油菜素内酯(brassinolide,简称 BR)是一种新型的植物生长调节剂,它普遍存在于植物体内,其生理作用有别于已知的五大类植物内源激素,对细胞的伸长和分裂均有促进作用。据报道,BR 对植物生长发育、植物体内物质运输和积累以及体内的氮素代谢都有明显的促进作用。近几年来,由于人工合成油菜素内酯获得成功,BR 在农业上的应用研究得到广泛开展,但在烟草上的应用研究尚未见报道。本试验试图研究 BR 对烤烟生长发育及化学成分的影响,探讨改善烟叶品质的新途径。 Brassinolide (brassinolide, BR) is a new plant growth regulator, which is ubiquitous in plants. Its physiological function is different from that of the known five major types of endogenous hormones on cell elongation and division Have a catalytic role. BR has been reported to promote plant growth and development, plant material transport and accumulation, and nitrogen metabolism in vivo. In recent years, due to the success of artificially synthesized brassinosteroids, BR in agriculture has been widely applied research, but the application on tobacco has not been reported. This experiment attempted to study the effects of BR on the growth and chemical composition of flue-cured tobacco and to explore new ways to improve the quality of tobacco.