Regulation of Na+ fluxes in plants

作者：Frans J. M. Maathuis, Izhar Ahmad, Juan Patishtan-Pérez · 发表于：Frontiers in Plant Science · 年份：2014 · DOI：10.3389/fpls.2014.00467 · 被引用次数：245 · 研究领域：Plant nutrient uptake and metabolism、Plant Stress Responses and Tolerance、Plant responses to water stress

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 Ca(2+), 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.