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脱落酸对玉米胚芽和大豆子叶线粒体呼吸的影响

陈靠山, 周燮, 张举仁

山东大学生命科学学院.山东,济南 250100；南京农业大学农学系.江苏,南京 210095

摘要

在提取玉米和大豆线粒体后,以ABA处理线粒体,发现在不同底物存在下,ABA均可增加线粒体的耗氧速率,呼吸速率随ABA浓度变化的结合常数(Kd)值为1.43#mu#mol/L。ABA对4态呼吸的促进作用更为显著,因而导致呼吸控制下降,P/O比降低。蛋白质合成抑制剂环己酰亚胺不影响ABA的效应。以ABA预处理大豆子叶,虽然也促进了呼吸作用,但不改变呼吸控制和P/O。

关键词： 脱落酸; 线粒体; 呼吸作用

The effect of abscisic acid on respiration of isolated mitochondria

Chen Kaoshan, Zhou Xie, Zhang Juren

College of Life Science,Shandong University.Jinan 250100,Shandong；China

Abstract

The effect of ABA on the rate of respiration exhibited Michaelis-Menten kinetics, with a Kd value of 1.43#mu#mol/L. The respiration of mitochondria isolated from maize and soybean was all stimulated by ABA. The effect of ABA was stronger on state 4 than on state 3, signfying that it induced a decrease in respiratory control (RC) and P/O. The "break" temperature of the Arrhenius plot for respiration rate and P/O rate was also lowered by ABA treatment.

Key words: Abscisic acid;Mitochondria;Respiration

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引用本文：

陈靠山, 周燮, 张举仁. 脱落酸对玉米胚芽和大豆子叶线粒体呼吸的影响[J]. 生理学报 1998; 50 (2): .

Chen Kaoshan, Zhou Xie, Zhang Juren. The effect of abscisic acid on respiration of isolated mitochondria. Acta Physiol Sin 1998; 50 (2): (in Chinese with English abstract).