Abstract:

Seeds from dormancy cultivar 4628 and none-dormancy cultivar 996, harvested in 30 days after heading, which were used to scan glume structure by scanning electron microscopy and determine seed water absorption, air absorption, enzyme activity, soluble sugar content, soluble protein content and endogenous hormones content. The results showed that the poor water absorption and air absorption were found in dormancy cultivar 4628 seed, the activities of catalase (CAT), peroxidase (POD), dehydrogenase and amylase, the contents of soluble protein and soluble sugar in dormancy cultivar 4628 seed were significantly lower than those of none-dormancy cultivar 996 seed, the contents of GA, IAA and ZR in dormancy cultivar 4628 seed were lower than those of none-dormancy cultivar 996, while higher than that of none-dormancy cultivar 996 seed in ABA content. Scanning electron microscopy showed the surface cell of glume was unloose arranged with less villus and less hole in dormancy cultivar 4628, hindered water absorption and air absorption.