Determining the influences of environmental factors on seedling growth and leaf color may improve our understanding of the chromogenic mechanisms in leaves and the biosynthesis of anthocyanin. To determine the optimum...Determining the influences of environmental factors on seedling growth and leaf color may improve our understanding of the chromogenic mechanisms in leaves and the biosynthesis of anthocyanin. To determine the optimum conditions for Betula 'Royal Frost' seedling cultivation, we assessed seedling growth and anthocyanin content under natural conditions. The temperature had a significant influence on height but not on radial growth. Between June and September, the anthocyanin content was significantly positively correlated with light intensity and air moisture and significantly negatively correlated with temperature. In single-factor experiments to determine the variation in anthocyanin content in the greenhouse, anthocyanin content increased with increasing soil water content and at first increased, then decreased with increasing pH of the irrigation water and temperature, but decreased with increasing light intensity. K2SO4 can increase the anthocyanin content. So to maintain leaf color, seedlings should be cultivated with < 200 mu mol m(-2) s(-1) light intensity at 20 A degrees C and soil moisture content between 60 and 90%, and the irrigation water should be neutral or alkaline. Additionally, spraying with K2SO4 can be beneficial.展开更多
The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3...The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3, 29kD pI4 2, 14kD pI5 3 and 11 5kD pI5 16 protein point were induced by soil drought stress, and some protein disappeared, for instance four protein between 12 4～11 5kD pI5 8～6 44 in seedlings leaves of B. platyphylla during soil drought stress.展开更多
The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The ...The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The genetic variations of Betula luminifera were studied, based on the investigation of 1-year-old seedling traits from different families. The results showed that there were abundant variations within the Betula luminifera and very significant differences among families in seedling height, diameter and lateral branch. The variations were mainly controlled by genetic factors. According to this analysis, 11 excellent families were tentatively selected, the average genetic gain of height and diameter were 18.72% and 10.44% respectively. The selection effect was very striking. The Shaowu region was probably a superior genetic resource area of Betula luminifera .展开更多
基金supported by the Postdoctoral Science Foundation of Heilongjiang Province of China(LBHQ14003)the National Natural Science Foundation of China(No.31400535)
文摘Determining the influences of environmental factors on seedling growth and leaf color may improve our understanding of the chromogenic mechanisms in leaves and the biosynthesis of anthocyanin. To determine the optimum conditions for Betula 'Royal Frost' seedling cultivation, we assessed seedling growth and anthocyanin content under natural conditions. The temperature had a significant influence on height but not on radial growth. Between June and September, the anthocyanin content was significantly positively correlated with light intensity and air moisture and significantly negatively correlated with temperature. In single-factor experiments to determine the variation in anthocyanin content in the greenhouse, anthocyanin content increased with increasing soil water content and at first increased, then decreased with increasing pH of the irrigation water and temperature, but decreased with increasing light intensity. K2SO4 can increase the anthocyanin content. So to maintain leaf color, seedlings should be cultivated with < 200 mu mol m(-2) s(-1) light intensity at 20 A degrees C and soil moisture content between 60 and 90%, and the irrigation water should be neutral or alkaline. Additionally, spraying with K2SO4 can be beneficial.
文摘The studies on leave protein of Betula platyphylla seedlings by the methods of SDS PAGE electrophoresis and dimensional gel electrophoresis was concerned. The result indicated that some new proteins such as 29kD pI4 3, 29kD pI4 2, 14kD pI5 3 and 11 5kD pI5 16 protein point were induced by soil drought stress, and some protein disappeared, for instance four protein between 12 4～11 5kD pI5 8～6 44 in seedlings leaves of B. platyphylla during soil drought stress.
文摘The seedling stage test on 55 open-pollinated families of plus trees of Betula luminifera H. Winkl. from Shaowu, Nanping and Wuping in Fujian Province was carried out in State-owned Forest Farm of Weimin, Shaowu. The genetic variations of Betula luminifera were studied, based on the investigation of 1-year-old seedling traits from different families. The results showed that there were abundant variations within the Betula luminifera and very significant differences among families in seedling height, diameter and lateral branch. The variations were mainly controlled by genetic factors. According to this analysis, 11 excellent families were tentatively selected, the average genetic gain of height and diameter were 18.72% and 10.44% respectively. The selection effect was very striking. The Shaowu region was probably a superior genetic resource area of Betula luminifera .
