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Bionectriaceae, Hypocreales), an Unusual Bamboo-Inhabiting Fungus Found in South America

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Bionectriaceae, Hypocreales), an Unusual Bamboo-Inhabiting Fungus Found in South America Biotemas, 31 (1): 1-9, março de 2018 http://dx.doi.org/10.5007/2175-7925.2018v31n1p11 ISSNe 2175-7925 Additional information on Mycocitrus aurantium (Bionectriaceae, Hypocreales), an unusual bamboo-inhabiting fungus found in South America Clarice Loguercio-Leite 1 Larissa Trierveiler-Pereira 1 Alice Gerlach 1 Marisa de Campos-Santana 1 Cecilia Cristina Carmarán 2,3 Andrea Irene Romero 2,3* 1 Laboratório de Micologia, Departamento de Botânica, Centro de Ciências Biológicas Universidade Federal de Santa Catarina Campus Universitário, Florianópolis, CEP 88040-900 – SC, Brasil 2 Departamento de Biodiversidad y Biología Experimental, Facultad de Ciencias Exactas y Naturales Universidad de Buenos Aires, Buenos Aires, Argentina 2 CONICET – Universidad de Buenos Aires, Instituto de Micología y Botánica (InMiBo) Buenos Aires, Argentina * Autor para correspondência [email protected] Submetido em 26/06/ 2017 Aceito para publicação em 07/02/2018 Resumo Informações adicionais sobre Mycocitrus aurantium (Bionectriaceae, Hypocreales), um fungo incomum encontrado na América do Sul. Mycocitrus Möller corresponde a um gênero tropical que contém duas espécies que formam grandes estromas em colmos de bambu. Durante um levantamento de macrofungos no estado de Santa Catarina foram coletados quatro espécimes de Mycocitrus aurantium Möller, uma espécie considerada rara por ter sido pouco citada na literatura. Os objetivos desse trabalho foram contribuir para o conhecimento sobre a morfologia da espécie, comunicar pela primeira vez a obtenção de cultura da espécie e discutir seu posicionamento filogenético com base em dados moleculares. Estudos morfológicos e filogenéticos foram conduzidos a partir de espécimes frescos e culturas. A filogenia apresentada foi construída com base na sequência do espaçador interno transcrito do DNA ribossomal (ITS). Atualmente, o gênero Mycocitrus é aceito na família Bionectriaceae (Hypocreales); entretanto, este posicionamento não se sustenta quando apenas os caracteres morfológicos são levados em consideração. Palavras-chave: Ascomycetes; Fungos neotropicais; ITS; Taxonomia de fungos Revista Biotemas, 31 (1), março de 2018 2 C. Loguercio-Leite et al. Abstract Mycocitrus Möller is a tropical genus that comprises two species, which form large orange stromata on bamboo culms. An ongoing survey of macrofungi in Santa Catarina State, Brazil, has produced four collections of Mycocitrus aurantium Möller. This species is considered rare and few records of it are found in the literature. The goals of this work are to improve what is known about the morphology, report the first culture and discuss the phylogenetic position of M. aurantium. Morphological and phylogenetic studies were carried out using fresh specimens and cultures. A phylogeny was constructed based on sequences of the nuclear ribosomal internal transcribed spacer. Currently, Mycocitrus is placed in the Bionectriaceae (Hypocreales); however, its placement at the family level is unclear when considering morphological characters alone. Key words: Ascomycetes; Fungal taxonomy; ITS; Neotropical fungi Introduction Möller were very similar to those of Hypocrea Fr. and in fact Mycocitrus might be classified as a large Mycocitrus Möller was first described when it was Hypocrea.” Afterwards, Doi (1967) associated another found growing on culms of living bamboo (Guadua species of the genus, M. phyllostachydis, with the Kunth) and on Microstachys A. Juss. (Euphorbiaceae) in Hypocreaceae De Not. Rogerson (1970) followed the the city of Blumenau, Santa Catarina, in southern Brazil same placement in this family. However, Rossman (MÖLLER, 1901). et al. (1999) proposed a new family, Bionectriaceae Mycocitrus aurantium Möller, the type species, is Samuels & Rossman, which included Mycocitrus. At characterized by its large fleshy orange stromata that this time, they designated an epitype for M. aurantium, clasp and surround bamboo culms, with perithecial believing the type was destroyed, but later Rossman ascomata partially to fully immersed in the upper region (personal communication) found a piece of the type at of the stromata. Specimens of M. aurantium reported by the herbarium S. Maharachchikumbura et al. (2015) Rick (1907) were collected on a different bamboo genus followed Rossman’s proposal and placed the species in (Arundinaria Michx.) in a different region of southern Bionectriaceae. Brazil (the city of São Leopoldo, in the state of Rio Taking into account the scanty number of records Grande do Sul). Rick’s collections are kept at PACA, and information about this species, the goal of this BPI and FH. work is to improve what is known about the species by According to Molfino (1930), M. aurantium has providing new records, an anamorph description, ITS been reported for Argentina, where it was growing on sequences and SEM details of ascospore ornamentation. Chusquea ramosissima Lindm. in Puerto Delicia, along the shores of the Parana River in Misiones Province. He also mentioned that this species was found in Paraguay; Materials and Methods however, there is no herbarium voucher for this report. Collection sites and morphology Later, a second species, M. phyllostachydis (Syd. & P. Syd.) Yoshim. Doi (≡ Ustilaginoidea phyllostachydis During field trips to survey macrofungi in the Syd. & P. Syd.), was collected in Japan on Phyllostachys state of Santa Catarina, southern Brazil, stromata Siebold & Zucc. and added to the genus (DOI, 1967). of M. aurantium were collected on bamboo culms. Observations, digital images, drawings (with the aid of Mycocitrus is undoubtedly a member of the a camera lucida), and measurements of ascomata, asci Hypocreales. Möller (1901) placed the genus in and ascospores were made from material mounted in “Hypocreaceen, Didymosporae.” Lloyd (1916) agreed distilled water, 5% KOH and phloxine using a Zeiss with Möller’s proposal and stated: “the ascospores Axioskop microscope. To identify the species, Möller and perithecia from the specimen described by Revista Biotemas, 31 (1), março de 2018 Additional information on Mycocitrus aurantium 3 (1901) and Rossman et al. (1999) were consulted. Colors for Biotechnology Information) search was performed were coded according to Kornerup and Wascher (1978). to look for similar sequences. The culture was grown Voucher material is deposited at FLOR and BAFC on 0.1% MEA (w/v) and was incubated at 25°C for 21 (HOLMGREN et al., 1990). d in light/dark. Samples from stromata were frozen at -80°C for one week before extraction. Scanning electron microscopy (SEM) studies were conducted at the Centro de Microscopia, CCB/UFSC, DNA was extracted from hyphae using an Florianópolis, Brazil. Sections were removed from dried UltraCleanTM Microbial DNA Isolation Kit (MO BIO ascomata and dusted onto specimen holders that had Laboratories inc., Solana Beach, USA) according to double-sided carbon adhesive tape, which were then the instructions of the manufacturer. The ITS region coated with up to 20 nanometres of gold using an ion of the isolates was amplified using universal primers sputter coater. ITS1 and ITS4 (WHITE et al., 1990). In some cases, the best amplification results were achieved by adding An axenic culture was obtained from internal tissue 6% bovine serum albumin (BSA, Promega Corp.) to of the stroma and ascospores of the collection BAFC the PCR reaction mix. PCR products were purified 51760. A strain was transferred to MEA (KIRK et al., using a QIAGEN Gel Extraction Kit (QIAGEN Inc.). 2008) agar plates and incubated at 25°C in the dark. The Both strands of each fragment were sequenced by the strain is stored in the BAFC culture collection (BAFC Macrogen Service Center. Eutypa leptoplaca (Mont.) cult. 3843). Rappaz and Xylaria curta Fr. were chosen as outgroups. Phylogenetic analyses For static homology analyses, the BioEdit sequence alignment editor, version 7.0.5.3 (HALL, To perform the phylogenetic analyses a total of 40 1999), was used to manipulate the sequences. The sequences were used in the molecular analyses (38 from alignments were deposited in TreeBASE (Submission GenBank database), including 2 sequences obtained ID S21609). Two analyses were performed: Bayesian from stroma BAFC 51693 and strain BAFC cult. 3843 inference and maximum parsimony. Bayesian inference (Table 1). Previously, an NCBI BLAST (National Center was calculated with MrBayes v. 3.1.2 with a general TABLE 1: Taxa used in the phylogenetic analysis and the GenBank accession number of the DNA sequences (ITS). Taxon names are according to GenBank record. Taxon Accession number Acremonium persicinum (Nicot) W. Gams FN706554 Acremonium rutilum W. Gams AB540580 Ascopolyporus philodendrus J.F. Bisch. AY886545 Ascopolyporus polychrous Möller DQ118737 Aschersonia placenta Berk. JN049842 Beauveria caledonica Bissett & Widden HQ880820 Bionectria ochroleuca (Schwein.) Schroers & Samuels 1 GU256766 Bionectria ochroleuca (Schwein.) Schroers & Samuels 2 GQ302681 Bionectria ochroleuca (Schwein.) Schroers & Samuels 3 FJ478131 Bionectria pityrodes Schroers AY254158 Bionectria ralfsii (Berk. & Broome) Schroers & Samuels FJ025191 Claviceps fusiformis Loveless DQ522539 Cosmospora coccinea Rabenh. FJ474072 Cosmospora cupularis J. Luo & W.Y. Zhuang EF121864 Cosmospora episphaeria (Tode) Rossman & Samuels FJ474073 Cosmospora gigas J. Luo & W.Y. Zhuang EF121863 Revista Biotemas, 31 (1), março de 2018 4 C. Loguercio-Leite et al. Hydropisphaera bambusicola Lechat GU059594 Hydropisphaera erubescens (Roberge ex Desm.) Rossman & Samuels AF422977 Hydropisphaera fungicola
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