ArticlePlant cell reports2026
AtGASA1 positively regulates Arabidopsis response to salt stress by suppressing accumulation of reactive oxygen species.
Article in Plant cell reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
key messageAtGASA1 regulates plant growth and development, while conserved Cys-40 and Cys-44 residues in its GASA domain are crucial for controlling ROS accumulation under salt stress. AtGASA1 is a member of the gibberellin acid-stimulating protein (GASA) family, characterized by a GASA domain containing 12 conserved cysteine-rich peptides (CRP). Members of the GASA family are known to play an essential role in plant responses to both biotic and abiotic stresses; however, the function of AtGASA1 remains unclear. In this study, we found that gasa1 mutants exhibited sensitivity to salt stress, accompanied by increased accumulation of reactive oxygen species (ROS). In contrast, AtGASA1-overexpressing plants exhibited enhanced salt tolerance and significantly reduced ROS levels. These findings indicate that AtGASA1 positively regulates salt stress tolerance, likely through modulating ROS homeostasis. To explore the role of conserved cysteine residues within the GASA domain, site-directed mutagenesis was performed to substitute Cys-40 and Cys-44 with alanine. Functional assays in a yeast heterologous expression system showed that yeast expressing AtGASA1
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