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生态学杂志 ›› 2012, Vol. 31 ›› Issue (08): 2119-2124.

• 研究报告 • 上一篇    下一篇

水蓼对汞积累与分布的水培实验

钱建平1**,江文莹2,3,张力2   

  1. (1桂林理工大学地球科学学院, 广西桂林 541004; 2桂林理工大学环境科学与工程学院, 广西桂林 541004; 3福州南风环境
    科技有限公司, 福州 350001)
  • 出版日期:2012-08-10 发布日期:2012-08-10

Mercury accumulation and distribution in Polygonum hydropiper: A hydroponic experiment.

QIAN Jian-ping1**, JIANG Wen-ying2.3, ZHANG Li2   

  1. (1College of Earth Science, Guilin University of Technology, Guilin 541004, Guangxi, China; 2College of Environmental Science and Engineering, Guilin University of Technology, Guilin 541004, Guangxi, China; 3Fuzhou Nanfeng Environmental Science and Technology Company, Fuzhou 350001, China).
  • Online:2012-08-10 Published:2012-08-10

摘要: 通过水培实验,研究不同浓度的汞(0、0.5、1、10、20和50 μg·L-1)对水蓼生长的影响及水蓼的耐受性表现。结果表明:在所处理的浓度范围内,水蓼生长与生理表现未受影响。水蓼根部具有最强的汞富集能力,富集系数高达531.5%。培养液中的汞浓度与水蓼茎、叶和根中汞的富集量呈显著正相关。在同一浓度时,随着培养时间的增长,水蓼体内汞含量不断增加。水蓼茎、叶和根亚细胞中的汞分布规律表现为:细胞壁>细胞器>细胞液,细胞壁对进入植物体内的汞有很强的束缚作用,限制其进入细胞质内部。  

关键词: 南方菟丝子, 寄生, 防御, 生物防治, 外来入侵植物

Abstract: A hydroponic experiment was conducted to study the growth and tolerance performance of Polygonum hydropiper exposed to different concentration mercury (0, 0.5, 1, 10, 20, and 50 μg·L-1). In all treatments, the growth and physiological performances of P. hydropiper were not affected. The root tissue of P. hydropiper had the greatest accumulation of mercury, with the enrichment coefficient being 531.5%. The mercury accumulation in P. hydropiper stem, leaf, and root was significantly positively correlated with the mercury concentration in culture solution. Under a given mercury concentration, the mercury level in P. hydropiper plants increased with culture time. The subcellular mercury concentration in the stem, leaf, and root was in the order of cytoderm > cytoplasmic organelles > cytolymph. Due to the strong mercury-binding effect of cytoderm, the mercury translocation from cytoderm to cytoplasmic organelles and cytolymph was limited.  

Key words: Cuscuta australis, parasitism, defense, biological control, invasive plant.