Work

Functional conservation between yeast and plant endosomal Na+/H+ antiporters1

Year: 2000

Type: article

Abstract: Vacuolar compartmentation of Na(+) is an essential mechanism for salinity tolerance since it lowers cytosolic Na(+) levels while contributing to osmotic adjustment for cell turgor and expansion. The AtNHX1 protein of Arabidopsis thaliana substituted functionally for ScNHX1, the endosomal Na(+)/H(+) antiporter of yeast. Ion tolerance conferred by AtNHX1 and ScNHX1 correlated with ion uptake into an intracellular pool that was energetically dependent on the vacuolar (H(+))ATPase. AtNHX1 localized to vacuolar membrane fractions of yeast. Hence, both transporters share an evolutionarily conserved function in Na(+) compartmentation. AtNHX1 mRNA levels were upregulated by ABA and NaCl treatment in leaf but not in root tissue.

Source: FEBS Letters

DOI: 10.1016/s0014-5793(00)01412-5

Authors: Francisco J. Quintero, Michael R. Blatt, José M. Pardo

Institutions: Consejo Superior de Investigaciones Científicas, Instituto de Recursos Naturales y Agrobiología de Sevilla, University of London, Wye College

Language: English

Topic: Plant Stress Responses and Tolerance

Subfield: Plant Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

Open Access status: bronze

Funder: European Commission

OpenAlex ID: W1603658332

FWCI: 15.99

Cites: 23

Cited by: 175

Related to: 9