| 李冬琴,陈桂葵,郑海,黎华寿,李小兵.镉对两品种玉豆生长和抗氧化酶的影响[J].农业环境科学学报,2015,34(2):221-226. |
| 镉对两品种玉豆生长和抗氧化酶的影响 |
| Effects of Cadmium on Growth and Antioxidant Enzyme Activities of Two Kidney Bean(Phaseolus vulgaris L.)Cultivars |
| 投稿时间：2014-09-14 |
| DOI：10.11654/jaes.2015.02.003 |
| 中文关键词: 镉胁迫 玉豆 生长 根构型 抗氧化酶 |
| 英文关键词: cadmium stress kidney bean growth root architecture antioxidant enzymes |
| 基金项目:国家高技术研究发展计划(863计划)项目(2013AA102402);广东省科技计划项目(2012A020100003) |
| 作者 | 单位 | E-mail | | 李冬琴 | 华南农业大学 农业部华南热带农业环境重点实验室, 广东省高等学校农业生态与农村环境重点实验室, 广州 510642 | | | 陈桂葵 | 华南农业大学 农业部华南热带农业环境重点实验室, 广东省高等学校农业生态与农村环境重点实验室, 广州 510642 | | | 郑海 | 华南农业大学 农业部华南热带农业环境重点实验室, 广东省高等学校农业生态与农村环境重点实验室, 广州 510642 | | | 黎华寿 | 华南农业大学 农业部华南热带农业环境重点实验室, 广东省高等学校农业生态与农村环境重点实验室, 广州 510642 | lihuashou@scau.edu.cn | | 李小兵 | 华南农业大学 农业部华南热带农业环境重点实验室, 广东省高等学校农业生态与农村环境重点实验室, 广州 510642 | |
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| 中文摘要: |
| 利用水培盆栽试验,研究了不同浓度的镉胁迫对两种(优选和特选)玉豆(Phaseolus vulgaris Linn)株高、植株生物量、根构型和叶片中抗氧化酶活性的影响.结果表明:镉胁迫显着抑制了两种玉豆的株高、生物量、总根长、总根表面积、根平均直径和根总体积,且对特选玉豆的抑制程度大于优选玉豆;镉胁迫使两种玉豆的丙二醛(Malondialdehyde, MDA)含量和过氧化物酶(Peroxidase, POD)活性持续增强,超氧化物歧化酶(Superoxide dismutase, SOD)活性则呈现低浓度增加高浓度下降的趋势;特选玉豆的过氧化氢酶(Catalase, CAT)活性呈低浓度增加高浓度下降趋势,但优选玉豆的CAT活性则持续增强,且特选玉豆的MDA含量、SOD活性和CAT活性的变化幅度都大于优选玉豆,但优选玉豆的POD活性大于特选玉豆.上述结果说明优选玉豆对镉胁迫的耐性高于特选玉豆. |
| 英文摘要: |
| Different genotypes of plants show various tolerances to and accumulation of heavy metals. Here a hydroponic experiment was conducted to investigate the effects of different concentrations of cadmium on plant height, biomass, root configuration, and antioxidant enzyme activities of two cultivars of kidney beans, viz. Texuan and Youxuan. Results showed that plant height, plant biomass, root length, total root surface area, average root diameter and total root volume were all significantly inhibited under cadmium stresses. The inhibitory effect of cadmium on Texuan kidney bean was greater than that of Youxuan kidney bean. Increasing cadmium concentrations increased malondialdehyde(MDA) contents and peroxidase(POD) activities of two cultivars. Superoxide dismutase(SOD) activity of two cultivars increased at low Cd concentrations, but decreased at high concentrations. Catalase(CAT) activity of Texuan kidney bean increased at low Cd concentrations whereas it decreased at high Cd concentrations. That of Youxuan kidney bean, however, increased with increasing cadmium concentrations. The variations in MDA contents, and SOD and CAT activities were greater for Texuan bean than Youxuan kidney bean, while that for the POD activity was just opposite. These results indicate that tolerance of Youxuan kidney bean to cadmium stress is much greater than that of Texuan kidney bean. |
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