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Vacuolar Transporters in Their Physiological Context

Journal

ANNUAL REVIEW OF PLANT BIOLOGY, VOL 63
Volume 63, Issue -, Pages 183-213

Publisher

ANNUAL REVIEWS
DOI: 10.1146/annurev-arplant-042811-105608

Keywords

anions; carbohydrates; cations; heavy metals; secondary metabolites

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Vacuoles in vegetative tissues allow the plant surface to expand by accumulating energetically cheap inorganic osmolytes, and thereby optimize the plant for absorption of sunlight and production of energy by photosynthesis. Some specialized cells, such as guard cells and pulvini motor cells, exhibit rapid volume changes. These changes require the rapid release and uptake of ions and water by the vacuole and are a prerequisite for plant survival. Furthermore, seed vacuoles are important storage units for the nutrients required for early plant development. All of these fundamental processes rely on numerous vacuolar transporters. During the past 15 years, the transporters implicated in most aspects of vacuolar function have been identified and characterized. Vacuolar transporters appear to be integrated into a regulatory network that controls plant metabolism. However, little is known about the mode of action of these fundamental processes, and deciphering the underlying mechanisms remains a challenge for the future.

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