Transcriptional activator that regulates root development by controlling meristem size and patterning of the root apical meristem. Regulates auxin transport and gradients in the root meristematic cells via direct regulation of the auxin efflux carrier PIN1 and PIN4 gene expression. Binds specifically to the CArG-box DNA sequences in the promoter regions of PIN1 and PIN4 genes (PubMed:24121311). Involved in the regulation of shoot apical meristem (SAM) cell identities and transitions. Promotes flowering transition and participates in flower meristem maintenance and determinacy. Positively regulates TFL1 and WUS expression. Binds directly to the TFL1 regulatory sequences (PubMed:25636918). Interacts with AGL16. Preferentially expressed in roots (PubMed:7549482). Expressed in lateral root cap, root epidermis, root endodermis, columella of the root meristematic region, the vascular cylinder in differentiated zones of the primary root and in emerged lateral root primordia (PubMed:24121311). Expressed in pollen (PubMed:12949148). During floral transition, expressed very early at the flanks of the inflorescence meristem in the anlagens upon the transition to flowering Subsequently, expression levels increase in the first and second stages of the floral meristem and at stage 3, expression is restricted to the L1 and L2 layers. Later on, expressed in the gynoecium and stamen primordia at stage 6. By auxin. Retarded root growth, and altered root meristem size and stem-cell patterning (PubMed:24121311). Late flowering phenotype (PubMed:25636918). XAANTAL is the Mayan word for 'go slower' in recognition of the retarded root growth phenotypes of xaantal mutants. Plants over-expressing AGL14/XAL2 show early flowering phenotype and flowers have vegetative traits.