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- W2022346987 abstract "A B S T R A C T Seniescence of shoot apices of Pisum sativum L. 'Alaska' as measured by cessation of stem elongation was delayed by removal of flowers. Analyses of total RNA, nitrogen, protein and inorganic phosphorus in shoot tips of deflowered and control (flower- and fruit-bearing) plants throughout ontogeny revealed that the levels of all these metabolites declined during senescence. Also throughout ontogeny shoot tips of control and deflowered plants were compared with respect to their ability to enzymically degrade RNA and to take up and incorporate P23-orthophosphate into RNA. The specific activity of ribonuLclease increased as senescence progressed while the absolulte activity appeared to decrease in correlation with a decrease in total nitrogen content. Compared with nonsenescing shoot tips, senescing shoot tips accumulated less p32 but exhibited an apparent enhancement of p32 incorporation into RNA, which was attributed to a reductionl in the endogenious phosphorus pool causing a smaller dilution of the accumulated p32. It is concliided that decreases in the levels of RNA, protein and inorganic phosphorus and in. the transpirational uptake of nutrients are factors correlated with seniescence of the shoot apex." @default.
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- W2022346987 date "1969-03-01" @default.
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- W2022346987 title "RNA AND PROTEIN METABOLISM IN SENESCENT SHOOT APICES OF ‘ALASKA’ PEAS" @default.
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- W2022346987 doi "https://doi.org/10.1002/j.1537-2197.1969.tb07539.x" @default.
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