Encodes an AP2-domain containing protein similar to ANT. Expressed in embryos and lateral root primordium. PLT4 acts after PLT3,5 and 7 during lateral roof formation.
Expressed in embryo during embryogenesis, first throughoutthe embryo, but later basally localized at the heart stage (PubMed:12172019, PubMed:25564655). Also present in free nuclear endosperm, but disappears once endosperm cellularization begins (PubMed:12172019). Observed in the stem cell niche and the provascular tissue of mature roots (PubMed:25564655).
Transcription factor that, in opposition to HDG1, promotes cell proliferation and morphogenesis via transcriptional activation of meristem and cell proliferation genes, but prevents differentiation, especially during embryogenesis (PubMed:12172019, PubMed:25564655). Binds to the promoter and triggers the expression of epidermally expressed genes such as GSO1, GSO2, ACR4 and WER, and of HD-ZIP homeobox genes including PDF2, HDG1, HDG5, HDG7, HDG8, HDG11, ANL2, PDF2 and ATML1 (PubMed:25564655).