The aim of this study was to investigate the in vitro antifungal effects of antifungal monomer component DZP8 isolated from Streptomyces 702 on the mycelium growth, sclerotium formation and germination of Rhizoctonia ...The aim of this study was to investigate the in vitro antifungal effects of antifungal monomer component DZP8 isolated from Streptomyces 702 on the mycelium growth, sclerotium formation and germination of Rhizoctonia solani and on the mycelium growth, conidial formation, germination, appressorium formation of Magnaporthe grisea. The results showed that the antifungal monomer component DZP8 has strong antifungal effect on both the R. solani and M. grisea. The EC50 and EC90 of DZP8 were 1.81 and 3.35 μg/ml on Ft. solani respectively, and 37.01 and 136.21 μg/ml on M. grisea respectively. Under the treatment of 48.01 μg/ml DZP8, the sclerotium formation rate of R. solani was just 39.21%, the formation time delayed by 216 h and the dry weight decreased by 81.37% in comparison the con- trol; and 33.51 μg/ml DZP8 significantly inhibited the sclerotium germination. In the presence of 160.08 μg/ml DZP8, the sporulation of M. grisea was just 9.29% of control sample; 20.14 μg/ml DZP8 inhibited the conidial germination suppression rate by 95.16%, and the appressorium formation by 100%.展开更多
Phenol composition of two carnation (Dianthus caryophyllus) cvs "Gloriana" and "Roland", partially and highly resistant to F. oxysporum f. sp. dianthi, respectively, has been investigated with the aim of assessi...Phenol composition of two carnation (Dianthus caryophyllus) cvs "Gloriana" and "Roland", partially and highly resistant to F. oxysporum f. sp. dianthi, respectively, has been investigated with the aim of assessing the possible role of phenolic constituents both as biochemical markers of resistance and antifungal molecules. Analyses were performed through chromatography, NMR and MS methods. The results indicate that protocatechuic and vanillic acids are present in healthy and infected tissues of both cvs; the flavonol glycoside peltatoside. 2,6-Dimethoxybenzoic acid was detected in small amounts only in infected "Gloriana" cv while the highly resistant "Roland" cv contained the flavone datiscetin. This latter compound, due to its noticeable antifungal activity evidenced in in vitro trials, could be conceived both as a biochemical marker of resistance towards this pathogen and as a phytoanticipin.展开更多
基金Supported by National Natural Science Foundation of China(31071724)Natural Science Foundation of Jiangxi Province(2010GZN0037)~~
文摘The aim of this study was to investigate the in vitro antifungal effects of antifungal monomer component DZP8 isolated from Streptomyces 702 on the mycelium growth, sclerotium formation and germination of Rhizoctonia solani and on the mycelium growth, conidial formation, germination, appressorium formation of Magnaporthe grisea. The results showed that the antifungal monomer component DZP8 has strong antifungal effect on both the R. solani and M. grisea. The EC50 and EC90 of DZP8 were 1.81 and 3.35 μg/ml on Ft. solani respectively, and 37.01 and 136.21 μg/ml on M. grisea respectively. Under the treatment of 48.01 μg/ml DZP8, the sclerotium formation rate of R. solani was just 39.21%, the formation time delayed by 216 h and the dry weight decreased by 81.37% in comparison the con- trol; and 33.51 μg/ml DZP8 significantly inhibited the sclerotium germination. In the presence of 160.08 μg/ml DZP8, the sporulation of M. grisea was just 9.29% of control sample; 20.14 μg/ml DZP8 inhibited the conidial germination suppression rate by 95.16%, and the appressorium formation by 100%.
文摘Phenol composition of two carnation (Dianthus caryophyllus) cvs "Gloriana" and "Roland", partially and highly resistant to F. oxysporum f. sp. dianthi, respectively, has been investigated with the aim of assessing the possible role of phenolic constituents both as biochemical markers of resistance and antifungal molecules. Analyses were performed through chromatography, NMR and MS methods. The results indicate that protocatechuic and vanillic acids are present in healthy and infected tissues of both cvs; the flavonol glycoside peltatoside. 2,6-Dimethoxybenzoic acid was detected in small amounts only in infected "Gloriana" cv while the highly resistant "Roland" cv contained the flavone datiscetin. This latter compound, due to its noticeable antifungal activity evidenced in in vitro trials, could be conceived both as a biochemical marker of resistance towards this pathogen and as a phytoanticipin.