ISSN 0371-0874, CN 31-1352/Q

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胡萝卜愈伤组织细胞中与重力相关酯酶(grEST1和grEST2)的鉴别

蔡伟明, 管培珠, 赵炜, 殷俊, 费翅鲲

中科院上海植物生理研究所.上海 200032

摘要

用水平回转器改变重力对细胞的作用方式并用以模拟微重力对胡萝卜细胞的影响。经硼酸缓冲液(pH8.8)提取,聚丙烯酰胺凝胶垂直平板电泳图谱显示8条酯酶带。其中,只有两种酯酶活力受回转处理的影响。对此分别称它们为grEST1和grEST2,即和重力作用相关的酯酶。在正常重力和回转处理的条件下胡萝卜愈伤组织细胞中所表现出的两者之间的差异随着时间的推移而加大。在实验期间,正常重力条件下的胡萝卜愈伤组织细胞中的grEST1和grEST2活力的增加量高于经回转处理的细胞。经回转处理的胡萝卜愈伤组织细胞在正常重力条件下再培养7d后,grEST1和grEST2的活力可以回复到正常水平。毒扁豆碱、乙酰胆碱碘化物、对氯高汞苯甲酸和二异丙基氟磷酸这4种化合物对grEST1和grEST2活力没有抑制作用。这显示grEST1和grEST2活性具有乙酰酯酶的性质。

关键词: 胡萝卜; 酯酶; 乙酰酯酶; 微重力; 回转器

Identification of gravity-related esterases (grEST1 and grEST2) in carrot callus cells

Cai Weiming, Guan Peizhu, Zhao Wei, Yin Jun, Fei Chikun

Shanghai Institute of Plant Physiology,Chinese Academy of Sciences.Shanghai 200032

Abstract

We suggest that the effect of simulated microgravity conditions on grEST1 and grEST2 activities in carrot callus cells is through affecting their synthesis. In addition, the activities of grEST1 and grEST2 were not inhibited by eserine, acetylcholine iodide, diisopropyl fluorophosphate and p-chloromercuribenzoate, which indicates that they are acetylesterases.

Key words: Carrot;Estezase;Acetylesterase;Microgravity;Clinostat

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引用本文:

蔡伟明, 管培珠, 赵炜, 殷俊, 费翅鲲. 胡萝卜愈伤组织细胞中与重力相关酯酶(grEST1和grEST2)的鉴别[J]. 生理学报 1998; 50 (4): .

Cai Weiming, Guan Peizhu, Zhao Wei, Yin Jun, Fei Chikun. Identification of gravity-related esterases (grEST1 and grEST2) in carrot callus cells. Acta Physiol Sin 1998; 50 (4): (in Chinese with English abstract).