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- W2029461714 abstract "S-adenosyl-L-methionine decarboxylase was detected in crude extract from the plumular hook of etiolated pea seedlings. The enzyme showed a Km of 0.2mM for S-adenosyl-Lmethionine and a Vmax of 4.76 nmol/mg protein/h. It was not activated by putrescine or by Mg++ and was inhibited by methyl glyoxal-bis-guanyl hydrazone with an I50 of 1µM. Treatment of pea seedlings with ethylene resulted in a 75 % reduction of the enzyme activity with an I50 of 0.3 µl/1 and a maximal effect at 6µl/l. The reduction was observed within 1 hour after exposure to ethylene, reaching a maximum at 18 hours. Upon transferring the ethylenetreated plants to an ethylene-free atmosphere the enzyme gradually recovered from the inhibition, showing a complete recovery within 6 hours. Exposing pea seedlings to treatments that caused a reduction in the endogenous level of ethylene resulted in a 30–48 % increase in the enzyme activity. In view of the results of this study, the possibility that ethylene at the endogenous level might regulate S-adenosyl-L-methionine decarboxylase activity is discussed." @default.
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- W2029461714 date "1985-06-01" @default.
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- W2029461714 title "Influence of Ethylene on S-adenosylmethionine Decarboxylase Activity in Etiolated Pea Seedlings" @default.
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- W2029461714 doi "https://doi.org/10.1016/s0176-1617(85)80101-2" @default.
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