Effect of gibberellin on the growth of three cultural black rice

Three of black rice (Hei Feng-nuo, Hanzhong Heijing, Hei You-zhan) were treated with three different concentration of gibberellin solutions. It was found that Hei Feng-nuo was more sensitive to GA, and the growth rate was nearly in linear relationship with the concentration of GA, but Hei Jing and Hei You-zhan were not sensitive to GA.