ABT3 — Nicotiana attenuata

Summary

A4A49_31688 (ABT3, WRKY65) in coyote tobacco (Nicotiana attenuata) encodes a WRKY transcription factor with sequence-specific DNA binding and promoter-specific chromatin binding activities, localising to the nucleus. It is associated with the breakdown of cytokinin and abscisic acid, abscisic acid-mediated signalling in stomatal movement, positive regulation of leaf senescence, the MAPK cascade, and responses to chitin, fungi, bacteria, salicylate, and gibberellin. The gene is linked to phytoalexin biosynthesis, virus-induced PTGS, and downregulation of both abscisic acid and gibberellic acid signalling. Associations with drought tolerance, leaf water potential, leaf temperature, stomatal resistance, and thermomorphogenesis have been recorded. Studies of related WRKY family members in other species connect the family to traits including plant height, chlorophyll content, transpiration rate, and salt response.