Abstract
The APETALA2 (AP2) transcription factor superfamily in many plant species is extremely large. In addition to well-documented roles in stress responses, some AP2 members in arabidopsis, such as those of subgroup VIIIb, which includes DORNRÖSCHEN, DORNRÖSCHEN-LIKE, PUCHI, and LEAFY PETIOLE, are also important developmental regulators throughout the plant life cycle. Information is accumulating from orthologs of these proteins in important crop species that they influence key agronomic traits, such as the release of bud-burst in woody perennials and floral meristem identity and branching in cereals, and thereby represent potential for agronomic improvement. Given the increasing recognition of their developmental significance, this review highlights the function of these proteins and addresses their phylogenetic and evolutionary relationships.
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