Four new diphenyl ethers,named epicoccethers K−N(1−4),were purified from the fermentation medium of a fungus Epicoccum sorghinum derived from Myoporum bontioides,and identified through HR-ESI-MS and NMR spectral analy...Four new diphenyl ethers,named epicoccethers K−N(1−4),were purified from the fermentation medium of a fungus Epicoccum sorghinum derived from Myoporum bontioides,and identified through HR-ESI-MS and NMR spectral analysis.Except that compound 1 showed moderate antifungal activity against Penicillium italicum and Fusarium graminearum,the other three compounds showed stronger activity against them than triadimefon.All of them showed moderate or weak antibacterial activity towards Staphylococcus aureus and Escherichia coli with O6 and O78 serotypes except that 3 was inactive to E.coli O6.展开更多
[Objective]The paper was to investigate and identify new diseases in kiwifruit producing areas in Qiandongnan Prefecture to reduce the harm of diseases and ensure the quality of red-fleshed kiwifruit products.[Method]...[Objective]The paper was to investigate and identify new diseases in kiwifruit producing areas in Qiandongnan Prefecture to reduce the harm of diseases and ensure the quality of red-fleshed kiwifruit products.[Method]The pathogenic fungus was isolated from diseased leaves of redfleshed kiwifruit by tissue separation method,and DNA was sequenced by ribosomal rDNA-ITS(internal transcribed spacer)sequencing.Molecular evolutionary trees were built using MEGA4.0 software,and the pathogenic fungus was classified and identified combined with morphological obser-vation.[Result]Leaf tip blight was a new disease caused by Epicoccum sorghinum.It caused serious damage on red-fleshed kiwifruit.[Conclusion]The study supplements diseases of red-fleshed kiwifruit,and provides support for disease prevention and control in late stage.展开更多
In order to reduce the harm of diseases in red-fleshed kiwifruit in Qiandongnan Prefecture and ensure product quality, a new disease in the producing areas were investigated, and pathogen identification were carried o...In order to reduce the harm of diseases in red-fleshed kiwifruit in Qiandongnan Prefecture and ensure product quality, a new disease in the producing areas were investigated, and pathogen identification were carried out. The pathogen was isolated from diseased leaves by a tissue separation method. DNA sequencing was performed by the sequence analysis of ribosomal rDNA-ITS(Internal transcribed spacer) region, and a molecular evolutionary tree was constructed by the MEGA 4.0 software. The pathogenic fungus was classified and identified by combining morphological observation finally. The results showed that the dry blight disease in leaf tip was a new disease, which was caused by Epicoccum sorghinum, and it had a serious damage to red-fleshed kiwifruit.展开更多
基金supported by Guangdong Basic and Applied Basic Research Foundation(Nos.2019B1515210023,2020A1515010325)Guangdong Characteristic Innovation Projects of Colleges and Universities(No.2020KTSCX018)Guangdong Natural Science Foundation(No.2018A030313582).
文摘Four new diphenyl ethers,named epicoccethers K−N(1−4),were purified from the fermentation medium of a fungus Epicoccum sorghinum derived from Myoporum bontioides,and identified through HR-ESI-MS and NMR spectral analysis.Except that compound 1 showed moderate antifungal activity against Penicillium italicum and Fusarium graminearum,the other three compounds showed stronger activity against them than triadimefon.All of them showed moderate or weak antibacterial activity towards Staphylococcus aureus and Escherichia coli with O6 and O78 serotypes except that 3 was inactive to E.coli O6.
基金Supported by Provincial,Prefecture and College Science and Technology Cooperation Agreement Project of Science and Technology Department of Guizhou Province"Identification and Control Analysis of Kiwifruit Diseases and Insect Pests in Qiandongnan Prefecture:(QKH H[2017]7178)。
文摘[Objective]The paper was to investigate and identify new diseases in kiwifruit producing areas in Qiandongnan Prefecture to reduce the harm of diseases and ensure the quality of red-fleshed kiwifruit products.[Method]The pathogenic fungus was isolated from diseased leaves of redfleshed kiwifruit by tissue separation method,and DNA was sequenced by ribosomal rDNA-ITS(internal transcribed spacer)sequencing.Molecular evolutionary trees were built using MEGA4.0 software,and the pathogenic fungus was classified and identified combined with morphological obser-vation.[Result]Leaf tip blight was a new disease caused by Epicoccum sorghinum.It caused serious damage on red-fleshed kiwifruit.[Conclusion]The study supplements diseases of red-fleshed kiwifruit,and provides support for disease prevention and control in late stage.
基金Supported by Province,Prefecture and School Science and Technology Cooperation Agreement Project of Science and Technology Department of Guizhou Province (QKH H Z[2017]7178)The Science and Technologyof Guizhou Province (2017-1166)。
文摘In order to reduce the harm of diseases in red-fleshed kiwifruit in Qiandongnan Prefecture and ensure product quality, a new disease in the producing areas were investigated, and pathogen identification were carried out. The pathogen was isolated from diseased leaves by a tissue separation method. DNA sequencing was performed by the sequence analysis of ribosomal rDNA-ITS(Internal transcribed spacer) region, and a molecular evolutionary tree was constructed by the MEGA 4.0 software. The pathogenic fungus was classified and identified by combining morphological observation finally. The results showed that the dry blight disease in leaf tip was a new disease, which was caused by Epicoccum sorghinum, and it had a serious damage to red-fleshed kiwifruit.
