期刊论文

[Effects of cadmium stress on fatty acid composition and lipid peroxidation of Malus hupehensis].

中文

应用生态学报

Chinese Journal of Applied Ecology

1001-9332

2009

20

8

2032-2037

国家自然科学基金;教育部留学回国人员科研启动基金

本校为其他机构

以平邑甜茶幼苗为试材,研究了镉胁迫下幼苗叶片和根系膜脂肪酸构成、活性氧、脂氧合酶和丙二醛含量的变化.结果表明:氯化镉处理后7～12 h,脂肪酸种类及其相对含量变化最为明显.处理后7 h,叶片和根系脂肪酸不饱和水平升至最高,含量分别达82.82%和72.43%;叶片可检测到的脂肪酸在处理后12 h由11种增至14种,根系则在处理17 h后由4种增至6种.O_2~(-·)产生速率在处理3 h、H_2O_2含量在处理7 h时升至最高,丙二醛含量和脂氧合酶活性则随着处理时间的延长逐渐增加.镉胁迫通过诱导活性氧和脂氧合酶来改变平邑甜茶脂肪酸构成,并引起脂质过氧化;镉处理12 h前,脂质过氧化是活性氧和脂氧合酶的共同结果;但处理...

This paper studied the fatty acid composition, reactive oxygen species （ROS）, lipoxygenase （LOX） activity, and malondialdehyde （MDA） content in the leaves and roots of Malus hupehensis seedlings under effects of cadmium （Cd） stress. Noticeable changes were observed in the kinds and relative contents of fatty acids after treated with CdC12 for 7-12 hours. The relative con- tents of unsaturated fatty acids in leaves and roots reached the maximum after treated for 7 hours, being 82. 82% and 72.43% , respectively. The kinds of fatty acids i...