1
|
Zhu AH, Song ZK, Wang JF, Guan HW, Ma HX. Multi-Locus Phylogeny and Morphology Reveal Two New Species of Hypoxylon (Hypoxylaceae, Xylariales) from Motuo, China. Microorganisms 2023; 12:72. [PMID: 38257899 PMCID: PMC10819716 DOI: 10.3390/microorganisms12010072] [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: 11/08/2023] [Revised: 12/12/2023] [Accepted: 12/28/2023] [Indexed: 01/24/2024] Open
Abstract
Hypoxylaceous fungi are abundant in China, but their discovery and report are uneven in various provinces, with more fungi in Yunnan and Hainan and fewer fungi in Tibet. During the investigation of macro-fungi in Motuo county, Tibet Autonomous Region, we collected a number of xylarialean specimens. Six hypoxylaceous specimens growing on dead angiosperm were collected from the forests of Motuo county, and they were described and illustrated as two new species in Hypoxylon based on a combination of morphological characters and molecular evidence. Hypoxylon diperithecium was characterized by its bistratal perithecia, purple-brown stromatal granules, citrine to rust KOH-extractable pigments, and light brown to brown ascospores ellipsoid-inequilateral with conspicuous coil-like ornamentation. Hypoxylon tibeticum was distinct from other species by having pulvinate and applanate stromata, surface vinaceous, with orange granules, orange KOH-extractable pigments, and brown ascospores with inconspicuous ornamentation. The multi-gene phylogenetic analyses (ITS-LSU-RPB2-TUB) supported the two new taxa as separate lineages in the genus Hypoxylon. A key to all known Hypoxylon taxa from China is provided.
Collapse
Affiliation(s)
- An-Hong Zhu
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China; (A.-H.Z.); (Z.-K.S.); (J.-F.W.); (H.-W.G.)
- School of Ecology and Nature Conservation, Beijing Forestry University, Beijing 100083, China
- Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China
| | - Zi-Kun Song
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China; (A.-H.Z.); (Z.-K.S.); (J.-F.W.); (H.-W.G.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China
| | - Jun-Fang Wang
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China; (A.-H.Z.); (Z.-K.S.); (J.-F.W.); (H.-W.G.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China
| | - Hao-Wen Guan
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China; (A.-H.Z.); (Z.-K.S.); (J.-F.W.); (H.-W.G.)
- School of Life Science, Liaoning University, Shenyang 110036, China
| | - Hai-Xia Ma
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China; (A.-H.Z.); (Z.-K.S.); (J.-F.W.); (H.-W.G.)
- Haikou Key Laboratory for Protection and Utilization of Edible and Medicinal Fungi, Haikou 571101, China
- Hainan Key Laboratory of Tropical Microbe Resources, Haikou 571101, China
| |
Collapse
|
2
|
Cedeño-Sanchez M, Charria-Girón E, Lambert C, Luangsa-ard JJ, Decock C, Franke R, Brönstrup M, Stadler M. Segregation of the genus Parahypoxylon (Hypoxylaceae, Xylariales) from Hypoxylon by a polyphasic taxonomic approach. MycoKeys 2023; 95:131-162. [DOI: 10.3897/mycokeys.95.98125] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Accepted: 01/31/2023] [Indexed: 02/22/2023] Open
Abstract
During a mycological survey of the Democratic Republic of the Congo, a fungal specimen that morphologically resembled the American species Hypoxylon papillatum was encountered. A polyphasic approach including morphological and chemotaxonomic together with a multigene phylogenetic study (ITS, LSU, tub2, and rpb2) of Hypoxylon spp. and representatives of related genera revealed that this strain represents a new species of the Hypoxylaceae. However, the multi-locus phylogenetic inference indicated that the new fungus clustered with H. papillatum in a separate clade from the other species of Hypoxylon. Studies by ultrahigh performance liquid chromatography coupled to diode array detection and ion mobility tandem mass spectrometry (UHPLC-DAD-IM-MS/MS) were carried out on the stromatal extracts. In particular, the MS/MS spectra of the major stromatal metabolites of these species indicated the production of hitherto unreported azaphilone pigments with a similar core scaffold to the cohaerin-type metabolites, which are exclusively found in the Hypoxylaceae. Based on these results, the new genus Parahypoxylon is introduced herein. Aside from P. papillatum, the genus also includes P. ruwenzoriensesp. nov., which clustered together with the type species within a basal clade of the Hypoxylaceae together with its sister genus Durotheca.
Collapse
|
3
|
Song ZK, Zhu AH, Liu ZD, Qu Z, Li Y, Ma HX. Three New Species of Hypoxylon (Xylariales, Ascomycota) on a Multigene Phylogeny from Medog in Southwest China. J Fungi (Basel) 2022; 8:jof8050500. [PMID: 35628755 PMCID: PMC9146989 DOI: 10.3390/jof8050500] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2022] [Revised: 05/06/2022] [Accepted: 05/08/2022] [Indexed: 11/28/2022] Open
Abstract
During a survey of hypoxylaceous fungi in Medog county (Tibet Autonomous Region, China), three new species, including Hypoxylon damuense, Hypoxylon medogense, and Hypoxylon zangii, were described and illustrated based on morphological and multi-gene phylogenetic analyses. Hypoxylon damuense is characterized by its yellow-brown stromatal granules, light-brown to brown ascospores, and frequently indehiscent perispore. Hypoxylon medogense is morphologically and phylogenetically related to H. erythrostroma but differs in having larger ascospores with straight spore-length germ slit and conspicuously coil-like perispore ornamentation. Hypoxylon zangii shows morphological similarities to H. texense but differs in having Amber (47), Fulvous (43) and Sienna (8) KOH-extractable pigments and larger ascospores with straight spore-length germ slit. The multi-gene phylogenetic analyses inferred from the datasets of ITS-RPB2-LSU-TUB2 supported the three new taxa as separate lineages within Hypoxylon. A key to all known Hypoxylon species from China and related species worldwide is provided.
Collapse
Affiliation(s)
- Zi-Kun Song
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (Z.-K.S.); (Z.Q.)
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
| | - An-Hong Zhu
- Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China;
| | - Zhen-Dong Liu
- Food Science College, Tibet Agriculture & Animal Husbandry University, Nyingchi 860000, China;
| | - Zhi Qu
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (Z.-K.S.); (Z.Q.)
| | - Yu Li
- College of Plant Protection, Jilin Agricultural University, Changchun 130118, China;
| | - Hai-Xia Ma
- Institute of Tropical Bioscience and Biotechnology, Chinese Academy of Tropical Agricultural Sciences, Haikou 571101, China; (Z.-K.S.); (Z.Q.)
- Hainan Institute for Tropical Agricultural Resources, Haikou 571101, China
- Hainan Key Laboratory of Tropical Microbe Resources, Haikou 571101, China
- Correspondence:
| |
Collapse
|
4
|
Multi-Gene Phylogeny and Taxonomy of Hypoxylon (Hypoxylaceae, Ascomycota) from China. DIVERSITY 2022. [DOI: 10.3390/d14010037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The Hypoxylon species play an important ecological role in tropical rainforest as wood-decomposers, and some might have benefical effects on their hosts as endophytes. The present work concerns a survey of the genus Hypoxylon from Hainan Tropical Rainforest National Park of China. Four new species: H. wuzhishanense, H. hainanense, H.chrysalidosporum, and H.cyclobalanopsidis, were discovered based on a combination of morphological characteristics and molecular data. Hypoxylon wuzhishanense is characterized by Rust pulvinate stromata, amyloid apical apparatus and brown ascospores, with most of the perispore being indehiscent in 10% KOH. Hypoxylon hainanense has effused–pulvinate and Violet stromata, amyloid apical apparatus, light-brown to brown ascospores with straight germ slit and dehiscent perispore. Hypoxylonchrysalidosporum is distinguished by glomerate to pulvinate stromata, highly reduced or absent inamyloid apical apparatus, and light-brown to brown ascospores with very conspicuous coil-like ornamentation. Hypoxyloncyclobalanopsidis has Livid Purple pulvinate stromata, highly reduced amyloid apical apparatus, faint bluing, brown ascospores and dehiscent perispore, and it grows on dead branches of Cyclobalanopsis. Detailed descriptions, illustrations, and contrasts with morphologically similar species are provided. Phylogenetic analyses inferred from ITS, RPB2, LSU, and β-tubulin sequences confirmed that the four new species are distinct within the genus Hypoxylon.
Collapse
|
5
|
Kuhnert E, Navarro-Muñoz J, Becker K, Stadler M, Collemare J, Cox R. Secondary metabolite biosynthetic diversity in the fungal family Hypoxylaceae and Xylaria hypoxylon. Stud Mycol 2021; 99:100118. [PMID: 34527085 PMCID: PMC8403587 DOI: 10.1016/j.simyco.2021.100118] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
To date little is known about the genetic background that drives the production and diversification of secondary metabolites in the Hypoxylaceae. With the recent availability of high-quality genome sequences for 13 representative species and one relative (Xylaria hypoxylon) we attempted to survey the diversity of biosynthetic pathways in these organisms to investigate their true potential as secondary metabolite producers. Manual search strategies based on the accumulated knowledge on biosynthesis in fungi enabled us to identify 783 biosynthetic pathways across 14 studied species, the majority of which were arranged in biosynthetic gene clusters (BGC). The similarity of BGCs was analysed with the BiG-SCAPE engine which organised the BGCs into 375 gene cluster families (GCF). Only ten GCFs were conserved across all of these fungi indicating that speciation is accompanied by changes in secondary metabolism. From the known compounds produced by the family members some can be directly correlated with identified BGCs which is highlighted herein by the azaphilone, dihydroxynaphthalene, tropolone, cytochalasan, terrequinone, terphenyl and brasilane pathways giving insights into the evolution and diversification of those compound classes. Vice versa, products of various BGCs can be predicted through homology analysis with known pathways from other fungi as shown for the identified ergot alkaloid, trigazaphilone, curvupallide, viridicatumtoxin and swainsonine BGCs. However, the majority of BGCs had no obvious links to known products from the Hypoxylaceae or other well-studied biosynthetic pathways from fungi. These findings highlight that the number of known compounds strongly underrepresents the biosynthetic potential in these fungi and that a tremendous number of unidentified secondary metabolites is still hidden. Moreover, with increasing numbers of genomes for further Hypoxylaceae species becoming available, the likelihood of revealing new biosynthetic pathways that encode new, potentially useful compounds will significantly improve. Reaching a better understanding of the biology of these producers, and further development of genetic methods for their manipulation, will be crucial to access their treasures.
Collapse
Affiliation(s)
- E. Kuhnert
- Centre of Biomolecular Drug Research (BMWZ), Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 38, 30167, Hannover, Germany
| | - J.C. Navarro-Muñoz
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands
| | - K. Becker
- Centre of Biomolecular Drug Research (BMWZ), Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 38, 30167, Hannover, Germany
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - M. Stadler
- Department Microbial Drugs, Helmholtz Centre for Infection Research (HZI), German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Inhoffenstrasse 7, 38124, Braunschweig, Germany
| | - J. Collemare
- Westerdijk Fungal Biodiversity Institute, Uppsalalaan 8, 3584 CT, Utrecht, The Netherlands
| | - R.J. Cox
- Centre of Biomolecular Drug Research (BMWZ), Institute for Organic Chemistry, Leibniz University Hannover, Schneiderberg 38, 30167, Hannover, Germany
| |
Collapse
|
6
|
Konta S, Hyde KD, Eungwanichayapant PD, Karunarathna SC, Samarakoon MC, Xu J, Dauner LAP, Aluthwattha ST, Lumyong S, Tibpromma S. Multigene Phylogeny Reveals Haploanthostomella elaeidis gen. et sp. nov. and Familial Replacement of Endocalyx (Xylariales, Sordariomycetes, Ascomycota). Life (Basel) 2021; 11:486. [PMID: 34073589 PMCID: PMC8227165 DOI: 10.3390/life11060486] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/17/2021] [Accepted: 05/19/2021] [Indexed: 11/17/2022] Open
Abstract
During our investigation of palm fungi in Thailand, two interesting taxa from Elaeis guineensis and Metroxylon sagu (Arecaceae) were collected. Based on phylogenetic analyses of a combined dataset of ITS, LSU, rpb2, and tub2 nucleotide sequences as well as unique morphological characteristics, we introduce the new genus Haploanthostomella within Xylariales, and a new species Endocalyx metroxyli. Additionally, in our study, the genus Endocalyx is transferred to the family Cainiaceae based on its brown conidia and molecular phylogenetic evidence.
Collapse
Affiliation(s)
- Sirinapa Konta
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; (S.K.); (S.C.K.); (J.X.); (L.A.P.D.)
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; (K.D.H.); (M.C.S.)
- School of Science, Mae Fah Luang University, Chiang Rai 57100, Thailand;
| | - Kevin D. Hyde
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; (K.D.H.); (M.C.S.)
| | | | - Samantha C. Karunarathna
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; (S.K.); (S.C.K.); (J.X.); (L.A.P.D.)
- World Agroforestry Centre, East and Central Asia, Kunming 650201, China
- Centre for Mountain Futures, Kunming Institute of Botany, Kunming 650201, China
| | - Milan C. Samarakoon
- Center of Excellence in Fungal Research, Mae Fah Luang University, Chiang Rai 57100, Thailand; (K.D.H.); (M.C.S.)
| | - Jianchu Xu
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; (S.K.); (S.C.K.); (J.X.); (L.A.P.D.)
- World Agroforestry Centre, East and Central Asia, Kunming 650201, China
- Centre for Mountain Futures, Kunming Institute of Botany, Kunming 650201, China
| | - Lucas A. P. Dauner
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; (S.K.); (S.C.K.); (J.X.); (L.A.P.D.)
| | - Sasith Tharanga Aluthwattha
- Guangxi Key Laboratory of Forest Ecology and Conservation, College of Forestry, Guangxi University, Daxuedonglu 100, Nanning 530004, China;
- State Key Laboratory of Conservation and Utilization of Subtropical Agro-Bioresources, College of Forestry, Guangxi University, Daxuedonglu 100, Nanning 530004, China
| | - Saisamorn Lumyong
- Research Center of Microbial Diversity and Sustainable Utilization, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;
- Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand
| | - Saowaluck Tibpromma
- CAS Key Laboratory for Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China; (S.K.); (S.C.K.); (J.X.); (L.A.P.D.)
- World Agroforestry Centre, East and Central Asia, Kunming 650201, China
- Centre for Mountain Futures, Kunming Institute of Botany, Kunming 650201, China
| |
Collapse
|
7
|
Medina PDV, Kuhnert E, Hladki AI, Sir EB. Hypoxylon ochraceotuberosum and Hypoxylon rickii (Ascomycota, Hypoxylaceae) in Las Yungas of Salta province, Northwest of Argentina. RODRIGUÉSIA 2021. [DOI: 10.1590/2175-7860202172030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Abstract Hypoxylon ochraceotuberosum and H. rickii are reported for the first time for the Argentinean funga based on recently collected specimens from the northwestern montane forest. Until now, H. ochraceotuberosum has only been known to occur in the Martinique (French West Indies). In contrast, H. rickii was already recorded for the Southern Cone, but based on specimens collected in the Atlantic Rain Forests from Southeast Brazil. Detailed descriptions and photo illustrations are provided for each species.
Collapse
|
8
|
Chen C, Tao H, Chen W, Yang B, Zhou X, Luo X, Liu Y. Recent advances in the chemistry and biology of azaphilones. RSC Adv 2020; 10:10197-10220. [PMID: 35498578 PMCID: PMC9050426 DOI: 10.1039/d0ra00894j] [Citation(s) in RCA: 52] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 03/03/2020] [Indexed: 01/02/2023] Open
Abstract
Recent advances in the chemistry and biology of structurally diverse azaphilones from 2012 to 2019.
Collapse
Affiliation(s)
- Chunmei Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Guangdong Key Laboratory of Marine Materia Medica
- South China Sea Institute of Oceanology
- Chinese Academy of Sciences
- Guangzhou 510301
| | - Huaming Tao
- School of Traditional Chinese Medicine
- Southern Medical University
- Guangzhou 510515
- P. R. China
| | - Weihao Chen
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Guangdong Key Laboratory of Marine Materia Medica
- South China Sea Institute of Oceanology
- Chinese Academy of Sciences
- Guangzhou 510301
| | - Bin Yang
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Guangdong Key Laboratory of Marine Materia Medica
- South China Sea Institute of Oceanology
- Chinese Academy of Sciences
- Guangzhou 510301
| | - Xuefeng Zhou
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Guangdong Key Laboratory of Marine Materia Medica
- South China Sea Institute of Oceanology
- Chinese Academy of Sciences
- Guangzhou 510301
| | - Xiaowei Luo
- Institute of Marine Drugs
- Guangxi University of Chinese Medicine
- Nanning 530200
- P. R. China
| | - Yonghong Liu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology
- Guangdong Key Laboratory of Marine Materia Medica
- South China Sea Institute of Oceanology
- Chinese Academy of Sciences
- Guangzhou 510301
| |
Collapse
|
9
|
Sir EB, Becker K, Lambert C, Bills GF, Kuhnert E. Observations on Texas hypoxylons, including two new Hypoxylon species and widespread environmental isolates of the H. croceum complex identified by a polyphasic approach. Mycologia 2019; 111:832-856. [PMID: 31460851 DOI: 10.1080/00275514.2019.1637705] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Two new species and a new combination of Hypoxylon from Texas were identified and described based on morphological, multigene phylogenetic (ITS [nuc rDNA internal transcribed spacer region ITS1-5.8S-ITS2], 28S [5' 1200 bp of nuc 28S rDNA], RPB2 [partial second largest subunit of the DNA-directed RNA polymerase II], TUB2 [partial β-tubulin]), and chemotaxonomic data. Hypoxylon olivaceopigmentum is characterized by its pulvinate to glomerate stromata, olivaceous KOH-extractable pigments, equilateral ascospores, and indehiscent perispore. Hypoxylon texense can be distinguished from morphologically similar species by its rust to dark brick KOH-extractable pigments and the high-performance liquid chromatography (HPLC) profile of its stromatal secondary metabolites. Hypoxylon hinnuleum is proposed as the sexual morph of Nodulisporium hinnuleum, featuring dark vinaceous glomerate stromata with dark brick KOH-extractable pigments composed of cohaerin-type azaphilones and smooth equilateral ascospores with indehiscent perispore. Based on these diagnostic characters, H. hinnuleum forms a complex with H. croceum and H. minicroceum. More than 50 ITS sequences with high identity originating from North American and East Asian environmental isolates formed a well-supported clade with the type of N. hinnuleum, demonstrating the widespread distribution of the species complex. In addition, updated descriptions and comprehensive illustrations with detailed information on the diagnostic features of H. fendleri and H. perforatum are provided. The multilocus phylogenetic reconstruction of Hypoxylon supported the status of the new species and broadened the knowledge about intergeneric relationships.
Collapse
Affiliation(s)
- Esteban B Sir
- Instituto de Bioprospección y Fisiología Vegetal-INBIOFIV (CONICET-UNT) , San Miguel de Tucumán , Argentina.,Laboratorio Criptogámico, Fundación Miguel Lillo, San Miguel de Tucumán , Argentina
| | - Kevin Becker
- Department of Microbial Drugs, Helmholtz-Zentrum für Infektionsforschung GmbH , 38124 Braunschweig , Germany.,German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig , 38124 Braunschweig , Germany
| | - Christopher Lambert
- Department of Microbial Drugs, Helmholtz-Zentrum für Infektionsforschung GmbH , 38124 Braunschweig , Germany.,German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig , 38124 Braunschweig , Germany
| | - Gerald F Bills
- Texas Therapeutics Institute, the Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston , Houston , Texas 77054
| | - Eric Kuhnert
- Institute for Organic Chemistry and Centre of Biomolecular Drug Research (BMWZ), Leibniz University Hannover , Hannover , 30167 , Germany
| |
Collapse
|
10
|
Helaly SE, Thongbai B, Stadler M. Diversity of biologically active secondary metabolites from endophytic and saprotrophic fungi of the ascomycete order Xylariales. Nat Prod Rep 2019; 35:992-1014. [PMID: 29774351 DOI: 10.1039/c8np00010g] [Citation(s) in RCA: 127] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Covering: up to December 2017 The diversity of secondary metabolites in the fungal order Xylariales is reviewed with special emphasis on correlations between chemical diversity and biodiversity as inferred from recent taxonomic and phylogenetic studies. The Xylariales are arguably among the predominant fungal endophytes, which are the producer organisms of pharmaceutical lead compounds including the antimycotic sordarins and the antiparasitic nodulisporic acids, as well as the marketed drug, emodepside. Many Xylariales are "macromycetes", which form conspicuous fruiting bodies (stromata), and the metabolite profiles that are predominant in the stromata are often complementary to those encountered in corresponding mycelial cultures of a given species. Secondary metabolite profiles have recently been proven highly informative as additional parameters to support classical morphology and molecular phylogenetic approaches in order to reconstruct evolutionary relationships among these fungi. Even the recent taxonomic rearrangement of the Xylariales has been relying on such approaches, since certain groups of metabolites seem to have significance at the species, genus or family level, respectively, while others are only produced in certain taxa and their production is highly dependent on the culture conditions. The vast metabolic diversity that may be encountered in a single species or strain is illustrated based on examples like Daldinia eschscholtzii, Hypoxylon rickii, and Pestalotiopsis fici. In the future, it appears feasible to increase our knowledge of secondary metabolite diversity by embarking on certain genera that have so far been neglected, as well as by studying the volatile secondary metabolites more intensively. Methods of bioinformatics, phylogenomics and transcriptomics, which have been developed to study other fungi, are readily available for use in such scenarios.
Collapse
Affiliation(s)
- Soleiman E Helaly
- Dept Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany.
| | | | | |
Collapse
|
11
|
Kuhnert E, Surup F, Halecker S, Stadler M. Minutellins A - D, azaphilones from the stromata of Annulohypoxylon minutellum (Xylariaceae). PHYTOCHEMISTRY 2017; 137:66-71. [PMID: 28215421 DOI: 10.1016/j.phytochem.2017.02.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/17/2016] [Revised: 02/03/2017] [Accepted: 02/08/2017] [Indexed: 06/06/2023]
Abstract
During the course of our screening for new metabolites with chemotaxonomic importance from stromata of fungi from the family Xylariaceae, we characterized several interesting metabolites in the fungus Annulohypoxylon minutellum. Extraction of the fruiting bodies and purification by preparative HPLC resulted in the isolation of five metabolites. The main compound was identified as the known metabolite hinnulin A (5), while four minor compounds were found to represent previously undescribed azaphilones, named minutellins A - D (1-4). Their planar structures were elucidated using NMR and HRESIMS data; absolute stereochemistry was assigned by CD data and Mosher's method. Compounds 1, 3 and 5 showed cytotoxic effects against murine and human cells. As the production of 1-5 is restricted to a group of closely related Annulohypoxylon species, they serve well as chemotaxonomic marker.
Collapse
Affiliation(s)
- Eric Kuhnert
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Frank Surup
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Sandra Halecker
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner Site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany.
| |
Collapse
|
12
|
Phylogenetic and chemotaxonomic resolution of the genus Annulohypoxylon (Xylariaceae) including four new species. FUNGAL DIVERS 2016. [DOI: 10.1007/s13225-016-0377-6] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
|
13
|
|
14
|
Kuhnert E, Surup F, Herrmann J, Huch V, Müller R, Stadler M. Rickenyls A-E, antioxidative terphenyls from the fungus Hypoxylon rickii (Xylariaceae, Ascomycota). PHYTOCHEMISTRY 2015; 118:68-73. [PMID: 26296745 DOI: 10.1016/j.phytochem.2015.08.004] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Revised: 08/05/2015] [Accepted: 08/09/2015] [Indexed: 06/04/2023]
Abstract
Our screening efforts for new natural products with interesting bioactivity have revealed the neotropical ascomycete Hypoxylon rickii as a prolific source. We isolated five secondary metabolites with a p-terphenyl backbone from the mycelial extract of a fermentation of this fungus in 70 l scale by using RP-HPLC, which were named rickenyls A-E (1-5). Their structures were elucidated by X-ray crystallography and NMR spectroscopy, complemented by HRESIMS. Two of the compounds contained a quinone core structure in ortho (2) and para-position (5), respectively. We obtained 2 spontaneously and by lead tetraacetate oxidation from 1. All compounds were screened for antimicrobial, antioxidative and cytotoxic activities. Rickenyl A (1) exhibited strong antioxidative effects and moderate cytotoxic activity against various cancer cell lines.
Collapse
Affiliation(s)
- Eric Kuhnert
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Frank Surup
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Jennifer Herrmann
- German Centre for Infection Research Association (DZIF), Partner site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University Campus, Building C2.3, 66123 Saarbrücken, Germany
| | - Volker Huch
- Universität des Saarlandes, Institut für Anorganische Chemie, 66123 Saarbrücken, Germany
| | - Rolf Müller
- German Centre for Infection Research Association (DZIF), Partner site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany; Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research and Pharmaceutical Biotechnology, Saarland University Campus, Building C2.3, 66123 Saarbrücken, Germany
| | - Marc Stadler
- Helmholtz Centre for Infection Research GmbH (HZI), Department Microbial Drugs, Inhoffenstraße 7, 38124 Braunschweig, Germany; German Centre for Infection Research Association (DZIF), Partner site Hannover-Braunschweig, Inhoffenstraße 7, 38124 Braunschweig, Germany.
| |
Collapse
|
15
|
Surup F, Kuhnert E, Liscinskij E, Stadler M. Silphiperfolene-Type Terpenoids and Other Metabolites from Cultures of the Tropical Ascomycete Hypoxylon rickii (Xylariaceae). NATURAL PRODUCTS AND BIOPROSPECTING 2015; 5:167-73. [PMID: 26077652 PMCID: PMC4488154 DOI: 10.1007/s13659-015-0065-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Accepted: 05/31/2015] [Indexed: 05/13/2023]
Abstract
A culture isolated from ascospores of Hypoxylon rickii, a xylariaceous ascomycete collected in Martinique, had yielded botryane, noreremophilane and abietane-type terpenoids in a preceding study, but additional metabolites were detected by extensive HPLC-MS analysis in other fractions. Herein we report the further isolation of four new sesquiterpenoids with a silphiperfol-6-ene skeleton from extracts of H. rickii. The planar structures were elucidated by NMR and HRMS data as 13-hydroxysilphiperfol-6-ene (1), 9-hydroxysilphiperfol-6-en-13-oic acid (2), 2-hydroxysilphiperfol-6-en-13-oic acid (3) and 15-hydroxysilphiperfol-6-en-13-oic acid (4). For compounds 2-4 we propose the trivial names rickinic acids A-C. Their stereochemistry was assigned by ROESY correlations as well as by the specific optical rotation. Additionally, the known compounds, botryenanol, dehydrobotrydienol, cyclo(Phe-Pro), cyclo(Pro-Leu), (+)-ramulosin and α-eleostearic acid were isolated. The antimicrobial and cytotoxic activities of the new compounds are also reported.
Collapse
Affiliation(s)
- Frank Surup
- />Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH, Inhoffenstraße 7, 38124 Braunschweig, Germany
- />German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Eric Kuhnert
- />Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH, Inhoffenstraße 7, 38124 Braunschweig, Germany
- />German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Elena Liscinskij
- />Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH, Inhoffenstraße 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- />Department Microbial Drugs, Helmholtz Centre for Infection Research GmbH, Inhoffenstraße 7, 38124 Braunschweig, Germany
- />German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| |
Collapse
|