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- W2068269739 abstract "Apical sencscence in G2 peas occurs only in long days in the presence of fruit. The effect of fruits could be caused by the export of a senescence hormone from the fruits to the shoot tip. Export of radiolabeled material from developing fruits of G2 peas grown in long days was therefore examined following injection of the pods with [14C]-sucrose, [14C]-acetate, or [14C]-mevalonate or after allowing the pods to photosynthesize in 14CO2 for 48 h. In all cases a small amount (<1%) of radioactivity was exported, primarily to the younger fruits on the same side of the plant and the to the shoot apex. After feeding 14CO2 to the fruit, the radiolabeled material partitioned into acidic ethyl acctate and possessed a carboxyl group. While this radioactivity had chromatographic properties similar to abscisic acid (ABA) in a number of solvent systems, it was not identical to either ABA, phascic acid or dihydrophaseic acid. The nature of the labeled material found in the apex was different in short days, in which senescence does not occur, or when the leaves were the source of the radioactive compounds. The labeled material in the apex was similar after feeding 14CO2, [14C]-acctatc, or [14C]-sucrose, but different if the fruits were injected with[14C]-mevalonate.Identification of the chemical nature of the labeled material in the apex was not possible due to the small amount present. Parallel purification of an extract from treated fruits led to the identification of N-benzoylaspartate and N-phenylacetyl-aspartate. The radiolabeled substance from the apex was run with these two chemically synthesized compounds on several gas chromatogtaphic columns, and was also recrystallized together several times. The label and the pure material did not have identical retention times; neither did they co-purify so that, while similar, the material exported to the apex is not the above compounds." @default.
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- W2068269739 date "1983-12-01" @default.
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- W2068269739 title "The transport of substances out of developing fruits in relation to the induction of apical senescence in Pisum sativum line G2" @default.
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- W2068269739 doi "https://doi.org/10.1111/j.1399-3054.1983.tb06299.x" @default.
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