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蒋航 1,2, 黄益宗 1,*, 杨秀文 1, 黄永春 1, 刘岩 1, 胡荣桂 2, 胡红青 2, 熊双莲 2, 刘仕翔 1, 李文华 1. 外源褪黑素对As3+胁迫下水稻种子萌发的影响[J]. 生态毒理学报, 2017, 12(3): 21-
外源褪黑素对As3+胁迫下水稻种子萌发的影响
Effects of Exogenous Melatonin on Seed Germination of Rice under As3+ Stress
  
DOI:10.7524/AJE.1673-5897.20170112008
中文关键词:  褪黑素  水稻  氧化损伤  As3+  萌发
英文关键词:melatonin  rice  oxidative damage  As3+  germination
基金项目:国家科技支撑计划项目(2015BAD05B02)
作者单位
蒋航 1,2, 黄益宗 1,*, 杨秀文 1, 黄永春 1, 刘岩 1, 胡荣桂 2, 胡红青 2, 熊双莲 2, 刘仕翔 1, 李文华 1 1.农业部环境保护科研监测所天津300191 2.华中农业大学资源与环境学院武汉430070 
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中文摘要:
      研究添加外源褪黑素对As3+胁迫下水稻种子萌发及生理指标的影响。结果表明添加外源褪黑素能促进As3+下水稻种子的萌发,提高水稻的发芽势和发芽率,促进水稻幼苗的生长。当As3+浓度为100 μmol L-1时,添加100 μmol L-1褪黑素使水稻种子发芽率和总根长比对照分别提高57.1%和50.0%。添加褪黑素能显著提高As3+胁迫下水稻幼苗中抗氧化酶系统过氧化氢酶(CAT)、过氧化物酶(POD)活性和超氧化物歧化酶(SOD)的活性,并降低水稻幼芽中丙二醛(MDA)的含量。当As3+浓度为100 μmol L-1时,添加50 μmol L-1和100 μmol L-1褪黑素导致水稻幼芽中POD活性比对照处理分别提高57.5%和114.8%,CAT活性提高29.4%和53.8%,SOD活性提高31.5%和56.0%,丙二醛含量比对照处理降低16.5%和31.9%。添加褪黑素也能显著提高As3+胁迫下水稻的根系活力,当As3+浓度为100 μmol L-1时,50、100 μmol L-1褪黑素处理后根系活力比对照分别提高42.4%和124.1%。说明添加外源褪黑素可缓解As3+胁迫对水稻的脂质过氧化损害,有效降低As对水稻内膜的破坏,显著缓解As污染对水稻的毒害作用。
  
AuthorAffiliation
Jiang Hang 1,2, Huang Yizong 1,*, Yang Xiuwen 1, Huang Yongchun 1, Liu Yan 1, Hu Ronggui 2, Hu Hongqing 2, Xiong Shuanglian 2, Liu Shixiang 1, Li Wenhua 11. Agro-Environmental Protection Institute, Ministry of Agriculture, Tianjin 300191, China 2. College of Resources and Environmental, Huazhong Agricultural University, Wuhan 430070, China
英文摘要:
      Effects of adding exogenous melatonin on rice seed germination and some physiological indexes of rice under As3+ stress were investigated. The results showed that adding exogenous melatonin had a positive effect on the seed germination and growth of rice seedlings under As3+ stress. At As3+ concentration of 100 μmol L-1, compared with the control treatment, adding 100 μmol L-1 exogenous melatonin increased the germination rate by 57.1% and total length of roots by 50%. Adding of exogenous melatonin significantly increased autioxidant enzyme activities, such as CAT, POD, SOD, and decreased MDA content. At As3+ concentration of 100 μmol L-1, compared with the control treatment, adding 50 and 100 μmol L-1 exogenous melatonin could significantly increase the activities of POD by 57.5% and 114.8%, SOD by 16.5% and 31.9% , CAT by 31.5% and 56.0% respectively, decrease MDA content by 16.5% and 31.9%. Adding of exogenous melatonin also significantly increased the root activity. At As3+ concentration of 100 μmol L-1, compared with the control treatment, adding 50 and 100 μmol L-1 exogenous melatonin could increase the root activity by 42.4% and 124.1%. The results suggested that application of exogenous melatonin could alleviate lipid peroxidation damage of rice under As3+ stress, effectively reduce the damage to the intracellular membranes of rice, and effectively alleviate the toxic effects of As3+ on rice.
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