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1.
We isolated five yeasts related to Candida mesenterica from the digestive tract, frass, and habitat of beetles in six families inhabiting basidiocarps. Based on rDNA sequence comparisons and phenotypic characters, the yeasts were identified as Kodamaea ohmeri and four undescribed taxa. Phylogenetic analysis of combined small and large subunit ribosomal DNA sequences placed the five taxa in a statistically well supported clade with C. mesenterica, Candida suecica and other yeast species known from basidiocarps, including 'Endomyces scopularum' (CBS154.92 and 155.92), Candida fukazawae, Candida fungicola and Candida sagamina. Only one of the new taxa produced ascospores; the other three reproduced only asexually. The yeasts appear to be less closely associated with beetles than with the beetle habitat. The new species and their type strains are Kodamaea laetipori (type strain NRRL Y-27713 T), Candida derodonti (type strain NRRL Y-2771 1 T), Candida arcana (type strain NRRL Y-27712 T) and Candida plutei (type strain NRRL Y-27715 T). 相似文献
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Nhu H. Nguyen Sung-Oui Suh Christopher J. Marshall Meredith Blackwell 《Mycological Research》2006,110(10):1232-1241
Ascomycete yeasts that both ferment and assimilate xylose were reported previously as associates of insects living in woody substrates. Most notable have been reports of Pichia stipitis-like yeasts that are widely associated with the wood-boring beetle, Odontotaenius disjunctus (Coleoptera: Passalidae), in the eastern United States. Our continuing investigation of insect gut yeasts has lead to the discovery of two new xylose-fermenting yeasts that phylogenetic analysis places as sister taxa. The beetle hosts, O. disjunctus and Phrenapates bennetti (Coleoptera: Tenebrionidae), are similar in habitat and appearance, and the presence of similar gut yeasts is an additional common feature between them. Here we describe the new yeast genus Spathaspora, the type species S. passalidarum, and its sister taxon Candida jeffriesii and discuss their natural history, including a comparison with Pichia stipitis, another member of a guild of xylose-fermenting yeasts with similar metabolic traits. In addition a morphologically distinct yeast ascospore type is described for Spathaspora. 相似文献
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Three ascosporogenous yeast strains were isolated from the gut of the passalid beetle, Odontotaenius disjunctus, inhabiting on rotten oak trees. DNA sequence comparison and other taxonomic characteristics identified the strains as a
novel species in the genus Kazachstania. The name Kazachstania
intestinalis sp. nov. (type strain EH085T = ATCC MYA-4658T = CBS 11839T) is proposed for the strains. The yeast is homothallic, producing persistent asci with 1–4 spheroidal ascospores. Molecular
phylogeny from ribosomal RNA gene sequences placed this novel species on the basal lineage of a clade including Kazachstania lodderae, Kazachstania exigua, Kazachstania martiniae, and other related Kazachstania spp., but none of those species was a close sister to K.
intestinalis. 相似文献
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Suzuki M Suh SO Sugita T Nakase T 《The Journal of General and Applied Microbiology》1999,45(5):229-238
Phylogenetic relationships of 33 Candida species containing galactose in the cells were investigated by using 18S ribosomal DNA sequence analysis. Galactose-containing Candida species and galactose-containing species from nine ascomycetous genera were a heterogeneous assemblage. They were divided into three clusters (II, III, and IV) which were phylogenetically distant from cluster I, comprising 9 galactose-lacking Candida species, C. glabrata, C. holmii, C. krusei, C. tropicalis (the type species of Candida), C. albicans, C. viswanathii, C. maltosa, C. parapsilosis, C. guilliermondii, and C. lusitaniae, and 17 related ascomycetous yeasts. These three clusters were also phylogenetically distant from Schizosaccharomyces pombe, which contains galactomannan in its cell wall. Cluster II comprised C. magnoliae, C. vaccinii, C. apis, C. gropengiesseri, C. etchellsii, C. floricola, C. lactiscondensi, Wickerhamiella domercqiae, C. versatilis, C. azyma, C. vanderwaltii, C. pararugosa, C. sorbophila, C. spandovensis, C. galacta, C. ingens, C. incommunis, Yarrowia lipolytica, Galactomyces geotrichum, and Dipodascus albidus. Cluster III comprised C. tepae, C. antillancae and its synonym C. bondarzewiae, C. ancudensis, C. petrohuensis, C. santjacobensis, C. ciferrii (anamorph of Stephanoascus ciferrii), Arxula terrestris, C. castrensis, C. valdiviana, C. paludigena, C. blankii, C. salmanticensis, C. auringiensis, C. bertae, and its synonym C. bertae var. chiloensis, C. edax (anamorph of Stephanoascus smithiae), Arxula adeninivorans, and C. steatolytica (synonym of Zygoascus hellenicus). Cluster IV comprised C. cantarellii, C. vinaria, Dipodascopsis uninucleata, and Lipomyces lipofer. Two galactose-lacking and Q-8-forming species, C. stellata and Pichia pastoris, and 5 galactose-lacking and Q-9-forming species, C. apicola, C. bombi, C. bombicola, C. geochares, and C. insectalens, were included in Cluster II. Two galactose-lacking and Q-9-forming species, C. drimydis and C. chiropterorum, were included in Cluster III. 相似文献
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The 18S ribosomal RNA gene sequences of the basidiomycetous yeastsKondoa malvinella andRhodosporidium dacryoidum, and an anamorphic yeastSympodiomycopsis paphiopedili were determined. The 18S rRNA gene ofR. dacryodium IAM 13522 (ex type) revealed the presence of an intron-like region with a length of 404 nucleotides, which is presumably assigned to a group I intron. The phylogenetic tree, including 34 published reference sequences, was inferred from 1493 sites which could be unambiguously aligned. The molecular phylogeny, using the ascomycetes as an outgroup, divided the basidiomycetes into three major lineages. The first lineage was composed of the smut fungi (Ustilaginales), represented byUstilago maydis, U. hordei, andTilletia caries, includingS. paphiopedili. The second lineage included the type species of teliospore-forming yeast generaLeucosporidium, Rhodosporidium, andSporidiobolus, and the generaErythrobasidium andKondoa, both previously included in the Filobasidiaceae.Rhodosporidium dacryodium showed a close relationship withE. hasegawianum, which was backed by a high bootstrap support. The rust fungiCronartium ribicola andPeridermium harknessii were also included in this lineage. The last lineage was formed by the filobasidiaceous yeasts,Cystofilobasidium capitatum, Mrakia frigida, Filobasidium floriforme, andFilobasidiella neoformans, and the anamorphic yeastsBullera alba (the anamorph ofBulleromyces albus) andTrichosporon cutaneum. Members ofTremella and selected hymenomycetous genera were also included in this lineage.The nucleotide sequence data reported in this paper will appear in the GSDB, DDBJ, EMBL and NCBI nucleotide sequence databases with the following accession numbers D13459 (Rhodosporidium dacryodium), D13776 (Kondoa malvinella), and D14006 (Sympodiomycopsis paphiopedili). 相似文献
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Patricia Valente Teun Boekhout Melissa Fontes Landell Juliana Crestani Fernando Carlos Pagnocca Lara Dur?es Sette Michel Rodrigo Zambrano Passarini Carlos Augusto Rosa Luciana R. Brand?o Raphael S. Pimenta José Roberto Ribeiro Karina Marques Garcia Ching-Fu Lee Sung-Oui Suh Gábor Péter Dénes Dlauchy Jack W. Fell Gloria Scorzetti Bart Theelen Marilene H. Vainstein 《PloS one》2012,7(10)
Background
Independent surveys across the globe led to the proposal of a new basidiomycetous yeast genus within the Bulleromyces clade of the Tremellales, Bandoniozyma gen. nov., with seven new species.Methodology/Principal Findings
The species were characterized by multiple methods, including the analysis of D1/D2 and ITS nucleotide sequences, and morphological and physiological/biochemical traits. Most species can ferment glucose, which is an unusual trait among basidiomycetous yeasts.Conclusions/Significance
In this study we propose the new yeast genus Bandoniozyma, with seven species Bandoniozyma noutii sp. nov. (type species of genus; CBS 8364T = DBVPG 4489T), Bandoniozyma aquatica sp. nov. (UFMG-DH4.20T = CBS 12527T = ATCC MYA-4876T), Bandoniozyma complexa sp. nov. (CBS 11570T = ATCC MYA-4603T = MA28aT), Bandoniozyma fermentans sp. nov. (CBS 12399T = NU7M71T = BCRC 23267T), Bandoniozyma glucofermentans sp. nov. (CBS 10381T = NRRL Y-48076T = ATCC MYA-4760T = BG 02-7-15-015A-1-1T), Bandoniozyma tunnelae sp. nov. (CBS 8024T = DBVPG 7000T), and Bandoniozyma visegradensis sp. nov. (CBS 12505T = NRRL Y-48783T = NCAIM Y.01952T). 相似文献9.
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Yeasts similar to Candida kruisii were isolated repeatedly from the digestive tracts of basidioma-feeding beetles, especially nitidulids inhabiting and feeding on a variety of agarics in the southeastern USA and Barro Colorado Island, Panama. Based on the identical sequences of the D1/D2 domains of the LSU rRNA gene (rDNA) and host beetle information, the isolates were grouped into 19 genotypes which varied from C. kruisii by up to 38 nucleotide differences in the D1/D2 region. Phylogenetic analysis of rDNA sequences and phenotypic traits placed the isolates in C. kruisii and in nine undescribed taxa. The new species and type strains are designated as Candida pallodes (NRRL Y-27653T), C. tritomae (NRRL Y-27650T), C. panamensis (NRRL Y-27657T), C. lycoperdinae (NRRL Y-27658T), C. atbi (NRRL Y-27651T), C. barrocoloradensis (NRRL Y-27934T), C. aglyptinia (NRRL Y-27935T), C. stri (NRRL Y-48063T), and C. gatunensis (NRRL Y-48064T). A phylogeny based on analysis of a combined database of sequences of SSU and LSU rDNA and the ITS region showed that the nine new species formed a novel sister clade to C. kruisii that was strongly supported by bootstrap analysis. Candida pallodes, C. tritomae, C. panamensis, and C. lycoperdinae formed one subclade, while C. atbi, C. barrocoloradensis, C. aglyptinia, C. stri, and C. gatunensis formed a second distinct subclade within the larger clade. Candida pallodes and C. atbi showed a strong host specificity to beetle species in the genus Pallodes (Coleoptera: Nitidulidae) collected from a variety of agarics. On the other hand, C. panamensis, C. tritomae, and C. lycoperdinae were associated with several unrelated beetles in Erotylidae, Scarabaeidae, Tenebrionidae, and Curculionidae as well as Lycoperdina ferruginea (Nitidulidae). Candida pallodes, C. tritomae, C. lycoperdinae, and C. atbi have been isolated repeatedly in the USA, while the other five new species have been found only at Barro Colorado Island, Panama. 相似文献