苔藓植物响应重金属胁迫的研究进展

doi:10.13560/j.cnki.biotech.bull.1985.2020-0385

摘要/Abstract

摘要：

随着人类活动加剧,重金属污染形势越来越严峻,重金属污染土壤的植物修复技术由于其成本低、环境友好且修复效率高等优点已然成为研究热点,然而此领域研究基本集中在被子植物。苔藓植物叶片仅单层细胞构成,角质层不发达但相对体表面积较大,有较好的静电吸附能力,其特殊生理构造和发育过程决定了其对环境重金属胁迫具有超强适应性。综述了重金属胁迫对苔藓植物的影响以及苔藓植物在各个水平对重金属胁迫的响应,并提出了苔藓植物在耐重金属胁迫机制上与其他陆生高等植物具有保守性,以期为重金属污染地区进行生态修复提供理想材料和生物监测方法。

关键词: 苔藓, 重金属胁迫, 光合系统, 螯合剂, 生态修复

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

陈璇, 刘祥龙, 唐婷. 苔藓植物响应重金属胁迫的研究进展[J]. 生物技术通报, 2020, 36(10): 191-199.

CHEN Xuan, LIU Xiang-long, TANG Ting. Advances of Bryophytes in Response to Heavy Metal Stress[J]. Biotechnology Bulletin, 2020, 36(10): 191-199.

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