4.5 Article Proceedings Paper

Modulating the expression of aquaporin genes in planta: A key to understand their physiological functions?

期刊

BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES
卷 1758, 期 8, 页码 1142-1156

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ELSEVIER
DOI: 10.1016/j.bbamem.2006.02.017

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aquaporin; water relation; membrane permeability; hydraulic conductivity

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Aquaporins (AQPs) are believed to act as cellular plumbers, allowing plants to rapidly alter their membrane water permeability in response to environmental cues. This study of AQP regulation at both the RNA and protein levels has revealed a large number of possible mechanisms. Currently, modulation of AQP expression in planta is considered the strategy of choice for elucidating the role of AQPs in plant physiology. This review highlights the fact that this strategy is complicated by many factors, such as the incomplete characterization of transport selectivity of the targeted AQP, the fact that AQPs might act as multifunctional channels with multiple physiological roles, and the number of post-translational regulation mechanisms. The classification of AQPs as constitutive or stress-responsive isoforms is also proposed. (c) 2006 Elsevier B.V. All rights reserved.

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