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Nigel L Hywel-jones - One of the best experts on this subject based on the ideXlab platform.
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A combined ITS rDNA and β-tubulin phylogeny of Thai species of Hypocrella with non-fragmenting ascospores
Fungal Biology, 2009Co-Authors: Suchada Mongkolsamrit, Joseph W. Spatafora, Giho Sung, J. Jennifer Luangsa-ard, Nigel L Hywel-jonesAbstract:A combined ITS and β-tubulin gene phylogeny has revealed new species of Hypocrella and Aschersonia related to the type species Hypocrella discoidea from natural forest in Thailand. As a result, Hypocrella calendulina and Hypocrella luteola are named as new species with Aschersonia sensu stricto anamorphs for specimens previously identified as Hypocrella discoidea sensu Petch. Hypocrella siamensis and Aschersonia minutispora are described as new species, both exhibiting brown stromata, with the former producing whole ascospores.
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A combined ITS rDNA and beta-tubulin phylogeny of Thai species of Hypocrella with non-fragmenting ascospores.
Mycological research, 2009Co-Authors: Suchada Mongkolsamrit, Joseph W. Spatafora, Giho Sung, J. Jennifer Luangsa-ard, Nigel L Hywel-jonesAbstract:A combined ITS and beta-tubulin gene phylogeny has revealed new species of Hypocrella and Aschersonia related to the type species Hypocrella discoidea from natural forest in Thailand. As a result, Hypocrella calendulina and Hypocrella luteola are named as new species with Aschersonia sensu stricto anamorphs for specimens previously identified as Hypocrella discoidea sensu Petch. Hypocrella siamensis and Aschersonia minutispora are described as new species, both exhibiting brown stromata, with the former producing whole ascospores.
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Hopane triterpenes as chemotaxonomic markers for the scale insect pathogens Hypocrella s. lat. and Aschersonia.
Mycological research, 2009Co-Authors: Masahiko Isaka, Nigel L Hywel-jones, Suchada Mongkolsamrit, Malipan Sappan, Sarawut SaidaengkhamAbstract:The scale insect pathogens Hypocrella s. lat. and their Aschersonia anamorphs, collected at various locations in Thailand, were surveyed for their productivity of three hopane triterpenes, zeorin (6alpha,22-dihydroxyhopane), dustanin (15alpha,22-dihydroxyhopane), and 3beta-acetoxy-15alpha,22-dihydroxyhopane, when cultured in a liquid medium (potato-dextrose broth) under static conditions. Among 53 strains of Aschersonia species, 48 strains (91 %) produced at least one of these compounds. Hypocrella and Moelleriella species (43 strains) also frequently produced these triterpenoids; only two strains lacked all of these triterpenes. The results demonstrate that hopane triterpenes may be suitable for use as chemotaxonomic markers for Hypocrella and Moelleriella species and their Aschersonia anamorphs.
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Hopane triterpenes as chemotaxonomic markers for the scale insect pathogens Hypocrella s. lat. and Aschersonia.
Mycological Research, 2009Co-Authors: Masahiko Isaka, Nigel L Hywel-jones, Suchada Mongkolsamrit, Malipan Sappan, Sarawut SaidaengkhamAbstract:Abstract The scale insect pathogens Hypocrella s. lat. and their Aschersonia anamorphs, collected at various locations in Thailand, were surveyed for their productivity of three hopane triterpenes, zeorin (6α,22-dihydroxyhopane), dustanin (15α,22-dihydroxyhopane), and 3β-acetoxy-15α,22-dihydroxyhopane, when cultured in a liquid medium (potato–dextrose broth) under static conditions. Among 53 strains of Aschersonia species, 48 strains (91 %) produced at least one of these compounds. Hypocrella and Moelleriella species (43 strains) also frequently produced these triterpenoids; only two strains lacked all of these triterpenes. The results demonstrate that hopane triterpenes may be suitable for use as chemotaxonomic markers for Hypocrella and Moelleriella species and their Aschersonia anamorphs.
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Phylogenetic evidence for an animal pathogen origin of ergot and the grass endophytes
Molecular Ecology, 2007Co-Authors: Joseph W. Spatafora, Nigel L Hywel-jones, Giho Sung, Jaemo Sung, Jf WhiteAbstract:Grass-associated fungi (grass symbionts) in the family Clavicipitaceae (Ascomycota, Hypocreales) are species whose host range is restricted to the plant family Poaceae and rarely Cyperaceae. The best-characterized species include Claviceps purpurea (ergot of rye) and Neotyphodium coenophialum (endophyte of tall fescue). They have been the focus of considerable research due to their importance in agricultural and grassland ecosystems and the diversity of their bioactive secondary metabolites. Here we show through multigene phylogenetic analyses and ancestral character state reconstruction that the grass symbionts in Clavicipitaceae are a derived group that originated from an animal pathogen through a dynamic process of interkingdom host jumping. The closest relatives of the grass symbionts include the genera Hypocrella , a pathogen of scale insects and white flies, and Metarhizium , a generalist arthropod pathogen. These data do not support the monophyly of Clavicipitaceae, but place it as part of a larger clade that includes Hypocreaceae, a family that contains mainly parasites of other fungi. A minimum of 5–8 independent and unidirectional interkingdom host jumps has occurred among clavicipitaceous fungi, including 3–5 to fungi, 1–2 to animals, and 1 to plants. These findings provide a new evolutionary context for studying the biology of the grass symbionts, their role in plant ecology, and the evolution of host affiliation in fungal symbioses.
C Sengonca - One of the best experts on this subject based on the ideXlab platform.
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Potential of different isolates of entomopathogenic fungi from Thailand as biological control agents against western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)
Journal of Plant Diseases and Protection, 2006Co-Authors: C Sengonca, Malee Thungrabeab, Peter BlaeserAbstract:Das Ziel der vorliegenden Arbeit war, die Eignung von 41 aus unterschiedlichen Wirten in Thailand isolierten entomopathogenen Pilzen aus 25 Arten von 11 Genera zur biologischen Schädlingsbekämpfung des Kalifornischen Blütenthrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) zu untersuchen. Zunächst wurde die Pathogenität aller Isolate gegenüber dem ersten Larvenstadium von F. occidentalis in der gleichen Konzentration ermittelt. Die Ergebnisse zeigten, dass 37 der 41 Isolate von Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii und Verticillium spp. eine Pathogenität gegenüber F. occidentalis aufwiesen, während die Isolate von Hynennostilbe sp., Torrubiella tenuis , Hypocrella discoidea und Cordyceps pseudomilit nicht pathogen waren. Insgesamt variierte die Pathogenität aller untersuchten Pilze signifikant zwischen den Isolaten und ließ sich aufgrund dessen in drei Pathogenitätsgruppen unterteilen. Die Gruppe mit der höchsten Pathogenität beinhaltete 14 Isolate, von denen sechs aus der Gattung Beauveria , vier aus der Gattung Metarhizium , drei aus der Gattung Paecilomyces und ein Isolat aus der Gattung Cordyceps als virulent ermittelt wurden. Als nächstes wurden diese 14 virulenten Isolate auf ihre Wirksamkeit gegen das erste Lavenstadium des Schädlings in mehreren Konzentrationen getestet. Es konnte festgestellt werden, dass die ermittelten LC_50-Werte der Isolate beträchtlich zwischen den unterschiedlichen Isolaten der Pilze schwankten. So variierten die LC_50-Werte von Beauveria spp. zwischen 2,39 × 10^4 und 5,89 × 10^6 Konidien/ml, die von Metarhizium spp. zwischen 2,00 × 10^4 und 5,00 × 10^5 Konidien/ml, die von Paecilomyces spp. zwischen 3,89 × 10^4 und 5,49 × 10^6 Konidien/ml und die von Cordyceps sp. lagen bei 4,67 × 10^5 Konidien/ml. Fünf Isolate mit LC_50-Werten niedriger als 6,61 × 10^4 wurden als hoch virulent identifiziert, und zwar zwei Isolate von B. bassiana , zwei Isolate der Gattung Metarhizium und ein Isolat von P. fumosoroseus . Abschließend erfolgte eine Untersuchung zur Wirksamkeit der fünf hoch virulenten Isolate gegenüber den unterschiedlichen Entwicklungsstadien von F. occidentalis . Die Applikationen der fünf Pilzisolate zeigten unterschiedliche Virulenzen gegenüber den unterschiedlichen Entwicklungsstadien des Schädlings. Am anfälligsten gegenüber den Isolaten erwiesen sich die Larvenstadien, gefolgt von den Puppen und Adulten von F. occidentalis . The present study aimed to investigate the potential of 41 entomopathogenic fungal isolates, belonging to 25 species from 11 genera isolated from different hosts in Thailand, as biological control agents against the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Firstly, pathogenicities of all isolates were assessed with single concentration against first instar larvae of F. occidentalis . The results showed that 37 out of 41 isolates, belonging to Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii and Verticillium spp., were pathogenic to F. occidentalis , while Hynennostilbe sp., Torrubiella tenuis, Hypocrella discoidea and Cordyceps pseudomilit were non-pathogenic. In general, the pathogenicities of all fungi varied significantly according to the fungal isolate, and could be classified into three pathogenicity levels. High pathogenicity level contained 14 isolates: six isolates of Beauveria , four isolates of Metarhizium , three isolates of Paecilomyces and one isolate of Cordyceps were identified as virulent isolates. Secondly, the 14 virulent isolates were screened with multiple concentrations against the first instars larvae. It was found that LC_50 values of the isolates varied considerably among fungal isolate, e.g. the LC_50 values of Beauveria spp. ranged from 2.39 × 10^4 to 5.89 × 10^6 conidia/ml, Metarhizium spp. from 2.00 × 10^4 to 5.00 × 10^5 conidia/ml, Paecilomyces spp. from 3.89 × 10^4 to 5.49 × 10^6 conidia/ml, and Cordyceps sp. LC_50 was 4.67 × 10^5 conidia/ml. Five isolates with LC_50 lower than 6.61 × 10^4, i.e. two isolates of B. bassiana , two isolates of Metarhizium and one isolate of P. fumosoroseus displayed highest virulence isolates. Finally, the efficiency of the isolates with high virulence was investigated against various developmental stages of F. occidentalis . The virulence of these five entomopathogenic fungi differed at different developmental stages of F. occidentalis . The susceptibility of developmental stages to the entomopathogenic fungi decreased from larvae over pupae to adults.
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possibilities for biocontrol of the onion thrips thrips tabaci lindeman thys thripidae using different entomopathogenic fungi from thailand
2006Co-Authors: Malee Thungrabeab, Peter Blaeser, C SengoncaAbstract:Thrips tabaci LINDEMAN (Thys., Thripidae) ist ein weltweit verbreiteter Schadling mit einem breiten Wirtspflanzenspektrum an verschiedenen Freiland und Gewachshauskulturen, dessen Bekampfung durch die geringe Grose und ihre versteckte Lebensweise erschwert wird. Entomopathogene Pilze sind wichtige Krankheitserreger zahlreicher Insektenarten und infizieren Individuen verschiedenen Alters und verschiedener Entwicklungsstufen. In der vorliegenden Studie wurden 41 Isolate von 25 entomopathogenen Pilzarten aus 11 Gattungen (Akanthomyces, Aschersonia, Beauveria, Cordyceps, Hirsutella, Hymenostilbe, Hypocrella, Metarhizium, Paecilomyces, Torrubiella und Verticillium) auf ihre Pathogenitat gegenuber T. tabaci-Larven untersucht. Bis auf Hymenostilbe sp., Torrubiella spp., Hypocrella discoidea und Cordyceps pseudomilitaris stellten sich alle Pilze als Pathogen fur T. tabaci heraus. Zwischen den Isolaten wurden hoch signifikante Unterschiede festgestellt. Die Mortalitat variierte je nach Pilzart, Pilzgattung und Isolat. Funfzehn Isolate, 7 von Beauveria, 4 von Metarhizium, 3 von Paecilomyces und 1 von Cordyceps, wiesen die hochste Pathogenitat gegenuber T. tabaci-Larven auf.
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Potential of different isolates of entomopathogenic fungi from Thailand as biological control agents against western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)
Journal of Plant Diseases and Protection, 2006Co-Authors: C Sengonca, Malee Thungrabeab, Peter BlaeserAbstract:The present study aimed to investigate the potential of 41 entomopathogenic fungal isolates, belonging to 25 species from 11 genera isolated from different hosts in Thailand, as biological control agents against the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Firstly, pathogenicities of all isolates were assessed with single concentration against first instar larvae of F. occidentalis. The results showed that 37 out of 41 isolates, belonging to Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii and Verticillium spp., were pathogenic to F. occidentalis, while Hynennostilbe sp., Torrubiella tenuis, Hypocrella discoidea and Cordyceps pseudomilit were non-pathogenic. In general, the pathogenicities of all fungi varied significantly according to the fungal isolate, and could be classified into three pathogenicity levels. High pathogenicity level contained 14 isolates: six isolates of Beauveria, four isolates of Metarhizium, three isolates of Paecilomyces and one isolate of Cordyceps were identified as virulent isolates.
Peter Blaeser - One of the best experts on this subject based on the ideXlab platform.
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Potential of different isolates of entomopathogenic fungi from Thailand as biological control agents against western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)
Journal of Plant Diseases and Protection, 2006Co-Authors: C Sengonca, Malee Thungrabeab, Peter BlaeserAbstract:Das Ziel der vorliegenden Arbeit war, die Eignung von 41 aus unterschiedlichen Wirten in Thailand isolierten entomopathogenen Pilzen aus 25 Arten von 11 Genera zur biologischen Schädlingsbekämpfung des Kalifornischen Blütenthrips Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) zu untersuchen. Zunächst wurde die Pathogenität aller Isolate gegenüber dem ersten Larvenstadium von F. occidentalis in der gleichen Konzentration ermittelt. Die Ergebnisse zeigten, dass 37 der 41 Isolate von Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii und Verticillium spp. eine Pathogenität gegenüber F. occidentalis aufwiesen, während die Isolate von Hynennostilbe sp., Torrubiella tenuis , Hypocrella discoidea und Cordyceps pseudomilit nicht pathogen waren. Insgesamt variierte die Pathogenität aller untersuchten Pilze signifikant zwischen den Isolaten und ließ sich aufgrund dessen in drei Pathogenitätsgruppen unterteilen. Die Gruppe mit der höchsten Pathogenität beinhaltete 14 Isolate, von denen sechs aus der Gattung Beauveria , vier aus der Gattung Metarhizium , drei aus der Gattung Paecilomyces und ein Isolat aus der Gattung Cordyceps als virulent ermittelt wurden. Als nächstes wurden diese 14 virulenten Isolate auf ihre Wirksamkeit gegen das erste Lavenstadium des Schädlings in mehreren Konzentrationen getestet. Es konnte festgestellt werden, dass die ermittelten LC_50-Werte der Isolate beträchtlich zwischen den unterschiedlichen Isolaten der Pilze schwankten. So variierten die LC_50-Werte von Beauveria spp. zwischen 2,39 × 10^4 und 5,89 × 10^6 Konidien/ml, die von Metarhizium spp. zwischen 2,00 × 10^4 und 5,00 × 10^5 Konidien/ml, die von Paecilomyces spp. zwischen 3,89 × 10^4 und 5,49 × 10^6 Konidien/ml und die von Cordyceps sp. lagen bei 4,67 × 10^5 Konidien/ml. Fünf Isolate mit LC_50-Werten niedriger als 6,61 × 10^4 wurden als hoch virulent identifiziert, und zwar zwei Isolate von B. bassiana , zwei Isolate der Gattung Metarhizium und ein Isolat von P. fumosoroseus . Abschließend erfolgte eine Untersuchung zur Wirksamkeit der fünf hoch virulenten Isolate gegenüber den unterschiedlichen Entwicklungsstadien von F. occidentalis . Die Applikationen der fünf Pilzisolate zeigten unterschiedliche Virulenzen gegenüber den unterschiedlichen Entwicklungsstadien des Schädlings. Am anfälligsten gegenüber den Isolaten erwiesen sich die Larvenstadien, gefolgt von den Puppen und Adulten von F. occidentalis . The present study aimed to investigate the potential of 41 entomopathogenic fungal isolates, belonging to 25 species from 11 genera isolated from different hosts in Thailand, as biological control agents against the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Firstly, pathogenicities of all isolates were assessed with single concentration against first instar larvae of F. occidentalis . The results showed that 37 out of 41 isolates, belonging to Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii and Verticillium spp., were pathogenic to F. occidentalis , while Hynennostilbe sp., Torrubiella tenuis, Hypocrella discoidea and Cordyceps pseudomilit were non-pathogenic. In general, the pathogenicities of all fungi varied significantly according to the fungal isolate, and could be classified into three pathogenicity levels. High pathogenicity level contained 14 isolates: six isolates of Beauveria , four isolates of Metarhizium , three isolates of Paecilomyces and one isolate of Cordyceps were identified as virulent isolates. Secondly, the 14 virulent isolates were screened with multiple concentrations against the first instars larvae. It was found that LC_50 values of the isolates varied considerably among fungal isolate, e.g. the LC_50 values of Beauveria spp. ranged from 2.39 × 10^4 to 5.89 × 10^6 conidia/ml, Metarhizium spp. from 2.00 × 10^4 to 5.00 × 10^5 conidia/ml, Paecilomyces spp. from 3.89 × 10^4 to 5.49 × 10^6 conidia/ml, and Cordyceps sp. LC_50 was 4.67 × 10^5 conidia/ml. Five isolates with LC_50 lower than 6.61 × 10^4, i.e. two isolates of B. bassiana , two isolates of Metarhizium and one isolate of P. fumosoroseus displayed highest virulence isolates. Finally, the efficiency of the isolates with high virulence was investigated against various developmental stages of F. occidentalis . The virulence of these five entomopathogenic fungi differed at different developmental stages of F. occidentalis . The susceptibility of developmental stages to the entomopathogenic fungi decreased from larvae over pupae to adults.
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possibilities for biocontrol of the onion thrips thrips tabaci lindeman thys thripidae using different entomopathogenic fungi from thailand
2006Co-Authors: Malee Thungrabeab, Peter Blaeser, C SengoncaAbstract:Thrips tabaci LINDEMAN (Thys., Thripidae) ist ein weltweit verbreiteter Schadling mit einem breiten Wirtspflanzenspektrum an verschiedenen Freiland und Gewachshauskulturen, dessen Bekampfung durch die geringe Grose und ihre versteckte Lebensweise erschwert wird. Entomopathogene Pilze sind wichtige Krankheitserreger zahlreicher Insektenarten und infizieren Individuen verschiedenen Alters und verschiedener Entwicklungsstufen. In der vorliegenden Studie wurden 41 Isolate von 25 entomopathogenen Pilzarten aus 11 Gattungen (Akanthomyces, Aschersonia, Beauveria, Cordyceps, Hirsutella, Hymenostilbe, Hypocrella, Metarhizium, Paecilomyces, Torrubiella und Verticillium) auf ihre Pathogenitat gegenuber T. tabaci-Larven untersucht. Bis auf Hymenostilbe sp., Torrubiella spp., Hypocrella discoidea und Cordyceps pseudomilitaris stellten sich alle Pilze als Pathogen fur T. tabaci heraus. Zwischen den Isolaten wurden hoch signifikante Unterschiede festgestellt. Die Mortalitat variierte je nach Pilzart, Pilzgattung und Isolat. Funfzehn Isolate, 7 von Beauveria, 4 von Metarhizium, 3 von Paecilomyces und 1 von Cordyceps, wiesen die hochste Pathogenitat gegenuber T. tabaci-Larven auf.
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Potential of different isolates of entomopathogenic fungi from Thailand as biological control agents against western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)
Journal of Plant Diseases and Protection, 2006Co-Authors: C Sengonca, Malee Thungrabeab, Peter BlaeserAbstract:The present study aimed to investigate the potential of 41 entomopathogenic fungal isolates, belonging to 25 species from 11 genera isolated from different hosts in Thailand, as biological control agents against the western flower thrips, Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae). Firstly, pathogenicities of all isolates were assessed with single concentration against first instar larvae of F. occidentalis. The results showed that 37 out of 41 isolates, belonging to Akanthomyces sp., Aschersonia spp., Beauveria spp., Cordyceps sp., Hirsutella spp., Metarhizium spp., Paecilomyces spp., Torrubiella petchii and Verticillium spp., were pathogenic to F. occidentalis, while Hynennostilbe sp., Torrubiella tenuis, Hypocrella discoidea and Cordyceps pseudomilit were non-pathogenic. In general, the pathogenicities of all fungi varied significantly according to the fungal isolate, and could be classified into three pathogenicity levels. High pathogenicity level contained 14 isolates: six isolates of Beauveria, four isolates of Metarhizium, three isolates of Paecilomyces and one isolate of Cordyceps were identified as virulent isolates.
Pengfei Wang - One of the best experts on this subject based on the ideXlab platform.
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synthesis of carbon dots from Hypocrella bambusae for bimodel fluorescence photoacoustic imaging guided synergistic photodynamic photothermal therapy of cancer
Journal of Colloid and Interface Science, 2018Co-Authors: Qingyan Jia, Xiuli Zheng, Weimin Liu, Haohui Ren, Shiqing Chen, Yongmei Wen, Hongyan Zhang, Pengfei WangAbstract:Abstract As phototheranostic agents, carbon dots (CDs), have recently drawn considerable attention due to their excellent physicochemical properties. However, the complex synthetic route and high-cost of CDs greatly limit their practical application. To address this issue, given their nearly infinite supply from nature, Hypocrella bambusae is used as the precursor for the preparation of CDs in this study. The obtained Hypocrella bambusae CDs (HBCDs) possess good water solubility, broad absorption (350–800 nm), red-light emission (maximum peak at 610 nm), and low biotoxicity. Moreover, HBCDs can highly generate 1O2 (0.38) and heat (27.6%) under 635 nm laser irradiation. These excellent properties of HBCDs capacitate them to be utilized for bimodal fluorescence/photoacoustic imaging-guided synergistic photodynamic therapy (PDT)/photothermal therapy (PTT). This work provides a new candidate for tumor treatment with the combination of PDT and PTT, and explores a novel approach for the preparation of CD-based phototheranostic agents with natural biomass as raw carbon sources.
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Synthesis of carbon dots from Hypocrella bambusae for bimodel fluorescence/photoacoustic imaging-guided synergistic photodynamic/photothermal therapy of cancer.
Journal of colloid and interface science, 2018Co-Authors: Qingyan Jia, Xiuli Zheng, Weimin Liu, Haohui Ren, Shiqing Chen, Yongmei Wen, Hongyan Zhang, Pengfei WangAbstract:Abstract As phototheranostic agents, carbon dots (CDs), have recently drawn considerable attention due to their excellent physicochemical properties. However, the complex synthetic route and high-cost of CDs greatly limit their practical application. To address this issue, given their nearly infinite supply from nature, Hypocrella bambusae is used as the precursor for the preparation of CDs in this study. The obtained Hypocrella bambusae CDs (HBCDs) possess good water solubility, broad absorption (350–800 nm), red-light emission (maximum peak at 610 nm), and low biotoxicity. Moreover, HBCDs can highly generate 1O2 (0.38) and heat (27.6%) under 635 nm laser irradiation. These excellent properties of HBCDs capacitate them to be utilized for bimodal fluorescence/photoacoustic imaging-guided synergistic photodynamic therapy (PDT)/photothermal therapy (PTT). This work provides a new candidate for tumor treatment with the combination of PDT and PTT, and explores a novel approach for the preparation of CD-based phototheranostic agents with natural biomass as raw carbon sources.
Suchada Mongkolsamrit - One of the best experts on this subject based on the ideXlab platform.
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Pyridone alkaloids from the scale-insect pathogenic fungus Hypocrella discoidea BCC 71382
Tetrahedron Letters, 2018Co-Authors: Masahiko Isaka, Suchada Mongkolsamrit, Rachada Haritakun, Sumalee Supothina, Tao Feng, Ji-kai LiuAbstract:Abstract Hypocrellutins A–C (1–3), 2- and 4-pyridone alkaloids, were isolated from cultures of the scale-insect pathogenic fungus Hypocrella discoidea BCC 71382. The structures were elucidated on the basis of NMR spectroscopic and mass spectrometry data. The absolute configuration of hypocrellutin B (2) was determined by ECD calculation. Their plausibly biosynthetic pathways are proposed. All isolated compounds were inactive in the antifungal, antimalarial, antitubercular, and cytotoxic activity assays.
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Clavicipitaceous entomopathogens: new species in Metarhizium and a new genus Nigelia
Mycological Progress, 2017Co-Authors: J Jennifer Luangsa-ard, Suchada Mongkolsamrit, Wasana Noisripoom, Donnaya Thanakitpipattana, Kanoksri Tasanathai, Artit Khonsanit, Richard A. HumberAbstract:In several surveys in the tropical forests in Thailand, specimens that looked morphologically similar to Metarhizium martiale and Cordyceps variegata, as well as other Metarhizium species were collected and cultured in vitro. A combined phylogeny of several genes including the small (18S) and large (28S) subunits of the ribosomal DNA, elongation factor 1-α (TEF), RNA polymerase II subunits 1 and 2 (RPB1, RPB2) genes has shown these to be new taxa in the Clavicipitaceae. Nigelia is described as a new genus closely related to Metarhizium, to the scale insect pathogens Aschersonia (Hypocrella), Samuelsia and Moelleriella, and to plant pathogens in Claviceps and Balansia, and other relatives. Nigelia comprises M. martiale and a new species Nigelia aurantiaca, which has been found infecting lepidopteran larvae and which produces pseudoimmersed, obliquely arranged, obpyriform perithecia with curved or bent ostioles and with whole (non-separating) cylindric ascospores. Metarhizium chaiyaphumense, M. kalasinense, M. prachinense, M. samlanense, and M. takense are described as new species of Metarhizium. Metarhizium martiale is transferred to Nigelia, and Paecilomyces reniformis is transferred to Metarhizium.
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A combined ITS rDNA and β-tubulin phylogeny of Thai species of Hypocrella with non-fragmenting ascospores
Fungal Biology, 2009Co-Authors: Suchada Mongkolsamrit, Joseph W. Spatafora, Giho Sung, J. Jennifer Luangsa-ard, Nigel L Hywel-jonesAbstract:A combined ITS and β-tubulin gene phylogeny has revealed new species of Hypocrella and Aschersonia related to the type species Hypocrella discoidea from natural forest in Thailand. As a result, Hypocrella calendulina and Hypocrella luteola are named as new species with Aschersonia sensu stricto anamorphs for specimens previously identified as Hypocrella discoidea sensu Petch. Hypocrella siamensis and Aschersonia minutispora are described as new species, both exhibiting brown stromata, with the former producing whole ascospores.
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A combined ITS rDNA and beta-tubulin phylogeny of Thai species of Hypocrella with non-fragmenting ascospores.
Mycological research, 2009Co-Authors: Suchada Mongkolsamrit, Joseph W. Spatafora, Giho Sung, J. Jennifer Luangsa-ard, Nigel L Hywel-jonesAbstract:A combined ITS and beta-tubulin gene phylogeny has revealed new species of Hypocrella and Aschersonia related to the type species Hypocrella discoidea from natural forest in Thailand. As a result, Hypocrella calendulina and Hypocrella luteola are named as new species with Aschersonia sensu stricto anamorphs for specimens previously identified as Hypocrella discoidea sensu Petch. Hypocrella siamensis and Aschersonia minutispora are described as new species, both exhibiting brown stromata, with the former producing whole ascospores.
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Hopane triterpenes as chemotaxonomic markers for the scale insect pathogens Hypocrella s. lat. and Aschersonia.
Mycological research, 2009Co-Authors: Masahiko Isaka, Nigel L Hywel-jones, Suchada Mongkolsamrit, Malipan Sappan, Sarawut SaidaengkhamAbstract:The scale insect pathogens Hypocrella s. lat. and their Aschersonia anamorphs, collected at various locations in Thailand, were surveyed for their productivity of three hopane triterpenes, zeorin (6alpha,22-dihydroxyhopane), dustanin (15alpha,22-dihydroxyhopane), and 3beta-acetoxy-15alpha,22-dihydroxyhopane, when cultured in a liquid medium (potato-dextrose broth) under static conditions. Among 53 strains of Aschersonia species, 48 strains (91 %) produced at least one of these compounds. Hypocrella and Moelleriella species (43 strains) also frequently produced these triterpenoids; only two strains lacked all of these triterpenes. The results demonstrate that hopane triterpenes may be suitable for use as chemotaxonomic markers for Hypocrella and Moelleriella species and their Aschersonia anamorphs.