| 环境胁迫对水生植物根系分泌小分子量有机酸(LMWOAs)的影响特征 |
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| 引用本文： | 张治宏,杨诗卡,韩超,许笛,王兆德,柯凡,申秋实.环境胁迫对水生植物根系分泌小分子量有机酸(LMWOAs)的影响特征[J].湖泊科学,2020,32(2):462-471. |
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| 作者姓名： | 张治宏 杨诗卡 韩超 许笛 王兆德 柯凡 申秋实 |
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| 作者单位： | 西安工业大学建筑工程学院,西安710021;西安工业大学建筑工程学院,西安710021;中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,南京210008;中国科学院南京地理与湖泊研究所,湖泊与环境国家重点实验室,南京210008 |
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| 基金项目： | 国家水体污染控制与治理科技重大专项（2017ZX07603002，2017ZX07603004）和国家自然科学基金项目（41773087）联合资助. |
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| 摘 要： | 本文首次对马来眼子菜(Potamogeton malaianus)、苦草(Vallisneria natans)、芦苇(Phragmites australis)、菖蒲(Acorus calamus)、荇菜(Nymphoides peltatum)和菱角(Trapa incisa) 6种水生植物根系小分子量有机酸(Low Molecular Weight Organic Acids,LMWOAs)分泌差异性及其对环境胁迫(温度、缺磷和高铵态氮)响应特征进行研究结果证实6种受试植物根系分泌LMWOAs组成和含量具有明显的物种差异性;其中,甲酸、乳酸和草酸为主要有机酸温度可显著影响水生植物根系LMWOAs分泌量而对种类影响不大,高温(30℃)刺激莕菜根系LMWOAs分泌量增加,但却明显抑制苦草和菖蒲根系LMWOAs分泌; 25℃时马来眼子菜、芦苇和菱角根系LMWOAs分泌量最多缺磷和高铵态氮胁迫均会显著影响水生植物根系LMWOAs分泌量和种类缺磷胁迫促进苦草、菖蒲和莕菜根系LMWOAs分泌量增加68.68%、55.30%和257.82%,并刺激乙酸和苹果酸等有机酸分泌;而缺磷胁迫可导致马来眼子菜、芦苇和菱角根系LMWOAs分泌量降低38.72%、13.79%和58.99%,且乳酸、甲酸和丁二酸分泌完全被抑制;这表明苦草、菖蒲和莕菜三者能较好的适应缺磷环境高铵态氮胁迫下苦草根系LMWOAs分泌量和种类增加明显;而其余5种受试植物在高铵态氮胁迫下根系LMWOAs分泌量被明显抑制,尤其是乳酸、苹果酸和酒石酸含量显著降低综上所述,水生植物分泌LMWOAs特征差异性显著,可在一定程度上反映其耐逆境胁迫能力,本文结果将为水生植物生态修复机理和实践提供重要理论依据.
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| 关 键 词： | 根系分泌物 小分子量有机酸 水生植物 环境胁迫 |
| 收稿时间： | 2019/6/3 0:00:00 |
| 修稿时间： | 2019/10/14 0:00:00 |
Effects of environmental stress on characteristics of low molecular weight organic acids secreted by macrophyte roots |
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| ZHANG Zhihong,YANG Shik,HAN Chao,XU Di,WANG Zhaode,KE Fan and SHEN Qiushi.Effects of environmental stress on characteristics of low molecular weight organic acids secreted by macrophyte roots[J].Journal of Lake Science,2020,32(2):462-471. |
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| Authors: | ZHANG Zhihong YANG Shik HAN Chao XU Di WANG Zhaode KE Fan and SHEN Qiushi |
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| Institution: | School of Civil&Architecture Engineering, Xi''an Technological University, Xi''an 710021, P. R. China,School of Civil&Architecture Engineering, Xi''an Technological University, Xi''an 710021, P. R. China;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China,State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China,State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China,State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China,State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China and State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, P. R. China |
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| Abstract: | |
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| Keywords: | Root exudation LMWOAs aquatic macrophyte environmental stress |
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