Regulation of Na(+) fluxes in plants.

Regulation of Na(+) fluxes in plants.
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DOI:
10.3389/fpls.2014.00467
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发表时间:
2014
影响因子:
5.6
通讯作者:
Patishtan J
Patishtan J
中科院分区:
生物学2区
文献类型:
--
作者:
Maathuis FJ;Ahmad I;Patishtan J

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当暴露于盐中时,每个植物都从环境中吸收Na+。一旦进入共质体,Na+分布在细胞内和不同的组织和器官之间。在那里,它可以帮助降低细胞水势,但也会产生潜在的毒性作用。因此,Na+通量的控制是至关重要的,事实上,研究表明,耐盐植物和盐敏感植物之间的差异不是由于转运体类型的变化,而是源于对吸收和内部Na+通量的控制。基于Ca2+、环核苷酸、活性氧、激素的信号传导,或基因和蛋白质表达的转录和翻译后变化,已经确定了许多调节机制。本文将对Na+在植物细胞内和细胞间的运动进行综述,并对盐胁迫早期Na+的流动如何受到控制和调节进行综述。
When exposed to salt, every plant takes up Na+ from the environment. Once in the symplast, Na+ is distributed within cells and between different tissues and organs. There it can help to lower the cellular water potential but also exert potentially toxic effects. Control of Na+ fluxes is therefore crucial and indeed, research shows that the divergence between salt tolerant and salt sensitive plants is not due to a variation in transporter types but rather originates in the control of uptake and internal Na+ fluxes. A number of regulatory mechanisms has been identified based on signaling of Ca2+, cyclic nucleotides, reactive oxygen species, hormones, or on transcriptional and post translational changes of gene and protein expression. This review will give an overview of intra- and intercellular movement of Na+ in plants and will summarize our current ideas of how these fluxes are controlled and regulated in the early stages of salt stress.
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