亚适温、弱光照及盐胁迫下辣椒叶片活性氧代谢特征

园艺学报 ›› 2009, Vol. 36 ›› Issue (11): 1603-1610.

亚适温、弱光照及盐胁迫下辣椒叶片活性氧代谢特征

张志刚;尚庆茂^*;王立浩;毛胜利;张宝玺

(中国农业科学院蔬菜花卉研究所, 北京100081)

收稿日期:2009-05-21 修回日期:2009-08-05 出版日期:2009-11-25 发布日期:2009-11-25
通讯作者: 尚庆茂

The Characteristics of Active Oxygen Metabolism in Pepper Leaf Cells underSuboptimal Temperature, Weak Light and Salt Stress

ZHANG Zhi-gang;SHANG Qing-mao^*;WANG Li-hao;MAO Sheng-li;ZHANG Bao-xi

( Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing 100081,China)

Received:2009-05-21 Revised:2009-08-05 Online:2009-11-25 Published:2009-11-25
Contact: SHANG Qing-mao

摘要/Abstract

摘要： 测定了亚适温(18 ℃/10 ℃, 昼/夜) 、弱光(80μmol·m- 2 ·s- 1 ) 及盐胁迫(70 mmol·
L ^-1NaCl) 逆境下辣椒叶片抗氧化酶活性及活性氧、丙二醛(MDA) 含量等指标。整个试验期间(处理后1～15 d) , 亚适温、弱光与盐胁迫对SOD、CAT、GR活性均存在显著或极显著的互作效应, 试验前期(处理后1～9 d) 对APX、GPX活性及O₂^- 、H₂O₂含量存在显著或极显著的互作效应, 试验后期(处理后5～15 d) 对MDA含量存在显著或极显著的互作效应。亚适温主效应对辣椒叶片SOD、GPX、GR活性及O₂^- 、H₂O₂、MDA含量的影响大于弱光、盐胁迫主效应, 对APX、CAT活性影响较大的是盐胁迫主效应。

关键词: 辣椒, 亚适温, 弱光, 盐胁迫, 活性氧代谢

Abstract: Active oxygen production rate, antioxidant enzyme activity and malondialdehyde (MDA) content were determined for testing the effects of subop timal temperature (18 ℃/10 ℃, day/night) , weak light
(80μmol·m^-2 ·s^-1 ) and salt (70 mmol·L^-1NaCl) stress on the characteristics of active oxygen metabolism in pepper leaf cells. Significant or extremely significant interaction of subop timal temperature, weak light,and salt stress on the superoxide dismutase ( SOD) , catalase (CAT) , glutathione reductase ( GR) activity were observed during the experiment. Also, at the early stage, there were significant or extremely significant interaction on the activities of ascorbate peroxidase (APX) , glutathione peroxidase (GPX) and the contents of O₂^-, H₂O₂, similarly, on the content of MDA in late stage. The main effects of salt stress on the APX, CAT activity were higher than that of suboptimal temperature, weak light. The main effects of subop timal temperature were greater to other indexes.

Key words: pepper, suboptimal temperature, weak light, salt stress, active oxygen metabolism

中图分类号:

张志刚;尚庆茂;王立浩;毛胜利;张宝玺. 亚适温、弱光照及盐胁迫下辣椒叶片活性氧代谢特征[J]. 园艺学报, 2009, 36(11): 1603-1610.

ZHANG Zhi-gang;SHANG Qing-mao;WANG Li-hao;MAO Sheng-li;ZHANG Bao-xi. The Characteristics of Active Oxygen Metabolism in Pepper Leaf Cells underSuboptimal Temperature, Weak Light and Salt Stress[J]. ACTA HORTICULTURAE SINICA, 2009, 36(11): 1603-1610.

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