| 菹草对铵氮和硝氮急性胁迫的响应 |
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| 引用本文： | 马剑敏,靳同霞,贺锋,成水平,赵强,吴娟,吴振斌. 菹草对铵氮和硝氮急性胁迫的响应[J]. 环境科学与技术, 2009, 32(5) |
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| 作者姓名： | 马剑敏 靳同霞 贺锋 成水平 赵强 吴娟 吴振斌 |
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| 作者单位： | 河南师范大学生命科学学院,河南省环境污染控制重点实验室,河南,新乡,453007;中国科学院水生生物研究所,湖北,武汉,430072 |
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| 基金项目： | 国家重大科技专项项目，河南省科技攻关项目，淡水生态与生物技术国家重点实验室开放项目 |
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| 摘 要： | 利用水族箱研究了在单一的铵氮和硝氮急性胁迫下.3d内菹草的现存量、生产力、叶绿素与可溶性蛋白质含量以及SOD和POD活性的变化特点.结果表明:铵氮胁迫下,菹草现存量增加百分比与铵氮浓度间显著负相关;铵氮＞1.56mg/L时,菹草现存量、生产力、可溶性蛋白含量开始明显下降.生长受到抑制;叶绿素含量在胁迫6h时无明显变化,在高浓度的铵氮胁迫24和72h时,含量明显下降;随着胁迫时间延长,SOD活性明显升高时对应的胁迫浓度越来越低,而在高浓度的铵氮胁迫下,活性明显下降;POD活性随着胁迫浓度的提高,在6、24和72h时,均先升后降.在0～200mg/L的硝氮胁迫下.菹草现存量先升后降,但其最低值与对照无明显差异;随着胁迫浓度增加,蛋白质含量在胁迫6h时无明显变化,24和72h时先升后降;叶绿素含量无明显变化,SOD活性持续升高;POD活性除在＞25mg/L的硝氮作用72h时下降外,均随硝氮浓度增加而增加.总生产力在硝氮≤100mg/L时无明显下降.NH4-对菹草的毒性远大于NO3-.
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| 关 键 词： | 菹草 铵氮 硝氮 急性胁迫 |
Response of Potamogeton crispus to Acute Stress of NH_4~+-N or NO_3~--N |
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| MA Jian-min,JIN Tong-xia,HE Feng,CHENG Shui-ping,ZHAO Qiang,WU Juan,WU Zhen-bin. Response of Potamogeton crispus to Acute Stress of NH_4~+-N or NO_3~--N[J]. Environmental Science and Technology, 2009, 32(5) |
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| Authors: | MA Jian-min JIN Tong-xia HE Feng CHENG Shui-ping ZHAO Qiang WU Juan WU Zhen-bin |
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| Affiliation: | 1.Henan Key Laboratory for Environmental Pollution Control;School of Life Science;Henan Normal University;Xinxiang 453007;China;2.Institute of Hydrobiology;Chinese Academy of Sciences;Wuhan 430072;China |
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| Abstract: | Characteristics were studied for the standing crops,productivities,soluble protein content,SOD and POD activities of Potamogeton crispus changed under the stress of NH4+-N or NO3--N in aquaria within 3 days.Results showed that the increased percent of standing crop of P.crispus was in negative correlation to the concentration of NH4+-N under the stress of NH4+-N.When NH4+-N was above 1.56mg/L,the standing crop,productivity and soluble protein content began to decrease,the growth of P.crispus was inhibited.W... |
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| Keywords: | Potamogeton crispus NH4+-N NO3--N acute stress |
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