Effects of Natural Brassinolide on Seed Germination and Hypocotyl Elongation of Beans

Seeds of soybeans and mung beans were soaked into five different concentrations( 0,0. 05,0. 10,0. 20,0. 30 mg / L) of natural brassinolide( NBR)solution. According to the results,natural brassinolide treatment could improve seed germination rate and hypocotyl-radicle ratio of soybeans and mung beans and promote the growth of sprouts. To be specific,seed germination rate of soybeans reached the highest in 0. 05 mg / L natural brassinolide treatment,which was improved by 25. 0 percentage points compared with the control group,and the sprout length was improved by 4. 33 cm; 0. 30 mg / L natural brassinolide exhibited the most significant promotion effect on seed germination and sprout growth of mung beans,seed germination rate was improved by 18. 3 percentage points and sprout length was improved by 7. 29 cm; hypocotyl-radicle ratio of soybean and mung bean sprouts reached the highest( 2. 96,1. 43) in 0. 05 mg / L natural brassinolide treatment.