Abstract :
In order to determine the folic acid role in seed germination stage and some seedling growth of wheat, two compactly randomized design (CRD) experiments with 4 replications was conducted. In the first experiment, different levels of Sulfamethoxazole (5, 10, 20 and 30 micro molar) as inhibitor of folic acid production on the seed germination and seedling growth of wheat were used. Analysis of variance indicated significant differences among different levels of Sulfamethoxazole for germination rate, seedling growth, seed reserve utilization, the efficiency of mobilized seed reserve into plant tissue and seed reserve depletion percentage. In the second experiment, different combinations of folic acid and Sulfamethoxazole with control were used. Results of this experiment indicated significant differences among treatments and verified finding of the first experiment. Fitting linear regression of different concentrations of Sulfamethoxazole solution as the independent variable and the measured traits as the dependent variable indicated significant relations with relatively high amount of coefficient of destination except germination percentages. The positive effects of folic acid on growth and development of seeds indicates its important role in biochemical and physiological process in plant cells. Generally, we conclude that using Sulfamethoxazole as biosynthesis inhibitor of folic acid, can suppress most living process in seed germinating period such as the germination rate, seed reserve utilization, the efficiency of mobilized seed reserve into plant tissue and seed reserve depletion percentage.
