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Wang H, Liu Z, Duan F, Chen Y, Qiu K, Xiong Q, Lin H, Zhang J, Tan H. Isolation, identification, and antibacterial evaluation of endophytic fungi from Gannan navel orange. Front Microbiol 2023; 14:1172629. [PMID: 37396354 PMCID: PMC10307966 DOI: 10.3389/fmicb.2023.1172629] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 05/23/2023] [Indexed: 07/04/2023] Open
Abstract
Gannan navel orange is a famous brand in China but the isolation of its endophytic fungi was rarely reported. In this study, a total of 54 strains of endophytic fungi were successfully isolated from the pulp, peel, twig, and leaf of Gannan navel orange; they were successfully identified to belong to 17 species of 12 genera. All these strains were fermented using potato-dextrose agar (PDA) medium, and their secondary metabolites were then extracted with ethyl acetate (EtOAc). The antibacterial assays of Escherichia coli (E. coli), methicillin-resistant Staphylococcus aureus (MRSA), and Xanthomonas citri subsp. citri (Xcc) were also performed for the EtOAc extracts of these strains. As a result, the extracts of both Geotrichum sp. (gc-1-127-30) and Diaporthe biconispora (gc-1-128-79) demonstrated significant antibacterial activities against Xcc, and the MIC value for the extract of Colletotrichum gloeosporioides against MRSA was low to 62.5 μg/mL. Moreover, the chemical components of the extracts of Colletotrichum sp., Diaporthe biconispora, and Annulohypoxylon atroroseum were primarily investigated, and they successfully led to the isolation of 24 compounds involving a new botryane sesquiterpene. Among the isolated products, compound 2 showed significant inhibitory activities toward SA, MRSA, E. coli, and Xcc with MIC values of 12.5, 3.1, 125, and 12.5 μg/mL, respectively. This study revealed that the endophytic fungi of Gannan navel orange showed high potency to produce secondary metabolites with significant antibacterial effects.
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Affiliation(s)
- Huan Wang
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Ziyue Liu
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Fangfang Duan
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Yan Chen
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
- Xiangya School of Pharmaceutical Sciences, Central South University, Changsha, China
| | - Kaidi Qiu
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
| | - Qin Xiong
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
| | - Huiting Lin
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
| | - Jun Zhang
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
| | - Haibo Tan
- National Navel Orange Engineering Research Center, Gannan Normal University, Ganzhou, China
- Key Laboratory of South China Agricultural Plant Molecular Analysis and Genetic Improvement, Guangdong Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China
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Zabaleta G, Lee ST, Cook D, Aguilar M, Iannone LJ, Robles C, Martinez A. Indole-diterpenes alkaloid profiles of native grasses involved in tremorgenic syndromes in the Argentine Patagonia. Toxicon 2022; 217:107-111. [PMID: 35981666 DOI: 10.1016/j.toxicon.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 07/31/2022] [Accepted: 08/01/2022] [Indexed: 10/15/2022]
Abstract
One of the main intoxications to livestock in the Patagonia region of Argentina is the tremorgenic disease "Mal de Huecú", attributed to the consumption of the native grasses Poa huecu and/or Festuca argentina. In this report, five outbreaks of spontaneous intoxications were investigated. Several indole-diterpene alkaloids were identified in Poa huecu and Festuca argentina including the known tremorgen terpendole C and are likely the cause of "Mal de Huecú" disease.
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Affiliation(s)
- Gabriela Zabaleta
- Grupo Salud Animal, INTA Bariloche, San Carlos de Bariloche, Argentina.
| | - Stephen T Lee
- Poisonous Plant Research Laboratory, USDA Logan, UT, USA
| | - Daniel Cook
- Poisonous Plant Research Laboratory, USDA Logan, UT, USA
| | - Marcelo Aguilar
- INTA Agencia de Extensión Rural P(to) San Julián, Santa Cruz, Argentina
| | - Leopoldo J Iannone
- Instituto de Micología y Botánica-CONICET, Argentina; Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, DBBE, Laboratorio de Micología, Buenos Aires, Argentina
| | - Carlos Robles
- Grupo Salud Animal, INTA Bariloche, San Carlos de Bariloche, Argentina
| | - Agustin Martinez
- Grupo Salud Animal, INTA Bariloche, San Carlos de Bariloche, Argentina
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Tian P, Xu W, Li C, Song H, Wang M, Schardl CL, Nan Z. Phylogenetic relationship and taxonomy of a hybrid Epichloë species symbiotic with Festuca sinensis. Mycol Prog 2020. [DOI: 10.1007/s11557-020-01618-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Martinez A, Cook D, Lee ST, Sola D, Bain L, Borrelli L, Acín C, Gardner DR, Robles CA. Fatal stagger poisoning by consumption of Festuca argentina (Speg.) Parodi in goats from Argentine Patagonia. Toxicon 2020; 186:191-197. [PMID: 32783893 DOI: 10.1016/j.toxicon.2020.08.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/31/2020] [Accepted: 08/05/2020] [Indexed: 11/30/2022]
Abstract
The present study describes the spontaneous and experimental poisoning of goats by Festuca argentina in Argentine Patagonia. In April 2017, eight seven-month-old Creole male goats were accidentally introduced into a paddock that contained F. argentina. After four days, two of the goats were found dead and four out of the six remaining goats were clinically affected. Two of the latter had to be later euthanized in extremis. The main clinical signs were progressive nervous signs, starting with moderate muscle tremors, wide-based stance and ataxia. Postmortem examination was performed on the two euthanized goats. Epidermal fragments of F. argentina were found in the rumen samples from the necropsied goats and the fecal samples from the four affected goats. For the experimental poisoning, fresh sheaths of F. argentina collected from the paddock were offered to two goats at 10 g/kg body weight for 3 days. After 24-36 h, both animals exhibited severe muscle tremors, reluctance to move, tetanic convulsions, and opisthotonus. In both the spontaneously and experimentally poisoned goats, gross lesions were similar and consisted of dehydration, petechial hemorrhages in the epicardium and congestion. The main microscopic findings consisted of degeneration and loss of Purkinje cells and torpedoes in the granular layer of the cerebellum. The F. argentina sheaths collected from the pasture were found to contain tremorgenic indole-diterpene alkaloids. Taken together, the results of the present study suggest that the tremorgenic syndrome observed in the spontaneously poisoned goats was due to poisoning by F. argentina.
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Affiliation(s)
- Agustin Martinez
- Grupo Salud Animal, Instituto Nacional de Tecnología Agropecuaria (INTA), Modesta Victoria 4450, 8400, Bariloche, Río Negro, Argentina.
| | - Daniel Cook
- Poisonous Plant Research Laboratory, USDA ARS, United States
| | - Stephen T Lee
- Poisonous Plant Research Laboratory, USDA ARS, United States
| | - Diego Sola
- Centro de Encefalopatías y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, Spain
| | - Luciana Bain
- Residencia estudiantil, Universidad Nacional del Centro de la Provincia de Buenos Aires, Buenos Aires, Argentina
| | - Laura Borrelli
- Laboratorio de Microhistología, INTA, Bariloche, Río Negro, Argentina
| | - Cristina Acín
- Centro de Encefalopatías y Enfermedades Transmisibles Emergentes, Universidad de Zaragoza, Spain
| | - Dale R Gardner
- Poisonous Plant Research Laboratory, USDA ARS, United States
| | - Carlos A Robles
- Grupo Salud Animal, Instituto Nacional de Tecnología Agropecuaria (INTA), Modesta Victoria 4450, 8400, Bariloche, Río Negro, Argentina
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