Alternative Splicing of CsCPL Relieves the Inhibitory Effect of CsCPL on Trichome Formation and Anthocyanin Biosynthesis in Tea Plants.

Alternative splicing of CsCPL in tea plants generates CsCPL AS, which reduces CsCPL’s inhibition of trichome formation and anthocyanin biosynthesis by disrupting MBW complex formation.

• Why it matters: Tea bud trichomes strongly affect tea quality, but how their development is regulated at the molecular level remains incompletely understood.
• What they did: The study identified the R3 MYB repressor CsCAPRIC-like (CPL) and showed that CsCPL binds CsGL3 to block CsMYB15-CsGL3-CsWD40 and CsMYB6-CsGL3-CsWD40 complexes, suppressing CsGL2 and CsANS.
• The result: Because CsCPL AS cannot bind CsGL3 but can form a non-functional heterodimer with CsCPL, it alleviates CsCPL’s inhibitory effect on trichome formation and anthocyanin biosynthesis.

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