Chemical PropertiesOff-White Solid UsesBrassinolide can be used as plant growth regulator. UsesPlant growth regulator. Uses Brassinolide has been used as a plant growth hormonee. General Description Brassinolide is a plant growth hormonee and the most biologically active brassinosteroid (BR). It has been implicated in Auxin signaling. It has also been used for studying plant biosynthetic pathways. Brassinolide might also regulate water-transport properties of cell membranes in Arabidopsis thaliana.