Influence of Gibberellin on the Growth and Development of Sophora davidii Seedlings
In this research,different concentrations (0,0.05 mg/L,0.1 mg/L,0.2 mg/L,0.4 mg/L,0.6 mg/L,0.8 mg/L and 1.0 mg/L) of gibberellin (GA) were used to treat the seedlings ofSophora davidii so as to explore the effect of GA on the growth and development.Results showed that GA,at different concentrations,could accelerate the elongation of the roots of Sophora davidii.The main root of the Sophora davidii seedlings treated by GA at a concentration of 0.6 mg/L for 12 d was found to be the longest.With increasing concentration of GA,the stem length tended to firstly increase and then reduce,and was shown to be at its maximum after 12 d of the treatment using 0.05 mg/L of GA.In addition,the number of lateral roots increased the most in this treatment group.As the concentration of GA increased,the number of euphyllae increased,and was at its maximum after being treated for 12 d using 0.6 mg/L of GA.Besides,the study also revealed that,with the growing concentration of GA,the chlorophyll a and b contents and the peroxidase activity (POD) were the highest in a short-term treatment (3 d) using 0.2 mg/L of GA,while the highest conductivity was found in the group treated with 0.4 mg/L of GA.For mediumterm treatment (6 d),the highest activities ofcatalase (CAT) and POD were found in seedlings treated with 0.6 mg/L of GA.The highest chlorophyll a and b contents,and the highest conductivity,were observed in groups treated with 0.4 mg/L and 0.6 mg/L of GA for 12 d,separately.
GibberellinSophora davidiiExternal morphologyPhysiological index
NETL
NSTL
万方数据
维普
