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A simple auxin transcriptional response system regulates multiple morphogenetic processes in the liverwort Marchantia polymorpha.

Flores-Sandoval, E., et al. · 2015 · PLoS Genetics   other

doi:10.1371/journal.pgen.1005900   PMID:26901620   PMC4764325

Linked genes (2)  1 core 1 peripheral

Gene ID Name Evidence / Role Function (this paper)
Mp6g05000 MpIAA experimental subject Functionally studied as the core auxin co-receptor/repressor of the Marchantia auxin response system. amiRNA knock-down lines (amiRMpIAA, cleavage confirmed by RLM-RACE) showed auxin hypersensitivity at sporeling and adult stages, including reduced thallus area and ectopic rhizoids, identifying MpIAA as a negative regulator of auxin signaling controlling morphogenesis.
Mp3g19510 MpSHI experimental tool Its promoter (proMpSHI), expressed near the apical cell, was used to drive iaaL for tissue-specific auxin depletion (proMpSHI:iaaL caused irregular zig-zag gemma cup arrangement); MpSHI itself was not functionally characterized.