Cadmium-induced changes in chloroplast lipids and photosystem activities in barley plants

被引：80

作者：

Vassilev, A

Lidon, F

Scotti, P

Da Graca, M

Yordanov, I

机构：

[1] Agr Univ Plovdiv, Dept Plant Physiol & Biochem, BG-4000 Plovdiv, Bulgaria

[2] Univ Nova Lisboa, Fac Ciencias & Tecnol, P-2825114 Caparica, Portugal

[3] INIA, Estacao Agron Nacl, P-2784505 Oeiras, Portugal

[4] Acad M Popov, Inst Plant Physiol, BG-1113 Sofia, Bulgaria

来源：

BIOLOGIA PLANTARUM | 2004年 / 48卷 / 01期

关键词：

ethylene; fatty acids; Hordeum vulgare; photosystems; 1; and; 2; photosynthesis;

D O I：

10.1023/B:BIOP.0000024295.27419.89

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Fatty acid content and composition of chloroplast membranes, ethylene production associated with thylakoid lipids degradation as well as photosynthetic electron transport involving photosystems 1 and 2 were used to determine the effects of increasing Cd concentrations in the growth medium [0, 14, 28, and 42 mg(Cd) kg(-1)(sand)] on the photosynthetic performance of barley plants (H. vulgare L., cv. CE9704). High concentrations of Cd triggered serious disturbances of the chloroplast membranes. Ethylene production increased whereas a drop of 18: 3 fatty acid content occurred, indicating that Cd mediates lipid peroxidation in the thylakoids. The enhanced ethylene production could be used as an early indicator of Cd-induced membrane degradation, yet at very high concentration (42 mg kg(-1)) Cd decreased ethylene production.

引用

页码：153 / 156

页数：4

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