Transcription factor that regulates the development of root hairs (PubMed:19675148). Does not seem to be involved in the regulation of sperm cell development (PubMed:28585562). Homodimer. Expressed in trichomes of the root maturation zone. Detected constitutively in flowers. Repressed by heat treatment. No visible phenotype under normal growth conditions (PubMed:19675148, PubMed:28585562). The triple mutant lrl1, lrl2 and lrl3 exhibit very short root hairs (PubMed:19675148).