Alternative TitleThe response of the photosynthesis and antioxidant enzyme activities in Phragmites australis to S2- and Na+ stress
陈琳; 张俪文; 刘子亭; 路峰; 颜坤; 韩广轩
Source Publication生态科学
Keyword黄河三角洲 盐胁迫 芦苇 光合作用 抗氧化酶活性
Contribution Rank(1) 聊城大学环境与规划学院; (2) 中国科学院海岸带环境过程与生态修复重点实验室(烟台海岸带研究所)山东省海岸带环境过程重点实验室中国科学院烟台海岸带研究所; (3) 山东黄河三角洲国家级自然保护区管理委员会
AbstractThe soil sulfur content and Na+ are very high in the tidal wetland. The physiological ecological response of P. australis to S2–stress and S2– & Na+ joint stress is unclear. Using P. australis from the high tidal marsh in the Yellow River Delta as experimental materials, two comparison experiments were conducted(The same S2– concentration: 50 mmol·L–1 Na2 S VS. K2 S; The same Na+ concentration: 40 mmol·L–1 Na2 S VS. 80 mmol·L–1 NaCl). The effects of S2-, Na+ and their joint stress on photosynthesis and antioxidant enzyme activities were compared. The results showed that: Na)2 S inhibited the photosynthetic rate more strongly than the K2 S and NaCl, and thus the joint effect of S2– and Na+ stress was more serious than their single effect. Furthermore, for the antioxidant enzyme activities, under 50 mmol·L–1 Na2 S stress, the activities of H2 O2, POD and SOD were higher than the control treatment, thus POD and SOD played an important role in resisting Na2 S stress. Overall, the coexistence of S2– and Na+ depressed the P. australis more severely, and POD and SOD played an important role in resisting S2- and Na+ stress.
Other Abstract潮汐湿地的土壤硫含量和钠离子含量很高,然而该生境中的S~(2-)以及S~(2-)与Na~+联合胁迫对植物生理生态影响认识不足。以黄河三角洲高潮滩芦苇为材料,进行了对比实验(S~(2-)浓度相同处理:50 mmol·L~(-1) Na_2S VS.50 mmol·L~(-1)K_2S处理;Na~+离子浓度相同处理:40 mmol·L~(-1) Na_2S VS.80 mmol·L~(-1) NaCl处理),研究了S~(2-)、Na~+的联合胁迫以及它们的单独胁迫对芦苇的光合作用及抗氧化酶活性的影响差异。结果表明:Na_2S比K_2S和NaCl处理对芦苇光合速率的抑制作用更显著,因此S~(2-)和Na~+的联合胁迫比它们的单独胁迫作用更强。对于抗氧化酶活性,50 mmol·L~(-1) Na_2S处理后过氧化氢(H_2O_2)、过氧化物酶(POD)、超氧化物歧化酶(SOD)浓度显著升高,说明在抵御S~(2-)和Na~+离子胁迫时,POD和SOD发挥重要的作用,而在Na_2S处理下,过氧化氢酶(CAT)则呈显著下降的趋势。总之,硫和钠离子的同时存在严重抑制高潮滩芦苇的光合速率,而POD和SOD、CAT对于抵御S~(2-)和Na~+胁迫起到重要的作用。
Funding Organization国家自然科学基金项目(31670533) ; 中国科学院青年创新促进会项目(2018247)
Indexed ByCSCD
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Document Type期刊论文
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陈琳,张俪文,刘子亭,等. S~(2-)和Na~+胁迫下黄河三角洲高潮滩芦苇光合作用和抗氧化酶活性的响应[J]. 生态科学,2020,39(02):175-181.
APA 陈琳,张俪文,刘子亭,路峰,颜坤,&韩广轩.(2020).S~(2-)和Na~+胁迫下黄河三角洲高潮滩芦苇光合作用和抗氧化酶活性的响应.生态科学,39(02),175-181.
MLA 陈琳,et al."S~(2-)和Na~+胁迫下黄河三角洲高潮滩芦苇光合作用和抗氧化酶活性的响应".生态科学 39.02(2020):175-181.
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