GABA plays a key role in plant acclimation to a combination of high light and heat stress

• DOI: 10.1101/2021.02.13.431103
• Publication Date: 2021-02-15T01:10:10Z
• Authors: Damián Balfagón; Aurelio Gómez-Cad...; José L. Rambla; Antonio Granell; Carlos de Ollas; Ron Mittler; Sara I Zandalinas
• Keywords: Gamma-Aminobutyric Acid

ABSTRACT Plants are frequently subjected to different combinations of abiotic stresses, such as high light intensity and elevated temperatures. These environmental conditions pose an important threat agriculture production, affecting photosynthesis decreasing yield. Metabolic responses plants, alterations in carbohydrates amino acid fluxes, play a key role the successful acclimation plants directing resources towards stress suppressing growth. Here we show that primary metabolic response Arabidopsis thaliana or heat is than combination stress. We further demonstrate results unique includes increased accumulation sugars acids, coupled with decreased levels metabolites participating tricarboxylic (TCA) cycle. Among acids exclusively accumulated during stress, identified non-proteinogenic γ-aminobutyric (GABA). Analysis mutants deficient GABA biosynthesis, particular two independent alleles glutamate decarboxylase 3 ( gad3 ), reveal plays Taken together, our findings identify new for regulating plant combination. One sentence summary The (GABA) required Arabidopsis.