Muti-omics revealed the global response of Hordeum vulgare to different wavelength of UV exposure

Background UV seriously affected Hordeum vulgare growth, which limited the its development and production in the plateau region. However, the detailed response mechanisms of Hordeum vulgare to UV exposure remain unclear. Results We found that UVA, UVAB and UVB reprogrammed the proteome pattern of H. vulgare . UVA mainly affected the expression of proteins involved in cell cycle and DNA repair, while UVB and UVAB mainly activated proteins involved in anthocyanin biosynthesis and antioxidant systems, leading to accumulation of anthocyanin in H. vulgare . Then, we constructed the network for regulating UV-triggered anthocyanin biosynthesis in H. vulgare using proteome profiles. Importantly, we identified that NAC transcription together with numerous kinases were responsible for regulating UVAB/UVB-triggered anthocyanin biosynthesis in H. vulgare . Of note, NAC1 directly bound on the promoters of CAD1 and CHS to trigger their expression, then activated anthocyanin biosynthesis in H. vulgare . Conclusions Our research gain insight into the global responses of H. vulgare to UV exposures, then provided guidance for protecting plant from UV stress in plateau.