Abstract
The ultrastructural characteristics of the ascus apical apparatus of Encoelia furfuracea are described by means of transmission electron microscopy. The structure of its ascus apex is considerably different from that of E. tiliacea and E. fimbriata, and from other members of Helotiales in which these structures have been studied. Remarkable interspecific differences in the ascus apical apparatus provide additional data indicating heterogeneity of the genus.
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References
Andrew M, Barua R, Short SM, Kohn LM (2012) Evidence for a common toolbox based on necrotrophy in a fungal lineage spanning necrotrophs, biotrophs, endophytes, host generalists and specialists. PLoS ONE 7(1):e29943. doi:10.1371/journal.pone.0029943
Baral HO (1987) Der Apikalapparat der Helotiales. Eine lichtmicroskopische Studie über Arten mit Amyloidring. Z Mykol 53:119–136
Baral HO, Richter U (1997) Encoelia siparia im Naturschutzgebiet Kollenbeyer Holz, mit Anmerkungen zu nahestehenden Encoelia-Arten. Boletus 21(1):39–47
Bellemere A (1977) L’appareil apical de l’asque chez quelques Discomycetes: Étude ultrastructurale comparative. Rev Mycol 41:233–263
Corlett M, Elliott ME (1974) The ascus apex of Ciboria acerina. Can J Bot 52:1459–1463
Curry KJ, Kimbrough JW (1983) Septal structures in apothecial tissues of the Pezizaceae (Pezizales, Ascomycetes). Mycologia 75:781–794
Holst-Jensen A, Kohn LM, Schumacher T (1997) Nuclear rDNA phylogeny of the Sclerotiniaceae. Mycologia 89:885–899
Iturriaga T (1994) Discomycetes of the Guayanas. I. Introduction and some Encoelia species. Mycotaxon 51:271–288
Juzwik J, Hinds TE (1984) Ascospore germination, mycelial growth, and microconidial anamorphs of Encoelia pruinosa in culture. Can J Bot 62:1916–1919
Leenurm K, Raitviir A, Raid R (2000) Studies on the ultrastructure of Lachnum and related genera (Hyaloscyphaceae, Helotiales, Ascomycetes). Sydowia 52:20–45
Lohmeyer TR (1995) Pilze auf Helgoland. Zur Mycologie einer Ferieninsel in der Nordsee. 1. Ascomyceten. Mit Beiträgen von Hans Otto Baral und Erich Jahn. Z Mykol 61:79–121
Lumbsch HT, Huhndorf S (2010) http://www.fieldmuseum.org/sites/default/files/Fieldiana_2010_Myconet.pdf
Meyer SLF, Luttrell ES (1986) Ascoma morphology of Pseudopeziza trifolii forma specialis medicaginis-sativae (Dermateaceae) on alfalfa. Mycologia 78:529–542
Pärtel K, Raitviir A (2005) The ultrastructure of the ascus apical apparatus of some Dermateaceae (Helotiales). Mycol Prog 42:149–159
Peterson KR, Pfister DH (2010) Phylogeny of Cyttaria inferred from nuclear and mitochondrial sequence and morphological data. Mycologia 102:1398–1416. doi:10.3852/10-046
Samuelson DA, Kimbrough JW (1978) Asci of the Pezizales. V. The apical apparatus of Trichobolus zukalii. Mycologia 70:1191–1200
Spooner BM, Candoussau F (1988) Bambusicolous fungi from Soutwest of France III. A new species of Encoelia. Trans Mycol Soc Jpn 29:219–223
Spooner BM, Trigaux G (1985) A new Encoelia (Helotiales) from Prunus spinosa in France. Trans Br Mycol Soc 85(3):547–552
Torkelsen A-E, Eckblad F-E (1977) Encoelioideae (Ascomycetes) of Norway. Nor J Bot 24:133–149
Verkley GJM (1992) Ultrastucture of the ascus apical apparatus in Ombrophila violacea, Neobulgaria pura and Bulgaria inquinans (Leotiales). Persoonia 15:3–22
Verkley GJM (1993a) Ultrastructure of the ascus apical apparatus in ten species of Sclerotiniaceae. Mycol Res 97:179–194
Verkley GJM (1993b) Ultrastructure of the ascus apical apparatus in Hymenoscyphus and other genera of the Hymenoscyphoideae (Leotiales, Ascomycotina). Persoonia 15:303–340
Verkley GJM (1995a) Ultrastructure of the ascus apical apparatus in species Cenangium, Encoelia, Claussenomyces and Ascocoryne. Mycol Res 99:187–199
Verkley GJM (1995b) The ascus apical apparatus in Leotiales: an evaluation of ultrastructural characters as phylogenetic markers in the families Sclerotiniaceae, Leotiaceae, and Geoglossaceae. Dissertation. Rijksherbarium Leiden
Verkley GJM (2003) Ultrastructure of the ascus apical apparatus and ascospore wall in Ombrophila hemiamyloidea (Helotiales, Ascomycota). Nova Hedwigia 77:271–285
Wong S-W, Hyde KD, Jones EBG, Moss ST (1999) Ultrastructural studies on the aquatic ascomycetes Annulatascus velatisporus and A. triseptatus sp.nov. Mycol Res 103:561–571
Zhuang W-Y, Yu W-P, Langue C, Fouret N (2000) Preliminary notes on phylogenetic relationshiops in the Encoelioideae inferred from 18s rDNA sequences. Mycosystema 19(4):478–484
Acknowledgments
I am indebted to the late Ain Raitviir (1938–2006, Tartu, Estonia) who initiated this study. I thank the staff of the Laboratory of Developmental Biology, University of Tartu, for providing the technical assistance. The staff of the Unit of Electron Microscopy in Helsinki Biocenter (University of Helsinki, Institute of Biotechnology) helped in using the transmission electron microscope at their lab. Hans Otto Baral, Aleksandr Ordynets and Curator of M are acknowledged for sending specimens. Gerard J. M. Verkley and Kadri Põldmaa are acknowledged for their valuable comments to the manuscript. The study was financially supported by the European Union through the European Regional Development Fund (Centre of Excellence FIBIR) and by scholarship of Centre for International Mobility from the funds of Baltia 75 to K. Pärtel.
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Pärtel, K. Ultrastructure of the ascus apical apparatus of Encoelia furfuracea (Helotiales). Mycol Progress 13, 982 (2014). https://doi.org/10.1007/s11557-014-0982-2
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DOI: https://doi.org/10.1007/s11557-014-0982-2