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Makhloufi H, Pinon A, Champavier Y, Saliba J, Millot M, Fruitier-Arnaudin I, Liagre B, Chemin G, Mambu L. In Vitro Antiproliferative Activity of Echinulin Derivatives from Endolichenic Fungus Aspergillus sp. against Colorectal Cancer. Molecules 2024; 29:4117. [PMID: 39274965 PMCID: PMC11397142 DOI: 10.3390/molecules29174117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2024] [Revised: 08/20/2024] [Accepted: 08/25/2024] [Indexed: 09/16/2024] Open
Abstract
The endolichenic fungus Aspergillus sp. was isolated from the lichen Xanthoparmelia conspersa harvested in France. Aspergillus sp. was grown on a solid culture medium to ensure the large-scale production of the fungus with a sufficient mass of secondary metabolites. The molecular network analysis of extracts and subfractions enabled the annotation of 22 molecules, guiding the purification process. The EtOAc extract displayed an antiproliferative activity of 3.2 ± 0.4 µg/mL at 48 h against human colorectal cancer cells (HT-29) and no toxicity at 30 µg/mL against human triple-negative breast cancer (TNBC) cells (MDA-MB-231) and human embryonic kidney (HEK293) non-cancerous cells. Among the five prenylated compounds isolated, of which four are echinulin derivatives, compounds 1 and 2 showed the most important activity, with IC50 values of 1.73 µM and 8.8 µM, respectively, against HT-29 cells.
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Affiliation(s)
- Hind Makhloufi
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
| | - Aline Pinon
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
| | - Yves Champavier
- Univ. Limoges, CNRS, Inserm, CHU Limoges, BISCEm, UAR 2015, US 42, F-87025 Limoges, France
| | - Jennifer Saliba
- Laboratoire LIENSs, Université de La Rochelle, UMR CNRS 7266, F-17000 La Rochelle, France
| | - Marion Millot
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
| | | | - Bertrand Liagre
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
| | - Guillaume Chemin
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
| | - Lengo Mambu
- LABCiS, UR 22722, Faculté de Pharmacie, Univ. Limoges, F-87000 Limoges, France
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2
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Chakarwarti J, Anand V, Nayaka S, Srivastava S. In vitro Antibacterial Activity and Secondary Metabolite Profiling of Endolichenic Fungi Isolated from Genus Parmotrema. Curr Microbiol 2024; 81:195. [PMID: 38809483 DOI: 10.1007/s00284-024-03719-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2023] [Accepted: 04/26/2024] [Indexed: 05/30/2024]
Abstract
The endolichenic fungi are an unexplored group of organisms for the production of bioactive secondary metabolites. The aim of the present study is to determine the antibacterial potential of endolichenic fungi isolated from genus Parmotrema. The study is continuation of our previous work, wherein a total of 73 endolichenic fungi were isolated from the lichenized fungi, which resulted in 47 species under 23 genera. All the isolated endolichenic fungi were screened for preliminary antibacterial activity. Five endolichenic fungi-Daldinia eschscholtzii, Nemania diffusa, Preussia sp., Trichoderma sp. and Xylaria feejeensis, were selected for further antibacterial activity by disc diffusion method. The zone of inhibition ranged from 14.3 ± 0.1 to 23.2 ± 0.1. The chemical composition of the selected endolichenic fungi was analysed through GC-MS, which yielded a total of 108 compounds from all the selected five endolichenic fungi. Diethyl phthalate, 1-hexadecanol, dibutyl phthalate, n-tetracosanol-1, 1-nonadecene, pyrrol[1,2-a] pyrazine-1,4-dione, hexahydro-3-(2-methyl) and tetratetracontane were found to be common compounds among one or the other endolichenic fungi, which possibly were responsible for antibacterial activity. GC-MS data were further analysed through Principal Component Analysis which showed D. eschscholtzii to be with unique pattern of expression of metabolites. Compound confirmation test revealed coumaric acid to be responsible for antibacterial activity in D. eschscholtzii. So, the study proves that endolichenic fungi that inhabit lichenized fungal thalli could be a source of potential antibacterial compounds.
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Affiliation(s)
- Jyotsna Chakarwarti
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Lichenology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
| | - Vandana Anand
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Department of Botany, IFTM University, Moradabad, 244102, India
| | - Sanjeeva Nayaka
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India.
- Lichenology Laboratory, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India.
| | - Suchi Srivastava
- Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India
- Plant Ecology and Environmental Technologies Division, CSIR-National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226001, India
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Zhang W, Ran Q, Li H, Lou H. Endolichenic Fungi: A Promising Medicinal Microbial Resource to Discover Bioactive Natural Molecules-An Update. J Fungi (Basel) 2024; 10:99. [PMID: 38392771 PMCID: PMC10889713 DOI: 10.3390/jof10020099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2023] [Revised: 01/22/2024] [Accepted: 01/23/2024] [Indexed: 02/24/2024] Open
Abstract
Lichens are some of the most unique fungi and are naturally encountered as symbiotic biological organisms that usually consist of fungal partners (mycobionts) and photosynthetic organisms (green algae and cyanobacteria). Due to their distinctive growth environments, including hot deserts, rocky coasts, Arctic tundra, toxic slag piles, etc., they produce a variety of biologically meaningful and structurally novel secondary metabolites to resist external environmental stresses. The endofungi that live in and coevolve with lichens can also generate abundant secondary metabolites with novel structures, diverse skeletons, and intriguing bioactivities due to their mutualistic symbiosis with hosts, and they have been considered as strategically significant medicinal microresources for the discovery of pharmaceutical lead compounds in the medicinal industry. They are also of great importance in the fundamental research field of natural product chemistry. In this work, we conducted a comprehensive review and systematic evaluation of the secondary metabolites of endolichenic fungi regarding their origin, distribution, structural characteristics, and biological activity, as well as recent advances in their medicinal applications, by summarizing research achievements since 2015. Moreover, the current research status and future research trends regarding their chemical components are discussed and predicted. A systematic review covering the fundamental chemical research advances and pharmaceutical potential of the secondary metabolites from endolichenic fungi is urgently required to facilitate our better understanding, and this review could also serve as a critical reference to provide valuable insights for the future research and promotion of natural products from endolichenic fungi.
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Affiliation(s)
- Wenge Zhang
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Qian Ran
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Hehe Li
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
| | - Hongxiang Lou
- Department of Natural Products Chemistry, Key Lab of Chemical Biology (MOE), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, China
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Mackenzie TA, Reyes F, Martínez M, González-Menéndez V, Sánchez I, Genilloud O, Tormo JR, Ramos MC. Naphthoquinone Derivatives from Angustimassarina populi CF-097565 Display Anti-Tumour Activity in 3D Cultures of Breast Cancer Cells. Molecules 2024; 29:425. [PMID: 38257340 PMCID: PMC10820301 DOI: 10.3390/molecules29020425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2023] [Revised: 01/12/2024] [Accepted: 01/13/2024] [Indexed: 01/24/2024] Open
Abstract
Cancer is one of the leading causes of death worldwide, with breast cancer being the second cause of cancer-related mortality among women. Natural Products (NPs) are one of the main sources for drug discovery. During a screening campaign focused on the identification of extracts from Fundación MEDINA's library inhibiting the proliferation of cancer cell lines, a significant bioactivity was observed in extracts from cultures of the fungus Angustimassarina populi CF-097565. Bioassay-guided fractionation of this extract led to the identification and isolation of herbarin (1), 1-hydroxydehydroherbarin (4) plus other three naphthoquinone derivatives of which 3 and 5 are new natural products and 2 is herein described from a natural source for the first time. Four of these compounds (1, 3, 4 and 5) confirmed a specific cytotoxic effect against the human breast cancer cell line MCF-7. To evaluate the therapeutic potential of the compounds isolated, their efficacy was validated in 3D cultures, a cancer model of higher functionality. Additionally, an in-depth study was carried out to test the effect of the compounds in terms of cell mortality, sphere disaggregation, shrinkage, and morphology. The cell profile of the compounds was also compared to that of known cytotoxic compounds with the aim to distinguish the drug mode of action (MoA). The profiles of 1, 3 and 4 showed more biosimilarity between them, different to 5, and even more different to other known cytotoxic agents, suggesting an alternative MoA responsible for their cytotoxicity in 3D cultures.
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Affiliation(s)
| | | | | | | | | | | | - José R. Tormo
- Fundación MEDINA, Av. Conocimiento 34, Health Sciences Technology Park, 18016 Granada, Spain; (T.A.M.); (F.R.); (M.M.); (V.G.-M.); (I.S.); (O.G.)
| | - María C. Ramos
- Fundación MEDINA, Av. Conocimiento 34, Health Sciences Technology Park, 18016 Granada, Spain; (T.A.M.); (F.R.); (M.M.); (V.G.-M.); (I.S.); (O.G.)
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Gan PT, Lim YY, Ting ASY. Influence of light regulation on growth and enzyme production in rare endolichenic fungi. Folia Microbiol (Praha) 2023; 68:741-755. [PMID: 37022636 DOI: 10.1007/s12223-023-01050-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 03/28/2023] [Indexed: 04/07/2023]
Abstract
The influence of light regulation on the growth and enzyme production of three endolichenic fungal isolates, i.e. Pseudopestalotiopsis theae (EF13), Fusarium solani (EF5), and Xylaria venustula (PH22), was determined. The isolates were exposed to blue, red, green, yellow, white fluorescent light (12 h light-12 h dark photoperiod) (test), and 24 h dark (control) conditions. Results revealed that the alternating light-dark conditions resulted in the formation of dark rings in most fungal isolates but was absent in PH22. Red light induced sporulation while yellow light elicited higher biomass in all isolates (0.19 ± 0.01 g, 0.07 ± 0.00 g, and 0.11 ± 0.00 g, for EF13, PH22, and EF5, respectively) as compared to incubation in the dark. Results also showed that blue light induced higher amylase activity in PH22 (15.31 ± 0.45 U/mL) and L-asparaginase activity in all isolates (0.45 ± 0.01 U/mL, 0.55 ± 0.39 U/mL, and 0.38 ± 0.01 U/mL, for EF13, PH22, and EF5, respectively) compared to both control conditions. Green light enhanced the production of xylanase (6.57 ± 0.42 U/mL, 10.64 ± 0.12 U/mL, and 7.55 ± 0.56 U/mL for EF13, PH22, and EF5, respectively) and cellulase (6.49 ± 0.48 U/mL, 9.57 ± 0.25 U/mL, and 7.28 ± 0.63 U/mL, for EF13, PH22, and EF5, respectively). In contrast, red light was the least effective light treatment as production of enzymes was the least, with lower levels of amylase, cellulase, xylanase, and L-asparaginase detected. To conclude, all three endolichenic fungi are light-responsive, with fungal growth regulated with the use of red light and yellow light, and manipulation of enzyme production via blue and green light.
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Affiliation(s)
- Peck Ting Gan
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Selangor Darul Ehsan, 47500, Bandar Sunway, Malaysia
| | - Yau Yan Lim
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Selangor Darul Ehsan, 47500, Bandar Sunway, Malaysia
| | - Adeline Su Yien Ting
- School of Science, Monash University Malaysia, Jalan Lagoon Selatan, Selangor Darul Ehsan, 47500, Bandar Sunway, Malaysia.
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6
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Isolation and Identification of Secondary Metabolites Produced by Phytopathogenic Fungus Corynespora cassiicola from Hevea brasiliensis. Molecules 2022; 27:molecules27217360. [DOI: 10.3390/molecules27217360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2022] [Revised: 10/25/2022] [Accepted: 10/25/2022] [Indexed: 11/16/2022] Open
Abstract
The secondary metabolites of the phytopathogenic fungus Corynespora cassiicola CC01 from Hevea brasiliensis were investigated. As a result, two new compounds, 5-acetyl-7-hydroxy-6- methoxybenzofuran-2(3H)-one (1) and (S)-2-(2,3-dihydrofuro [3,2-c]pyridin-2-yl)propan-2-ol (2), together with seven known compounds, 4,6,8-trihydroxy-3,4-dihydronaphthalen-1(2H)-one (3), 3,6,8-trihydroxy-3,4-dihydronaphthalen-1(2H)-one (4), curvulin acid (5), 2-methyl-5-carboxymethyl- 7-hydroxychromone (6), tyrosol (7), p-hydroxybenzoic acid (8) and cerevisterol (9), were isolated from the fermentation extract by comprehensive silica gel, reverse phase silica gel, Sephadex-LH20 column chromatography and high-performance liquid chromatography (HPLC). The structures of these compounds were identified by using high-resolution electrospray mass spectrometry (HRESIMS), nuclear magnetic resonance spectroscopy (NMR), optical rotation, ultraviolet and infrared spectroscopy techniques and a comparison of NMR data with those reported in the literature. Compounds 1 and 2 were new compounds, and compounds 3–9 were discovered from this phytopathogenic fungus for the first time. Compounds 1–9 were tested for phytotoxicity against the fresh tender leaf of Hevea brasiliensis, and the results show that none of them were phytotoxic. Additionally, these compounds were subjected to an antimicrobial assay against three bacteria (E. coli, methicillin-resistant Staphylococcus aureus and Micrococcus luteus), but they showed no activity.
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Perera TWNK, Weerasinghe R, Attanayake RN, Paranagama PA. Biodeterioration of low density polyethylene by mangrove associated endolichenic fungi and their enzymatic regimes. Lett Appl Microbiol 2022; 75:1526-1537. [PMID: 36000184 DOI: 10.1111/lam.13819] [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: 12/07/2021] [Revised: 06/02/2022] [Accepted: 08/20/2022] [Indexed: 11/26/2022]
Abstract
Fungal involvement in biodeterioration of Low Density Polyethylene (LDPE) has received a great attention in recent years. Among diverse groups of fungi, Endolichenic Fungi (ELF) are adapted to thrive in resource limited conditions. Present study was designed to investigate the potential of mangrove associated ELF, in biodeterioration of LDPE and to quantify key-depolymerizing enzymes. A total of 31 ELF species, isolated from 22 lichens of mangrove ecosystems in Negombo lagoon, Sri Lanka were identified using DNA barcoding techniques. ELF were inoculated into mineral salt medium, containing LDPE strips and incubated at 28±2°C, for 21 days, under laboratory conditions. After incubation, biodeterioration was monitored based on percent reductions in weights and tensile properties, increments in degree of water absorption, changes in peaks of Infrared spectra and surface erosions using Scanning Electron Microscopy. Out of 31 species, Chaetomium globosum, Daldinia eschscholtzii, Neofusicoccum occulatum, Phanerochaete chrysosporium, Schizophyllum commune and Xylaria feejeensis showed significant changes. Production of depolymerizing enzymes by these species, were assayed qualitatively using plate-based methods and quantitatively by mass level enzyme production. Among them Phanerochaete chrysosporium showed the highest enzyme activities as (9.69±0.04)x10-3 , (1.96±0.01)x10-3 , (5.73±0.03)x10-3 , (0.88±0.01), (0.64±0.06), (1.43±0.01) U ml-1 for laccase, lignin peroxidase, manganese peroxidase, amylase, lipase and esterase, respectively.
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Affiliation(s)
- T W N K Perera
- Departmment of Microbiology, Faculty of Science, University of Kelaniya, Sri Lanka
| | - R Weerasinghe
- Departmment of Chemistry, Faculty of Science, University of Kelaniya, Sri Lanka
| | - R N Attanayake
- Department of Plant & Molecular Biology, Faculty of Science, University of Kelaniya, Sri Lanka
| | - P A Paranagama
- Departmment of Chemistry, Faculty of Science, University of Kelaniya, Sri Lanka
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Zhao L, Kim JC, Hur JS. 7-Hydroxy-2-octenoic acid-ethyl ester mixture as an UV protectant secondary metabolite of an endolichenic fungus isolated from Menegazzia terebrata. Arch Microbiol 2022; 204:395. [PMID: 35705862 DOI: 10.1007/s00203-022-02997-5] [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: 07/28/2021] [Revised: 05/03/2022] [Accepted: 05/16/2022] [Indexed: 11/02/2022]
Abstract
Enodolichenic fungi (ELF) are considered a promising bio-resource since they produce a variety of novel secondary metabolites with bioactivities. Ultraviolet (UV) radiation in sunlight containing UVA and UVB can cause acute and chronic skin diseases, and the demand for UV protectants in sunscreens has been increasing. Such situations evoke the strong interest of researchers in seeking effective UV protectants from natural products. In this study, we obtained partially purified 7-hydroxy-2-octenoic acid-ethyl ester (7E) from the secondary metabolites of ELF000548, which has UVA absorption activity. The antioxidant properties were performed by in vitro tests. The superoxide anion scavenging activity and inhibition of linoleic acid peroxidation of the 7E mixture were higher than ascorbic acid (ASA) and butyl hydroxyl anisole (BHA). Furthermore, the compound recovered the damage caused by UVB irradiation and inhibited melanin synthesis. Additionally, the 7E mixture exhibited no cytotoxicity toward the mouse melanoma cell lines, B16F1 and B16F10, except for the normal cell line, HaCaT. In general, these results are the first report about bioactivities of 7E, and those demonstrated that this compound might be a UV protectant to go further study.
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Affiliation(s)
- Lu Zhao
- Central Laboratory, Weifang People's Hospital/The First Affiliated Hospital of Weifang Medical Unviersity, Weifang, 261000, People's Republic of China.,Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, 250012, People's Republic of China.,Shandong Laibo Biotechnology Co., Ltd., Jinan, 250101, People's Republic of China
| | - Jin-Cheol Kim
- Department of Agricultural Chemistry, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, 500-757, Korea
| | - Jae-Seoun Hur
- Korean Lichen Research Institute, Sunchon National University, Suncheon, 57922, Korea.
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9
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Luo M, Chang S, Li Y, Xi X, Chen M, He N, Wang M, Zhao W, Xie Y. Molecular Networking-Based Screening Led to the Discovery of a Cyclic Heptadepsipeptide from an Endolichenic Xylaria sp. JOURNAL OF NATURAL PRODUCTS 2022; 85:972-979. [PMID: 35385664 DOI: 10.1021/acs.jnatprod.1c01108] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
MS/MS-based molecular networking strain prioritization led to the discovery of a group of cyclic depsipeptides from an endolichenic Xylaria sp. The main component, xylaroamide A (1), was obtained by LC-MS-guided isolation. The planar structure of compound 1 was elucidated via 1D and 2D NMR, as well as MS/MS data. The configurations were fully determined by the combination of advanced Marfey's analysis, partial hydrolysis, Mosher's reaction, and GIAO NMR calculation based on a restricted conformational search. A plausible biosynthetic pathway for xylaroamide A (1) involving a rare trans-acting N-methyltransferase is proposed based on bioinformatics analysis. Xylaroamide A (1) exhibited inhibitory activity against cancer cell lines BT-549 and RKO with IC50 values of 2.5 and 9.5 μM, respectively.
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Bioprospecting of an Endolichenic Fungus Phanerochaete sordida Isolated from Mangrove-Associated Lichen Bactrospora myriadea. J CHEM-NY 2022. [DOI: 10.1155/2022/3193689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Bioassay-guided fractionation of the ethyl acetate extract of Phanerochaete sordida, an endolichenic fungus (ELF) isolated from the host lichen Bactrospora myriadea, collected from Negombo lagoon, Sri Lanka, led to the isolation of a bioactive compound. Following the identification of the fungus using morphological and DNA barcoding techniques, the pure compound was isolated using column chromatography, preparative TLC, and semipreparative HPLC. The structure elucidation was carried out using IR, HR-ESI-MS and 1H, 13C & 2D NMR spectroscopic methods. The in vitro bioassays conducted revealed that compound 1 has a high antioxidant activity with ABTS•+ (IC50
), moderate anti-inflammatory activity (IC50
), comparable antibacterial activity against the oral-bacterial strain Streptococcus mutans (MIC 898.79 μM and MLC 1797.58 μM), moderate tyrosinase inhibition (IC50
), and moderate cytotoxicity against oral cancer (IC50
), in comparison with respective positive controls. The in silico experiments conducted for tyrosinase inhibition and cytotoxicity using Schrödinger revealed results in line with the in vitro results, thus confirming the bioactivities. The molecule also satisfies the key features of drug likeliness according to pharmacokinetic studies.
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Xu ZL, Yan DJ, Tan XM, Niu SB, Yu M, Sun BD, Ding CF, Zhang YG, Ding G. Phaeosphspirone (1/1'), a pair of unique polyketide enantiomers with an unusual 6/5/5/6 tetracyclic ring from the desert plant endophytic fungus Phaeosphaeriaceae sp. PHYTOCHEMISTRY 2022; 194:112969. [PMID: 34861538 DOI: 10.1016/j.phytochem.2021.112969] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2021] [Revised: 09/23/2021] [Accepted: 09/23/2021] [Indexed: 06/13/2023]
Abstract
Phaeosphspirone, an undescribed polyketide with a unique 6/5/5/6-fused tetracyclic system, and two known analogues, herbarin and O-methylherbarin, were purified from the endophytic fungus Phaeosphaeriaceae sp. isolated from the desert plant Bassia dasyphylla. The connectivity and relative configuration of phaeosphspirone was elucidated by comprehensive HR-ESI-MS and NMR analysis together with a computer-assisted structure elucidation (CASE) method. A pair of enantiomers existing in phaeosphspirone were separated by HPLC chromatography after reacting with chiral reagents, from which the absolute configuration of phaeosphspirone was simultaneously determined based on Mosher's rule. This tandem strategy provides a useful approach for the separation and stereochemical determination of enantiomers possessing secondary hydroxyl groups. The structural feature of phaeosphspirone, herbarin and O-methylherbarin together with gene cluster analysis suggested their polyketide biosynthetic origin. Herbarin and O-methylherbarin exhibited moderate cytotoxicity against three cancer cell lines.
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Affiliation(s)
- Zhen-Lu Xu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100193, People's Republic of China; Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong, Jinan, 250103, People's Republic of China; College of Life Sciences, Shandong Normal University, Shandong, Jinan, 250014, People's Republic of China
| | - Dao-Jiang Yan
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, People's Republic of China
| | - Xiang-Mei Tan
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100193, People's Republic of China
| | - Shu-Bin Niu
- School of Biological Medicine, Beijing City University, Beijing, 450046, People's Republic of China
| | - Meng Yu
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100193, People's Republic of China
| | - Bing-Da Sun
- Institute of Microbiology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
| | - Cai-Feng Ding
- State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201, People's Republic of China
| | - Yong-Gang Zhang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Shandong, Jinan, 250103, People's Republic of China; College of Life Sciences, Shandong Normal University, Shandong, Jinan, 250014, People's Republic of China.
| | - Gang Ding
- Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicines, Ministry of Education, Institute of Medicinal Plant Development, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, 100193, People's Republic of China.
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Qu W, Kithsiri Wijeratne EM, Bashyal BP, Xu J, Xu YM, Liu MX, Inácio MC, Arnold AE, U'Ren JM, Leslie Gunatilaka AA. Strobiloscyphones A-F, 6-Isopentylsphaeropsidones and Other Metabolites from Strobiloscypha sp. AZ0266, a Leaf-Associated Fungus of Douglas Fir. JOURNAL OF NATURAL PRODUCTS 2021; 84:2575-2586. [PMID: 34495663 DOI: 10.1021/acs.jnatprod.1c00662] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Six new 6-isopentylsphaeropsidones, strobiloscyphones A-F (1-6), and a new hexadecanoic acid, (2Z,4E,6E)-8,9-dihydroxy-10-oxohexadeca-2,4,6-trienoic acid (7), together with sphaeropsidone (8) and its known synthetic analogue 5-dehydrosphaeropsidone (9) were isolated from Strobiloscypha sp. AZ0266, a fungus inhabiting the leaf litter of Douglas fir (Pseudotsuga menziesii). The structures of 1-7 were established on the basis of their high-resolution mass and 1D and 2D NMR spectroscopic data, and their relative and/or absolute configurations were determined by NOE, comparison of experimental and calculated ECD spectra, and application of the modified Mosher's ester method. Of these, strobiloscyphone F (6) contains a novel highly oxygenated tetracyclic oxireno-octahydrodibenzofuran ring system. Natural products 1, 6, and 9 and the semisynthetic analogue 12 derived from 8 exhibited cytotoxic activity, whereas 9 and 12 showed antimicrobial activity. Possible biosynthetic pathways to 1-6, 8, and 9 are proposed.
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Affiliation(s)
- Wei Qu
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, People's Republic of China
| | - E M Kithsiri Wijeratne
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Bharat P Bashyal
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Jian Xu
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, 639 Longmian Avenue, Nanjing 211198, People's Republic of China
| | - Ya-Ming Xu
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Manping X Liu
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - Marielle C Inácio
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
| | - A Elizabeth Arnold
- School of Plant Sciences, College of Agriculture and Life Sciences, University of Arizona, Tucson, Arizona 85721, United States
| | - Jana M U'Ren
- Biosystems Engineering, College of Agriculture and Life Sciences, University of Arizona, Tucson, Arizona 85721, United States
| | - A A Leslie Gunatilaka
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, United States
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Lin LB, Gao YQ, Han R, Xiao J, Wang YM, Zhang Q, Zhai YJ, Han WB, Li WL, Gao JM. Alkylated Salicylaldehydes and Prenylated Indole Alkaloids from the Endolichenic Fungus Aspergillus chevalieri and Their Bioactivities. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:6524-6534. [PMID: 34096711 DOI: 10.1021/acs.jafc.1c01148] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Sixteen metabolites, including seven C7-alkylated salicylaldehyde derivatives (1-7) and nine prenylated indole alkaloids (8-16), three of which are new, namely, asperglaucins A and B (1 and 2) and neoechinulin F (8), were separated from the endolichenic fungus Aspergillus chevalieri SQ-8. Asperglaucin A (1) represents an unusual phthalide-like derivative with a benzo[c]thiophen-1(3H)-one scaffold. All compounds were assessed in vitro for antibacterial, antineuroinflammatory, and antioxidant activities. Notably, asperglaucins A and B exhibited potent antibacterial activities against two plant pathogens Pseudomonas syringae pv actinidae (Psa) and Bacillus cereus, with an MIC value of 6.25 μM; further SEM analyses illustrated that the possible bacteriostatic mechanisms for compounds 1 and 2 were to alter the external structure of B. cereus and Psa, and to cause the rupture or deformation of the cell membranes, respectively, and the results suggest that compounds 1 and 2 may serve as potential promising candidates for lead compounds of agrochemical bactericides. Furthermore, compounds 6 and 10 significantly inhibited nitric oxide production with an IC50 value of ca. 12 μM, and the possible anti-inflammatory mechanisms involved were also studied by molecular docking. Finally, the tested phenolics 3-5 showed significant antioxidative effects. Thus, strain SQ-8 represents a novel resource of these bioactive metabolites to be utilized.
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Affiliation(s)
- Li-Bin Lin
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Yu-Qi Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Rui Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Jian Xiao
- Shaanxi Key Laboratory of Phytochemistry, College of Chemistry and Chemical Engineering, Baoji University of Arts and Sciences, Baoji 721013, P. R. China
| | - Yi-Meng Wang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Qiang Zhang
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Yi-Jie Zhai
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Wen-Bo Han
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
| | - Wen-Li Li
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266003, P. R. China
| | - Jin-Ming Gao
- Shaanxi Key Laboratory of Natural Products & Chemical Biology, College of Chemistry and Pharmacy, Northwest A&F University, Yangling 712100, P. R. China
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Biological potential of bioactive metabolites derived from fungal endophytes associated with medicinal plants. Mycol Prog 2021. [DOI: 10.1007/s11557-021-01695-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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15
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Zhou YF, Hu K, Wang F, Tang JW, Zhang L, Sun HD, Cai XH, Puno PT. 3-Hydroxy-4-methyldecanoic Acid-Containing Cyclotetradepsipeptides from an Endolichenic Beauveria sp. JOURNAL OF NATURAL PRODUCTS 2021; 84:1244-1253. [PMID: 33754723 DOI: 10.1021/acs.jnatprod.0c01305] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
An investigation of an endolichenic Beauveria sp. led to the discovery of seven new cyclotetradepsipeptides, beauveamides A-G (2-8), along with the known beauverolide Ka (1). All incorporate a 3-hydroxy-4-methyldecanoic acid (HMDA) moiety in their structures. Their configuration was determined through Marfey's, J-based configuration analysis, and NMR computational methods, representing the first time that the stereostructures of HMDA-moiety-containing cyclotetradepsipeptides have been established. Compounds 1 and 2 exhibited protecting effects on HEI-OC1 cells at 10 μM, while 1, 4, and 5 could stimulate glucose uptake in cultured rat L6 myoblasts at 50 μM. Compound 1 showed dose-dependent activity in both L6 myoblasts and myotubes.
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Affiliation(s)
- Yuan-Fei Zhou
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Kun Hu
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Fang Wang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Jian-Wei Tang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Liang Zhang
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Han-Dong Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Xiang-Hai Cai
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
| | - Pema-Tenzin Puno
- State Key Laboratory of Phytochemistry and Plant Resources in West China, and Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming, 650201 Yunnan, People's Republic of China
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Xu D, Xue M, Shen Z, Jia X, Hou X, Lai D, Zhou L. Phytotoxic Secondary Metabolites from Fungi. Toxins (Basel) 2021; 13:261. [PMID: 33917534 PMCID: PMC8067579 DOI: 10.3390/toxins13040261] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/02/2021] [Accepted: 04/03/2021] [Indexed: 02/06/2023] Open
Abstract
Fungal phytotoxic secondary metabolites are poisonous substances to plants produced by fungi through naturally occurring biochemical reactions. These metabolites exhibit a high level of diversity in their properties, such as structures, phytotoxic activities, and modes of toxicity. They are mainly isolated from phytopathogenic fungal species in the genera of Alternaria, Botrytis, Colletotrichum, Fusarium, Helminthosporium, and Phoma. Phytotoxins are either host specific or non-host specific phytotoxins. Up to now, at least 545 fungal phytotoxic secondary metabolites, including 207 polyketides, 46 phenols and phenolic acids, 135 terpenoids, 146 nitrogen-containing metabolites, and 11 others, have been reported. Among them, aromatic polyketides and sesquiterpenoids are the main phytotoxic compounds. This review summarizes their chemical structures, sources, and phytotoxic activities. We also discuss their phytotoxic mechanisms and structure-activity relationships to lay the foundation for the future development and application of these promising metabolites as herbicides.
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Affiliation(s)
| | | | | | | | | | | | - Ligang Zhou
- Department of Plant Pathology, College of Plant Protection, China Agricultural University, Beijing 100193, China; (D.X.); (M.X.); (Z.S.); (X.J.); (X.H.); (D.L.)
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Biodiscovery of Potential Antibacterial Diagnostic Metabolites from the Endolichenic Fungus Xylaria venustula Using LC-MS-Based Metabolomics. BIOLOGY 2021; 10:biology10030191. [PMID: 33806264 PMCID: PMC8000601 DOI: 10.3390/biology10030191] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/08/2021] [Accepted: 02/16/2021] [Indexed: 01/27/2023]
Abstract
Simple Summary In this study, we determined the bioactivities and chemical natures of three species of lichen Usnea and their associated endolichenic fungi (ELF) through metabolomics. We found significant differences in the antibacterial activities and the metabolites produced by the host lichen and its ELF, with the latter targeting a wider scope of organisms. We also discovered potential key metabolites produced by ELF that are yet to be reported. This study shows the application of metabolomics in rapidly identifying bioactive metabolites that are of significance in the discovery of new drugs. Abstract Three species of the lichen Usnea (U. baileyi (Stirt.) Zahlbr., U. bismolliuscula Zahlbr. and U. pectinata Stirt.) and nine associated endolichenic fungi (ELF) were evaluated using a metabolomics approach. All investigated lichen crude extracts afforded antibacterial activity against Staphylococcus aureus (minimum inhibitory concentration (MIC): 0.0625 mg/mL), but none was observed against Escherichia coli, while the ELF extract Xylaria venustula was found to be the most active against S. aureus (MIC: 2.5 mg/mL) and E. coli (MIC: 5 mg/mL). X. venustula was fractionated and tested for to determine its antibacterial activity. Fractions XvFr1 to 5 displayed bioactivities against both test bacteria. Selected crude extracts and fractions were subjected to metabolomics analyses using high-resolution LC–MS. Multivariate analyses showed the presence of five secondary metabolites unique to bioactive fractions XvFr1 to 3, which were identified as responsible for the antibacterial activity of X. venustula. The p-values of these metabolites were at the margin of significance level, with methyl xylariate C (P_60) being the most significant. However, their high variable importance of projection (VIP) scores (>5) suggest these metabolites are potential diagnostic metabolites for X. venustula for “dual” bioactivity against S. aureus and E. coli. The statistical models also showed the distinctiveness of metabolites produced by lichens and ELF, thus supporting our hypotheses of ELF functionality similar to plant endophytes.
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Kumar S, Singh R, Kamal. Global diversity and distribution of distoseptosporic micromycete <em>Corynespora</em> Güssow (Corynesporascaceae): An updated checklist with current status. STUDIES IN FUNGI 2021. [DOI: 10.48130/sif/6/1/1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
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Rajulu MBG, Thirunavukkarasu N, Kumar SS, Kaur T, Reddy MS, Suryanarayanan TS. Endolichenic fungal diversity associated with some lichens of the Western Ghats. PLANTA MEDICA 2020; 86:960-966. [PMID: 31766071 DOI: 10.1055/a-1045-1989] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A total of 389 strains of fungi belonging to 38 species were isolated from 10 lichen species of the Western Ghats, southern India. All the lichens screened, irrespective of their growth forms or location, harboured endolichenic fungi. Most of the fungi belonged to the Ascomycotina. Chaetomium sp. 1, Hypoxylon investiens, Nemania bipapillata, Nodulisporium sp., Paecilomyces sp., and Sporormiella intermedia were the most common ones and were present in 5 or more lichen species. Of the 28 sporulating fungi, 7 belonged to Xylariales, and their total colonization frequency in all the lichens was also high. This observation further substantiates the high ecological amplitude of Xylariales, possibly due to overlapping ecological niches and their ability to inhibit co-occurring endolichenic fungi.
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Affiliation(s)
| | | | - Subramanya Shravan Kumar
- Divecha Centre for Climate Change & Centre for Ecological Sciences, Indian Institute of Science, Bangalore, India
| | - Tanveer Kaur
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, Punjab, India
| | - Mondem Sudhakara Reddy
- Department of Biotechnology, Thapar Institute of Engineering & Technology, Patiala, Punjab, India
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Santhirasegaram S, Wickramarachchi SR, Attanayake RN, Weerakoon G, Samarakoon S, Wijeratne K, Paranagama PA. A Novel Cytotoxic Compound From the Endolichenic Fungus, Xylaria psidii Inhabiting the Lichen, Amandinea medusulina. Nat Prod Commun 2020. [DOI: 10.1177/1934578x20933017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
The lichen host, Amandinea medusulina, collected from mangrove habitats in Sri Lanka, and its associated endolichenic fungi were isolated and identified by rDNA-ITS sequence analysis and morphological features. One of the fungal strains frequently isolated from the lichen thalli was identified as Xylaria psidii. This study aimed at the isolation and identification of the cytotoxic compounds present in this fungus. Secondary metabolites of X. psidii were first extracted into ethyl acetate and subsequently subjected to bioassay-guided fractionation to isolate the bioactive compounds. Sulforhodamine B assay against a lung cancer (NCI-H292) cell line was used to determine the differential cytotoxic activity. Bioassay-guided fractionation led to the isolation of an active compound, SS/02/29/08, showing moderate cytotoxicity (IC50 = 27.2 µg/mL). Its structure was elucidated by IR, 1D- and 2D-NMR, and 13C-NMR spectrophotometry and MS, in combination with HRMS, 13C NMR, HSQC, HMBC, and DQF-COSY. The structure of SS/02/29/08 was determined as ( Z)-3-{(3-acetyl-2-hydroxyphenyl)diazenyl}-2,4-dihydroxybenzaldehyde and identified as a new compound. This novel compound has promising differential cytotoxic activity against human lung cancer cell line (NCI-H292).
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Affiliation(s)
| | | | | | - Gothamie Weerakoon
- Algae, Fungi and Plants Division, Department of Life Sciences, The Natural History Museum, London, UK
| | - Sameera Samarakoon
- Institute of Biochemistry Molecular Biology and Biotechnology, University of Colombo, Sri Lanka
| | - Kithsiri Wijeratne
- School of Natural Resources and Environment, University of Arizona, Tucson, USA
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Xie F, Luan XY, Gao Y, Xu K, Lou HX. Cytotoxic Heptaketides from the Endolichenic Fungus Ulospora bilgramii. JOURNAL OF NATURAL PRODUCTS 2020; 83:1623-1633. [PMID: 32394716 DOI: 10.1021/acs.jnatprod.0c00108] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Eleven new metabolites including nine heptaketides, ulosporin A-G (1a-7b), one diphenyl compound, ulophenol (8), and one spirobisnaphthalene, palmarumycin P5 (9), were isolated from the endolichenic fungus Ulospora bilgramii, which inhabits the lichen Umbilicaria sp. The structures of these compounds were elucidated based on comprehensive analysis of their spectroscopic, electronic circular dichroism (ECD), and single-crystal X-ray diffraction data. Ulosporin G (7) inhibited the growth of the human cancer cell lines A549, MCF-7, and KB with IC50 values of 1.3, 1.3, and 3.0 μM, respectively. Additionally, it induced A549 cell apoptosis through G0/G1 cell cycle arrest caused by DNA damage.
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Affiliation(s)
- Fei Xie
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
- Department of Pharmacy, Qilu Hospital of Shandong University, Jinan250012, People's Republic of China
| | - Xiao-Yi Luan
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Yun Gao
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Ke Xu
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Shandong University, No. 44 West Wenhua Road, Jinan 250012, People's Republic of China
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Luan XY, Xie F, Xu K, Gao Y, Lu JH, Lou HX. (±)-Ulodione A, a pair of unprecedented cyclopentanones from Ulospora bilgramii. Tetrahedron Lett 2020. [DOI: 10.1016/j.tetlet.2020.151732] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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23
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Gupta S, Chaturvedi P, Kulkarni MG, Van Staden J. A critical review on exploiting the pharmaceutical potential of plant endophytic fungi. Biotechnol Adv 2020; 39:107462. [DOI: 10.1016/j.biotechadv.2019.107462] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 09/22/2019] [Accepted: 10/22/2019] [Indexed: 02/08/2023]
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Yang HX, Peng XP, Gao H, Zhang HM, Wang ZR, Li G, Lou HX. Pleosporalins H and I, two new heptaketides from the endophytic fungus Pleosporales sp. F46 by using OSMAC strategy. Nat Prod Res 2019; 35:3307-3313. [DOI: 10.1080/14786419.2019.1698573] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Hong-Xia Yang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Xiao-Ping Peng
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Han Gao
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Hui-Min Zhang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Zi-Ru Wang
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
| | - Hong-Xiang Lou
- Department of Natural Medicinal Chemistry and Pharmacognosy, School of Pharmacy, Qingdao University, Qingdao, People’s Republic of China
- Department of Natural Product Chemistry, Key Laboratory of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University, Jinan, People’s Republic of China
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Further sesquiterpenoids from the rhizomes of Homalomena occulta and their anti-inflammatory activity. Bioorg Med Chem Lett 2019; 29:1162-1167. [DOI: 10.1016/j.bmcl.2019.03.031] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/14/2019] [Accepted: 03/22/2019] [Indexed: 12/13/2022]
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Chen M, Wang R, Zhao W, Yu L, Zhang C, Chang S, Li Y, Zhang T, Xing J, Gan M, Feng F, Si S. Isocoumarindole A, a Chlorinated Isocoumarin and Indole Alkaloid Hybrid Metabolite from an Endolichenic Fungus Aspergillus sp. Org Lett 2019; 21:1530-1533. [PMID: 30785290 DOI: 10.1021/acs.orglett.9b00385] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Isocoumarindole A (1), a novel polyketide synthetase-nonribosomal peptide synthetase (PKS-NRPS) hybrid metabolite, was isolated from the endolichenic fungus Aspergillus sp. CPCC 400810. The structure of isocoumarindole A (1) was featured by an unprecedented skeleton containing chlorinated isocoumarin and indole diketopiperazine alkaloid moieties linked by a carbon-carbon bond, which was determined by a combination of spectroscopic analyses, Marfey's method, and calculations of NMR chemical shifts, ECD spectra, and optical rotation values. Isocoumarindole A showed significant cytotoxicity and mild antifungal activities.
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Affiliation(s)
- Minghua Chen
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China.,Key Laboratory for Uighur Medicine , Institute of Materia Medica of Xinjiang Uygur Autonomous Region , Urumqi 830004 , People's Republic of China
| | - Renzhong Wang
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China.,Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Wuli Zhao
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Liyan Yu
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Conghui Zhang
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Shanshan Chang
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Yan Li
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Tao Zhang
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Jianguo Xing
- Key Laboratory for Uighur Medicine , Institute of Materia Medica of Xinjiang Uygur Autonomous Region , Urumqi 830004 , People's Republic of China
| | - Maoluo Gan
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
| | - Feng Feng
- Department of Natural Medicinal Chemistry, School of Traditional Chinese Pharmacy , China Pharmaceutical University , Nanjing 210009 , People's Republic of China
| | - Shuyi Si
- NHC Key Laboratory for Microbial Drug Bioengeering, Institute of Medicinal Biotechnology , Chinese Academy of Medical Sciences and Peking Union Medical College , Beijing 100050 , People's Republic of China
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Lagarde A, Millot M, Pinon A, Liagre B, Girardot M, Imbert C, Ouk T, Jargeat P, Mambu L. Antiproliferative and antibiofilm potentials of endolichenic fungi associated with the lichen
Nephroma laevigatum. J Appl Microbiol 2019; 126:1044-1058. [DOI: 10.1111/jam.14188] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 11/21/2018] [Accepted: 12/26/2018] [Indexed: 12/17/2022]
Affiliation(s)
- A. Lagarde
- Département de Pharmacognosie Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
| | - M. Millot
- Département de Pharmacognosie Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
| | - A. Pinon
- Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
| | - B. Liagre
- Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
| | - M. Girardot
- UMR CNRS 7267, Laboratoire Écologie et biologie des interactions Université de Poitiers Poitiers France
| | - C. Imbert
- UMR CNRS 7267, Laboratoire Écologie et biologie des interactions Université de Poitiers Poitiers France
| | - T.S. Ouk
- Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
| | - P. Jargeat
- UMR 5174 UPS‐CNRS‐IRD, Laboratoire Évolution et Diversité Biologique Université de Toulouse 3 Toulouse France
| | - L. Mambu
- Département de Pharmacognosie Laboratoire PEIRENE – EA 7500 Université de Limoges Limoges France
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Padhi S, Masi M, Panda SK, Luyten W, Cimmino A, Tayung K, Evidente A. Antimicrobial secondary metabolites of an endolichenic Aspergillus niger isolated from lichen thallus of Parmotrema ravum. Nat Prod Res 2019; 34:2573-2580. [PMID: 30600725 DOI: 10.1080/14786419.2018.1544982] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A new 6-benzyl-γ-pyrone (1), named aspergyllone was isolated from the culture filtrates of an endolichenic fungus Aspergillus niger Tiegh, obtained from lichen thallus Parmotrema ravum (Krog & Swinscow) Serus, collected in India. 1 was isolated for the first time from an endolichenic fungus together with six other known metabolites identified as aurasperones A (2) and D (3), asperpyrone A (4), fonsecinone A (5), carbonarone A (6) and pyrophen (7). The compounds were tested against a panel of human, plant, food borne and fish pathogens. Aspergyllone showed strong selective antifungal activity against Candida parapsilosis (Ashford) Langeron & Talice, with an IC50 of 52 µg/mL. Aurasperone A and pyrophen showed moderate to strong antimicrobial activity inhibiting seven different test pathogens, being pyrophen active with IC50 ranging from 35 to 97 µg/mL.[Formula: see text].
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Affiliation(s)
- Srichandan Padhi
- Department of Botany, North Orissa University, Baripada, Odisha, India
| | - Marco Masi
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | | | | | - Alessio Cimmino
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
| | - Kumanand Tayung
- Department of Botany, Gauhati University, Guwahati, Assam, India
| | - Antonio Evidente
- Department of Chemical Sciences, University of Naples Federico II, Naples, Italy
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Fu P, Zhou T, Ren F, Zhu S, Zhang Y, Zhuang W, Che Y. Pseudonectrins A–D, heptaketides from an endophytic fungus Nectria pseudotrichia. RSC Adv 2019; 9:12146-12152. [PMID: 35517032 PMCID: PMC9063488 DOI: 10.1039/c9ra01787a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 04/08/2019] [Indexed: 11/21/2022] Open
Abstract
The new heptaketides, pseudonectrins A–D (1–4), were isolated from a plant endophyte Nectria pseudotrichia. Compounds 1–3 showed moderate cytotoxicity towards human tumor cells.
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Affiliation(s)
- Peinan Fu
- School of Medicine and Life Sciences
- Nanjing University of Chinese Medicine
- Nanjing 210023
- People's Republic of China
- State Key Laboratory of Toxicology & Medical Countermeasures
| | - Tingnan Zhou
- School of Medicine and Life Sciences
- Nanjing University of Chinese Medicine
- Nanjing 210023
- People's Republic of China
- State Key Laboratory of Toxicology & Medical Countermeasures
| | - Fengxia Ren
- State Key Laboratory of Toxicology & Medical Countermeasures
- Beijing Institute of Pharmacology & Toxicology
- Beijing 100850
- People's Republic of China
| | - Shuaiming Zhu
- State Key Laboratory of Toxicology & Medical Countermeasures
- Beijing Institute of Pharmacology & Toxicology
- Beijing 100850
- People's Republic of China
| | - Yang Zhang
- State Key Laboratory of Toxicology & Medical Countermeasures
- Beijing Institute of Pharmacology & Toxicology
- Beijing 100850
- People's Republic of China
| | - Wenying Zhuang
- State Key Laboratory of Mycology
- Institute of Microbiology
- Chinese Academy of Sciences
- Beijing 100101
- People's Republic of China
| | - Yongsheng Che
- State Key Laboratory of Toxicology & Medical Countermeasures
- Beijing Institute of Pharmacology & Toxicology
- Beijing 100850
- People's Republic of China
- Institute of Medicinal Biotechnology
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Chen D, Qiao J, Sun Z, Liu Y, Sun Z, Zhu N, Xu X, Yang J, Ma G. New naphtoquinones derivatives from the edible bulbs of Eleutherine americana and their protective effect on the injury of human umbilical vein endothelial cells. Fitoterapia 2019; 132:46-52. [DOI: 10.1016/j.fitote.2018.11.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 11/22/2018] [Accepted: 11/24/2018] [Indexed: 11/28/2022]
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Li YL, Zhu RX, Li G, Wang NN, Liu CY, Zhao ZT, Lou HX. Secondary metabolites from the endolichenic fungus Ophiosphaerella korrae. RSC Adv 2019; 9:4140-4149. [PMID: 35520149 PMCID: PMC9060614 DOI: 10.1039/c8ra10329a] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 01/12/2019] [Indexed: 12/28/2022] Open
Abstract
The isolation of the cytotoxic fractions from the endolichenic fungus Ophiosphaerella korrae yielded six new metabolites, including five polyketides (ophiofuranones A (1) and B (2), with unusual furopyran-3,4-dione-fused heterocyclic skeletons, ophiochromanone (3), ophiolactone (4), and ophioisocoumarin (5)), one sesquiterpenoid ophiokorrin (10), and nine known compounds. Their structures were established on the basis of the analysis of HRESIMS and NMR spectroscopic data. ECD calculations, GIAO NMR shift calculations and single-crystal X-ray diffraction were employed for the stereo-structure determination. A plausible biogenetic pathway for the ophiofuranones A (1) and B (2) was proposed. The cytotoxic assay suggested that the five known perylenequinones mainly contributed to the cytoxicity of the extract. Further phytotoxic studies indicated that ophiokorrin inhibited root elongation in the germination of Arabidopsis thaliana with an IC50 value of 18.06 μg mL−1. Six new metabolites were isolated from the endolichenic fungus Ophiosphaerella korrae. Ophiokorrin inhibited root elongation in the germination of Arabidopsis thaliana.![]()
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Affiliation(s)
- Yue-Lan Li
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Rong-Xiu Zhu
- School of Chemistry and Chemical Engineering
- Shandong University
- Jinan 250100
- People's Republic of China
| | - Gang Li
- Department of Natural Medicinal Chemistry and Pharmacognosy
- School of Pharmacy
- Qingdao University
- Qingdao 266021
- People's Republic of China
| | - Ning-Ning Wang
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Chun-Yu Liu
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
| | - Zun-Tian Zhao
- College of Life Sciences
- Shandong Normal University
- Jinan 250014
- People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry
- Key Lab of Chemical Biology (MOE)
- School of Pharmaceutical Sciences
- Shandong University
- Jinan 250012
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Padhi S, Masi M, Cimmino A, Tuzi A, Jena S, Tayung K, Evidente A. Funiculosone, a substituted dihydroxanthene-1,9-dione with two of its analogues produced by an endolichenic fungus Talaromyces funiculosus and their antimicrobial activity. PHYTOCHEMISTRY 2019; 157:175-183. [PMID: 30419411 DOI: 10.1016/j.phytochem.2018.10.031] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 10/25/2018] [Accepted: 10/27/2018] [Indexed: 05/17/2023]
Abstract
An undescribed substituted dihydroxanthene-1,9-dione, named funiculosone, was isolated together with its two analogues identified as mangrovamide J and ravenelin, from the culture filtrates of Talaromyces funiculosus (Thom) Samson, Yilmaz, Frisvad & Seifert (Trichocomaceae), an endolichenic fungus isolated from lichen thallus of Diorygma hieroglyphicum (Pers.) Staiger & Kalb (Graphidaceae), in India. Funiculosone was characterized, essentially by spectroscopic methods, as 4,8,9a-trihydroxy-3,4a-dimethyl-4a,9a-dihydro-4H-xanthene-1,9-dione. Its relative stereochemistry was deduced by single crystal X-ray analysis while the absolute configuration was assigned as 4S,4aS,9aS by ECD spectra in comparison to that of the closely related mangrovamide J. This latter, to which, not being an amide, an inappropriate common name was given, was only recently isolated, together with undescribed and known prenylatedindole alkaloids and chromone derivatives from an unidentified Penicillium sp. X-ray structural analysis of the isolated mangrovamide J, for which no biological activity was previously reported, revealed polymorphism and a new crystalline phase is described. All the compounds displayed antibacterial activity with an IC50 range 23-104 μg/mL when assayed against Escherichia coli Escherich and Staphylococcus aureus Ogston. Funiculosone also showed anticandidal activity against Candida albicans Berkhout with an IC50 35 μg/mL.
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Affiliation(s)
- Srichanadan Padhi
- Department of Botany, North Orissa University, Baripada, 757003, India
| | - Marco Masi
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy
| | - Alessio Cimmino
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy
| | - Angela Tuzi
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy
| | - Subhrakanta Jena
- Department of Zoology, North Orissa University, Baripada, 757003, India
| | | | - Antonio Evidente
- Department of Chemical Sciences, University of Naples Federico II, Via Cintia 4, 80126, Naples, Italy.
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Mafezoli J, Xu YM, Hilário F, Freidhof B, Espinosa-Artiles P, dos Santos LC, de Oliveira MCF, Gunatilaka AAL. Modulation of polyketide biosynthetic pathway of the endophytic fungus, Anteaglonium sp. FL0768, by copper (II) and anacardic acid. PHYTOCHEMISTRY LETTERS 2018; 28:157-163. [PMID: 31354886 PMCID: PMC6660184 DOI: 10.1016/j.phytol.2018.10.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
In an attempt to explore the biosynthetic potential of endosymbiotic fungi, the secondary metabolite profiles of the endophytic fungus, Anteaglonium sp. FL0768, cultured under a variety of conditions were investigated. In potato dextrose broth (PDB) medium, Anteaglonium sp. FL0768 produced the heptaketides, herbaridine A (1), herbarin (2), 1-hydroxydehydroherbarin (3), scorpinone (4), and the methylated hexaketide 9S,11R-(+)-ascosalitoxin (5). Incorporation of commonly used epigenetic modifiers, 5-azacytidine and suberoylanilide hydroxamic acid, into the PDB culture medium of this fungus had no effect on its secondary metabolite profile. However, the histone acetyl transferase inhibitor, anacardic acid, slightly affected the metabolite profile affording scorpinone (4) as the major metabolite together with 1-hydroxydehydroherbarin (3) and a different methylated hexaketide, ascochitine (6). Intriguingly, incorporaion of Cu2+ into the PDB medium enhanced production of metabolites and drastically affected the biosynthetic pathway resulting in the production of pentaketide dimers, palmarumycin CE4 (7), palmarumycin CP4 (8), and palmarumycin CP1 (9), in addition to ascochitine (6). The structure of the new metabolite 7 was established with the help of spectroscopic data and by MnO2 oxidation to the known pentaketide dimer, palmarumycin CP3 (10). Biosynthetic pathways to some metabolites in Anteaglonium sp. FL0768 are presented and possible effects of AA and Cu2+ on these pathways are discussed.
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Affiliation(s)
- Jair Mafezoli
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
- Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Campus do Pici, Caixa Postal 6044, Fortaleza-CE, 60455-970, Brazil
| | - Ya-ming Xu
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
| | - Felipe Hilário
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
- Departamento de Química Orgânica, Instituto de Química, UNESP, Universidade Estadual Paulista, Araraquara, Sao Paulo, 14800-900, Brazil
| | - Brandon Freidhof
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
| | - Patricia Espinosa-Artiles
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
| | - Lourdes C. dos Santos
- Departamento de Química Orgânica, Instituto de Química, UNESP, Universidade Estadual Paulista, Araraquara, Sao Paulo, 14800-900, Brazil
| | - Maria C. F. de Oliveira
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
- Departamento de Química Orgânica e Inorgânica, Universidade Federal do Ceará, Campus do Pici, Caixa Postal 6044, Fortaleza-CE, 60455-970, Brazil
| | - A. A. Leslie Gunatilaka
- Southwest Center for Natural Products Research, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706, USA
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35
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Maduranga K, Attanayake RN, Santhirasegaram S, Weerakoon G, Paranagama PA. Molecular phylogeny and bioprospecting of Endolichenic Fungi (ELF) inhabiting in the lichens collected from a mangrove ecosystem in Sri Lanka. PLoS One 2018; 13:e0200711. [PMID: 30157176 PMCID: PMC6114277 DOI: 10.1371/journal.pone.0200711] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 07/02/2018] [Indexed: 11/18/2022] Open
Abstract
Endolichenic fungi (ELF) are unexplored group of organisms as a source for the production of bioactive secondary metabolites with radical scavenging activity, antilipase and amylase inhibitory activities. Endolichenic fungi in lichens collected from mangrove or mangrove associated plants are least known for their fungal diversity and potential to produce bioactive compounds. A total of 171 ELF strains were isolated from the lichens collected from mangrove and mangrove associated plants in Puttalam lagoon. Out of this collection, 70 isolates were identified using rDNA-ITS region sequence homology to the GenBank accessions and a phylogenetic analysis was performed. Commonly isolated genera of ELF from lichens were Aspergillus, Byssochlamys, Talaromyces, Diaporthe, Phomopsis, Endomelanconiopsis, Schizophyllum, Cerrena, Trichoderma, Xylaria, Hypoxylon, Daldinia, Preussia, Sordaria, Neurospora, and Lasiodiplodia. In the present study, the effectiveness of ethyl acetate extracts of the ELF isolates were investigated against antioxidant activity, antilipase activity and α-amylase inhibition activity in in-vitro conditions. The results revealed that the extracts of Daldinia eschscholtzii, Diaporthe musigena and Sordaria sp. had the highest radical scavenging activity with smaller IC50 values (25 μg/mL to 31 μg/mL) compared to the IC50 values of BHT (76.50±1.47 μg/mL). Antilipase assay revealed that 13 extracts from ELF showed promising antiobesity activity ranged between 25% to 40%. Amylase inhibitory assay indicated that the test extracts do not contain antidiabetic secondary metabolites.
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Affiliation(s)
- Kasun Maduranga
- Department of Chemistry, University of Kelaniya, Kelaniya, Sri Lanka
| | | | | | - Gothamie Weerakoon
- Integrative Research Centre, Department of Science & Education, Field Museum of Natural History, Chicago, United States of America
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Yu NH, Park SY, Kim JA, Park CH, Jeong MH, Oh SO, Hong SG, Talavera M, Divakar PK, Hur JS. Endophytic and endolichenic fungal diversity in maritime Antarctica based on cultured material and their evolutionary position among Dikarya. Fungal Syst Evol 2018; 2:263-272. [PMID: 32467890 PMCID: PMC7225575 DOI: 10.3114/fuse.2018.02.07] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Fungal endophytes comprise one of the most ubiquitous groups of plant symbionts. They live asymptomatically within vascular plants, bryophytes and also in close association with algal photobionts inside lichen thalli. While endophytic diversity in land plants has been well studied, their diversity in lichens and bryophytes are poorly understood. Here, we compare the endolichenic and endophytic fungal communities isolated from lichens and bryophytes in the Barton Peninsula, King George Island, Antarctica. A total of 93 fungal isolates were collected from lichens and bryophytes. In order to determine their identities and evolutionary relationships, DNA sequences of the nuclear internal transcribed spacer (ITS), nuclear ribosomal small subunit (nuSSU), nuclear large subunit (nuLSU), and mitochondrial SSU (mtSSU) rDNA were obtained and protein coding markers of the two largest subunit of RNA polymerase II (RPB1 and RPB2) were generated. Multilocus phylogenetic analyses revealed that most of the fungal isolates were distributed in the following six classes in the phylum Ascomycota: Dothideomycetes, Eurotiomycetes, Lecanoromycetes, Leotiomycetes, Pezizomycetes and Sordariomycetes. For the first time we report the presence of subphylum Mortierellomycotina that may belong to an undescribed order in endophytic fungi. Taken together, our results imply that lichens and bryophytes provide similar niches and harbour a selection of these fungi, indicating generalists within the framework of evolutionary adaptation.
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Affiliation(s)
- N H Yu
- Korean Lichen Research Institute, Sunchon National University, Suncheon, Korea.,Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Korea
| | - S-Y Park
- Department of Plant Medicine, College of Life Science and Natural Resources, Sunchon National University, Suncheon, Korea
| | - J A Kim
- National Institute of Biological Resources, Incheon, South Korea
| | - C-H Park
- Korean Lichen Research Institute, Sunchon National University, Suncheon, Korea
| | - M-H Jeong
- Korean Lichen Research Institute, Sunchon National University, Suncheon, Korea
| | - S-O Oh
- Division of Forest Biodiversity, Korea National Arboretum, Pocheon, Korea
| | - S G Hong
- Division of Polar Life Sciences, Korea Polar Research Institute, Incheon, Korea
| | - M Talavera
- Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, Sevilla, Spain
| | - P K Divakar
- Departamento de Biología Vegetal II, Facultad de Farmacia, Universidad Complutense de Madrid, Madrid, Spain
| | - J-S Hur
- Korean Lichen Research Institute, Sunchon National University, Suncheon, Korea
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Lagarde A, Jargeat P, Roy M, Girardot M, Imbert C, Millot M, Mambu L. Fungal communities associated with Evernia prunastri, Ramalina fastigiata and Pleurosticta acetabulum: Three epiphytic lichens potentially active against Candida biofilms. Microbiol Res 2018; 211:1-12. [PMID: 29705201 DOI: 10.1016/j.micres.2018.03.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 02/07/2018] [Accepted: 03/17/2018] [Indexed: 11/26/2022]
Abstract
Fungal communities associated to three epiphytic lichens active against Candida, were investigated using culture-based methods We hypothetized that associated fungi would contribute to lichens activities. The ability of specific fungi to grow inside or outside lichens was investigated. To detect biogenesis pathways involved in the production of secondary metabolites, genes coding for nonribosomal peptide synthetase (NRPS) and polyketide synthase I (PKS I) were screened by PCR from fungal DNA extracts. Both endo and epilichenic communities were isolated from two fructicose (Evernia prunastri and Ramalina fastigiata) and one foliose (Pleurosticta acetabulum) lichens. A total of 86 endolichenic and 114 epilichenic isolates were obtained, corresponding to 18 and 24 phylogenetic groups respectively suggesting a wide diversity of fungi. The communities and the species richness were distinct between the three lichens which hosted potentially new fungal species. Additionally, the endo- and epilichenic communities differed in their composition: Sordariomycetes were particularly abundant among endolichenic fungi and Dothideomycetes among epilichenic fungi. Only a few fungi colonized both habitats, such as S. fimicola, Cladosporium sp1 and Botrytis cinerea. Interestingly, Nemania serpens (with several genotypes) was the most abundant endolichenic fungus (53% of isolates) and was shared by the three lichens. Finally, 12 out of 36 phylogenetic groups revealed the presence of genes coding for nonribosomal peptide synthetase (NRPs) and polyketide synthase I (PKS I). This study shows that common lichens are reservoirs of diverse fungal communities, which could potentially contribute to global activity of the lichen and, therefore, deserve to be isolated for further chemical studies.
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Affiliation(s)
- Aurélie Lagarde
- EA 1069 Laboratoire de Chimie des Substances Naturelles, Faculté de Pharmacie, Université de Limoges, 2 rue du Dr Marcland, 87025 Limoges Cedex, France
| | - Patricia Jargeat
- UMR5174 UPS-CNRS-IRD Laboratoire Evolution et Diversité Biologique, EDB, Université Toulouse, 3, Bât 4R1, 118 route de Narbonne, 31062 Toulouse, France
| | - Mélanie Roy
- UMR5174 UPS-CNRS-IRD Laboratoire Evolution et Diversité Biologique, EDB, Université Toulouse, 3, Bât 4R1, 118 route de Narbonne, 31062 Toulouse, France
| | - Marion Girardot
- Laboratoire Ecologie et Biologie des Interactions, Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, F-86073 Poitiers, France
| | - Christine Imbert
- Laboratoire Ecologie et Biologie des Interactions, Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, F-86073 Poitiers, France
| | - Marion Millot
- EA 1069 Laboratoire de Chimie des Substances Naturelles, Faculté de Pharmacie, Université de Limoges, 2 rue du Dr Marcland, 87025 Limoges Cedex, France
| | - Lengo Mambu
- EA 1069 Laboratoire de Chimie des Substances Naturelles, Faculté de Pharmacie, Université de Limoges, 2 rue du Dr Marcland, 87025 Limoges Cedex, France.
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Anti-inflammatory phomalichenones from an endolichenic fungus Phoma sp. J Antibiot (Tokyo) 2018; 71:753-756. [DOI: 10.1038/s41429-018-0058-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 03/27/2018] [Accepted: 03/30/2018] [Indexed: 01/03/2023]
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Calcott MJ, Ackerley DF, Knight A, Keyzers RA, Owen JG. Secondary metabolism in the lichen symbiosis. Chem Soc Rev 2018; 47:1730-1760. [PMID: 29094129 DOI: 10.1039/c7cs00431a] [Citation(s) in RCA: 116] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Lichens, which are defined by a core symbiosis between a mycobiont (fungal partner) and a photobiont (photoautotrophic partner), are in fact complex assemblages of microorganisms that constitute a largely untapped source of bioactive secondary metabolites. Historically, compounds isolated from lichens have predominantly been those produced by the dominant fungal partner, and these continue to be of great interest for their unique chemistry and biotechnological potential. In recent years it has become apparent that many photobionts and lichen-associated bacteria also produce a range of potentially valuable molecules. There is evidence to suggest that the unique nature of the symbiosis has played a substantial role in shaping many aspects of lichen chemistry, for example driving bacteria to produce metabolites that do not bring them direct benefit but are useful to the lichen as a whole. This is most evident in studies of cyanobacterial photobionts, which produce compounds that differ from free living cyanobacteria and are unique to symbiotic organisms. The roles that these and other lichen-derived molecules may play in communication and maintaining the symbiosis are poorly understood at present. Nonetheless, advances in genomics, mass spectrometry and other analytical technologies are continuing to illuminate the wealth of biological and chemical diversity present within the lichen holobiome. Implementation of novel biodiscovery strategies such as metagenomic screening, coupled with synthetic biology approaches to reconstitute, re-engineer and heterologously express lichen-derived biosynthetic gene clusters in a cultivable host, offer a promising means for tapping into this hitherto inaccessible wealth of natural products.
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Affiliation(s)
- Mark J Calcott
- School of Biological Sciences, Victoria University of Wellington, New Zealand.
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Padumadasa C, Xu YM, Wijeratne EMK, Espinosa-Artiles P, U'Ren JM, Arnold AE, Gunatilaka AAL. Cytotoxic and Noncytotoxic Metabolites from Teratosphaeria sp. FL2137, a Fungus Associated with Pinus clausa. JOURNAL OF NATURAL PRODUCTS 2018; 81:616-624. [PMID: 29373790 DOI: 10.1021/acs.jnatprod.7b00838] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
A new naphthoquinone, teratosphaerone A (1), four new naphthalenones, namely, teratosphaerone B (2), structurally related to 1, iso-balticol B (3), iso-balticol B-4,9-acetonide (4), and (+)-balticol C (5), a new furanonaphthalenone, (3a S,9 R,9a S)-1(9a),3(3a),9-hexahydromonosporascone (6), and the known metabolite monosporascone (7) were isolated from Teratosphaeria sp. FL2137, a fungal strain inhabiting the internal tissue of recently dead but undecomposed foliage of Pinus clausa. The structures of 1-6 were elucidated on the basis of their spectroscopic data including 2D NMR, and absolute configurations of 2, 3, and 6 were determined by the modified Mosher's ester method. When evaluated in a panel of five tumor cell lines, metabolites 1 and 7 isolated from a cytotoxic fraction of the extract exhibited moderate selectivity for metastatic breast adenocarcinoma cell line MDA-MB-231. Of these, 1 showed cytotoxicity to this cell line with an IC50 of 1.2 ± 0.1 μM.
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Affiliation(s)
- Chayanika Padumadasa
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
- Department of Chemistry, Faculty of Applied Sciences , University of Sri Jayewardenepura , Gangodawila, Nugegoda , Sri Lanka
| | - Ya-Ming Xu
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - E M Kithsiri Wijeratne
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Patricia Espinosa-Artiles
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
| | - Jana M U'Ren
- Department of Agricultural and Biosystems Engineering, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A Elizabeth Arnold
- School of Plant Sciences, College of Agriculture and Life Sciences , University of Arizona , Tucson , Arizona 85721 , United States
| | - A A Leslie Gunatilaka
- Natural Products Center, School of Natural Resources and the Environment, College of Agriculture and Life Sciences , University of Arizona , 250 E. Valencia Road , Tucson , Arizona 85706 , United States
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41
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Kim TY, Jang JY, Yu NH, Chi WJ, Bae CH, Yeo JH, Park AR, Hur JS, Park HW, Park JY, Park JH, Lee SK, Kim JC. Nematicidal activity of grammicin produced by Xylaria grammica KCTC 13121BP against Meloidogyne incognita. PEST MANAGEMENT SCIENCE 2018; 74:384-391. [PMID: 28851010 DOI: 10.1002/ps.4717] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 08/25/2017] [Accepted: 08/25/2017] [Indexed: 05/28/2023]
Abstract
BACKGROUND The endolichenic fungus Xylaria grammica KCTC 13121BP showed strong nematicidal activity against Meloidogyne incognita. This study aimed to identify the nematicidal metabolites and to evaluate the efficacy of the strain as a biocontrol agent under pot and field conditions. RESULTS Bioassay-guided fractionation and instrumental analyses led to grammicin being identified as the nematicidal metabolite. Because patulin is a mycotoxic isomer of grammicin and is known to have strong antibacterial and cytotoxic activities, several biological activities of the two compounds were compared. Grammicin showed strong second-stage juvenile killing and egg-hatching inhibitory effects, with a 50% effective concentration at 72 h (EC50/72 h ) of 15.9 µg/mL and a 50% effective concentration at 14 days (EC50/14 days ) of 5.87 µg/mL, respectively, whereas patulin was virtually inactive in both respects. Patulin was strongly active toward various phytopathogenic bacteria in vitro, whereas grammicin was weakly so. Patulin at the concentration range of 0.1-10 µg/mL also showed dose-dependent cytotoxicity toward the human first-trimester trophoblast cell line SW.71, whereas grammicin was not toxic toward this cell line. In pot and field experiments, a wettable powder-type formulation and fermentation broth filtrate of X. grammica KCTC 13121BP effectively suppressed the development of root-knot nematode disease on tomato and melon plants. CONCLUSION The results suggest that X. grammica and grammicin may have potential applications for control of root-knot nematode disease of various crops. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Tae Yoon Kim
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Ja Yeong Jang
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Nan Hee Yu
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Won Jae Chi
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Chang-Hwan Bae
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Joo Hong Yeo
- Biological and Genetic Resources Assessment Division, National Institute of Biological Resources, Incheon, Republic of Korea
| | - Ae Ran Park
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
| | - Jae-Seon Hur
- Korean Lichen Research Institute, Suncheon National University, Suncheon, Republic of Korea
| | - Hae Woong Park
- R&D Division, World Institute of Kimchi, Gwangju, Republic of Korea
| | - Ji-Yeon Park
- Laboratory of Animal Medicine, College of Veterinary Medicine and BK21 PLUS Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Jong-Hwan Park
- Laboratory of Animal Medicine, College of Veterinary Medicine and BK21 PLUS Project Team, Chonnam National University, Gwangju, Republic of Korea
| | - Sung Ki Lee
- Department of Obstetrics and Gynecology, College of Medicine, Konyang University, Daejeon, Republic of Korea
| | - Jin-Cheol Kim
- Division of Applied Bioscience and Biotechnology, Institute of Environmentally Friendly Agriculture, College of Agriculture and Life Sciences, Chonnam National University, Gwangju, Republic of Korea
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Basak S, Mal D. Applications of [4+2] Anionic Annulation and Carbonyl-Ene Reaction in the Synthesis of Anthraquinones, Tetrahydroanthraquinones, and Pyranonaphthoquinones. J Org Chem 2017; 82:11035-11051. [DOI: 10.1021/acs.joc.7b01987] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shyam Basak
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
| | - Dipakranjan Mal
- Department of Chemistry, Indian Institute of Technology Kharagpur, Kharagpur 721302, India
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Suryanarayanan TS, Thirunavukkarasu N. Endolichenic fungi: the lesser known fungal associates of lichens. Mycology 2017; 8:189-196. [PMID: 30123639 PMCID: PMC6059131 DOI: 10.1080/21501203.2017.1352048] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2017] [Accepted: 07/03/2017] [Indexed: 12/26/2022] Open
Abstract
Lichens are the result of a stable mutualism between a fungal and a photosynthesising partner (alga or cyanobacterium). In addition to the fungal partner in this mutualism, lichens are associated with endolichenic fungi which reside inside their thalli. The endolichenic fungi appear to have evolved with the lichen and many of them are a source of novel metabolites vested with unique bioactivities. There is very little information on the biology of endolichenic fungi and their interactions with the other components of a lichen microbiome. There is an urgent need to understand these aspects of endolichenic fungi such that their ecology and economic potential are known more completely. The current knowledge on endolichenic fungi is reviewed here.
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Muggia L, Kopun T, Grube M. Effects of Growth Media on the Diversity of Culturable Fungi from Lichens. Molecules 2017; 22:E824. [PMID: 28513562 PMCID: PMC6154544 DOI: 10.3390/molecules22050824] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/10/2017] [Accepted: 05/11/2017] [Indexed: 11/16/2022] Open
Abstract
Microscopic and molecular studies suggest that lichen symbioses contain a plethora of associated fungi. These are potential producers of novel bioactive compounds, but strains isolated on standard media usually represent only a minor subset of these fungi. By using various in vitro growth conditions we are able to modulate and extend the fraction of culturable lichen-associated fungi. We observed that the presence of iron, glucose, magnesium and potassium in growth media is essential for the successful isolation of members from different taxonomic groups. According to sequence data, most isolates besides the lichen mycobionts belong to the classes Dothideomycetes and Eurotiomycetes. With our approach we can further explore the hidden fungal diversity in lichens to assist in the search of novel compounds.
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Affiliation(s)
- Lucia Muggia
- Department of Life Sciences, University of Trieste, via Giorgieri 10, 34127 Trieste, Italy.
| | - Theodora Kopun
- Institute of Plant Science, Karl-Franzens University of Graz, Holteigasse 6, 8010 Graz, Austria.
| | - Martin Grube
- Institute of Plant Science, Karl-Franzens University of Graz, Holteigasse 6, 8010 Graz, Austria.
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Zhou YH, Zhang M, Zhu RX, Zhang JZ, Xie F, Li XB, Chang WQ, Wang XN, Zhao ZT, Lou HX. Heptaketides from an Endolichenic Fungus Biatriospora sp. and Their Antifungal Activity. JOURNAL OF NATURAL PRODUCTS 2016; 79:2149-57. [PMID: 27556953 DOI: 10.1021/acs.jnatprod.5b00998] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Twelve new heptaketides, biatriosporins A-L (1-12), biatriosporin M (13) (a ramulosin derivative), and 19 known compounds (14-32) were isolated from the endolichenic fungus Biatriospora sp. (8331C). The structures of these compounds were determined by analyzing MS and NMR data. The absolute configurations of compounds 1, 2, 7, and 9 were determined by single-crystal X-ray diffraction analysis, whereas compound 10 was deduced with Mosher's method. Four of the compounds were active in an antifungal assay. The most potent compound, compound 4, also sensitized clinically derived azole-resistant Candida albicans strains to fluconazole (FLC). A mechanistic investigation revealed that 4 inhibited the function of efflux pumps and reduced the transcriptional expression of the efflux-pump-related genes CDR1 and CDR2.
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Affiliation(s)
- Yan-Hui Zhou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Ming Zhang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Rong-Xiu Zhu
- School of Chemistry and Chemical Engineering, Shandong University , 27 Shanda Nanlu, Jinan 250100, People's Republic of China
| | - Jiao-Zhen Zhang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Fei Xie
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Xiao-Bin Li
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Wen-Qiang Chang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Xiao-Ning Wang
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
| | - Zun-Tian Zhao
- College of Life Sciences, Shandong Normal University , 88 Wenhua East Road, Jinan 250014, People's Republic of China
| | - Hong-Xiang Lou
- Department of Natural Product Chemistry, Key Lab of Chemical Biology of Ministry of Education, School of Pharmaceutical Sciences, Shandong University , 44 Wenhua West Road, Jinan 250012, People's Republic of China
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He JW, Wang CX, Yang L, Chen GD, Hu D, Guo LD, Yao XS, Gao H. A Pair of New Polyketide Enantiomers from Three Endolichenic Fungal Strains Nigrospora sphaerica, Alternaria alternata, and Phialophora sp. Nat Prod Commun 2016. [DOI: 10.1177/1934578x1601100633] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
A pair of new enantiomeric polyketides, (-)- and (+)-nigrosporaol A (1a and 1b), along with one related known compound, (±)-alternarienoic acid (2), were isolated from three endolichenic fungal strains, Nigrospora sphaerica (No.83-1-1-2), Alternaria alternata (No.58-8-4-1), and Phialophora sp.(No.96-1-8-1). Their structures, including the absolute configurations, were elucidated on the basis of spectroscopic methods, X-ray diffraction analysis, and the modified Mosher's method.
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Affiliation(s)
- Jun-Wei He
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
- Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Chuan-Xi Wang
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Li Yang
- Jiangxi University of Traditional Chinese Medicine, Nanchang, 330004, China
| | - Guo-Dong Chen
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Dan Hu
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Liang-Dong Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100190, China
| | - Xin-Sheng Yao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
| | - Hao Gao
- Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China
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47
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Zhou YH, Li XB, Zhang JZ, Li L, Zhang M, Chang WQ, Wang XN, Lou HX. Three new drimane-type sesquiterpenoids, chaetothyrins A-C, from an endolichenic fungus Chaetothyriales sp. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2016; 18:409-14. [PMID: 27025769 DOI: 10.1080/10286020.2015.1135906] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Three new drimane-type sesquiterpenoids chaetothyrins A-C (1-3), were isolated from an endolichenic fungus Chaetothyriales sp. (4341B). Their structures were determined by analysis of MS and NMR data as well as single-crystal X-ray diffraction analysis.
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Affiliation(s)
- Yan-Hui Zhou
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Xiao-Bin Li
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Jiao-Zhen Zhang
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Lin Li
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Ming Zhang
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Wen-Qiang Chang
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Xiao-Ning Wang
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
| | - Hong-Xiang Lou
- a Key Lab of Chemical Biology of Ministry of Education, Department of Natural Products Chemistry , Shandong University , Jinan 250012 , China
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48
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U'Ren JM, Miadlikowska J, Zimmerman NB, Lutzoni F, Stajich JE, Arnold AE. Contributions of North American endophytes to the phylogeny, ecology, and taxonomy of Xylariaceae (Sordariomycetes, Ascomycota). Mol Phylogenet Evol 2016; 98:210-32. [PMID: 26903035 DOI: 10.1016/j.ympev.2016.02.010] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Revised: 02/10/2016] [Accepted: 02/13/2016] [Indexed: 11/28/2022]
Abstract
The Xylariaceae (Sordariomycetes) comprise one of the largest and most diverse families of Ascomycota, with at least 85 accepted genera and ca. 1343 accepted species. In addition to their frequent occurrence as saprotrophs, members of the family often are found as endophytes in living tissues of phylogenetically diverse plants and lichens. Many of these endophytes remain sterile in culture, precluding identification based on morphological characters. Previous studies indicate that endophytes are highly diverse and represent many xylariaceous genera; however, phylogenetic analyses at the family level generally have not included endophytes, such that their contributions to understanding phylogenetic relationships of Xylariaceae are not well known. Here we use a multi-locus, cumulative supermatrix approach to integrate 92 putative species of fungi isolated from plants and lichens into a phylogenetic framework for Xylariaceae. Our collection spans 1933 isolates from living and senescent tissues in five biomes across the continental United States, and here is analyzed in the context of previously published sequence data from described species and additional taxon sampling of type specimens from culture collections. We found that the majority of strains obtained in our surveys can be classified in the hypoxyloid and xylaroid subfamilies, although many also were found outside of these lineages (as currently circumscribed). Many endophytes were placed in lineages previously not known for endophytism. Most endophytes appear to represent novel species, but inferences are limited by potential gaps in public databases. By linking our data, publicly available sequence data, and records of ascomata, we identify many geographically widespread, host-generalist clades capable of symbiotic associations with diverse photosynthetic partners. Concomitant with such cosmopolitan host use and distributions, many xylariaceous endophytes appear to inhabit both living and non-living plant tissues, with potentially important roles as saprotrophs. Overall, our study reveals major gaps in the availability of multi-locus datasets and metadata for this iconic family, and provides new hypotheses regarding the ecology and evolution of endophytism and other trophic modes across the family Xylariaceae.
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Affiliation(s)
- Jana M U'Ren
- University of Arizona, School of Plant Sciences, 1140 E. South Campus Dr., Forbes 303, Tucson, AZ 85721, USA.
| | | | - Naupaka B Zimmerman
- University of Arizona, School of Plant Sciences, 1140 E. South Campus Dr., Forbes 303, Tucson, AZ 85721, USA
| | - François Lutzoni
- Duke University, Department of Biology, Durham, NC 27708-0338, USA
| | - Jason E Stajich
- University of California, Riverside, Department of Plant Pathology and Microbiology and Institute for Integrated Genome Biology, 900 University Ave., Riverside, CA 92521, USA
| | - A Elizabeth Arnold
- University of Arizona, School of Plant Sciences, 1140 E. South Campus Dr., Forbes 303, Tucson, AZ 85721, USA; University of Arizona, Department of Ecology and Evolutionary Biology, 1041 E. Lowell St., BioSciences West 310, Tucson, AZ 85721, USA
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49
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Yuan C, Guo YH, Wang HY, Ma XJ, Jiang T, Zhao JL, Zou ZM, Ding G. Allelopathic Polyketides from an Endolichenic Fungus Myxotrichum SP. by Using OSMAC Strategy. Sci Rep 2016; 6:19350. [PMID: 26839041 PMCID: PMC4738244 DOI: 10.1038/srep19350] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 12/02/2015] [Indexed: 12/11/2022] Open
Abstract
Three new polyketides myxotritones A-C (2-4), together with a new natural product 7,8-dihydro-7R,8S-dihydroxy-3,7-dimethyl-2-benzopyran-6-one (1) were obtained from the endolichenic fungus Myxotrichum sp. by using OMSAC (One Strain, Many Compounds) method. The planar structures of these new compounds were determined by NMR experiment and HRESIMS data, and the absolute configuration of 1 was established by X-ray diffraction, and the stereochemistry of the new compounds 2-4 were determined by same biosynthesis origin, and similar CD spectra with 1. Allelopathic test showed that compound 4 significantly retarded root elongation of Arabidopsis thaliana seed, indicating that this fungus might contribute to the defense of its host lichen. From the view of biosynthetic pathway, all four compounds 1-4 might be originated from Non-Reduced Polyketide synthase (NR-PKS).
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Affiliation(s)
- Chao Yuan
- Institute of Medicinal Plant Development Yunnan Branch, Chinese Academy of Medical Sciences and Peking Union Medical College, Jinghong, P.R. China
| | - Yu-Hua Guo
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
| | - Hai-Ying Wang
- College of Life Sciences, Shandong Normal University, No. 88 East Wenhua Road, Jinan, P.R. China
| | - Xiao-Jun Ma
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
| | - Tao Jiang
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
| | - Jun-Ling Zhao
- Institute of Medicinal Plant Development Yunnan Branch, Chinese Academy of Medical Sciences and Peking Union Medical College, Jinghong, P.R. China
| | - Zhong-Mei Zou
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
| | - Gang Ding
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, P.R. China
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50
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Molecular Characterization and Antimicrobial Activity of an Endolichenic Fungus, Aspergillus sp. Isolated from Parmelia caperata of Similipal Biosphere Reserve, India. Interdiscip Sci 2016; 9:237-246. [DOI: 10.1007/s12539-016-0146-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Revised: 11/29/2015] [Accepted: 01/08/2016] [Indexed: 10/22/2022]
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