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ROP GTPases are required for YUC transcription and auxin-mediated root hair growth in Arabidopsis.
Cell Reports · · Journal Article
Li, Ni + more
Abstract ↗AI summary
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In Arabidopsis thaliana root hairs, redundant ROP2/4/6 GTPases are required for YUC-dependent auxin biosynthesis, with rop2/4/6 mutants showing reduced hair growth and auxin accumulation.
- Why it matters: It was unclear whether ROP signaling regulates auxin biosynthesis, not just auxin response and transport, during plant cell growth.
- What they did: Using Arabidopsis root hairs, the rop2/4/6 mutant was tested for auxin levels and transcription of all 11 YUC genes, and rescue was done with external auxin or YUC2/8 overexpression.
- The result: Auxin or YUC2/8 expression restored rop2/4/6 root hair growth, and a Pol II RPB1 CTD phosphomimetic (S5D) increased YUC2/8 expression and hair growth, linking Pol II phosphorylation to ROP-mediated YUC transcription.
The findingWhy it mattersWhat they didThe result
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