A new compound named melianoninol(I),along with five known corn- pounds melianol(Ⅱ),melianone(Ⅲ).meliandiol(Ⅳ),vanillin(Ⅴ)and vanillic acid(Ⅵ)was isolated from the fruits of Melia azedarach L..Their structures we...A new compound named melianoninol(I),along with five known corn- pounds melianol(Ⅱ),melianone(Ⅲ).meliandiol(Ⅳ),vanillin(Ⅴ)and vanillic acid(Ⅵ)was isolated from the fruits of Melia azedarach L..Their structures were elucidated by IR. MS,~1HNMR,^(13)CNMR,and other spectral evidence.Compounds Ⅱ,Ⅲ,Ⅳ possess different insecticidal effects.and Ⅰ exhibits a certain antifeeding property against the cabbage worm. (Pieris rapae L.).展开更多
[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disor...[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disorder in apple cultivation. [Method]With Fuji Apple as the tested material,the changes of Ca2+ content and antioxidant enzyme activity in different parts of apple fruit after picking bags and storage period were determined. [Result]The results showed that Ca contents in the light surface of fruits were higher than that in the backlight surface. The Ca contents of stalk cavity were higher than that of calyx-end. The activities of SOD,POD,CAT and APX in the light surface of fruits were higher than that in the backlight surface. The activities of SOD,POD,CAT and APX of stalk cavity were higher than that of calyx-end. The contents of MDA in the light surface of fruits were lower than that in the backlight surface. The contents of MDA of stalk cavity were lower than that of calyx-end. [Conclusion]The incidence rate of bitter pit in the light surface of fruits were lower than that in the backlight surface,and the incidence rate of bitter pit of stalk cavity were lower than that of calyx-end.展开更多
In this paper, it was aimed to identified and quantified hesperidin and limonin compounds using HPLC (High Performance Liquid Chromatography) techniques against to developing of mal secco disease caused by Phoma tra...In this paper, it was aimed to identified and quantified hesperidin and limonin compounds using HPLC (High Performance Liquid Chromatography) techniques against to developing of mal secco disease caused by Phoma tracheiphila. Six citrus lemon varieties (Meyer, Kiitdiken, Enterdonato, Yediveren, Sweet lemon and Euroka) were infected by P. tracheiphila and artificial inoculation were applied in vivo conditions. Before and after inoculation, leaf, branch and stem samples were taken from each lemon varieties. The results show that the amount of hesperidin and limonin concentration was increased after the inoculations at various levels based on the lemon cultivars. Various concentrations (1, 5, 10, 25, 50, 75, 100 ppm) of hesperidin and limonin compounds were also tested under in vitro conditions to compare response of P. tracheiphila development. According to the results, hesperidin and limonin compounds play an important role against to P. tracheiphila development and Sweet Lemon variety was found to be the most resistance both observation and HPLC results.展开更多
文摘A new compound named melianoninol(I),along with five known corn- pounds melianol(Ⅱ),melianone(Ⅲ).meliandiol(Ⅳ),vanillin(Ⅴ)and vanillic acid(Ⅵ)was isolated from the fruits of Melia azedarach L..Their structures were elucidated by IR. MS,~1HNMR,^(13)CNMR,and other spectral evidence.Compounds Ⅱ,Ⅲ,Ⅳ possess different insecticidal effects.and Ⅰ exhibits a certain antifeeding property against the cabbage worm. (Pieris rapae L.).
基金Supported by National Natural Science Foundation Project " Relationship between Distribution of Calcium in Bagged Apple Fruit and Bitter Pit" (30871683)Education Department Project of Shandong Province (J06K56)~~
文摘[Objective]The aim was to study the distribution of Ca in bagged apple fruit and the relationship between antioxidant enzyme activity and bitter pit disease,which will provide a basis for resolving Ca metabolism disorder in apple cultivation. [Method]With Fuji Apple as the tested material,the changes of Ca2+ content and antioxidant enzyme activity in different parts of apple fruit after picking bags and storage period were determined. [Result]The results showed that Ca contents in the light surface of fruits were higher than that in the backlight surface. The Ca contents of stalk cavity were higher than that of calyx-end. The activities of SOD,POD,CAT and APX in the light surface of fruits were higher than that in the backlight surface. The activities of SOD,POD,CAT and APX of stalk cavity were higher than that of calyx-end. The contents of MDA in the light surface of fruits were lower than that in the backlight surface. The contents of MDA of stalk cavity were lower than that of calyx-end. [Conclusion]The incidence rate of bitter pit in the light surface of fruits were lower than that in the backlight surface,and the incidence rate of bitter pit of stalk cavity were lower than that of calyx-end.
文摘In this paper, it was aimed to identified and quantified hesperidin and limonin compounds using HPLC (High Performance Liquid Chromatography) techniques against to developing of mal secco disease caused by Phoma tracheiphila. Six citrus lemon varieties (Meyer, Kiitdiken, Enterdonato, Yediveren, Sweet lemon and Euroka) were infected by P. tracheiphila and artificial inoculation were applied in vivo conditions. Before and after inoculation, leaf, branch and stem samples were taken from each lemon varieties. The results show that the amount of hesperidin and limonin concentration was increased after the inoculations at various levels based on the lemon cultivars. Various concentrations (1, 5, 10, 25, 50, 75, 100 ppm) of hesperidin and limonin compounds were also tested under in vitro conditions to compare response of P. tracheiphila development. According to the results, hesperidin and limonin compounds play an important role against to P. tracheiphila development and Sweet Lemon variety was found to be the most resistance both observation and HPLC results.