| 外源硫化氢缓解水稻盐胁迫的作用机理 |
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| 引用本文： | 谢平凡,邱冬冬,陈珍.外源硫化氢缓解水稻盐胁迫的作用机理[J].贵州农业科学,2017,45(3). |
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| 作者姓名： | 谢平凡 邱冬冬 陈珍 |
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| 作者单位： | 台州学院生命科学学院,浙江省植物进化生态学与保护重点实验室,浙江台州318000 |
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| 基金项目： | 台州学院校立科研项目“硫化氢在缓解水稻汞胁迫中的作用研究” |
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| 摘 要： | 为探明外源H_2S缓解水稻盐胁迫的作用机理,以水稻日本晴为材料,在水培条件下,研究H_2S对NaCl胁迫下5叶期水稻幼苗生长与活性氧(ROS)代谢和抗氧化酶系统的影响。结果表明:100mmol/L NaCl处理严重抑制水稻幼苗的生长,诱导ROS的产生,造成氧化损伤;盐胁迫下添加抗氧化酶抑制剂(二乙基二硫代氨基甲酸钠DDC或3-氨基-1,2,4-三唑AT),活性氧(ROS)得不到及时有效分解而高水平累积,加剧了氧化胁迫对植物的伤害;在盐胁迫条件下添加100μmol/L NaHS(外源H_2S供体)处理,能显著增加叶片内H_2S水平,加快活性氧的清除,从而减轻盐胁迫下的膜脂过氧化程度,促进植物生长。H_2S具有抗氧化作用,外施H_2S可提高植物耐盐性。
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| 关 键 词： | 硫化氢 盐胁迫 氧化胁迫 抗氧化酶 水稻 |
Functional Mechanism of Exogenous H2S to Relieve Salt Stress in Rice |
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| XIE Pingfan,QIU Dongdong,CHEN Zhen.Functional Mechanism of Exogenous H2S to Relieve Salt Stress in Rice[J].Guizhou Agricultural Sciences,2017,45(3). |
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| Authors: | XIE Pingfan QIU Dongdong CHEN Zhen |
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| Abstract: | The effects of exogenous H2S on growth,reactive oxygen species(ROS) and antioxidase system of Oryza sativa L.var Nipponb seedlings at five-leave stage were studied under hydroponic culture and salt stress to verify the function mechanism of exogenous H2S to relieve salt stress in rice.Results:100 mmol/L NaCl inhibits growth of rice seedlings very significantly because of oxidative damage caused by induced reactive oxygen species(ROS).Application of DDC and AT (antioxidant enzymes inhibitors)inhibits scavenging of reactive oxygen species (ROS)under salt stress,which results in high ROS accumulation in leaves and intensifies seedling damage from oxidative stress.Application of 100 μmol/L NaHS (exogenous H2S) can increase H2S level in leaves of rice seedlings under salt stress significantly and speed up scavenging of reactive oxygen species (ROS),which can decrease membrane lipid peroxidation degree and promote growth of rice seedlings.In conclusion,Applying exogenous H2S with an antioxygenation can improve plant salt tolerance. |
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| Keywords: | H2S salt stress oxidative stress antioxidant enzymes rice |
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