Probing a Membrane Matrix Regulating Hormone Action: II. The Kinetics of Lipid-Induced Growth and Ethylene Production 1

AUTOR(ES)

Iwata, Takashi

RESUMO

Lipids which are active oleanimins, i.e., those which stimulate respiration and auxin-induced cell elongation of pea stem sections, also initiate a period of ethylene formation in them after a lag period of at least 1 hour. Production of ethylene requires auxin, is inhibited by cycloheximide and dinitrophenol applied during or before the lag period, and is greatly stimulated by lipids longer than 20 Ångstroms in length such as heptadecyl-benzene, chloro- or iodohexadecane, triolein, and vitamins E and K1, but not by the shorter chloro- and iododecane. β-Stigmasterol at 10 to 40 μm concentrations depresses both oleanimin-induced growth and ethylene formation.

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