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Ke-qin Zhang - One of the best experts on this subject based on the ideXlab platform.
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Novel Polyketide-Terpenoid Hybrid Metabolites and Increased Fungal Nematocidal Ability by Disruption of Genes 277 and 279 in Nematode-Trapping Fungus Arthrobotrys oligospora.
Journal of agricultural and food chemistry, 2020Co-Authors: Yong-hong Chen, Ke-qin Zhang, Xiao Liu, Rong Dai, Xue-mei NiuAbstract:Nematode-trapping fungus Arthrobotrys oligospora can produce a type of sesquiterpenyl epoxy-cyclohexenoid (SEC) metabolites that are regarded as characteristic chemtaxonomic markers. Here we report...
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Funding information
2016Co-Authors: Ying Zhang, Min Qiao, Yang Cao, Ke-qin ZhangAbstract:Genetic diversity and recombination in natural populations of the nematode-trapping fungus Arthrobotrys oligospora from Chin
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Nematode-trapping fungi and fungus-associated bacteria interactions: the role of bacterial diketopiperazines and biofilms on Arthrobotrys oligospora surface in hyphal morphogenesis.
Environmental microbiology, 2016Co-Authors: Min Yang, Jun Luo, Ying Chen, Lianming Liang, Ke-qin ZhangAbstract:Summary In soil, nematode-trapping fungi and bacteria often share microhabitats and interact with each other, but effects of fungus-associated bacteria on its trap formation are underestimated. We have ascertained the presence of Stenotrophomonas and Rhizobium genera associated with A. oligospora GJ-1. After A. oligospora GJ-1 without associated bacteria (cured Arthrobotrys) was co-cultivated with Stenotrophomonas and its supernatant extract, microscopic study of hyphae from co-cultivation indicated that bacterial biofilm formation on hyphae was related to trap formation in fungi and Stenotrophomonas supernatant extract. Four diketopiperazines (DKPs) were purified from Stenotrophomonas supernatant extract that could not induce traps in the cured Arthrobotrys. When cured Arthrobotrys was cultured with Stenotrophomonas and one of DKPs, polar attachment, bacterial biofilms on hyphae and trap formation in fungi were observed. After cured Arthrobotrys with bacterial biofilms was consecutively transferred several times on nutrient poor medium, trap formation disappeared with the disappearance of bacterial biofilms on hyphae. DKPs could facilitate chemotaxis of Stenotrophomonas towards fungal extract which was suggested to contribute to bacterial biofilms on hyphae. Furthermore, when cured Arthrobotrys was cultured with Stenotrophomonas and DKPs in soil, trap formation in fungi and bacterial biofilms on hyphae were also observed, and the fungal activity against nematode was enhanced.
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Morphology Regulatory Metabolites from Arthrobotrys oligospora
Journal of natural products, 2012Co-Authors: Hui-xiang Zhang, Ke-qin Zhang, Ying Zhang, Lu-xia Wei, Jian-lin Tan, Yan-li Wang, Chuan-ping Zhang, Chun-yan Zhu, Xue-mei NiuAbstract:Novel autoregulatory metabolites, arthrosporols A–C (1–3), involved in regulating the morphological switch in fungi, were purified and characterized from the carnivorous fungus Arthrobotrys oligospora. These compounds possess a novel hybrid carbon skeleton consisting of an epoxy-cyclohexenol combined with a rare monocyclic sesquiterpenol substructure. This is the first report of a monocyclic sesquiterpenol of this type of fungal origin. Compounds 1–3 displayed significant inhibitory activities toward the formation of conidiophores, while compounds 1 and 3 showed the opposite effects on the formation of a two-dimensional network with increasing rates of 40–90% and inhibiting rates of 30–90%, respectively.
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Arthrobotrisins A-C, oligosporons from the nematode-trapping fungus Arthrobotrys oligospora.
Journal of natural products, 2011Co-Authors: Lu-xia Wei, Ying Zhang, Xue-mei Niu, Hui-xiang Zhang, Jian-lin Tan, Yan-sheng Chu, Hua-xi Xue, Yan-li Wang, Ke-qin ZhangAbstract:Arthrobotrys oligospora is a carnivorous fungus that can use mycelia trapping devices to capture their prey. Three novel oligosporons, named arthrobotrisins A–C (1–3), were isolated from A. oligospora and identified by spectroscopic analysis in combination with X-ray diffraction. This is the first time that the relative configuration of naturally occurring oligosporon metabolites has been fully determined. Compound 3 exhibited specific antibacterial activities.
D S Murray - One of the best experts on this subject based on the ideXlab platform.
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Preparation of the nematode-trapping fungus, Arthrobotrys oligospora, for scanning electron microscopy by freeze substitution.
Journal of microscopy, 1990Co-Authors: D A Wharton, D S MurrayAbstract:A freeze-substitution technique for preparing fungal specimens for scanning electron microscopy is described. This involves cryofixation in liquid nitrogen, freeze substitution in methanol at -20 degrees C and critical-point drying. The trapping complexes and conidiophores of the nematophagous fungus Arthrobotrys oligospora are well preserved and retain their normal three-dimensional arrangement.
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Preparation of the nematode‐trapping fungus, Arthrobotrys oligospora, for scanning electron microscopy by freeze substitution
Journal of Microscopy, 1990Co-Authors: D A Wharton, D S MurrayAbstract:SUMMARY A freeze-substitution technique for preparing fungal specimens for scanning electron microscopy is described. This involves cryofixation in liquid nitrogen, freeze substitution in methanol at — 20°C and critical-point drying. The trapping complexes and conidiophores of the nematophagous fungus Arthrobotrys oligospora are well preserved and retain their normal three-dimensional arrangement.
D A Wharton - One of the best experts on this subject based on the ideXlab platform.
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Preparation of the nematode-trapping fungus, Arthrobotrys oligospora, for scanning electron microscopy by freeze substitution.
Journal of microscopy, 1990Co-Authors: D A Wharton, D S MurrayAbstract:A freeze-substitution technique for preparing fungal specimens for scanning electron microscopy is described. This involves cryofixation in liquid nitrogen, freeze substitution in methanol at -20 degrees C and critical-point drying. The trapping complexes and conidiophores of the nematophagous fungus Arthrobotrys oligospora are well preserved and retain their normal three-dimensional arrangement.
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Preparation of the nematode‐trapping fungus, Arthrobotrys oligospora, for scanning electron microscopy by freeze substitution
Journal of Microscopy, 1990Co-Authors: D A Wharton, D S MurrayAbstract:SUMMARY A freeze-substitution technique for preparing fungal specimens for scanning electron microscopy is described. This involves cryofixation in liquid nitrogen, freeze substitution in methanol at — 20°C and critical-point drying. The trapping complexes and conidiophores of the nematophagous fungus Arthrobotrys oligospora are well preserved and retain their normal three-dimensional arrangement.
Jackson Victor De Araujo - One of the best experts on this subject based on the ideXlab platform.
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Arthrobotrys cladodes and Pochonia chlamydosporia: Nematicidal effects of single and combined use after passage through cattle gastrointestinal tract.
Experimental Parasitology, 2020Co-Authors: Ítalo Stoupa Vieira, Artur Kanadani Campos, Isabela De Castro Oliveira, Jackson Victor De AraujoAbstract:Abstract Nematodiosis are responsible for financial losses in cattle production systems due to treatment costs, falling production rates and animal deaths. The incorporation of sodium alginate pellets containing nematophagous fungi in the bovine diet is a method for the control of nematodiosis. The aims of this study were to evaluate the viability of Arthrobotrys cladodes and Pochonia chlamydosporia contained in sodium alginate pellets after passage through the bovine gastrointestinal tract, as well as to evaluate the effects of single and combined use of these fungi against bovine parasitic nematodes. The reduction in parasitic nematode infective larvae of bovines by the combined use of Arthrobotrys cladodes and Pochonia chlamydosporia was more than the reduction in infective larvae by Arthrobotrys cladodes or Pochonia chlamydosporia alone in the collections 12, 24 and 36 h after giving the pellets to the animals. Arthrobotrys cladodes and Pochonia chlamydosporia combined promoted maximum reduction of infective larvae of 86.3%. Therefore, the combination of Arthrobotrys cladodes and Pochonia chlamydosporia may be an effective method to control gastrointestinal nematodiosis affecting grazing cattle.
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Reduction of bovine strongilides in naturally contaminated pastures in the southeast region of Brazil
Experimental Parasitology, 2018Co-Authors: Oliveira, Isabela De Castro, Juliana Milani Araujo, Braga, Fabio Ribeiro, Lorendane Millena De ,carvalho, Vieira, Ítalo Stoupa, Campos, Artur Kanadani, Freitas, Samuel Galvão, Jackson Victor De AraujoAbstract:Biological control through the use of nematophagous fungi is a sustainable alternative for combatting helminthes in domestic animals and allows a reduction in the use of anthelmintics. The objective of this research was to evaluate the efficacy of the Arthrobotrys cladodes var macroides fungus in a pelleted formulation, based on sodium alginate and administered twice a week orally, as an alternative for the biological control of nematodes in field-grown young cattle. The experiment was conducted in a farm located in the municipality of Viçosa, MG, where 12 cattle, seven to nine months old, were allocated in two groups (treated group and control group) and distributed in pickets of Brachiaria decumbens, naturally infested with nematode larvae. The animals in the treated group received 1g of sodium alginate matrix pellets for every 10 kg of animal live weight, containing the nematophagous fungus Arthrobotrys cladodes var macroides and administered twice a week in conjunction with commercial feed. In the control group, each animal received 1 g of pellets for every 10 kg of animal live weight, without fungal mycelium added to the feed. Samples of feces and pastures were collected fortnightly for 12 months. The results showed that the most prevalent nematode genera in the coprocultures were Haemonchus sp., Cooperia sp. and Oesophagostomum sp., reflecting the results found in forage. The pasture that contained the animals that received feed with the fungus presented a reduction of 59% and 52% of larvae recovered at distances of 20 cm and 40 cm from the fecal pats, respectively. The mean number of eggs per gram of feces each month and animal body weight did not differ (p > 0.05) between the treated and control groups. Stool and soil samples from both groups were colonized by A. cladodes fungus and other fungi. Administration of Arthrobotrys cladodes var macroides mycelium by means of a sodium alginate matrix twice weekly reduced larval infestation of the surrounding pasture, indicating that this fungus may be a promising biological control of infecting forms of nematodes present in the environment
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Predation rate of nematophagous fungi after passing through the gastrointestinal tract of goats
Small Ruminant Research, 2017Co-Authors: Wendeo Ferreira Da ,silveira, Giselle Dias De ,oliveira, Braga, Fabio Ribeiro, Lorendane Milena De ,carvalho, Domingues, Rafael Reis, Laice Alves Da ,silva, Zanuncio, José Cola, Jackson Victor De AraujoAbstract:Nematophagous fungi are natural enemies of gastrointestinal helminth parasites. Fungi Arthrobotrys robusta (I31), Arthrobotrys conoides (I40), Duddingtonia flagrans (AC001), and Monacrosporium thaumasium (NF34) were combined: AC001 + I31 and NF34 + I40 and tested for the biological control of parasitic gastrointestinal nematode of goats in two trials. In trial A, the objective was to evaluate the predation capacity of the AC001 + I31 and NF34 + I40 fungi combinations in vitro. In trial B, the viability of the nematophagous fungi combination (conidia and chlamydospores/kg live weight) was evaluated after passage through the gastrointestinal tract of goats. In trial A, the combination of the AC001 + I31 and I40 + NF34 isolates reduced the number of L3 larvae of gastrointestinal nematodes (p
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controle in vitro de larvas infectantes de ciatostomineos nematoda cyathostominae de equinos utilizando os fungos predadores duddingtonia flagrans monacrosporium thaumasium e Arthrobotrys robusta
Ciência Animal Brasileira, 2009Co-Authors: Fabio Ribeiro Braga, Jackson Victor De Araujo, Rogerio Oliva Carvalho, Juliana Milani Araujo, Andre R Silva, Artur Kanadani CamposAbstract:The predatory capacity of three isolates of the nematodes predacious fungi Duddingtonia flagrans (AC001), Monacrosporium thaumasium and Arthrobotrys robusta on infective larvae of cyathostomes was evaluated in laboratorial conditions in medium water-agar 2% (WA 2%). The isolates AC001, NF34 and I31 had presented significant reduction (p KEY WORDS: Arthrobotrys robusta, Cyathostominae, equine, Duddingtonia flagrans, Monacrosporium thaumasium, Nematophagous fungi.
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IN VITRO CONTROL OF INFECTIVE CYATHOSTOMES LARVAE (NEMATODE: CYATHOSTOMINAE) FROM EQUINES USING PREDACIOUS FUNGUS Duddingtonia flagrans, Monacrosporium thaumasium e Arthrobotrys robusta CONTROLE IN VITRO DE LARVAS INFECTANTES DE CIATOSTOMÍNEOS (NEMAT
Universidade Federal de Goiás, 2009Co-Authors: Andre R Silva, Jackson Victor De Araujo, Fabio Ribeiro Braga, Rogerio Oliva Carvalho, Juliana Milani Araujo, Artur Kanadani CamposAbstract:The predatory capacity of three isolates of the nematodes predacious fungi Duddingtonia flagrans (AC001), Monacrosporium thaumasium and Arthrobotrys robusta on infective larvae of cyathostomes was evaluated in laboratorial conditions in medium water-agar 2% (WA 2%). The isolates AC001, NF34 and I31 had presented significant reduction (p<0.01) de 97.5%, 72.5% e 85% respectively in the average of infective larvae of ciathostomes recovered of the medium WA2% in the end of five days. The results of this assay evidence that these isolates could be used in the biological control of ciathostomes of equines.<br /><br />KEY WORDS: Arthrobotrys robusta, Cyathostominae, equine, Duddingtonia flagrans, Monacrosporium thaumasium, Nematophagous fungi.<br /> <p class="MsoNormal" style="margin: 0cm 0cm 0pt; line-height: 150%; text-align: justify; tab-stops: 243.0pt">A capacidade predatória de três isolados de fungos predadores de nematoides Duddingtonia flagrans (AC001), Monacrosporium thaumasium (NF34) e Arthrobotrys robusta (I31) sobre larvas infectantes de ciatostomíneos foi avaliada em condições laboratoriais em ensaio experimental em meio ágar-água 2% (AA 2%). Os isolados AC001, NF34 e I31 apresentaram redução significativa (p<0,01) de 97,5%, 72,5% e 85%, respectivamente, na média de larvas infectantes de ciatostomíneos recuperadas do meio AA2% ao final de sete dias. Os resultados deste ensaio evidenciam que esses isolados poderão ser utilizados no controle biológico de ciatostomíneos de equinos.<br /> <br />PALAVRAS-CHAVES: Arthrobotrys robusta, ciatostomíneos, equinos, Duddingtonia flagrans, fungos nematófagos, Monacrosporium thaumasium.</p>
Xue-mei Niu - One of the best experts on this subject based on the ideXlab platform.
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Novel Polyketide-Terpenoid Hybrid Metabolites and Increased Fungal Nematocidal Ability by Disruption of Genes 277 and 279 in Nematode-Trapping Fungus Arthrobotrys oligospora.
Journal of agricultural and food chemistry, 2020Co-Authors: Yong-hong Chen, Ke-qin Zhang, Xiao Liu, Rong Dai, Xue-mei NiuAbstract:Nematode-trapping fungus Arthrobotrys oligospora can produce a type of sesquiterpenyl epoxy-cyclohexenoid (SEC) metabolites that are regarded as characteristic chemtaxonomic markers. Here we report...
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Morphology Regulatory Metabolites from Arthrobotrys oligospora
Journal of natural products, 2012Co-Authors: Hui-xiang Zhang, Ke-qin Zhang, Ying Zhang, Lu-xia Wei, Jian-lin Tan, Yan-li Wang, Chuan-ping Zhang, Chun-yan Zhu, Xue-mei NiuAbstract:Novel autoregulatory metabolites, arthrosporols A–C (1–3), involved in regulating the morphological switch in fungi, were purified and characterized from the carnivorous fungus Arthrobotrys oligospora. These compounds possess a novel hybrid carbon skeleton consisting of an epoxy-cyclohexenol combined with a rare monocyclic sesquiterpenol substructure. This is the first report of a monocyclic sesquiterpenol of this type of fungal origin. Compounds 1–3 displayed significant inhibitory activities toward the formation of conidiophores, while compounds 1 and 3 showed the opposite effects on the formation of a two-dimensional network with increasing rates of 40–90% and inhibiting rates of 30–90%, respectively.
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Arthrobotrisins A-C, oligosporons from the nematode-trapping fungus Arthrobotrys oligospora.
Journal of natural products, 2011Co-Authors: Lu-xia Wei, Ying Zhang, Xue-mei Niu, Hui-xiang Zhang, Jian-lin Tan, Yan-sheng Chu, Hua-xi Xue, Yan-li Wang, Ke-qin ZhangAbstract:Arthrobotrys oligospora is a carnivorous fungus that can use mycelia trapping devices to capture their prey. Three novel oligosporons, named arthrobotrisins A–C (1–3), were isolated from A. oligospora and identified by spectroscopic analysis in combination with X-ray diffraction. This is the first time that the relative configuration of naturally occurring oligosporon metabolites has been fully determined. Compound 3 exhibited specific antibacterial activities.
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Arthrobotrys oligospora: a model organism for understanding the interaction between fungi and nematodes
Mycology, 2011Co-Authors: Xue-mei Niu, Ke-qin ZhangAbstract:Arthrobotrys oligospora, a predacious fungus of nematodes, has been very useful in understanding the relationship between nematophagous fungi and their nematode hosts. Arthrobotrys oligospora is by far the most common nematode-trapping fungus with the characteristic ability of forming adhesive trapping nets once in contact with nematodes. This review highlights the versatility and development of A. oligospora as a system to identify and characterize the ecology and biology of nematode-trapping fungi. Using A. oligospora, advances in our knowledge of nematophagous fungi have been made through the discovery of special traits and virulence determinants involved in the pathogenic process, or by creating new ways of presenting these factors to the target nematodes. We argue for an increased role for A. oligospora in complementing other model systems in biological control research.
