Cd2+、Cu2+、Zn2+、Pb2+对菹草生长胁迫影响及其应答机制
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Stress Effect and Response Mechanism of Cd2+,Cu2+,Zn2+ and Pb2+ on Potamogeton crispus L. Growth
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    摘要:

    为探求不同浓度的Cd2+、Cu2+、Zn2+、Pb2+对菹草(石芽)的生长发育的胁迫及其应答机制,对菹草(石芽)的生长状况、叶片的叶绿素、可溶性蛋白质、丙二醛(MDA)含量、抗氧化酶系统等进行了分析。结果如下:Cu2+、Cd2+质量浓度大于0.5 mg/L,植株无法正常生长或存活;Cu2+胁迫下,植株受损程度相对严重。Zn2+、Pb2+质量浓度小于10 mg/L时,菹草仍可以正常生长,但Pb2+胁迫程度比Zn2+较轻。综上,在相同质量浓度下,4种重金属对菹草(石芽)的胁迫强弱依次为Cu2+、Cd2+、Zn2+、Pb2+。本研究为生态修复中水生植物的金属阈值提供了有价值的参考。

    Abstract:

    To estimate the influence of different heavy metals to the Potamogeton crispus L.,especially the growth and development of its winter buds,the stresses of Cd2+,Cu2+,Zn2+ and Pb2+ in different concentrations to the growth and development of winter buds of Potamogeton crispus L. were studied,through the quantitative determination of germinated number of winter buds,chlorophyll of the leaves,soluble protein,malondialdehyde(MDA),and antioxidant system. As a result,under the same concentrations,Cu2+ had the most obvious effect on physiological and biochemical indexes of the plant. The Cd2+ ranked the second and followed by Pb2+ and Zn2+. The plants cannot grow normally or even survive with concentration of Cu2+ or Cd2+ higher than 0.5 mg/L. At the same time,the plants can grow normally under 10 mg/L of Zn2+ or Pb2+ treatment,which provided effective basis for aquatic plant in the metal threshold for ecological repair.

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李婉璐,张光生,成小英. Cd2+、Cu2+、Zn2+、Pb2+对菹草生长胁迫影响及其应答机制[J].食品与生物技术学报,2016,35(9):1001-1007.

LI Wanlu, ZHANG Guangsheng, CHENG Xiaoying. Stress Effect and Response Mechanism of Cd2+,Cu2+,Zn2+ and Pb2+ on Potamogeton crispus L. Growth[J]. Journal of Food Science and Biotechnology,2016,35(9):1001-1007.

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  • 在线发布日期: 2016-11-01
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