PI — Nicotiana attenuata

Summary

A4A49_29655 (PI, also known as NaPI or GLO) in coyote tobacco (Nicotiana attenuata) on scaffold00423 encodes a MADS-box transcription factor containing K-box and MEF2-like domains. The gene product is associated with DNA-binding transcription factor activity, RNA polymerase II-specific, and has been linked to protein dimerization and kinase activities. PI is associated with the specification of petal and stamen identity, maintenance of floral organ and meristem identity, and megagametogenesis. It has been connected to floral organ size, petal number, stamen morphology, and flower development traits. The gene is also associated with herbivore resistance, defense responses, and jasmonic acid content. Additional associations include seed longevity, heterosis, bacterial blight disease resistance, and responses to high temperature stress. Studies of related genes in other species link the family to petal and stamen identity, floral morphogenesis, and immune responses.