植物HKT蛋白耐盐机制研究进展

doi:10.11983/CBB17230

植物学报 ›› 2018, Vol. 53 ›› Issue (5): 710-725.DOI: 10.11983/CBB17230

植物HKT蛋白耐盐机制研究进展

王甜甜^1,², 郝怀庆¹, 冯雪¹, 景海春^1,^3,^4,^*()

¹中国科学院植物研究所, 资源植物重点实验室, 北京 100093
²东营市园林局, 东营 257091
³中国科学院内蒙古草业研究中心, 呼和浩特 150100
⁴中国科学院大学, 北京 100039

收稿日期:2017-11-29 接受日期:2018-05-01 出版日期:2018-09-01 发布日期:2018-11-29
通讯作者: 景海春
作者简介:
† 共同第一作者。
基金资助:
国家自然科学基金(No.31301326)

Research Advances in the Function of the High-affinity K⁺ Transporter (HKT) Proteins and Plant Salt Tolerance

Wang Tiantian^1,², Hao Huaiqing¹, Feng Xue¹, Jing Haichun^1,^3,^4,^*()

¹Key Laboratory of Plant Resources, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
²Dongying Landscape and Greening Department, Dongying 257091, China
³Inner Mongolia Research Center for Prataculture, Chinese Academy of Sciences, Huhehaote 150100, China
⁴University of Chinese Academy of Sciences, Beijing 100039, China

Received:2017-11-29 Accepted:2018-05-01 Online:2018-09-01 Published:2018-11-29
Contact: Jing Haichun
About author:
† These authors contributed equally to this paper

1. 植物HKT蛋白耐盐机制研究进展附录.pdf(90KB)

摘要/Abstract

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。

关键词: HKT, 离子平衡, 耐盐机制, 转运蛋白

Abstract: 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.

Key words: HKT, ion homeostasis, salt tolerance, transport protein

王甜甜, 郝怀庆, 冯雪, 景海春. 植物HKT蛋白耐盐机制研究进展. 植物学报, 2018, 53(5): 710-725.

Wang Tiantian, Hao Huaiqing, Feng Xue, Jing Haichun. Research Advances in the Function of the High-affinity K⁺ Transporter (HKT) Proteins and Plant Salt Tolerance. Chinese Bulletin of Botany, 2018, 53(5): 710-725.

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链接本文: https://www.chinbullbotany.com/CN/10.11983/CBB17230

https://www.chinbullbotany.com/CN/Y2018/V53/I5/710

图/表 2

图1 植物跨膜转运蛋白维持Na+/K+平衡的作用模型实线箭头代表钠、钾离子转运方向; 虚线箭头代表SOS1和NHX1逆向转运蛋白的H+转运方向。

Figure 1 Diagram of the proposed working model for transmembrane transporters in regulating Na+/K+ homeostasisThe arrows in solid lines indicate the direction of Na+ and K+ flux, while dashed arrows indicate the direction of flux of protons (in the case of NHX1 or SOS1).

图2 植物HKT蛋白家族最小进化关系聚类树(MEGA7)氨基酸序列登录号见附录1。

Figure 2 An un-rooted minimum-evolution phylogenetic tree of protein sequences of HKT homologues (MEGA7)The amino acid sequences are in Appendix 1.

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植物HKT蛋白耐盐机制研究进展

Research Advances in the Function of the High-affinity K⁺ Transporter (HKT) Proteins and Plant Salt Tolerance

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Research Advances in the Function of the High-affinity K⁺ Transporter (HKT) Proteins and Plant Salt Tolerance