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Cardile V, Graziano ACE, Avola R, Madrid A, Russo A. Physodic acid sensitizes LNCaP prostate cancer cells to TRAIL-induced apoptosis. Toxicol In Vitro 2022; 84:105432. [PMID: 35809792 DOI: 10.1016/j.tiv.2022.105432] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 07/02/2022] [Accepted: 07/04/2022] [Indexed: 10/17/2022]
Abstract
In spite of the extensive research for developing new therapies, prostate cancer is still one of the major human diseases with poor prognosis and high mortality. Therefore, with the aim of identifying novel agents with antigrowth and pro-apoptotic activity on prostate cancer cells, in the present study, we evaluated the effect of lichen secondary metabolite physodic acid on cell growth in human prostate cancer cells. In addition, we tested the apoptotic activity of physodic acid on TRAIL-resistant LNCaP cells in combination with TRAIL. The cell viability was measured using MTT assay. LDH release, a marker of membrane breakdown, was also measured. For the detection of apoptosis, the evaluation of DNA fragmentation and caspase-3 activity assay were employed. The expression of proteins was detected by Western blot analysis. It was observed that physodic acid showed a dose-response relationship in the range of 12.5-50 μM concentrations in LNCaP and DU-145 cells, activating an apoptotic process. In addition, physodic acid sensitizes LNCaP cells to TRAIL-induced apoptosis. The combination of physodic acid with other anti-prostate cancer therapies could be considered a promising strategy that warrants further investigations.
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Affiliation(s)
- Venera Cardile
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia, 89, 95123 Catania, Italy
| | - Adriana C E Graziano
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia, 89, 95123 Catania, Italy
| | - Rosanna Avola
- Department of Biomedical and Biotechnological Sciences, University of Catania, Via S. Sofia, 89, 95123 Catania, Italy
| | - Alejandro Madrid
- Departamento de Química, Facultad de Ciencias Naturales y Exactas, Universidad de Playa Ancha, Avda. Leopoldo Carvallo 270, Playa Ancha, Valparaíso 2340000, Chile
| | - Alessandra Russo
- Department of Drug and Health Sciences, University of Catania, V.le A. Doria 6, 95125 Catania, Italy.
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Dar TUH, Dar SA, Islam SU, Mangral ZA, Dar R, Singh BP, Verma P, Haque S. Lichens as a repository of bioactive compounds: an open window for green therapy against diverse cancers. Semin Cancer Biol 2021; 86:1120-1137. [PMID: 34052413 DOI: 10.1016/j.semcancer.2021.05.028] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 05/10/2021] [Accepted: 05/24/2021] [Indexed: 01/09/2023]
Abstract
Lichens, algae and fungi-based symbiotic associations, are sources of many important secondary metabolites, such as antibiotics, anti-inflammatory, antioxidants, and anticancer agents. Wide range of experiments based on in vivo and in vitro studies revealed that lichens are a rich treasure of anti-cancer compounds. Lichen extracts and isolated lichen compounds can interact with all biological entities currently identified to be responsible for tumor development. The critical ways to control the cancer development include induction of cell cycle arrests, blocking communication of growth factors, activation of anti-tumor immunity, inhibition of tumor-friendly inflammation, inhibition of tumor metastasis, and suppressing chromosome dysfunction. Also, lichen-based compounds induce the killing of cells by the process of apoptosis, autophagy, and necrosis, that inturn positively modulates metabolic networks of cells against uncontrolled cell division. Many lichen-based compounds have proven to possess potential anti-cancer activity against a wide range of cancer cells, either alone or in conjunction with other anti-cancer compounds. This review primarily emphasizes on an updated account of the repository of secondary metabolites reported in lichens. Besides, we discuss the anti-cancer potential and possible mechanism of the most frequently reported secondary metabolites derived from lichens.
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Affiliation(s)
- Tanvir Ul Hassan Dar
- Department of Biotechnology, School of Biosciences and Biotechnology, BGSB University, Rajouri, Jammu and Kashmir, India.
| | - Sajad Ahmad Dar
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia
| | - Shahid Ul Islam
- Department of Biotechnology, School of Biosciences and Biotechnology, BGSB University, Rajouri, Jammu and Kashmir, India
| | - Zahid Ahmed Mangral
- Department of Biotechnology, School of Biosciences and Biotechnology, BGSB University, Rajouri, Jammu and Kashmir, India
| | - Rubiya Dar
- Centre of Research for Development, University of Kashmir, Srinagar, Jammu and Kashmir, India
| | - Bhim Pratap Singh
- Department of Agriculture & Environmental Sciences, National Institute of Food Technology Entrepreneurship & Management (NIFTEM), Sonepat, Haryana, India
| | - Pradeep Verma
- Bioprocess and Bioenergy Laboratory, Department of Microbiology, Central University of Rajasthan, Ajmer, Rajasthan, India
| | - Shafiul Haque
- Research and Scientific Studies Unit, College of Nursing and Allied Health Sciences, Jazan University, Jazan, Saudi Arabia.
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Kerboua M, Ahmed MA, Samba N, Aitfella-Lahlou R, Silva L, Boyero JF, Raposo C, Lopez Rodilla JM. Phytochemical Investigation of New Algerian Lichen Species: Physcia Mediterranea Nimis. Molecules 2021; 26:1121. [PMID: 33672591 PMCID: PMC7924039 DOI: 10.3390/molecules26041121] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/17/2021] [Accepted: 02/18/2021] [Indexed: 11/16/2022] Open
Abstract
The present study provides new data concerning the chemical characterisation of Physcia mediterranea Nimis, a rare Mediterranean species belonging to the family Physciaceae. The phytochemical screening was carried out using GC-MS, HPLC-ESI-MS-MS, and NMR techniques. Hot extraction of n-hexane was carried out, followed by separation of the part insoluble in methanol: wax (WA-hex), from the part soluble in methanol (ME-hex). GC-MS analysis of the ME-hex part revealed the presence of methylbenzoic acids such as sparassol and atraric acid and a diterpene with a kaurene skeleton which has never been detected before in lichen species. Out of all the compounds identified by HPLC-ESI-MS-MS, sixteen compounds are common between WA-hex and ME-hex. Most are aliphatic fatty acids, phenolic compounds and depsides. The wax part is characterised by the presence of atranorin, a depside of high biological value. Proton 1H and carbon 13C NMR have confirmed its identification. Atranol, chloroatranol (depsides compound), Ffukinanolide (sesquiterpene lactones), leprolomin (diphenyl ether), muronic acid (triterpenes), and ursolic acid (triterpenes) have also been identified in ME-hex. The results suggested that Physcia mediterranea Nimis is a valuable source of bioactive compounds that could be useful for several applications as functional foods, cosmetics, and pharmaceuticals.
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Affiliation(s)
- Marwa Kerboua
- Laboratory of Vegetal Biology and Environment, Biology Department, Badji Mokhtar University, Annaba 23000, Algeria; (M.K.); (M.A.A.)
| | - Monia Ali Ahmed
- Laboratory of Vegetal Biology and Environment, Biology Department, Badji Mokhtar University, Annaba 23000, Algeria; (M.K.); (M.A.A.)
| | - Nsevolo Samba
- Chemistry Department, University of Beira Interior, 6201-001 Covilha, Portugal; (N.S.); (R.A.-L.); (L.S.)
- Department of Clinical Analysis and Public Health, University Kimpa Vita, Uige 77, Angola
| | - Radhia Aitfella-Lahlou
- Chemistry Department, University of Beira Interior, 6201-001 Covilha, Portugal; (N.S.); (R.A.-L.); (L.S.)
- Fiber Materials and Environmental Technologies (FibEnTech), University of Beira Interior, 6201-001 Covilhã, Portugal
- Laboratory of Valorisation and Conservation of Biological Resources, Biology Department, Faculty of Sciences, University M’Hamed Bougara, Boumerdes 35000, Algeria
| | - Lucia Silva
- Chemistry Department, University of Beira Interior, 6201-001 Covilha, Portugal; (N.S.); (R.A.-L.); (L.S.)
- Fiber Materials and Environmental Technologies (FibEnTech), University of Beira Interior, 6201-001 Covilhã, Portugal
| | - Juan F. Boyero
- Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Chemistry, Chromatographic and mass analysis service (NUCLEUS), University of Salamanca, 37008 Salamanca, Spain; (J.F.B.); (C.R.)
| | - Cesar Raposo
- Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Chemistry, Chromatographic and mass analysis service (NUCLEUS), University of Salamanca, 37008 Salamanca, Spain; (J.F.B.); (C.R.)
| | - Jesus Miguel Lopez Rodilla
- Chemistry Department, University of Beira Interior, 6201-001 Covilha, Portugal; (N.S.); (R.A.-L.); (L.S.)
- Fiber Materials and Environmental Technologies (FibEnTech), University of Beira Interior, 6201-001 Covilhã, Portugal
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Smith‐Ferguson J, Beekman M. Can't see the colony for the bees: behavioural perspectives of biological individuality. Biol Rev Camb Philos Soc 2019; 94:1935-1946. [DOI: 10.1111/brv.12542] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/06/2019] [Accepted: 06/10/2019] [Indexed: 01/01/2023]
Affiliation(s)
- Jules Smith‐Ferguson
- School of Life and Environmental SciencesUniversity of Sydney Sydney New South Wales 2006 Australia
| | - Madeleine Beekman
- School of Life and Environmental SciencesUniversity of Sydney Sydney New South Wales 2006 Australia
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Guzow-Krzemińska B, Jabłońska A, Flakus A, Pamela Rodriguez-Flakus, Kosecka M, Kukwa M. Phylogenetic placement of Leprariacryptovouauxii sp. nov. (Lecanorales, Lecanoromycetes, Ascomycota) with notes on other Lepraria species from South America. MycoKeys 2019; 53:1-22. [PMID: 31160883 PMCID: PMC6536479 DOI: 10.3897/mycokeys.53.33508] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 04/02/2019] [Indexed: 11/25/2022] Open
Abstract
Leprariacryptovouauxii is described as a new semicryptic species similar to L.vouauxii, from which it differs geographically (South America) and phylogenetically; both species differ in nucleotide position characters in nucITS barcoding marker. Leprariaharrisiana is reported as new to South America and L.nothofagi as new to Antarctica, Bolivia, and Peru. Leprariaincana (South American records are referred to L.aff.hodkinsoniana) and L.vouauxii (most South American records are referred to L.cryptovouauxii) should be excluded at least temporarily from the lichen list of South America. All records previously referred to as L.alpina from Bolivia and Peru belong to L.nothofagi. Most of Bolivian records of L.pallida belong to L.harrisiana. Leprariaborealis and L.caesioalba should be included in L.neglecta. Leprariaachariana, L.impossibilis, and L.sipmaniana are sequenced for the first time.
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Affiliation(s)
- Beata Guzow-Krzemińska
- Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL-80-308 Gdańsk, PolandUniversity of GdańskGdańskPoland
| | - Agnieszka Jabłońska
- Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL-80-308 Gdańsk, PolandUniversity of GdańskGdańskPoland
| | - Adam Flakus
- Department of Lichenology, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, PolandW. Szafer Institute of Botany, Polish Academy of SciencesKrakówPoland
| | - Pamela Rodriguez-Flakus
- Laboratory of Molecular Analyses, W. Szafer Institute of Botany, Polish Academy of Sciences, Lubicz 46, PL-31-512 Kraków, PolandInstitute of Botany, Polish Academy of SciencesKrakówPoland
| | - Magdalena Kosecka
- Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL-80-308 Gdańsk, PolandUniversity of GdańskGdańskPoland
| | - Martin Kukwa
- Department of Plant Taxonomy and Nature Conservation, Faculty of Biology, University of Gdańsk, Wita Stwosza 59, PL-80-308 Gdańsk, PolandUniversity of GdańskGdańskPoland
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Fehrer J, Réblová M, Bambasová V, Vohník M. The root-symbiotic Rhizoscyphus ericae aggregate and Hyaloscypha ( Leotiomycetes) are congeneric: Phylogenetic and experimental evidence. Stud Mycol 2019; 92:195-225. [PMID: 31998413 PMCID: PMC6976342 DOI: 10.1016/j.simyco.2018.10.004] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Data mining for a phylogenetic study including the prominent ericoid mycorrhizal fungus Rhizoscyphus ericae revealed nearly identical ITS sequences of the bryophilous Hyaloscypha hepaticicola suggesting they are conspecific. Additional genetic markers and a broader taxonomic sampling furthermore suggested that the sexual Hyaloscypha and the asexual Meliniomyces may be congeneric. In order to further elucidate these issues, type strains of all species traditionally treated as members of the Rhizoscyphus ericae aggregate (REA) and related taxa were subjected to phylogenetic analyses based on ITS, nrLSU, mtSSU, and rpb2 markers to produce comparable datasets while an in vitro re-synthesis experiment was conducted to examine the root-symbiotic potential of H. hepaticicola in the Ericaceae. Phylogenetic evidence demonstrates that sterile root-associated Meliniomyces, sexual Hyaloscypha and Rhizoscyphus, based on R. ericae, are indeed congeneric. To this monophylum also belongs the phialidic dematiaceous hyphomycetes Cadophora finlandica and Chloridium paucisporum. We provide a taxonomic revision of the REA; Meliniomyces and Rhizoscyphus are reduced to synonymy under Hyaloscypha. Pseudaegerita, typified by P. corticalis, an asexual morph of H. spiralis which is a core member of Hyaloscypha, is also transferred to the synonymy of the latter genus. Hyaloscypha melinii is introduced as a new root-symbiotic species from Central Europe. Cadophora finlandica and C. paucisporum are confirmed conspecific, and four new combinations in Hyaloscypha are proposed. Based on phylogenetic analyses, some sexually reproducing species can be attributed to their asexual counterparts for the first time whereas the majority is so far known only in the sexual or asexual state. Hyaloscypha bicolor sporulating in vitro is reported for the first time. Surprisingly, the mycological and mycorrhizal sides of the same coin have never been formally associated, mainly because the sexual and asexual morphs of these fungi have been studied in isolation by different research communities. Evaluating all these aspects allowed us to stabilize the taxonomy of a widespread and ecologically well-studied group of root-associated fungi and to link their various life-styles including saprobes, bryophilous fungi, root endophytes as well as fungi forming ericoid mycorrhizae and ectomycorrhizae.
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Affiliation(s)
- J. Fehrer
- Institute of Botany, Czech Academy of Sciences, 252 43 Průhonice, Czech Republic
| | - M. Réblová
- Institute of Botany, Czech Academy of Sciences, 252 43 Průhonice, Czech Republic
| | - V. Bambasová
- Institute of Botany, Czech Academy of Sciences, 252 43 Průhonice, Czech Republic
| | - M. Vohník
- Institute of Botany, Czech Academy of Sciences, 252 43 Průhonice, Czech Republic
- Department of Plant Experimental Biology, Faculty of Science, Charles University, 128 44 Prague, Czech Republic
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7
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The endangered Florida pondweed (Potamogeton floridanus) is a hybrid: Why we need to understand biodiversity thoroughly. PLoS One 2018; 13:e0195241. [PMID: 29608584 PMCID: PMC5880373 DOI: 10.1371/journal.pone.0195241] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 03/19/2018] [Indexed: 11/19/2022] Open
Abstract
Thorough understanding of biodiversity is a fundamental prerequisite for biological research. A lack of taxonomic knowledge and species misidentifications are particularly critical for conservation. Here we present an example of Potamogeton floridanus, the Florida Pondweed, an endangered taxon endemic to a small area in the Florida panhandle, whose taxonomic status remained controversial for more than a century, and all previous attempts to elucidate its identity have failed. We applied molecular approaches to tackle the origin of the mysterious taxon and supplemented them with morphological and anatomical investigations of both historical herbarium collections and plants recently collected in the type area for a comprehensive taxonomic reassessment. Sequencing of two nuclear ribosomal markers and one chloroplast non-coding spacer resulted in the surprising discovery that P. floridanus is a hybrid of P. pulcher and P. oakesianus, with the former being the maternal parent. The hybrid colony is currently geographically isolated from the distribution range of P. oakesianus. We show that previous molecular analyses have failed to reveal its hybrid identity due to inadequate nuclear DNA sequence editing. This is an example how the uncritical use of automized sequence reads can hamper molecular species identifications and also affect phylogenetic tree construction and interpretation. This unique hybrid taxon, P. ×floridanus, adds another case study to the debate on hybrid protection; consequences for its conservation are discussed.
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8
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Authentication of Iceland Moss (Cetraria islandica) by UPLC-QToF-MS chemical profiling and DNA barcoding. Food Chem 2018; 245:989-996. [DOI: 10.1016/j.foodchem.2017.11.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Revised: 10/11/2017] [Accepted: 11/18/2017] [Indexed: 11/21/2022]
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9
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Muggia L, Mancinelli R, Tønsberg T, Jablonska A, Kukwa M, Palice Z. Molecular analyses uncover the phylogenetic placement of the lichenized hyphomycetous genus Cheiromycina. Mycologia 2017; 109:588-600. [PMID: 29211626 PMCID: PMC5769673 DOI: 10.1080/00275514.2017.1397476] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 10/24/2017] [Indexed: 10/31/2022]
Abstract
The genus Cheiromycina is one of the few genera of lichenized hyphomycetes for which no sexual reproductive stages have been observed. The genus includes species from boreal to temperate regions of the Northern Hemisphere where it is found growing on bark or wood. Congeners in Cheiromycina are characterized by a noncorticate thallus, nearly immersed in the substrate and presenting powdery unpigmented sporodochia, and containing chlorococcoid photobionts. The relationships of members of Cheiromycina with other fungi are not known. Here we inferred the phylogenetic placement of Cheiromycina using three loci (nuSSU, nuLSU, and mtSSU) representing C. flabelliformis, the type species for the genus, C. petri, and C. reimeri. Our results revealed that the genus Cheiromycina is found within the family Malmideaceae (Lecanorales) where members formed a monophyletic clade sister to the genera Savoronala and Malmidea. This phylogenetic placement and the relationships of Cheiromycina with other lichenized hyphomycetous taxa are here discussed.
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Affiliation(s)
- Lucia Muggia
- Department of Life Sciences, University of Trieste, via Giorgieri 10, 34127Trieste, Italy
| | - Riccardo Mancinelli
- Department of Life Sciences, University of Trieste, via Giorgieri 10, 34127Trieste, Italy
- Institute of Environmental Sciences CML, Leiden University, Einsteinweg 2, 2333 CC, Leiden, The Netherlands
| | - Tor Tønsberg
- Department of Natural History, University Museum, University of Bergen, Allegt. 41, 7800, N-5020Bergen, Norway
| | - Agnieszka Jablonska
- Department of Plant Taxonomy and Nature Conservation, University of Gdańsk, Wita Stwosza 59, 80-308Gdańsk, Poland
| | - Martin Kukwa
- Department of Plant Taxonomy and Nature Conservation, University of Gdańsk, Wita Stwosza 59, 80-308Gdańsk, Poland
| | - Zdeněk Palice
- Institute of Botany, Academy of Science of Czech Republic, Zámek 1, CZ-25243Průhonice, Czech Republic
- Department of Botany, Faculty of Natural Sciences, Charles University, Benátská 2, CZ-12801Praha, Czech Republic
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10
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Lendemer JC, Hodkinson BP. A radical shift in the taxonomy of Lepraria s.l.: Molecular and morphological studies shed new light on the evolution of asexuality and lichen growth form diversification. Mycologia 2017; 105:994-1018. [DOI: 10.3852/12-338] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- James C. Lendemer
- Institute of Systematic Botany, New York Botanical Garden, Bronx, New York 10458-5126
| | - Brendan P. Hodkinson
- International Plant Science Center, New York Botanical Garden, Bronx, New York 10458-5126
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11
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Cornejo C, Scheidegger C. Multi-gene phylogeny of the genus Lobaria: Evidence of species-pair and allopatric cryptic speciation in East Asia. AMERICAN JOURNAL OF BOTANY 2015; 102:2058-2073. [PMID: 26672013 DOI: 10.3732/ajb.1500207] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/08/2015] [Accepted: 10/13/2015] [Indexed: 06/05/2023]
Abstract
PREMISE OF THE STUDY Accurate species delimitation has critical implications for ecological and conservation studies. The lichen genus Lobaria is widely distributed in old-growth forests. Particularly in East Asia, this genus includes many rare and poorly known taxa that are circumscribed as morpho- or chemospecies, as well as species-pairs. METHODS To critically examine the relationships between species identified via morphological and chemical criteria, phylogenetic species recognition (PSR) was applied to the genus Lobaria. Morphological and chemical patterns of 87 individuals were examined and three independent nuclear loci were sequenced. The East Asian L. meridionalis-group was additionally studied using split decomposition and haplotype network analysis. KEY RESULTS The genus Lobaria and most of its species were strongly supported statistically. Split decomposition and haplotype networks suggest complex evolutionary histories of species within the East Asian L. meridionalis-group. CONCLUSIONS Phylogenetic analyses confirmed the monophyly of the genus Lobaria, including L. anomala. Within Lobaria, three major clades were found. These clades associate with different photobionts and comprise 18 known species and 5 undescribed species. Several chemical compounds were found to be neither stable nor invariant characters. Some taxa of the L. meridionalis-group appear to be monophyletic but remain as allopatric cryptic species. In three clades, this study found evidence for diversification processes between isidiate and nonisidiate specimens (species-pair). These findings are discussed in the context of evolutionary hypotheses for speciation processes.
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Affiliation(s)
- Carolina Cornejo
- Swiss Federal Research Institute WSL, Zuercherstrasse 111, 8903 Birmensdorf, Switzerland
| | - Christoph Scheidegger
- Swiss Federal Research Institute WSL, Zuercherstrasse 111, 8903 Birmensdorf, Switzerland
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12
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Truong C, Divakar PK, Yahr R, Crespo A, Clerc P. Testing the use of ITS rDNA and protein-coding genes in the generic and species delimitation of the lichen genus Usnea (Parmeliaceae, Ascomycota). Mol Phylogenet Evol 2013; 68:357-72. [DOI: 10.1016/j.ympev.2013.04.005] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 02/01/2013] [Accepted: 04/02/2013] [Indexed: 12/31/2022]
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Peksa O, Skaloud P. Do photobionts influence the ecology of lichens? A case study of environmental preferences in symbiotic green alga Asterochloris (Trebouxiophyceae). Mol Ecol 2011; 20:3936-48. [PMID: 21699598 DOI: 10.1111/j.1365-294x.2011.05168.x] [Citation(s) in RCA: 105] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The distribution patterns of symbiotic algae are thought to be conferred mainly by their hosts, however, they may originate in algal environmental requirements as well. In lichens, predominantly terrestrial associations of fungi with algae or cyanobacteria, the ecological preferences of photobionts have not been directly studied so far. Here, we examine the putative environmental requirements in lichenized alga Asterochloris, and search for the existence of ecological guilds in Asterochloris-associating lichens. Therefore, the presence of phylogenetic signal in several environmental traits was tested. Phylogenetic analysis based on the concatenated set of internal transcribed spacer rDNA and actin type I intron sequences from photobionts associated with lichens of the genera Lepraria and Stereocaulon (Stereocaulaceae, Ascomycota) revealed 13 moderately to well-resolved clades. Photobionts from particular algal clades were found to be associated with taxonomically different, but ecologically similar lichens. The rain and sun exposure were the most significant environmental factor, clearly distinguishing the Asterochloris lineages. The photobionts from ombrophobic and ombrophilic lichens were clustered in completely distinct clades. Moreover, two photobiont taxa were obviously differentiated based on their substrate and climatic preferences. Our study, thus reveals that the photobiont, generally the subsidiary member of the symbiotic lichen association, could exhibit clear preferences for environmental factors. These algal preferences may limit the ecological niches available to lichens and lead to the existence of specific lichen guilds.
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Affiliation(s)
- Ondřej Peksa
- The West Bohemian Museum in Pilsen, Kopeckého sady 2, CZ-30100 Plzeň, Czech Republic.
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Spribille T, Klug B, Mayrhofer H. A phylogenetic analysis of the boreal lichen Mycoblastus sanguinarius (Mycoblastaceae, lichenized Ascomycota) reveals cryptic clades correlated with fatty acid profiles. Mol Phylogenet Evol 2011; 59:603-14. [PMID: 21443957 PMCID: PMC3093615 DOI: 10.1016/j.ympev.2011.03.021] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 12/24/2010] [Accepted: 03/17/2011] [Indexed: 11/02/2022]
Abstract
Lichens are a prominent feature of northern conifer forests and a large number of species are thought to be circumboreal. Whether or not circumboreal lichen species really constitute monophyletic groups has seldom been tested. We investigated molecular phylogenetic patterns in the mycobiont of Mycoblastus sanguinarius, a well known epiphytic lichen species of the boreal forest, based on material collected from across the high latitude northern hemisphere. A three-locus dataset of internal transcribed spacer rDNA, translation elongation factor 1-α and replication licensing factor Mcm7 DNA sequences revealed that material treated until now as belonging to M. sanguinarius does indeed form a monophyletic group within the genus and is distinct from a strongly supported Mycoblastus affinis. The M. sanguinarius complex appears closely related to the rare Mycoblastus glabrescens, which is currently known only from the Pacific Northwest and was rediscovered during the present study. However, within M. sanguinarius s.lat. in the northern hemisphere, two deeply divergent and morphologically coherent species can be recovered, one of which matches the southern hemisphere species Mycoblastus sanguinarioides and turns out to be widespread in North America and Asia, and one of which corresponds to M. sanguinarius s.str. Both M. sanguinarius and M. sanguinarioides exhibit additional low-level genetic differentiation into geographically structured clades, the most prominent of which are distributed in East Asia/eastern North America and western North America/Europe, respectively. Individuals from these lowest-level clades are morphologically indistinguishable but chemical analyses by thin layer chromatography revealed that each clade possesses its own fatty acid profile, suggesting that chemical differentiation precedes morphological differentiation and may be a precursor to speciation.
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Affiliation(s)
- Toby Spribille
- Institute of Plant Sciences, University of Graz, Holteigasse 6, A-8010 Graz, Austria.
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Abstract
This contribution provides a synopsis of the presentations and discussions during the SIG session on cryptic speciation in lichen-forming fungi held during IMC9. In several cases, a re-examination of morphology against the background of molecular phylogenetic evidence revealed, sometimes subtle, morphological and/or chemical characters, supporting the distinction of particular clades at species level. However, there are also examples of cryptic species in which no morphological characters could be identified to distinguish between lineages. Several cases were presented in which distinct lineages are correlated with biogeographical patterns. When and how to name cryptic species was debated, and the use of terms such as "complex" or "aggregate" commended where the taxa formed part of a single lineage.
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Affiliation(s)
- Ana Crespo
- Departamento de Biología Vegetal II,Facultad de Farmacia, Universidad Complutense de Madrid, E-28040 Madrid, Spain
| | - H. Thorsten Lumbsch
- Department of Botany, The Field Museum, 1400 South Lake Shore Drive, Chicago, Illinois 60605, USA
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Lichen Systematics: The Role of Morphological and Molecular Data to Reconstruct Phylogenetic Relationships. PROGRESS IN BOTANY 2010. [DOI: 10.1007/978-3-642-02167-1_10] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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17
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FUSELIER LINDA, DAVISON PAULG, CLEMENTS MARIAH, SHAW BLANKA, DEVOS NICOLAS, HEINRICHS JOCHEN, HENTSCHEL JÖRN, SABOVLJEVIC MARKO, SZÖVÉNYI PÉTER, SCHUETTE SCOTT, HOFBAUER WOLFGANG, SHAW AJONATHAN. Phylogeographic analyses reveal distinct lineages of the liverworts Metzgeria furcata (L.) Dumort. and Metzgeria conjugata Lindb. (Metzgeriaceae) in Europe and North America. Biol J Linn Soc Lond 2009. [DOI: 10.1111/j.1095-8312.2009.01319.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Notes on the lichen genus Lepraria from maritime (South Shetlands) and continental (Schirmacher and Bunger Oases) Antarctica. Polar Biol 2009. [DOI: 10.1007/s00300-009-0738-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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