avena saliva L. cv. Victory) leaf have been examined. The rate of protein synthesis shows a transitory increase during early stages of senescence. This increase is not accompanied by a corresponding increase in amino acid uptake and is smaller when expressed on a dry weight rather than a protein basis. Total protein, total RNA and poly(A) + ‐RNA decline rapidly during senescence. Analysis of protein populations with 2‐D SDS‐PAGE shows that while some proteins decline sharply during leaf senescence, the synthesis of several others is induced or enhanced. Synthesis of new proteins shown in this study may explain the reported requriement for protein synthesis in leaf senescence.