Effect of uniconazole on degradation of cotyledon's reserve material during germination of soybean seed.

摘要

For a better understanding of the effects of uniconazole on the germination of soybean seed, some germination items of seeds and the metabolism of carbon and nitrogen in the germination process of uniconazole power treated seeds on three materials Chengdou 9, Chengdou 13 and Gongxuan 1 were studied. The results showed that the germination rate, germinating potential and radicle length were increased significantly; however, uniconazole most markedly reduced hypocotyl length. Meanwhile, the contents of free amino acids, soluble protein, the total nitrogen, soluble sugar and free fatty acid were reduced, but the content of fat was increased by uniconazole treated in the earlier process of germination; however, their performance was contrary in the later process of seed germination. This suggested that the carbon and nitrogen metabolism of cotyledons were delayed initially, but they would be higher than those of the control once germination starts by uniconazole treatment during seed germination, which is beneficial to degradation of cotyledon's reserve material and seedling emergence.