BRs, by regulating many plant physiological responses such as: promoting growth, enhancing plant resistance to environment stress, delaying senescence, promoting cellre-diiferentiation and so on, are essential for plant growth and development.

• BRs参与植物生理过程的许多方面，对植物的生长发育具有多种生理功能，如：促进生长、增加植物的抗逆性、延缓衰老、促进细胞的再分化等等。