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Aquaporin Activity to Improve Crop Drought Tolerance

Plant Sciences Department, University of Tennessee, West TN Research & Education Center, Jackson, TN 38301-3201, USA
Crop and Soil Sciences Department, North Carolina State University, Raleigh, NC 27695-7620, USA
Author to whom correspondence should be addressed.
Cells 2018, 7(9), 123;
Received: 29 June 2018 / Revised: 22 August 2018 / Accepted: 27 August 2018 / Published: 29 August 2018
(This article belongs to the Special Issue Aquaporins)
In plants, aquaporins (AQP) occur in multiple isoforms in both plasmalemma and tonoplast membranes resulting in regulation of water flow in and out of cells, and ultimately, water transfer through a series of cells in leaves and roots. Consequently, it is not surprising that physiological and molecular studies have identified AQPs as playing key roles in regulating hydraulic conductance in roots and leaves. As a result, the activity of AQPs influences a range of physiological processes including phloem loading, xylem water exit, stomatal aperture and gas exchange. The influence of AQPs on hydraulic conductance in plants is particularly important in regulating plant transpiration rate, particularly under conditions of developing soil water-deficit stress and elevated atmospheric vapor pressure deficit (VPD). In this review, we examine the impact of AQP activity and hydraulic conductance on crop water use and the identification of genotypes that express soil water conservation as a result of these traits. An important outcome of this research has been the identification and commercialization of cultivars of peanut (Arachis hypogaea L.), maize (Zea mays L.), and soybean (Glycine max (Merr) L.) for dry land production systems. View Full-Text
Keywords: aquaporins (AQPs); water deficit stress; high vapor pressure deficit (VPD); limited-transpiration (TRlim) trait aquaporins (AQPs); water deficit stress; high vapor pressure deficit (VPD); limited-transpiration (TRlim) trait
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MDPI and ACS Style

Shekoofa, A.; Sinclair, T.R. Aquaporin Activity to Improve Crop Drought Tolerance. Cells 2018, 7, 123.

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