Adverse environmental stresses are known to affect plant growth and development, thus reducing crop productivity. Abscisic acid-, stress -, and ripening-induced (ASR) proteins play important roles in protecting plants from adverse environmental conditions. However, the biological functions of ASR proteins in Brachypodium remain unclear. We characterized the Brachypodium BdASR2 gene and concluded that it plays a positive role in salt stress tolerance. Overexpressing BdASR2 plants showed enhanced salt tolerance and decreased ion leakage and MDA content as compared to WT plants under salt stress conditions. Moreover, the roots were longer in overexpressing BdASR2 plants than WT plants under salt stress. The overexpression of BdASR2 increased antioxidant enzyme activity and upregulated the expression of stress-related genes under salt stress conditions. Taken together, these results indicate that BdASR2 plays important roles in salt stress responses by controlling ROS homeostasis and regulating the expression of stress-related genes.
Bibliographical noteFunding Information:
This research was funded by a Cooperative Research Program for Agriculture Science and Technology Development (PJ015666) funded by Rural Development Administration, Republic of Korea. This research was also supported by a grant Korea University. PCF acknowledges CONACYT for the scholarship granted.
© 2021, The Author(s), under exclusive licence to Korean Society of Plant Biologist.
- Brachypodium distachyon L
- Enzymatic antioxidants
- Salt stress
- Stress-responsive genes
ASJC Scopus subject areas
- Plant Science