赤霉素介导下植物对重金属的耐性机理

doi:10.19741/j.issn.1673-4831.2019.0689

摘要/Abstract

摘要： 重金属对大多数植物具有毒性，可严重影响植物的正常生理代谢，但植物也进化出缓解重金属胁迫的相关机制，如增强抗氧化系统响应、加快光合效率、调整代谢速率、将重金属区隔化等。赤霉素（GA）是一类经典的植物激素，可调控植物生长发育，增强植物对重金属的耐性，并促进其对重金属的吸收。该研究根据近年来国内外相关文献报道，从重金属胁迫下赤霉素与植物生物量、抗氧化、光合系统修复、重金属区隔化和信号传递的关系等方面，综述了赤霉素介导下植物对重金属的耐性机理，并从重金属胁迫下赤霉素的合成及分解机制、赤霉素提高植物耐受重金属的深入机制、赤霉素在重金属胁迫下植物激素调控网络中的功能以及赤霉素对植物修复效率的影响等方面，对该领域的发展趋势作了展望。

关键词: 赤霉素, 重金属, 非生物胁迫, 耐性, 抗氧化, 光合作用, 区隔化

Abstract: Heavy metals are toxic to most plants and severely interfere with their physiological metabolism. Some adaptive mechanisms, including improved antioxidant response, enhanced photosynthesis rate, adjusted metabolism rate and metal compartmentalization, have been evolved to alleviate the stress of heavy metals. As a classical hormone for regulating the growth and development of plants, gibberellic acid (GA) can enhance the plant tolerance to and uptake of heavy metals. This review summarizes the mechanisms of plant tolerance to heavy metals mediated by gibberellic acid, with an emphasis on plant biomass improvement, antioxidation, remediation of photosynthetic system, metal compartmentalization and signal communication. The future prospects, including the biosynthesis, decomposition as well as regulated roles of GA under heavy metal stress, the in-depth mechanisms of enhanced plant tolerance by GA, and the effects of GA application on phytoremediaiton efficiency, are also proposed.

Key words: gibberellic acid, heavy metal, abiotic stress, tolerance, antioxidation, photosynthesis, compartmentalization

中图分类号:

Q945

张春雨, 王海娟, 王宏镔. 赤霉素介导下植物对重金属的耐性机理[J]. 生态与农村环境学报, 2020, 36(2): 137-144.

ZHANG Chun-yu, WANG Hai-juan, WANG Hong-bin. Mechanisms of Plant Tolerance to Heavy Metals Mediated by Gibberellic Acid[J]. Journal of Ecology and Rural Environment, 2020, 36(2): 137-144.

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