PIP aquaporin gene expression in arbuscular mycorrhizal Glycine max and Lactuca sativa plants in relation to drought stress tolerance

Plant Molecular Biology
Rosa PorcelJuan Manuel Ruiz-Lozano

Abstract

Although the discovery of aquaporins in plants has resulted in a paradigm shift in the understanding of plant water relations, the relationship between aquaporins and plant responses to drought still remains elusive. Moreover, the contribution of aquaporin genes to the enhanced tolerance to drought in arbuscular mycorrhisal (AM) plants has never been investigated. Therefore, we studied, at a molecular level, whether the expression of aquaporin-encoding genes in roots is altered by the AM symbiosis as a mechanism to enhance host plant tolerance to water deficit. In this study, genes encoding plasma membrane aquaporins (PIPs) from soybean and lettuce were cloned and their expression pattern studied in AM and nonAM plants cultivated under well-watered or drought stressed conditions. Results showed that AM plants responded to drought stress by down-regulating the expression of the PIP genes studied and anticipating its down-regulation as compared to nonAM plants. The possible physiological implications of this down-regulation of PIP genes as a mechanism to decrease membrane water permeability and to allow cellular water conservation is further discussed.

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Citations

Apr 11, 2013·Mycorrhiza·Leonardo CasieriDaniel Wipf
Mar 10, 2012·Journal of Experimental Botany·Ian C Dodd, Francisco Pérez-Alfocea
Nov 18, 2011·Molecular Plant-microbe Interactions : MPMI·Alfonso Navarro-RódenasAsunción Morte
May 10, 2013·Molecular Plant-microbe Interactions : MPMI·Alfonso Navarro-RódenasAsunción Morte
Mar 3, 2009·Applied and Environmental Microbiology·Abul Kalam AzadHitoshi Shibata
Oct 12, 2010·Genetics and Molecular Research : GMR·R Stolf-MoreiraA L Nepomuceno
Oct 11, 2011·Current Opinion in Biotechnology·Ian C Dodd, Juan Manuel Ruiz-Lozano
Aug 27, 2013·The Journal of Steroid Biochemistry and Molecular Biology·Anna JaneczkoOndřej Novák
Oct 31, 2016·Trends in Plant Science·Kevin GarciaPierre-Emmanuel Courty
Sep 4, 2015·Physiological Reviews·Christophe MaurelLionel Verdoucq
Apr 13, 2019·International Journal of Molecular Sciences·Manoj Kaushal

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