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Effects of (22S,23S)-Homobrassinolide and Related Compounds on Membrane Potential and Transport of Egeria Leaf Cells

机译:(22S,23S)-高油菜素内酯及相关化合物对艾美叶细胞膜电位和转运的影响

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摘要

(22S,23S)-Homobrassinolide was tested for its effect on the electric cell potential, proton extrusion, ferricyanide reduction, and amino acid and sucrose uptake of leaves of Egeria densa Planchon. In the light, (22S,23S)-homobrassinolide and its derivative, 2α-3α-dihydroxy-5α-stigmast-22-en-6-one, were similar to each other and similar to fusicoccin in causing hyperpolarization and proton extrusion, whereas stigmasterol was less effective. In darkness, the three sterols showed comparable effects. (22S,23S)-Homobrassinolide slightly stimulated ferricyanide reduction and promoted uptake of sucrose and α-aminoisobutyric acid. The results are compatible with a stimulation of an electrogenic proton pump mechanism at the plasmalemma by (22S,23S)-homobrassinolide.
机译:测试了(22S,23S)-高油菜素内酯对Egeria densa Planchon叶片的电势,质子挤出,铁氰化物还原以及氨基酸和蔗糖吸收的影响。就此而言,(22S,23S)-高油菜素内酯及其衍生物2α-3α-二羟基-5α-stigmast-22-en-6-one在引起超极化和质子挤出方面彼此相似且与岩藻球蛋白相似,而豆甾醇的效果较差。在黑暗中,这三种固醇的效果相当。 (22S,23S)-高油菜素内酯可轻微刺激铁氰化物还原并促进蔗糖和α-氨基异丁酸的摄取。该结果与(22S,23S)-高油菜素内酯对质膜的电质子泵机制的刺激是相容的。

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