THE DEVELOPMENT OF STRUCTURAL-CHANGES IN EPIDERMAL-CELLS OF MAIZE ROOTS DURING WATER-STRESS

被引：5

作者：

CIAMPOROVA, M

机构：

[1] Institute of Experimental Biology and Ecology, Slovak Academy of Sciences, Bratislava, 814 34

来源：

BIOLOGIA PLANTARUM | 1987年 / 29卷 / 04期

关键词：

D O I：

10.1007/BF02892792

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Ultrastructural changes following increasing periods of water stress induced by means of polyethylene glycol 4000 (from 5 min to 18 h) were investigated in young epidermal cells of the primary roots of Zea mays. The sensitivity of the individual cell components to water stress was considered according to the time sequence in which their alterations appeared. Endoplasmic reticulum (ER) and mitochondria proved to be the most sensitive cell components, their structure changing after 5 min of water stress. By 8 h of stress, the condensation of nuclear chromatin in some cells was apparent, preceding polyribosome degradation but not all the other changes of the stressed cells. Similar types of structural alterations appeared slightly earlier in the more differentiated epidermal cells. The rapid changes in the structure of ER and mitochondria coincided with the rapid decrease of water potential of the root tips and the immediate cessation of the root growth. © 1987 Academia.

引用

页码：290 / &

共 17 条

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