The abstract is read at the publisher; the summary is JClub's.
Exogenous sucrose suppresses CsYABBY2 and CsMYB5 expression, derepressing CsPDX2.1 and reducing theanine levels in tea plants (Camellia sinensis).
- Why it matters: Theanine quality in tea depends on its hydrolysis, but how sucrose signaling regulates theanine accumulation through transcriptional control of the hydrolase gene was unclear.
- What they did: A yeast one-hybrid screen identified CsYABBY2 and CsMYB5 binding to TAATGATT and TAACCA cis-elements in the CsPDX2.1 promoter; their co-expression synergistically represses CsPDX2.1, supported by virus-induced gene silencing and transient overexpression.
- The result: The CsYABBY2-CsMYB5-CsPDX2.1 module negatively regulates CsPDX2.1 transcription and positively controls theanine accumulation, and sucrose modulates this pathway by suppressing the repressors.
The findingWhy it mattersWhat they didThe result
AI summary of the abstract · may contain errors · not medical advice · read the paper.