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| Molecular and Microbial Mechanisms of Plant Response to Copper Stress |
| ZHANG Jing1, WANG Jian-Feng3, GONG Ji-Yi1,2, WANG Li1, CHEN Xian-Lei1, CHEN Lan-Lan1, LI Na1, LIU Jie1,2, YI Yin1,2,* |
1 School of Life Sciences, Guizhou Normal University, Guiyang 550001, China;
2 Key Laboratory of National Forestry and Grassland Administration for Biodiversity Conservation of Southwest Karst Mountains, Guizhou Normal University, Guiyang 550001, China;
3 State Key Laboratory of Herbage Improvement and Grassland Agroecosystems/Center for Grassland Microbiome, Lanzhou University, Lanzhou 730000, China |
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Abstract At present, soil heavy metal pollution has become a global major environmental issue. Copper (Cu) is an essential trace element for plants, but high concentrations of copper have toxic effects on plants. In order to adapt to copper stress environments, plants have developed various copper-tolerant molecular and microbiological mechanisms. This article introduces the role of hyperaccumulating plants in copper-contaminated soil, systematically outlining the morphological, physiological, molecular, and rhizospheric microbiological mechanisms of plant responses to copper stress, including the following: The physiological defense and absorption transport mechanisms of plants against copper; Plant growth promoting rhizobacteria (PGPR) enhancing plant tolerance to copper stress by promoting plant nutrient absorption and secreting growth-regulating substances; PGPR reducing copper damage to plants by inducing systemic resistance and adsorbing accumulated copper ions; The mechanisms of plant responses to copper stress mediated by rhizospheric microbial community structure and function; And the changes in rhizospheric microbial community structure in response to different copper stresses. This article provides scientific support for the future breeding of copper-tolerant plant germplasm and the management and restoration of copper-contaminated soil.
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Received: 26 December 2023
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Corresponding Authors:
* yiyin@gznu.edu.cn
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