Cytokinins mainly promote:
Cytokinins constitute class of N6 substituted adenine derivatives including natural trans zeatin, isopentenyl adenine and synthetic benzylaminopurine BAP, kinetin, that primarily drive shoot proliferation, cell division and delay senescence. Perception occurs through membrane localized histidine kinase receptors AHK2, AHK3, AHK4 autophosphorylating upon cytokinin binding, transferring phosphate to histidine phosphotransfer proteins AHPs that shuttle to nucleus phosphorylating type-B Arabidopsis Response Regulators ARR1, ARR10, ARR12 transcription factors. Type-B ARRs directly induce expression
Ref: Mok & Mok Annu Rev Plant Biol cytokinin metabolism; Kieber & Schaller Arabidopsis Book 2014.
