GABA operates upstream of H⁺-ATPase and improves salinity tolerance in Arabidopsis by enabling cytosolic K⁺ retention and Na⁺ exclusion

• Published in: Journal of experimental botany Vol. 70; no. 21; pp. 6349 - 6361
• Main Authors: Su, Nana, Wu, Qi, Chen, Jiahui, Shabala, Lana, Mithöfer, Axel, Wang, Haiyang, Qu, Mei, Yu, Min, Cui, Jin, Shabala, Sergey
• Format: Journal Article
• Language: English
• Published: UK Oxford University Press 18.11.2019
• Subjects: Plant—Environment Interactions; Research Papers; Arabidopsis; ATPase; hydrogen peroxide; reactive oxygen species; H; potassium retention; sodium sequestration; H+-ATPase

The non-protein amino acid γ-aminobutyric acid (GABA) rapidly accumulates in plant tissues in response to salinity. However, the physiological rationale for this elevation remains elusive. This study compared electrophysiological and whole-plant responses of salt-treated Arabidopsis mutants pop2-5 a...