| Cd~(2+)胁迫对小麦幼苗生理生化特性的影响 |
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| 引用本文： | 魏学玲,史如霞,杨颖丽,张园园,贾鹏翔,姜羽.Cd~(2+)胁迫对小麦幼苗生理生化特性的影响[J].西北植物学报,2009,29(10). |
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| 作者姓名： | 魏学玲 史如霞 杨颖丽 张园园 贾鹏翔 姜羽 |
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| 作者单位： | 西北师范大学,生命科学学院,兰州,730070 |
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| 基金项目： | 兰州市科技发展计划项目，甘肃省中青年科技研究基金项目 |
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| 摘 要： | 以小麦品种'西旱2号'和'宁春4号'幼苗为材料,采用室内水培实验研究了不同浓度Cd(NO3)2处理对叶绿素含量、抗氧化酶活性及渗透性调节物含量等的影响.结果表明,两小麦品种幼苗的叶绿素a(Chl a)、叶绿素b(Chl b)及叶绿素总量在镉胁迫下均比对照降低,且高浓度镉对'西旱2号'幼苗叶片Chl b的破坏程度强于Chl a;两品种镉胁迫幼苗的过氧化氢酶(CAT)、过氧化物酶(POD)和抗坏血酸过氧化物酶(APX)活性均比对照不同程度地升高;两品种镉胁迫幼苗的可溶性糖含量均与对照无显著差异,但'宁春4号'幼苗叶片的脯氨酸含量却比对照显著升高,且此效应具有浓度依赖性;镉胁迫下两品种小麦幼苗叶片的MDA含量变化与对照无显著差异.研究显示,两品种小麦幼苗叶片的光合色素在镉胁迫下均受到不同程度的破坏,但它们均能通过增加体内保护酶活性和渗透调节物质含量来缓解膜脂过氧化伤害,从而对镉胁迫均表现出较强的耐受能力.
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| 关 键 词： | Cd2+胁迫 小麦幼苗 叶绿素 抗氧化酶 脯氨酸 |
Physiological and Biochemical Properties of Wheat Seedlings under Cadmium Stress |
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| WEI Xue-ling,SHI Ru-xia,YANG Ying-li,ZHANG Yuan-yuan,JIA Peng-xiang,JIANG Yu.Physiological and Biochemical Properties of Wheat Seedlings under Cadmium Stress[J].Acta Botanica Boreali-Occidentalia Sinica,2009,29(10). |
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| Authors: | WEI Xue-ling SHI Ru-xia YANG Ying-li ZHANG Yuan-yuan JIA Peng-xiang JIANG Yu |
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| Institution: | WEI Xue-ling,SHI Ru-xia,YANG Ying-li,ZHANG Yuan-yuan,JIA Peng-xiang,JIANG Yu(College of Life Science,Northwest Normal University,Lanzhou 730070,China) |
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| Abstract: | Two kinds of wheat,cv.'Xihan 2' and 'Ningchun 4',were employed to study the changes of physiological and biochemical properties under different cadmium nitrate concentration treatments,such as chlorophyll content,antioxidant enzyme activities and osmotic regulations.The results showed that the amount of chlorophyll a,chlorophyll b and total chlorophyll in seedlings of the two cultivars exposed to cadmium nitrate was all decreased,and the destroy to chlorophyll b was more serious than to chlorophyll a in 'Xi... |
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| Keywords: | Cd2 stress wheat seedling chlorophyll antioxidant enzyme proline |
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