Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (10): 191-199.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0385

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Advances of Bryophytes in Response to Heavy Metal Stress

CHEN Xuan1(), LIU Xiang-long1, TANG Ting1,2()   

  1. 1. School of Life Sciences,Hunan University of Science and Technology,Xiangtan 411201
    2. Hunan Key Laboratory of Economic Crops Genetic Improvement and Integrated Utilization,Hunan University of Science and Technology,Xiangtan 411201
  • Received:2020-04-05 Online:2020-10-26 Published:2020-11-02
  • Contact: TANG Ting E-mail:310480416@qq.com;tangting@hnust.edu.cn

Abstract:

With more and more serious heavy metal pollution from intensifying human activities,the phytoremediation technology for heavy metal contaminated soil has become a research hotspot due to the advantages of low cost,environmental friendliness and high remediation efficiency. However,the research in this field mainly focuses on angiosperms. Bryophytes possess special physiological structures and development processes,including the leaf composed of single cell layer,the underdeveloped stratum corneum but relative large body surface area,and strong electrostatic adsorption capacity,which enable them to adapt well to environmental heavy metal stress. This paper reviewed the impact of heavy metal stress on bryophytes as well as their stress responses,and proposed that mechanisms contributing to heavy metal tolerance might be conserved between bryophytes and other terrestrial higher plants,aiming at providing the ideal materials for the ecological restoration and biological monitoring of heavy metal polluted area.

Key words: bryophytes, heavy metal stress, photosynthetic system, phytochelatin, ecological restoration