Acyl-CoA-Binding Protein (ACBP) genes: Their roles in response to abiotic stress and exogenous hormone application in barley(Hordeum vulgare L.)

Abstract

Abstract Background Acyl-CoA-binding proteins (ACBPs), which are coenzyme A transporters, play important roles in regulating plant growth and development in response to abiotic stress and phytohormones, and in membrane repair. To date, there has not been a comprehensive characterization of the barley (Hordeum vulgare L.) ACBP family. Results Eight ACBP genes were identified in the barley genome named HvACBP1–8. These HvACBP genes are specifically expressed in certain tissues and organs, and their expression is induced by abiotic stressors, such as drought, salinity, UV-B exposure, temperature extremes, and exposure to exogenous phytohormones. The HvACBP7 and HvACBP8 amino acid sequences were still conserved during the domestication of Tibetan Qingke barley. Conclusions These findings suggest that acyl-CoA-binding proteins could play important in barley growth and environmental adaptation. This study lays the foundation for further analyses of the biological functions of HvACBPs in the barley stress response.