Expression of the grapevine anion transporter ALMT2 in Arabidopsis roots decreases the shoot Cl-/NO3- ratio under salt stress.

ABSTRACT: Grapevines (Vitis vinifera, Vvi) are economically important crop plants which, when challenged with salt (NaCl) in soil and/or irrigation water, tend to accumulate Na+ and Cl- in aerial tissues, impacting yield and berry acceptability for winemaking. Grapevine (Vitis spp.) rootstocks vary in their capacity for shoot Cl- exclusion. Here, we characterize two putative anion transporter genes-Aluminium-activated Malate Transporter VviALMT2 and VviALMT8-that were differentially expressed in the roots of efficient (140 Ruggeri) and inefficient (K51-40) Cl--excluding rootstocks, to explore their potential for impacting shoot Cl- exclusion. Using the Xenopus laevis oocyte expression system, VviALMT2 and VviALMT8 formed conductive channels that were highly permeable to NO3-, slightly to moderately

SUBMITTER: Wu Y 

PROVIDER: S-EPMC12321745 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature