Three new amide derivatives(alteralkaloids A-C,1-3)and three known alkaloids(4-6)were afforded after phytochemical investigation of fungus Alternaria brassicicola.The structures of these compounds were confirmed by NM...Three new amide derivatives(alteralkaloids A-C,1-3)and three known alkaloids(4-6)were afforded after phytochemical investigation of fungus Alternaria brassicicola.The structures of these compounds were confirmed by NMR spectroscopic and HRESIMS data.Furthermore,the absolute configuration of 1 was determined using the single-crystal X-ray diffraction analysis.Compounds 1-3 belong to a class of amide derivatives that have not been found in nature before,sharing the same characteristic signals of the butyl moiety and amide group.These isolated compounds mentioned above were tested for the cytotoxic activity.展开更多
[Objective] Disease analysis and pathogen identification of black spot disease of Chinese cabbage [Alternaria brassicae（Berk.） Sace.] in Bijie City of Guizhou Province was carried out,so as to raise the correspondin...[Objective] Disease analysis and pathogen identification of black spot disease of Chinese cabbage [Alternaria brassicae（Berk.） Sace.] in Bijie City of Guizhou Province was carried out,so as to raise the corresponding prevention measures.[Method] Pathogen was isolated from diseased leaves using tissue surface separation method for cultivation,microscopic examination,spore size determination and pathogen identification.[Result] Microscopic examination showed that the disease was caused by Alternaria sp.,the size of its spores was（15.0-38.5） μm×（7.5-13.5） μm.Combining with the characteristics of host and pathogen,the pathogen caused black spot disease of Chinese cabbage was identified to be Alternaria brassicicola.[Conclusion] A.brassicicola was the pathogenic fungi of black spot disease of Chinese cabbage in Bijie City of Guizhou Province,and damage caused by the disease could be reduced through agricultural measures and chemical control.展开更多
基金the National Program for Support of Top-notch Young Professionals(No.0106514050)the National NSFC(Nos.82273811 and 82104043)+3 种基金the National Key R&D Program of China(No.2021YFA0910500)the National NSF for Distinguished Young Scholars(No.81725021)the Innovative Research Groups of the National NSFC(No.81721005)the Academic Frontier Youth Team of HUST(No.2017QYTD19).
文摘Three new amide derivatives(alteralkaloids A-C,1-3)and three known alkaloids(4-6)were afforded after phytochemical investigation of fungus Alternaria brassicicola.The structures of these compounds were confirmed by NMR spectroscopic and HRESIMS data.Furthermore,the absolute configuration of 1 was determined using the single-crystal X-ray diffraction analysis.Compounds 1-3 belong to a class of amide derivatives that have not been found in nature before,sharing the same characteristic signals of the butyl moiety and amide group.These isolated compounds mentioned above were tested for the cytotoxic activity.
文摘[Objective] Disease analysis and pathogen identification of black spot disease of Chinese cabbage [Alternaria brassicae（Berk.） Sace.] in Bijie City of Guizhou Province was carried out,so as to raise the corresponding prevention measures.[Method] Pathogen was isolated from diseased leaves using tissue surface separation method for cultivation,microscopic examination,spore size determination and pathogen identification.[Result] Microscopic examination showed that the disease was caused by Alternaria sp.,the size of its spores was（15.0-38.5） μm×（7.5-13.5） μm.Combining with the characteristics of host and pathogen,the pathogen caused black spot disease of Chinese cabbage was identified to be Alternaria brassicicola.[Conclusion] A.brassicicola was the pathogenic fungi of black spot disease of Chinese cabbage in Bijie City of Guizhou Province,and damage caused by the disease could be reduced through agricultural measures and chemical control.
