作者: Thomas Koch , Katja Bandemer , Wilhelm Boland
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摘要: Flowers of Jasminum rincospernum convert deuterium-labeled jasmonic acid [2H5]-4a and methyl 1,2-didehy-drojasmonate [2H4]-8 into labeled cis-jasmone [2H4]-1. The labeling pattern the resulting (1) is consistent with a Grob fragmentation didehydrojasmonic 8a by decarboxylation after protonation keto group. pathway also operative in leaves several higher plants, including mono- dicotyledonous specimens. In Lima beans besides an equimolar mixture trans- cis-isomers jasmonate (4) epi-4, emitted treatment Jasmonic (4a). relative ratio 1 4/epi-4 critically dependent on concentration administered (4a) ambient temperature plant. Unlike 4a, 1,2-didehydrojasmonic (8a) not able to induce volatile biosynthesis. Therefore, transformation 4avia8 appears have special importance for irreversible inactivation disposal plant stress hormone gas phase may serve, other modes inactivation, as shunt case high internal 4a. conversion biologically active inactive first example metabolite phytohormone infinite sink.