The effects of temperature and light on the content of soluble protein and soluble sugar in rice leaves and grains were discussed. High temperature promotes the translocation of soluble protein and soluble sugar from ...The effects of temperature and light on the content of soluble protein and soluble sugar in rice leaves and grains were discussed. High temperature promotes the translocation of soluble protein and soluble sugar from leaves to grains, resulting in the high content of them in grains, and at the same time, it accelerates the senescence of leaves, resulting in a high remains of them in leaves and low grain-weight. At identical high temperature, the senescence of leaves in weak light is slower than that in strong light. Moderate temperature makes the translocation of soluble protein and soluble sugar from leaves to grains steady and transduction of sugar to starch to a greater degree, resulting in full grain filling. At the same low temperature, the strong photosynthesis in strong light can make up for the fast senescence. Among the four combinations, low-temperature and strong-light are most advantageous to milk filling, and the high-temperature and weak-light are the worst.展开更多
The effect of cold acclimation on the freezing resistance and total soluble protein content in Populus tomentosa seedlings was studied for the first time in this paper. The results showed that in order to acquire high...The effect of cold acclimation on the freezing resistance and total soluble protein content in Populus tomentosa seedlings was studied for the first time in this paper. The results showed that in order to acquire higher freezing resistance, cold acclimation of Populus tomentosa seedlings might get through three periods, in which temperatures were -1℃、-2℃and -3℃ respectively. The freezing resistance of seedlings began to be induced by -1℃,but the third period of cold acclimation at -3℃ had most effect on the development of seedling freezing resistance. Suitable light could increase the freezing resistance and the content of total soluble protein of seedlings during cold acclimation, whereas 20 mg·L -1 of cycloheximide pretreatment of seedlings obviously decreased the freezing resistance and the content of total soluble protein. Further analysis found that the enhancement of total soluble protein content was closely related to the freezing resistance during cold acclimation.展开更多
文摘The effects of temperature and light on the content of soluble protein and soluble sugar in rice leaves and grains were discussed. High temperature promotes the translocation of soluble protein and soluble sugar from leaves to grains, resulting in the high content of them in grains, and at the same time, it accelerates the senescence of leaves, resulting in a high remains of them in leaves and low grain-weight. At identical high temperature, the senescence of leaves in weak light is slower than that in strong light. Moderate temperature makes the translocation of soluble protein and soluble sugar from leaves to grains steady and transduction of sugar to starch to a greater degree, resulting in full grain filling. At the same low temperature, the strong photosynthesis in strong light can make up for the fast senescence. Among the four combinations, low-temperature and strong-light are most advantageous to milk filling, and the high-temperature and weak-light are the worst.
文摘The effect of cold acclimation on the freezing resistance and total soluble protein content in Populus tomentosa seedlings was studied for the first time in this paper. The results showed that in order to acquire higher freezing resistance, cold acclimation of Populus tomentosa seedlings might get through three periods, in which temperatures were -1℃、-2℃and -3℃ respectively. The freezing resistance of seedlings began to be induced by -1℃,but the third period of cold acclimation at -3℃ had most effect on the development of seedling freezing resistance. Suitable light could increase the freezing resistance and the content of total soluble protein of seedlings during cold acclimation, whereas 20 mg·L -1 of cycloheximide pretreatment of seedlings obviously decreased the freezing resistance and the content of total soluble protein. Further analysis found that the enhancement of total soluble protein content was closely related to the freezing resistance during cold acclimation.