CsWRKY33 Integrates Immune Signalling and Metabolic Reprogramming to Enhance Tea Plant Resistance Against
Tongtong Li1, Dahai Cao1, Wen Fang1
1School of Life Sciences, Anhui Agricultural University, Hefei, Anhui, China.
Plant, Cell & Environment
|June 18, 2026
Summary
Tea plants
Area of Science:
- Plant Pathology
- Molecular Plant-Biochemistry
- Plant Immunity
Background:
- Tea anthracnose, caused by Colletotrichum camelliae, significantly reduces tea yield and quality.
- Understanding the molecular mechanisms of tea plant immunity is crucial for developing resistant cultivars.
Purpose of the Study:
- To identify key regulators of tea plant immunity against C. camelliae.
- To elucidate the role of transcription factors in orchestrating immune responses and metabolic reprogramming.
Main Methods:
- Transcriptome analysis to identify induced genes.
- Protein-promoter binding assays (e.g., ChIP-seq) to determine direct targets.
- Dual-luciferase assays and gene expression analysis to validate regulatory functions.
- Metabolic profiling to assess changes in primary and secondary metabolism.
Main Results:
- CsWRKY33 is identified as a central regulator, significantly induced upon fungal infection.
- CsWRKY33 directly activates key immune genes (e.g., CsSERK2, CsMPK3) and forms a positive feedback loop.
- CsWRKY33 represses photosynthesis genes and activates phenylpropanoid pathway genes, reallocating resources for defense.
Conclusions:
- CsWRKY33 acts as a crucial transcriptional hub linking immune signaling with metabolic adjustments in tea plants.
- This WRKY transcription factor enhances tea plant resistance to anthracnose by coordinating defense responses.
- CsWRKY33 represents a promising target for breeding anthracnose-resistant tea varieties.
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