摘要
【目的】了解棉花对镉污染土壤的修复能力以及指导耐镉棉花品种的选育工作。【方法】采用酶联免疫法对C184、湘杂棉15和湘419这3个品种在不同镉浓度胁迫下全生育期功能叶的超氧化物歧化酶(Superoxide dismutase,SOD)、过氧化物酶(Peroxidase,POD)过氧化氢酶(Catalase,CAT)的酶活及丙二醛(Malondialdehyde,MDA)的累积量进行了测定比较,同时对三者全生育期各个器官的镉含量及部分农艺性状进行了比较和分析。【结果】镉胁迫下抗氧化酶活性均受到抑制,并随着镉浓度的增加抑制作用愈明显,其中POD活性受到抑制作用最为显著;5 mg·L^(-1)镉胁迫对棉花抗氧化酶活性、MDA的累积以及农艺性状指标的影响最大。【结论】3个棉花品种中杂交种湘杂棉15较其他2个常规棉表现出更优异的镉耐受性及镉累积能力。
[Objective]To improve knowledge of the remediation of cadmium(Cd)contaminated soil,and provide a theoretical and practical basis for breeding of cotton cultivars.[Method]Three cotton cultivars,namely'C184','Xiangzamian15(XZM 15)',and'Xiang419',were used as materials for the study.We compared and analyzed the activity of antioxidant enzymes superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT),using an enzyme-linked immunosorbent assay,under treatment with different Cd concentrations.In addition,the Cd content of various plant organs and agronomic traits were assessed at all cotton growth stages.[Result]Antioxidant enzyme activity was inhibited by Cd treatment,especially that of POD.With increasing Cd concentration,the growth of cotton plants was restrained.The maximum inhibition on antioxidant enzyme activity and agronomic traits was attained at 5 mg·L-1 Cd stress.However,CAT activity was maintained under Cd stress.[Conclusion]XZM 15 showed superior tolerance and accumulation capability for Cd than the other cotton cultivars studied.
作者
陈浩东
贺云新
郭利双
赵瑞元
李玉军
吴佶膛
彭世杰
张志刚
Chen Haodong;He Yunxin;Guo Lishuang;Zhao Ruiyuan;Li Yujun;Wu Jitang;Peng Shijie;Zhang Zhigang(Cotton Sciences Research Institute of Hunan,National Hybrid Cotton Research Promotion Center,Changde,Hunan 415101,China)
出处
《棉花学报》
CSCD
北大核心
2018年第1期62-70,共9页
Cotton Science
基金
国家重点研发计划(2016YFD0100203-13
2016YFD0101409),湖南省自然科学常德联合基金(2016JJ5014),棉花生物学国家重点实验室开放课题(CB2017A09),国家科技支撑计划(2013BAD01B03)
关键词
棉花
镉污染
抗氧化酶
镉积累
cotton
cadmium pollution
antioxidant enzymes
cadmium accumulation
