Journal
GENETICS AND MOLECULAR BIOLOGY
Volume 40, Issue 1, Pages 326-345Publisher
SOC BRASIL GENETICA
DOI: 10.1590/1678-4685-GMB-2016-0106
Keywords
Salinity; sodium; potassium; proton pumps; ion transporters
Funding
- Fundacao para a Ciencia e Tecnologia (FCT) [SFRH/BD/65229/2009]
- FCT Investigator - POPH (QREN)
- Programa Ciencia
- Research unit GREEN-it Bioresources for Sustainability [UID/Multi/04551/2013]
- FCT [PTDC/BIA_BCM/099836/2008]
- Fundação para a Ciência e a Tecnologia [PTDC/BIA-BCM/099836/2008, SFRH/BD/65229/2009] Funding Source: FCT
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Soil salinity is a major abiotic stress that results in considerable crop yield losses worldwide. However, some plant genotypes show a high tolerance to soil salinity, as they manage to maintain a high K+/Na+ ratio in the cytosol, in contrast to salt stress susceptible genotypes. Although, different plant genotypes show different salt tolerance mechanisms, they all rely on the regulation and function of K+ and Na+ transporters and H+ pumps, which generate the driving force for K+ and Na+ transport. In this review we will introduce salt stress responses in plants and summarize the current knowledge about the most important ion transporters that facilitate intra-and intercellular K+ and Na+ homeostasis in these organisms. We will describe and discuss the regulation and function of the H+-ATPases, H+-PPases, SOS1, HKTs, and NHXs, including the specific tissues where they work and their response to salt stress.
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