盐度
木质部
运输机
拟南芥
功能(生物学)
钠
开枪
生物
机制(生物学)
植物
生物化学
化学
细胞生物学
基因
生态学
物理
有机化学
突变体
量子力学
作者
Felix Hauser,Tomoaki Horie
标识
DOI:10.1111/j.1365-3040.2009.02056.x
摘要
Increasing soil salinity is a serious threat to agricultural productions worldwide in the 21st century. Several essential Na(+) transporters such as AtNHX1 and AtSOS1 function in Na(+) tolerance under salinity stress in plants. Recently, evidence for a new primary salt tolerance mechanism has been reported, which is mediated by a class of HKT transporters both in dicots such as Arabidopsis and monocot crops such as rice and wheat. Here we present a review on vital physiological functions of HKT transporters including AtHKT1;1 and OsHKT1;5 in preventing shoot Na(+) over-accumulation by mediating Na(+) exclusion from xylem vessels in the presence of a large amount of Na(+) thereby protecting leaves from salinity stress. Findings of the HKT2 transporter sub-family are also updated in this review. Subjects regarding function and regulation of HKT transporters, which need to be elucidated in future research, are discussed.
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