Plant Cell EnvironJClub
CaSnRK2.4-Mediated Phosphorylation of CabZIP032 Regulates CaABI5 and CaSPS1 Expression to Modulate ABA Signalling and Sucrose Metabolism During Drought Tolerance in Pepper.
Plant, Cell & Environment · · Journal Article
Zhang, Pei + more
Abstract ↗AI summary
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CaSnRK2.4 phosphorylates CabZIP032 at Ser251, and this phosphorylation enhances drought tolerance in pepper by boosting ABA signalling and sucrose biosynthesis gene expression.
- Why it matters: Drought adaptation in non-model crops like pepper is poorly understood, especially how ABA and sucrose pathways are coordinated at the transcriptional level.
- What they did: Using yeast two-hybrid and in planta assays, the study showed direct CaSnRK2.4–CabZIP032 interaction and Ser251 phosphorylation; CabZIP032 S251A reduced tolerance, while S251D increased it.
- The result: CabZIP032 activated CaABI5 and CaSPS1 via ACGT and G-box cis-elements, and silencing either increased drought sensitivity with lower ABA and soluble sugars; ABA or sucrose application rescued tolerance.
The findingWhy it mattersWhat they didThe result
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