| 重金属镉对拟柱孢藻(Cylindrospermopsis raciborskii)PSII及能量分配特征的影响效应 |
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| 引用本文： | 贺新宇,刘黎,付君珂,杨燕君,米文梅,施军琼,吴忠兴.重金属镉对拟柱孢藻(Cylindrospermopsis raciborskii)PSII及能量分配特征的影响效应[J].湖泊科学,2019,31(6):1612-1622. |
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| 作者姓名： | 贺新宇 刘黎 付君珂 杨燕君 米文梅 施军琼 吴忠兴 |
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| 作者单位： | 西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715;西南大学三峡库区生态环境教育部重点实验室,重庆市三峡库区植物生态与资源重点实验室,重庆400715 |
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| 基金项目： | 国家自然科学基金项目（41877410）和中央高校基本科研业务费专项资金项目（XDJK2017B010，XDJK2019C044）联合资助. |
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| 摘 要： | 为了研究重金属镉对藻类光合系统毒性效应及能量分配特征,以拟柱孢藻(Cylindrospermopsis raciborskii)为研究对象,分析了不同镉浓度下拟柱孢藻的生长、单位叶绿素a含量、光合系统Ⅱ(PSⅡ)叶绿素荧光及其能量分配模型.结果表明:不同浓度镉培养拟柱孢藻96 h后,0.2 mg/L Cd~(2+)对拟柱孢藻单位细胞叶绿素a含量及PSⅡ活性无显著影响,而0.5mg/L Cd~(2+)培养时拟柱孢藻的单位细胞叶绿素a含量为对照组的62.97%.当Cd~(2+)浓度高于5 mg/L时,拟柱孢藻的PSⅡ活性受到抑制并导致表征量子产额分配的φEo和ψo分别下降了15.35%和13.52%.此外,当Cd~(2+)浓度高于5 mg/L时,藻体PSⅡ能量分配表现为TRO/CSm和ETO/CSm显著减小,DIO/CSm差异不显著,类囊体能量分配表现为ABS/RC、TRO/RC和DIO/RC显著增大,明显区别于0.2、0.5和1 mg/L Cd~(2+)处理组.这些结果表明PSⅡ反应中心是镉对拟柱孢藻光合作用影响的重要作用位点,且Cd~(2+)高于5 mg/L时显著影响了拟柱孢藻PSⅡ反应中心并且抑制了PSⅡ电子传递链供体侧的电子传递,而拟柱孢藻则可能通过改变PSⅡ的能量分配来保护和缓解镉对其光合结构的损伤.
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| 关 键 词： | 拟柱孢藻 镉 光合系统Ⅱ 能量分配 毒性效应 |
| 收稿时间： | 2019/3/13 0:00:00 |
| 修稿时间： | 2019/4/22 0:00:00 |
Toxic effects and energy distribution characteristics of photosynthetic system II(PSII) in Cylindrospermopsis raciborskii exposed to heavy metal cadmium |
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| HE Xinyu,LIU Li,FU Junke,YANG Yanjun,MI Wenmei,SHI Junqiong and WU Zhongxing.Toxic effects and energy distribution characteristics of photosynthetic system II(PSII) in Cylindrospermopsis raciborskii exposed to heavy metal cadmium[J].Journal of Lake Science,2019,31(6):1612-1622. |
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| Authors: | HE Xinyu LIU Li FU Junke YANG Yanjun MI Wenmei SHI Junqiong and WU Zhongxing |
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| Institution: | Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China,Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China and Key Laboratory of Eco-environments in Three Gorges Reservoir Region(Ministry of Education), Chongqing Key Laboratory of Plant Ecology and Resources Research in Three Gorges Reservoir Region, Southwest University, Chongqing 400715, P. R. China |
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| Abstract: | |
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| Keywords: | Cylindrospermopsis raciborskii cadmium PSII energy distribution toxic effects |
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