[Objective] The paper aimed to provide the theoretical foundation for rational using the large-seed rice.[Method] Large-seed rice 31C122、31C125 （ nearly 50 g /1 000-weight） and normal rice varieties including Jiyuj...[Objective] The paper aimed to provide the theoretical foundation for rational using the large-seed rice.[Method] Large-seed rice 31C122、31C125 （ nearly 50 g /1 000-weight） and normal rice varieties including Jiyujing and Fuyu 333 as materials,the accumulative process for sugar and starch in seeds was compared and analyzed.[Result] Sugar content of inferior grains was higher than superior grains in all tested materials,sugar content of large seeds was lower than conventional ones;starch content of superior grains was higher than inferior grains,starch content of conventional ones was higher than large-seed rice,amylopectin content was higher than amylose content in all tested materials,amylose content of large-seed rice was lower than conventional ones;the peak of accumulation starch for superior grains of large-seed rice was later than conventional ones,inferior grains advanced;active saving period of starch for superior grains of large-seed rice was longer than conventional ones.[Conclusion] The quality of large-seed rice was better than conventional ones.展开更多
This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materi...This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materials （ 10 kg for each material） were respectively dried to the suitable water content consistent with the ultra-dried seed criterion via heating at 50 ~C; then the physiological indices of these ultra-dried seeds such as water content, seed germination, dehydrogenase activity and SOD activity were measured. The results showed that except cowpea seeds, whose ultra-drying treatment should be controlled between two and four days, other three kinds of seeds were tolerant to high tem- perature and low water content. The ultra-dried seeds assumed similar or even higher activities than CKs, but showed no damage symptom. Our result proves that ultra-drying treatment via heating at 50 ℃ is safe and efficient to experimental seeds.展开更多
基金Supported by Sub-topic of National Science and Technology Support Program(2006BAD13B01-22)~~
文摘[Objective] The paper aimed to provide the theoretical foundation for rational using the large-seed rice.[Method] Large-seed rice 31C122、31C125 （ nearly 50 g /1 000-weight） and normal rice varieties including Jiyujing and Fuyu 333 as materials,the accumulative process for sugar and starch in seeds was compared and analyzed.[Result] Sugar content of inferior grains was higher than superior grains in all tested materials,sugar content of large seeds was lower than conventional ones;starch content of superior grains was higher than inferior grains,starch content of conventional ones was higher than large-seed rice,amylopectin content was higher than amylose content in all tested materials,amylose content of large-seed rice was lower than conventional ones;the peak of accumulation starch for superior grains of large-seed rice was later than conventional ones,inferior grains advanced;active saving period of starch for superior grains of large-seed rice was longer than conventional ones.[Conclusion] The quality of large-seed rice was better than conventional ones.
文摘This study was to understand the physiological changes of four kinds of crop seeds including baby corn, cowpea, radish and rape- seed, under the treatment of ultra-drying. Large amounts of seeds as experimental materials （ 10 kg for each material） were respectively dried to the suitable water content consistent with the ultra-dried seed criterion via heating at 50 ~C; then the physiological indices of these ultra-dried seeds such as water content, seed germination, dehydrogenase activity and SOD activity were measured. The results showed that except cowpea seeds, whose ultra-drying treatment should be controlled between two and four days, other three kinds of seeds were tolerant to high tem- perature and low water content. The ultra-dried seeds assumed similar or even higher activities than CKs, but showed no damage symptom. Our result proves that ultra-drying treatment via heating at 50 ℃ is safe and efficient to experimental seeds.
