Metschnikowia noctiluminum sp. nov., Metschnikowia corniflorae sp. nov., and Candida chrysomelidarum sp. nov., isolated from green lacewings and beetles |
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| Institution: | 1. Centre for African Ecology, School of Animal, Plant and Environmental Sciences, University of the Witwatersrand, Private Bag 3, Wits 2050, Johannesburg, South Africa;2. Centre for Wildlife Management, University of Pretoria, Pretoria, South Africa;3. Mammal Research Institute, Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa;1. Institute of Science and Engineering, Kanazawa University, Kakuma-machi, Kanazawa, Ishikawa 920-1192, Japan;2. Graduate School of Informatics, Kyoto University, Yoshida-honmachi, Sakyo-ku, Kyoto 606-8501, Japan;3. National Institute of Polar Research and SOKENDAI (The Graduate University for Advanced Studies), 10-3, Midori-cho, Tachikawa, Tokyo 190-8518, Japan;4. The University of Shiga Prefecture, 2500, Hassaka-cho, Hikone, Shiga 522-8533, Japan;1. KU Leuven, Department of Microbial and Molecular Systems (M2S), Laboratory for Process Microbial Ecology and Bioinspirational Management (PME&BIM), Campus De Nayer, B-2860 Sint-Katelijne-Waver, Belgium;2. Department of Biology, Stanford University, Stanford, CA 94305, USA;1. Faculty of Engineering, University Campus Bio-Medico of Rome, via Alvaro del Portillo 21, 00128 Rome, Italy;2. CNR-ITM, c/o University of Calabria, Via Pietro Bucci, Cubo 17/C, Rende, 87030 CS, Italy;3. Department of Chemical and Materials Engineering, University of Calabria, Via P.Bucci, Cubo 44a, Rende, 87036 CS, Italy;4. Department of Chemical Engineering, Jadavpur University, Raja S.C Mullick Road, Kolkata, 700032 West Bengal, India;1. Department of Medical Genetics, Zunyi Medical University, Zunyi, China;2. School of Life Sciences, Datong University, Datong, China;3. College of Life Sciences, Jiangsu Normal University, Xuzhou, China |
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| Abstract: | Fourteen yeast isolates belonging to the Metschnikowia clade were isolated from the digestive tracts of lacewings (Neuroptera: Chrysopidae), soldier beetles and leaf beetles (Coleoptera: Cantharidae and Chrysomelidae), and a caddisfly (Trichoptera: Hydropsychidae). The insect hosts were associated with sugary substances of plants, a typical habitat for yeasts in this clade. Based on DNA sequence comparisons and phenetic characters, the yeasts were identified as Candida picachoensis, Candida pimensis, and four undescribed taxa. Among the undescribed taxa, three yeasts were distinguished from one another and from other described taxa by nucleotide differences in the ribosomal DNA repeat, which were sufficient to consider them as new species. Two of the novel yeast species are described as Metschnikowia noctiluminum (NRRL Y-27753T) and M. corniflorae spp. nov. (NRRL Y-27750T) based in part on production of needle-shaped ascospores, which are found in most Metschnikowia species. Sexual reproduction was not observed in the third new yeast, Candida chrysomelidarum sp. nov. (NRRL Y-27749T). A fourth isolate, NRRL Y-27752, was not significantly distinct from Metschnikowia viticola and Candida kofuensis to be described as a new species. Phylogenetic analysis of the D1/D2 loop sequences placed M. noctiluminum within the M. viticola clade, while C. chrysomelidarum was a sister taxon of Candida rancensis. Metschnikowia corniflorae was phylogenetically distinct from other new species and fell outside of the large-spored Metschnikowia group. |
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