植物HKT蛋白耐盐机制研究进展
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摘要
盐害是限制植物生长发育的重要环境因素,对植物造成渗透胁迫和离子毒害。维持细胞及整株水平的Na~+/K~+平衡是植物重要的耐盐机制。目前,已报道的高亲和性钾离子转运蛋白(HKT)具有钠、钾离子转运特性,在植物体钠、钾离子长距离运输及分配过程中发挥重要作用。该文重点总结了淡土植物和盐土植物HKT蛋白的结构、功能及耐盐机理,并对其在植物耐盐改良育种中的前景做出了展望。
Soil salinity affects the growth of plant species, which can cause osmotic stress and ionic toxicity in the plants. Therefore, it is crucial to maintain Na+/K+ homeostasis at the cellular and whole plant levels for plant salt tolerance. The high-affinity potassium transporters(HKTs) were found to have a ability to transport and distribute Na+ and K+ in plants. Here we summarize the advance about the structure and function of the HKT proteins from glycophytes and halophytes. Further discussion is directed to genetically modified and artificially designed transport proteins for genetic engineering of salt-tolerant plants.
Soil salinity affects the growth of plant species, which can cause osmotic stress and ionic toxicity in the plants. Therefore, it is crucial to maintain Na+/K+ homeostasis at the cellular and whole plant levels for plant salt tolerance. The high-affinity potassium transporters(HKTs) were found to have a ability to transport and distribute Na+ and K+ in plants. Here we summarize the advance about the structure and function of the HKT proteins from glycophytes and halophytes. Further discussion is directed to genetically modified and artificially designed transport proteins for genetic engineering of salt-tolerant plants.
引文
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