PhYAB4-PhAGL6-2 Module Regulates Lip and Lip-Like Petal Morphogenesis in Paphiopedilum henryanum
The lip is a highly specialized floral organ in orchids and plays a central role in the unique pollination strategy of the genus Paphiopedilum. Despite extensive studies on floral organ identity in orchids, the developmental and molecular mechanisms underlying the formation of the characteristic slipper-shaped lip remain poorly understood.