CHANGES IN CELL ULTRASTRUCTURE AND ENDOGENOUS ABSCISIC-ACID AND INDOLE-3-ACETIC-ACID CONCENTRATIONS IN FATSIA-JAPONICA LEAVES UNDER POLYETHYLENE GLYCOL-INDUCED WATER-STRESS

被引：24

作者：

LOPEZCARBONELL, M ^{[1
]}

ALEGRE, L ^{[1
]}

VANONCKELEN, H ^{[1
]}

机构：

[1] UNIV INSTELLING ANTWERP, DEPT BIOL, Antwerp, BELGIUM

来源：

PLANT GROWTH REGULATION | 1994年 / 15卷 / 02期

关键词：

CELL ULTRASTRUCTURE; ENDOGENOUS ABSCISIC ACID; FATSIA JAPONICA; INDOLE-3-ACETIC ACID; LEAF WATER POTENTIAL; PEG; SELECTIVE STAINING;

D O I：

10.1007/BF00024106

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Ultrastructural alterations in epidermal and mesophyll cells as well as variations in bulk leaf endogenous BBB and IAA concentrations were studied in PEG-treated plants of Fatsia japonica Decne and Plank. Under stress induced by PEG vesicles containing fibrous material and electron-dense bodies associated with plasma membranes were observed. Cytochemical examination indicated that electron-dense bodies corresponded to lipids and the fibrous material of the vesicles were polysaccharides. Chloroplasts, mitochondria, nuclei and Golgi apparatus also showed modifications. A strong relationship was found between increasing PEG-induced water stress, increasing endogenous ABA and ultrastructural changes. In relation with leaf ontogeny and ABA concentration a higher ABA level was observed in younger than in older leaves. The differences in the endogenous concentrations of indole-3-acetic acid are unclear, except after 7 days of PEG-treatment. The increase in the endogenous abscisic acid concentration could be related with the ultrastructural changes.

引用

页码：165 / 174

页数：10

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