| 重金属Cr6+胁迫对玉米幼苗生理生化特性的影响 |
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| 引用本文： | 王启明.重金属Cr6+胁迫对玉米幼苗生理生化特性的影响[J].河南农业科学,2006(8):37-40. |
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| 作者姓名： | 王启明 |
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| 作者单位： | 商丘师范学院生物系,河南,商丘,476000 |
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| 摘 要： | 研究了不同浓度(0,10,20,50,100 mg/L K2Cr2O7)Cr6 胁迫对玉米幼苗根和上胚轴中脯氨酸(Pro)和丙二醛(MDA)含量、细胞膜透性、超氧化物歧化酶(SOD)及过氧化物酶(POD)等保护酶活性的影响。结果表明,随着Cr6 胁迫浓度的增加,根和上胚轴中Pro含量呈先升后降的趋势,MDA含量和细胞膜透性则持续递增,SOD活性逐渐下降,POD活性先升后降。且根部对Cr6 胁迫的反应较上胚轴敏感。
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| 关 键 词： | 玉米 铬胁迫 生理生化指标 |
| 文章编号： | 1004-3268(2006)08-0037-04 |
| 收稿时间： | 2006-03-07 |
| 修稿时间： | 2006年3月7日 |
Effects of Heavy Metal Cr6+ Stress on Physiological and Biochemical Parameters of Maize Seedlings |
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| WANG Qi-ming.Effects of Heavy Metal Cr6+ Stress on Physiological and Biochemical Parameters of Maize Seedlings[J].Journal of Henan Agricultural Sciences,2006(8):37-40. |
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| Authors: | WANG Qi-ming |
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| Abstract: | The effects of different concentrations of Cr~6 (0,10,20,50,100 mg/L K_2Cr_2O_7)on the content of Pro,malondialdehyde(MDA),membrane permeability,activities of protective enzyme SOD and POD in roots and epicotyls of maize seedlings were studied.The results were as the follows: with the rising of Cr~6 concentration,the Pro content in both root and epicotyls was first up and then down;the content of MDA and membrane permeability increased continuously;SOD activity deceased gradually and POD activity was first up and then down.Furthermore,the roots were more sensitive than epicotyls to Cr~6 ion stress. |
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| Keywords: | Maize Cr~6 stress Physiological and biochemical parameters |
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