Journal
FRONTIERS IN PLANT SCIENCE
Volume 3, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2012.00011
Keywords
anion/H+ exchanger; cation/H+ exchanger; CHX gene family; pH homeostasis; H+ transport; NHX gene family; secretory pathway; V-ATPase
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Intracellular pH homeostasis is an essential process in all plant cells. The transport of H+ into intracellular compartments is critical for providing pH regulation. The maintenance of correct luminal pH in the vacuole and in compartments of the secretory/endocytic pathway is important for a variety of cellular functions including protein modification, sorting, and trafficking. It is becoming increasingly evident that coordination between primary H+ pumps, most notably the V-ATPase, and secondary ion/H+ exchangers allows this endomembrane pH maintenance to occur. This article describes some of the recent insights from the studies of plant cation/H+ exchangers and anion/H+ exchangers that demonstrate the fundamental roles of these transporters in pH homeostasis within intracellular compartments.
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