Journal
PLANT SIGNALING & BEHAVIOR
Volume 14, Issue 5, Pages -Publisher
TAYLOR & FRANCIS INC
DOI: 10.1080/15592324.2019.1588672
Keywords
B-box; BBX31; UV-B radiation; HY5; photomorphogenesis; light signaling; metabolites
Categories
Funding
- Department of Biotechnology, Ministry of Science and Technology [BT/PR19193/BPA/118/195/2016]
- Science and Engineering Research Board [ECR/2016/001176]
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Photomorphogenesis is an important developmental process that helps the seedlings adapt to external light conditions. B-Box proteins are a family of transcription factors that regulate photomorphogenic responses. BBX31 negatively regulates photomorphogenesis under visible light. In contrast, it promotes photomorphogenesis under UV-B and enhances tolerance to high doses of UV-B radiation. BBX31 and HY5 independently and oppositely regulate the ability of seedlings to adapt to varying light intensities. BBX31 also regulates primary root elongation under low intensities of white light. GC-MS and HPLC-based metabolite profiling identified differential accumulation of multiple primary and secondary metabolites in 35S:BBX31 that might enhance tolerance to UV-B.
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