锌对玉米（Zea mays L.）叶片抗氧化反应的影响。

Effect of zinc on antioxidant response in maize (Zea mays L.) leaves.

作者信息

Pandey N, Singh A K, Pathak G C, Sharma C P

机构信息

Botany Department, University of Lucknow, Lucknow 226 007, India.

出版信息

Indian J Exp Biol. 2002 Aug;40(8):954-6.

PMID:12597030

Abstract

Maize (Zea mays L. cv kanaujia) plants grown with Zn [10 (control), 0.1 (low) and 20 microM (high)], were investigated for concentration of antioxidants and activities of antioxidative enzymes in leaves. Young leaves of low Zn plants developed whitish-necrotic spots. Leaves of both low and high Zn plants showed decrease in chlorophyll concentration and accumulation of lipid peroxides, ascorbate and dehydroascorbate, associated with a decrease in the activity of ascorbate peroxidase and superoxide dismutase. Low and high Zn, however, showed diverse effect on glutathione reductase. While low Zn increased the activity of glutathione reductase, high Zn decreased its activity. Zinc effect on antioxidative constituents suggested Zn involvement in sustaining the antioxidative defense system in maize leaves.

摘要

研究了在不同锌浓度[10（对照）、0.1（低）和20微摩尔（高）]条件下生长的玉米（Zea mays L. cv kanaujia）植株叶片中抗氧化剂的浓度和抗氧化酶的活性。低锌植株的幼叶出现白色坏死斑点。低锌和高锌植株的叶片均显示叶绿素浓度降低以及脂质过氧化物、抗坏血酸和脱氢抗坏血酸积累，同时抗坏血酸过氧化物酶和超氧化物歧化酶的活性降低。然而，低锌和高锌对谷胱甘肽还原酶表现出不同的影响。低锌增加了谷胱甘肽还原酶的活性，而高锌降低了其活性。锌对抗氧化成分的影响表明锌参与维持玉米叶片的抗氧化防御系统。