Plant Physiol BiochemJClub
RcbHLH79 negatively regulates 1,3,5-trimethoxybenzene biosynthesis and flower scent in roses.
Plant Physiology and Biochemistry · · Journal Article · Open access
Wu, Xu + more
Abstract ↗AI summary
The abstract is read at the publisher; the summary is JClub's.
RcbHLH79 directly binds the RcOOMT1 promoter and represses its transcription, negatively regulating 1,3,5-trimethoxybenzene biosynthesis and flower scent in Rosa chinensis 'Old Blush'.
- Why it matters: The molecular control of 1,3,5-trimethoxybenzene production in ancient Chinese roses is unclear, limiting targeted improvement of their distinctive tea-like fragrance.
- What they did: Using multi-omics across five developmental stages, the study found 18,186 differentially expressed genes and three differentially accumulated metabolites, then validated RcbHLH79 function with RNAi, overexpression, Y1H, Western blot, and dual-luciferase assays.
- The result: RcbHLH79 represses RcOOMT1 (but not RcOOMT2) by direct promoter binding, clarifying a regulatory node that can guide molecular breeding for enhanced rose fragrance.
The findingWhy it mattersWhat they didThe result
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