| 肖京林 1，覃 美1，凌桂芝 2，黎晓峰 1.植物细胞壁对有害金属与盐分耐受性作用研究进展[J].广东农业科学,2020,47(9):73-80 |
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植物细胞壁对有害金属与盐分耐受性作用研究进展 |
| Advances in Studies on the Resistance of Plant Cell Walls to Harmful Metals and Salt |
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| DOI：10.16768/j.issn.1004-874X.2020.09.010 |
| 中文关键词: 细胞壁 盐分胁迫 果胶 半纤维素 有害金属胁迫 扩展蛋白 |
| 英文关键词: cell wall salt stress pectin hemicellulose harmful metal stress extension protein |
| 基金项目:广西科技重大专项（桂科 2018-266-Z01） |
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| 摘要点击次数: 1522 |
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| 中文摘要: |
| 非生物胁迫对植物正常生长产生影响，而植物细胞壁作为抵抗外界逆境胁迫的第一道屏障，其组分中的果胶、半纤维素、蛋白酶等参与有害金属胁迫的生理应答，果胶能通过带负电的羧基基团与金属离子结合，且通过降低果胶的甲酯化程度从而增加对金属离子的结合能力，减少金属离子向细胞壁的转运；半纤维素同样也能与金属离子结合，其中木葡聚糖在与金属离子结合起着重要作用。细胞壁同样也参与植物盐分胁迫的生理应答，细胞壁扩展蛋白基因的表达会调节植物的盐分耐受性，细胞壁的变化也会被植物所感知并调节植物耐盐性。概述了近年来细胞壁多糖和细胞壁蛋白在植物有害金属与盐分耐受性作用的相关研究进展，以期全面了解植物细胞壁在抗非生物胁迫的作用。 |
| 英文摘要: |
| Abiotic stress has an effect on the normal growth of plants, and the plant cell wall is the first barrier to resist external stress. Pectin, hemicellulose, protease and other components of cell wall participate in the physiological response to stress. The pectin can combine with the metal ions through the negatively charged carboxyl group, and increase the metal ion binding ability to reduce the transhipment of metal ions to cell wall by reducing the level of pectin methyl. Hemicellulose can also combine with metal ions, including wood glucan in combine with metal ions play an important role. The cell wall also participates in the physiological response to plant salt stress. The expression of the cell wall extension protein gene regulates the plant’ s salt tolerance, and the changes in the cell wall are also perceived by the plant and regulate the plant’ s salt tolerance. In this paper, recent studies on the roles of cell wall polysaccharides and cell wall proteins in the tolerance of
harmful metals and salt in plants were reviewed in order to have a comprehensive understanding of the role of plant cell wall in resistance to abiotic stress. |
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