The Experts below are selected from a list of 16026 Experts worldwide ranked by ideXlab platform
Nackdo Sung - One of the best experts on this subject based on the ideXlab platform.
-
bikaverin and fusaric acid from fusarium oxysporum show antioomycete activity against phytophthora infestans
Journal of Applied Microbiology, 2008Co-Authors: G J Choi, K S Jang, Nackdo SungAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
-
Bikaverin and fusaric acid from Fusarium oxysporum show antioomycete activity against Phytophthora infestans.
Journal of applied microbiology, 2007Co-Authors: Seung Wan Son, G J Choi, K S Jang, Nackdo Sung, Hae Young Kim, H.k. Lim, S.o. Lee, Seon-woo Lee, Jin-cheol KimAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
Jin-cheol Kim - One of the best experts on this subject based on the ideXlab platform.
-
antimicrobial activities of an oxygenated cyclohexanone derivative isolated from amphirosellinia nigrospora js 1675 against various Plant Pathogenic Bacteria and fungi
Journal of Applied Microbiology, 2019Co-Authors: Hoa Thi Nguyen, Suk Kim, Ae Ran Park, H Yoon, C H Bae, J H Yeo, In Seon Kim, Jin-cheol KimAbstract:AIMS To evaluate the antimicrobial activities of an active compound isolated from the culture broth of Amphirosellinia nigrospora JS-1675 against various Plant Pathogenic Bacteria and fungi. METHODS AND RESULTS While screening for bioactive secondary metabolites from endophytic fungi, we found that A. nigrospora JS-1675 showed strong in vitro antiBacterial activity against Ralstonia solanacearum. One compound (1) was isolated and identified as (4S, 5S, 6S)-5,6-epoxy-4-hydroxy-3-methoxy-5-methyl-cyclohex-2-en-1-one. Growth of most of the tested phytoPathogenic Bacteria was inhibited by compound 1 and the ethyl acetate (EtOAc) layer except Pseudomonas syringae pv. lachrymans. Compound 1 also inhibited the mycelial growth of several Plant Pathogenic fungi. Both compound 1 and the EtOAc layer reduced Bacterial leaf spot disease in detached peach leaves. They also suppressed the development of Bacterial wilt on tomato seedlings quite effectively. CONCLUSIONS Amphirosellinia nigrospora JS-1675 showed antimicrobial activity against Plant Pathogenic Bacteria and fungi by producing compound 1. SIGNIFICANCE AND IMPACT OF THE STUDY This is the first report on the occurrence of compound 1 in A. nigrospora JS-1675 and its efficacy against Plant Pathogenic Bacteria and fungi. Their strong disease control efficacy against tomato Bacterial wilt suggests that this fungus can be used as a microbial bactericide.
-
antiBacterial activity of pharbitin isolated from the seeds of pharbitis nil against various Plant Pathogenic Bacteria
Journal of Microbiology and Biotechnology, 2017Co-Authors: Hoa Thi Nguyen, Ae Ran Park, In Seon Kim, Hae Woong Park, Jin-cheol KimAbstract:This study aimed to isolate and characterize antiBacterial metabolites from Pharbitis nil seeds and investigate their antiBacterial activity against various Plant Pathogenic Bacteria. The methanol extract of P. nil seeds showed the strongest activity against Xanthomonas arboricola pv. pruni (Xap) with a minimum inhibition concentration (MIC) value of 250 μg/ml. Among the three solvent layers obtained from the methanol extract of P. nil seeds, only the butanol layer displayed the activity with an MIC value of 125 μg/ml against Xap. An antiBacterial fraction was obtained from P. nil seeds by repeated column chromatography and identified as pharbitin, a crude resin glycoside, by instrumental analysis. The antiBacterial activity of pharbitin was tested in vitro against 14 phytoPathogenic Bacteria, and it was found to inhibit Ralstonia solanacearum and four Xanthomonas species. The minimum inhibitory concentration values against the five Bacteria were 125-500 μg/ml for the n-butanol layer and 31.25-125 μg/ml for pharbitin. In a detached peach leaf assay, it effectively suppressed the development of Bacterial leaf spot, with a control value of 87.5% at 500 μg/ml. In addition, pharbitin strongly reduced the development of Bacterial wilt on tomato seedlings by 97.4% at 250 μg/ml, 7 days after inoculation. These findings suggest that the crude extract of P. nil seeds can be used as an alternative biopesticide for the control of Plant diseases caused by R. solanacearum and Xanthomonas spp. This is the first report on the antiBacterial activity of pharbitin against phytoPathogenic Bacteria.
-
Bikaverin and fusaric acid from Fusarium oxysporum show antioomycete activity against Phytophthora infestans.
Journal of applied microbiology, 2007Co-Authors: Seung Wan Son, G J Choi, K S Jang, Nackdo Sung, Hae Young Kim, H.k. Lim, S.o. Lee, Seon-woo Lee, Jin-cheol KimAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
G J Choi - One of the best experts on this subject based on the ideXlab platform.
-
bikaverin and fusaric acid from fusarium oxysporum show antioomycete activity against phytophthora infestans
Journal of Applied Microbiology, 2008Co-Authors: G J Choi, K S Jang, Nackdo SungAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
-
Bikaverin and fusaric acid from Fusarium oxysporum show antioomycete activity against Phytophthora infestans.
Journal of applied microbiology, 2007Co-Authors: Seung Wan Son, G J Choi, K S Jang, Nackdo Sung, Hae Young Kim, H.k. Lim, S.o. Lee, Seon-woo Lee, Jin-cheol KimAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
K S Jang - One of the best experts on this subject based on the ideXlab platform.
-
bikaverin and fusaric acid from fusarium oxysporum show antioomycete activity against phytophthora infestans
Journal of Applied Microbiology, 2008Co-Authors: G J Choi, K S Jang, Nackdo SungAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
-
Bikaverin and fusaric acid from Fusarium oxysporum show antioomycete activity against Phytophthora infestans.
Journal of applied microbiology, 2007Co-Authors: Seung Wan Son, G J Choi, K S Jang, Nackdo Sung, Hae Young Kim, H.k. Lim, S.o. Lee, Seon-woo Lee, Jin-cheol KimAbstract:Aims: To isolate and identify antioomycete substances from Fusarium oxysporum EF119 against Phytophthora infestans and to investigate their antimicrobial activities against various Plant Pathogenic Bacteria, oomycetes and true fungi. Methods and Results: Two antioomycete substances were isolated from liquid cultures of F. oxysporum EF119, which shows a potent disease control efficacy against tomato late blight caused by P. infestans. They were identified as bikaverin and fusaric acid by mass and nuclear magnetic resonance spectral analyses. They inhibited the mycelial growth of Plant Pathogenic oomycetes and fungi. Fusaric acid also effectively suppressed the cell growth of various Plant Pathogenic Bacteria, but bikaverin was virtually inactive. Treatment with bikaverin at 300 μg ml−1 suppressed the development of tomato late blight by 71%. Fusaric acid provided effective control against tomato late blight and wheat leaf rust over 67% at concentrations more than 100 μg ml−1. Conclusions: Both bikaverin and fusaric acid showed in vitro and in vivo antioomycete activity against P. infestans. Significance and Impact of the Study: Fusarium oxysporum EF119 producing both bikaverin and fusaric acid may be used as a biocontrol agent against tomato late blight caused by P. infestans.
Christian Vernière - One of the best experts on this subject based on the ideXlab platform.
-
Deciphering how Plant Pathogenic Bacteria disperse and meet: Molecular epidemiology of Xanthomonas citri pv. citri at microgeographic scales in a tropical area of Asiatic citrus canker endemicity
Evolutionary Applications, 2019Co-Authors: Olivier Pruvost, Karine Boyer, Virginie Ravigné, Damien Richard, Christian VernièreAbstract:Although some Plant Pathogenic Bacteria represent a significant threat to agriculture, the determinants of their ecological success and evolutionary potential are still poorly understood. Refining our understanding of Bacterial strain circulation at small spatial scales and the biological significance and evolutionary consequences of co-infections are key questions. The study of Bacterial population biology can be challenging, because it requires high-resolution markers that can be genotyped with a high throughput. Here, we overcame this difficulty for Xanthomonas citri pv. citri, a genetically monomorphic bacterium causing Asiatic citrus canker (ACC). Using a genotyping method that did not require cultivating the bacterium or purifying DNA, we deciphered the pathogen's spatial genetic structure at several microgeographic scales, down to single lesion, in a situation of ACC endemicity. In a grove where copper was recurrently applied for ACC management, copper-susceptible and copper-resistant X. citri pv. citri coexisted and the Bacterial population structured as three genetic clusters, suggesting a polyclonal contamination. The range of spatial dependency, estimated for the two largest clusters, was four times greater for the cluster predominantly composed of copper-resistant Bacteria. Consistently, the evenness value calculated for this cluster was indicative of increased transmission. Linkage disequilibrium was high even at a tree scale, probably due to a combination of clonality and admixture. Approximately 1% of samples exhibited within-lesion multilocus polymorphism, explained at least in part by polyclonal infections. Canker lesions, which are of major biological significance as an inoculum source, may also represent a preferred niche for horizontal gene transfer. This study points out the potential of genotyping data for estimating the range of spatial dependency of Plant Bacterial pathogens, an important parameter for guiding disease management strategies.
