An expression analysis of a gene family encoding plasma membrane aquaporins in response to abiotic stresses in Arabidopsis thaliana

Plant Molecular Biology
Ji Young JangHunseung Kang

Abstract

Aquaporin belongs to a highly conserved group of membrane proteins called major intrinsic proteins that facilitate water transport across biological membranes. The genome of Arabidopsis encodes 35 aquaporin genes with 13 homologs in the plasma membrane intrinsic protein (PIP) subgroup. However, the function of each individual aquaporin isoform and the integrated function of plant aquaporins under various physiological conditions remain unclear. As a step toward understanding the aquaporin function in plants under various environmental stimuli, the expressions of a gene family encoding 13 PIPs in Arabidopsis thaliana under various abiotic stress conditions including drought, cold, and high salinity, or abscisic acid (ABA) treatment were investigated by a quantitative real-time reverse transcription-PCR analysis. Several PIP genes were predominantly expressed either in the roots or in the flowers. The expressions of both the highly expressed aquaporins including PIP1;1, PIP1;2, and PIP2;7 and the weakly expressed aquaporins such as PIP1;4, PIP2;1, PIP2;4, and PIP2;5 were modulated by external stimuli. The analyses of our data revealed that only the PIP2;5 was up-regulated by cold treatment, and most of the PIP genes were down-reg...Continue Reading

Citations

Nov 15, 2006·TAG. Theoretical and applied genetics. Theoretische und angewandte Genetik·S Poormohammad KianiA Sarrafi
Feb 14, 2007·Plant Cell Reports·Choonkyun JungJong-Joo Cheong
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Jun 15, 2007·Functional & Integrative Genomics·Kerrie L Forrest, Mrinal Bhave
Mar 11, 2011·Journal of Plant Research·Cortwa HooijmaijersHunseung Kang
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Sep 15, 2011·Journal of Experimental Botany·Ricardo ArocaJuan Manuel Ruiz-Lozano
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