The BoMIEL1-BoMYB96 Module Responds to ABA Signals to Enhance the Drought Tolerance of Cabbage (Brassica oleracea var. capitata).

Overexpressing BoMYB96 in cabbage (Brassica oleracea var. capitata) significantly enhances drought tolerance, reducing oxidative damage and increasing proline content, while BoMYB96 silencing does the opposite.

• Why it matters: Drought strongly limits cabbage yield and quality, and MYB transcription factor roles in cabbage are still insufficiently characterized, despite links between MYB96 and ABA-mediated drought responses.
• What they did: The study cloned BoMYB96, generated transgenic overexpression and silenced lines, and measured drought phenotypes plus oxidative damage and proline; it also tested whether BoMIEL1 ubiquitinates BoMYB96 and whether ABA inhibits this step.
• The result: BoMIEL1 mediates BoMYB96 ubiquitination and degradation, and ABA inhibits this process during drought, leading to BoMYB96 protein accumulation that improves drought tolerance and supports breeding drought-tolerant cabbage.

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