In a tandem repeat with AT2G30424 and AT2G30432. Negative regulator of trichome development. Overexpression results in the suppression of trichomes and overproduction of root hairs; single mutant shows an increase in trichome number on leaves and petiols. Double and triple mutant analysis indicates that the ETC2 gene acts redundant with TRY and CPC in trichome patterning.
In a tandem repeat with AT2g30432 (TCL1) and AT2g30420 (ETC2), it encodes a single-repeat R3 MYB transcription factor that is involved in the negative regulation of trichome formation.
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