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水分胁迫下ABA由蚕豆根向地上部的运输及其在叶片组织中的分布

贾文锁, 王学臣, 张蜀秋, 娄成后

北京农业大学生物学院.北京 100094

摘要

蚕豆根装载的~(3)H-ABA可以5.6 cm/min以上的速率向冠部运输。短时间内(5 min)根运来的ABA主要分布在有大量气孔密布的下表皮,但长时间内(3h)则主要分布在叶肉组织中。抑制蒸腾可降低ABA向叶片中的运输积累。光镜放射自显影术显示,根运来的ABA可有效地在表皮细胞及保卫细胞的质外体积累。~(3)H-ABA由根向地上部快速运输及其在作用部位的有效积累,说明水分胁迫下蚕豆根部可以通过ABA信号的传递控制气孔的行为。

关键词： 水分胁迫; ABA; 运输; 保卫细胞

The transport of ABA from root to shoot and its distribution in response to water stress in Vicia faba L.

Jia Wensuo, Wang Xuechen, Zhang Shuqiu, Lou Chenghou

College of Biological Sciences, Beijing Agricultural University. Beijing 100094

Abstract

~(3)H-ABA loaded in roots of Vicia faba L. could be transported to shoot at a speed of 5.6 cm/min or higher in a relatively short period of 5 min. ABAtransported from roots was distributed mainly in the epidermis. However, after 3 h, it was mainly distributed in mesophyll cells. When the transport was inhibited by covering the leaf surfacc with Parafilm, the transport and accumulation of ABAin leaves declined substantially. The results of autoradiography showed that ABA transported from roots to shoots could be distributied in the apoplast of guard cells and epidermal cells. The rapid transport of ABAfrom root to shoot and its accumulation in apoplast of guard cells indicated that stomatal movement could be controled by ABA communication from root to shoot in response to water stress in Vicia faba L.

Key words: Water stress;ABA;Transport;Guard cell

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引用本文：

贾文锁, 王学臣, 张蜀秋, 娄成后. 水分胁迫下ABA由蚕豆根向地上部的运输及其在叶片组织中的分布[J]. 生理学报 1996; 48 (4): .

Jia Wensuo, Wang Xuechen, Zhang Shuqiu, Lou Chenghou. The transport of ABA from root to shoot and its distribution in response to water stress in Vicia faba L.. Acta Physiol Sin 1996; 48 (4): (in Chinese with English abstract).