| 氯化镧对铝胁迫下大豆幼苗抗氧化能力及光合性能的影响 |
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| 引用本文： | 黄守程,高青海,舒英杰,何庆元,陆晓民.氯化镧对铝胁迫下大豆幼苗抗氧化能力及光合性能的影响[J].安徽科技学院学报,2016,50(2):10-15. |
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| 作者姓名： | 黄守程 高青海 舒英杰 何庆元 陆晓民 |
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| 作者单位： | 安徽科技学院生命科学学院,安徽凤阳,233100;安徽科技学院农学院,安徽凤阳,233100 |
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| 基金项目： | 安徽省高等学校自然科学项目(KJ2016A172)；安徽省现代农业产业技术体系专项-蔬菜产业技术体系(AHCYTX-13)；安徽科技学院蔬菜学重点学科(AKZDXK2015C05)；安徽省自然科学基金项目(1608085MC69)，安徽省高校优秀青年人才支持计划重点项目(gxyqzd2016216)。 |
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| 摘 要： | 目的:探究镧对大豆铝胁迫的缓解效应;方法:以铝敏感大豆BD2为材料,进行50μmol/L铝胁迫处理,然后添加不同浓度氯化镧(10、100和1000 mg L/L)测定大豆幼苗抗氧化及光合指标;结果:与对照组相比较,铝胁迫导致大豆幼苗根系伸长率、根冠比、鲜重及干重显著降低,叶片SOD、POD活性显著降低,且MDA含量显著升高,叶绿素与类胡萝卜素含量、光合速率、蒸腾速率、气孔导度及胞间CO_2浓度也均显著下降;而与铝胁迫处理相比,不同浓度镧处理对大豆幼苗根长、鲜重与干重、SOD与POD活性有不同程度地促进作用,并显著降低MDA含量,同时提高叶绿素与类胡萝卜素含量,增强光合速率、蒸腾速率、气孔导度和胞间CO_2浓度,其中以10 mg/L镧处理效果最好;结论:适宜浓度的镧处理能够通过增强大豆幼苗的抗氧化能力,提高其光合性能,提高大豆幼苗对铝胁迫的适应能力,有效缓解铝对大豆幼苗生长的毒害。
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| 关 键 词： | 大豆 稀土元素 镧 光合作用 抗氧化能力 |
Effects of LaCl3 on the Photo-synthesis and Anti-oxidant Capacity of Soybean Seedlings Under Aluminum Stress |
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| HUANG Shou-cheng,GAO Qing-hai,SHU Ying-jie,HE Qing-yuan,LU Xiao-min.Effects of LaCl3 on the Photo-synthesis and Anti-oxidant Capacity of Soybean Seedlings Under Aluminum Stress[J].Journal of Anhui Science and Technology University,2016,50(2):10-15. |
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| Authors: | HUANG Shou-cheng GAO Qing-hai SHU Ying-jie HE Qing-yuan LU Xiao-min |
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| Abstract: | Objective:To investigate the alleviation effects of trace earth element on soybean seedlings under alu-minum stress. Methods:Aluminum( Al)sensitive soybean cultivar BD2 was exposed to 50μmol/L Al3﹢ stress and determined the antioxidant performance and photosynthesis parameters after the addition of different concen-trations of lanthanum chloride( LaCl3 ,10、100、1000 mgL/L). Results:Compared with the control,Al stress led to significant decrease of root elongation rate,root-shoot ratio,fresh and dry weight as well as the SOD and POD activities,but caused the increase of MDA content of soybean seedlings. Al3﹢ stress also resulted in the de-crease of chlorophyll and carotenoid contents,leaf photosynthetic rate,transpiration rate,stomatal conductance and intercellular CO2 concentration. However,comparing with the Al stress treatment,addition of La can not on-ly promote the root elongation,root-shoot ratio,fresh and dry weight as well as SOD and POD activities while reduced the MDA content of soybean seedlings in varied degrees,but also enhance chlorophyll and carotenoid contents,photosynthetic rate,transpiration rate,stomatal conductance and intercellular CO2 concentration. And 10 mgL/L La was found to be the most effective concentration. Conclusions:Appropriate addition of LaCl3 , therefore,can enhance the antioxidant capacity and the photosynthetic performance of soybean,through which enhances its tolerance to Al3﹢ stress,and finally alleviates Al toxicity on the growth of soybean seedlings. |
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| Keywords: | Soybean Rare earth elements Lanthanum Photosynthesis Antioxidant capacity |
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