HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants.

HKT transporter-mediated salinity resistance mechanisms in Arabidopsis and monocot crop plants.
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DOI:
10.1016/j.tplants.2009.08.009
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发表时间:
2009-12
影响因子:
20.5
通讯作者:
Schroeder, Julian I.
Schroeder, Julian I.
中科院分区:
生物学1区
文献类型:
--
作者:
Horie, Tomoaki;Hauser, Felix;Schroeder, Julian I.

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灌溉土地的盐碱化对植物生物量生产和农业生产力越来越有害,因为大多数植物物种对高浓度的钠(Na+)敏感,这会导致Na+毒性和渗透胁迫的组合。植物具有多种Na+转运系统以规避Na+毒性。拟南芥中主要的Na+转运蛋白(包括SOS 1、AtNHX和AtHKT 1;1转运蛋白)的生理功能及其介导耐盐性的机制已被确定。正如我们在这里讨论的,最近的研究表明,一类木质部薄壁组织表达的Na+渗透植物HKT转运蛋白代表了介导拟南芥耐盐性和Na+排斥的主要机制,单子叶作物植物中的主要耐盐QTL也是基于这种HKT介导的机制。植物的钠毒与耐盐性
The salinization of irrigated lands is increasingly detrimental to plant biomass production and agricultural productivity as most plant species are sensitive to high concentrations of sodium (Na+), which causes combined Na+ toxicity and osmotic stress. Plants have multiple Na+ transport systems to circumvent Na+ toxicity. Essential physiological functions of major Na+ transporters and their mechanisms mediating salinity resistance have been identified in Arabidopsis, including the SOS1, AtNHX and AtHKT1;1 transporters. As we discuss here, recent studies have demonstrated that a class of xylem–parenchyma-expressed Na+-permeable plant HKT transporters represent a primary mechanism mediating salt tolerance and Na+ exclusion from leaves in Arabidopsis, and that major salt tolerance QTL in monocot crop plants are also based on this HKT-mediated mechanism. Sodium toxicity and salt tolerance in plants
DOI: 10.1093/oxfordjournals.molbev.a026334
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