遮荫处理及恢复光照对白菜生长及活性氧代谢的影响

园艺学报 ›› 2008, Vol. 35 ›› Issue (5): 753-756.

遮荫处理及恢复光照对白菜生长及活性氧代谢的影响

黄俊^1,2;郭世荣¹;蒋芳玲¹;陈岚¹;吴震^1*

(¹南京农业大学园艺学院，南京210095；²天津大学农业与生物工程学院，天津 300072)

收稿日期:2007-10-08 修回日期:2008-04-21 出版日期:2008-05-25 发布日期:2008-05-25
通讯作者: 吴震

Effects of Shading Treatment and Regular Light Recovery on Growth and Reactive Oxygen Metabolism of Pak-choi

HUANG Jun^1,2, GUO Shi-rong¹, JIANG Fang-ling¹, CHEN Lan¹, and WU Zhen^1*

(¹College of Horticulture, Nanjing Agricultural University, Nanjing 210095, China；²College of Agriculture and Bioengineering, Tianjin University, Tianjin 300072, China)

Received:2007-10-08 Revised:2008-04-21 Online:2008-05-25 Published:2008-05-25
Contact: WU Zhen

摘要/Abstract

摘要： 以白菜耐弱光品种‘矮王’和不耐弱光品种‘绿优’为材料，研究遮荫处理及恢复光照过程中植株生长、活性氧代谢和抗氧化酶活性的变化。结果表明，遮荫处理后‘矮王’品种生长减缓， ‘绿优’品种生长停滞；2品种的MDA含量、O₂-. 产生速率和H₂O₂含量呈现先下降后上升的趋势， POD活性呈上升趋势，而SOD、CAT、APX等酶活呈先下降后上升的趋势；恢复生长光照后，2品种的 MDA含量、O₂-. 产生速率和H₂O₂含量均迅速上升，几种酶活也呈加速上升趋势。遮荫处理后期与恢复光照后‘绿优’的膜脂过氧化现象较‘矮王’严重，‘矮王’通过增加抗氧化酶活性，有效地减轻了膜脂过氧化程度。

关键词: 白菜, 遮荫, 生长, 活性氧代谢, 抗氧化酶

Abstract:

This paper studied the response of growth, reactive oxygen species metabolism and antioxidative enzyme activities of two different pak-choi cultivars ('Aiwang'and 'Lvyou') to low light under shading treatment and regular light recovery. The results showed that the growth of 'Aiwang' was retarded and the growth of 'Lvyou' was complete inhibited under shading treatment. The MDA content, the O₂-. Production rate and the H₂O₂ content in two cultivars decreased at first and increased later. The POD activities increased under shading treatment while the SOD, CAT and APX decreased firstly and increased later. The activities of all theses enzymes increased remarkably after the recovery of growth light. The results suggested that, under shading treatment and regular light recovery, 'Aiwang' was more efficient on the enhancement of antioxidative enzymes activities to reduce the membrane lipid peroxidation, while 'Lvyou' was subject to a more grave membrane lipid peroxidation.

Key words: Pak-choi, Shading, Growth, Reactive oxygen metabolism, Antioxidant enzymes

中图分类号:

S 634.3

黄俊;郭世荣;蒋芳玲;陈岚;吴震. 遮荫处理及恢复光照对白菜生长及活性氧代谢的影响[J]. 园艺学报, 2008, 35(5): 753-756.

HUANG Jun;GUO Shi-rong;JIANG Fang-ling;CHEN Lan;and WU Zhen . Effects of Shading Treatment and Regular Light Recovery on Growth and Reactive Oxygen Metabolism of Pak-choi [J]. ACTA HORTICULTURAE SINICA, 2008, 35(5): 753-756.

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