Promotion of cell expansion and cell elongation;[1] works with auxin to do so.[8] It has an unclear role in cell division and cell wall regeneration.[6] Promotion of vascular differentiation; BR signal transduction has been studied during vascular differentiation.[9] Is necessary for pollen elongation for pollen tube formation.[10] Acceleration of senescence in dying tissue cultured cells; delayed senescence in BR mutants supports that this action may be biologically relevant.[6] Can provide some protection to plants during chilling and drought stress.[6]