In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigo...In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigorous stock( Pyrus betulaefolia stock) and that grafted with the dwarfing inter stock‘Zhong ai 1 hao'( P. betulaefolia rootstock). The results showed that the 4-year-old‘Huangguan'pear trees grafted with the dwarfing inter stock‘ Zhong ai 1 hao'were 2. 87 m high on average,with 70. 70% of short braches,converted into 21 016. 0 branches per 667 m^2,840. 64 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 75.On the other hand,for the‘Huangguan'trees grafted with vigorous stocks,the average tree height was 3. 17 m,and the short branch proportion was 63. 20%,converted into 15 806. 4 branches per 667 m^2,719. 28 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 55. Therefore,the use of dwarfing inter stock‘Zhong ai 1 hao'had significant dwarfing effect on‘Huangguan'pear trees,which also showed significant yield increasing effect.展开更多
One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-...One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.展开更多
基金Supported by the China Agriculture Research System(Pear)(CARS-28-36)the National Natural Science Foundation of China(31601708)+4 种基金the Agricultural Stock Breeding Project of Shandong Province(2016LZGC034)the Youth Foundation of Shandong Academy of Agricultural Sciences(2015YQN40)the National Science and Technology Plan for Rural Areas of China(2014BAD16B03-4)the Project for Agricultural Science and Technology Innovation of Shandong Academy of Agricultural Sciences(CXGC2018F03)the Key Science and Technology Innovation Project of Shandong Province(2018CXGC0208)
文摘In order to investigate the effect of dwarfing inter stock on the structure of pear trees,investigations were made to the tree and group structure of the 4-year-old spindle-shaped‘Huangguan'pear grafted with vigorous stock( Pyrus betulaefolia stock) and that grafted with the dwarfing inter stock‘Zhong ai 1 hao'( P. betulaefolia rootstock). The results showed that the 4-year-old‘Huangguan'pear trees grafted with the dwarfing inter stock‘ Zhong ai 1 hao'were 2. 87 m high on average,with 70. 70% of short braches,converted into 21 016. 0 branches per 667 m^2,840. 64 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 75.On the other hand,for the‘Huangguan'trees grafted with vigorous stocks,the average tree height was 3. 17 m,and the short branch proportion was 63. 20%,converted into 15 806. 4 branches per 667 m^2,719. 28 m^2 of leaf area per 667 m^2 with the leaf area coefficient of 1. 55. Therefore,the use of dwarfing inter stock‘Zhong ai 1 hao'had significant dwarfing effect on‘Huangguan'pear trees,which also showed significant yield increasing effect.
基金financially supported by Chinese Academy of Nutritional Sciences,Shanghai Institutes for Biological Sciences
文摘One new Iriterpene saponin was isolated from Panaxjaponicus C. A. Meyer var major （Burk.） C. Y. Wu et K. M. Feng, and established as oleanolic acid 3-O-[β-D-glucopyranosyl-（1 →2）-β-D-glucuronopyranosyl-6＇-O-n-butyl ester] which showed mod- erate antitumor activities against the A2780 cells and OVCAR-3 cells. Its structure was established by means of spectral data, particularly NMR, including HSQC and HMBC techniques.
