Metschnikowia agaveae sp.nov., a heterothallic haploid yeast from blue agave

Several strains of a new haploid, heterothallic species of Metschnikowia have been isolated from Agave tequilana var. azul in two agave-growing localities of Jalisco, Mexico. The new yeast species forms two aciculate ascospores per ascus after conjugation of enlarged and elongated compatible cells. Named after its host, Metschnikowia agaveae resembles superficially Metschnikowia hawaiiensis, but differs from the latter by some physiological and morphological characteristics. These two species exhibited no signs of sexual cross-reactivity. Strain UWO(PS)92-207.1 (h+, CBS 7744, ATCC 90148) is the type culture, and strain UWO(PS)92-210.1 (h−, CBS 7745, ATCC 90147) has been designated as isotype.Key words: agave, yeast, Metschnikowia, new species.

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Description of four Apiotrichum and two Cutaneotrichosporon species isolated from guano samples from bat-inhabited caves in Japan

INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY ◽

10.1099/ijsem.0.004277 ◽

2020 ◽

Vol 70 (8) ◽

pp. 4458-4469

Author(s):

Masako Takashima ◽

Sanae Kurakado ◽

Otomi Cho ◽

Ken Kikuchi ◽

Junta Sugiyama ◽

...

Keyword(s):

New Species ◽

Yeast Species ◽

Large Subunit ◽

Biochemical Properties ◽

Rrna Genes ◽

New Yeast Species ◽

Rrna Gene ◽

D2 Domain ◽

Lsu Rrna ◽

New Yeast

Four new yeast species belonging to the genus Apiotrichum and two new yeast species belonging to Cutaneotrichosporon are described for strains isolated from guano samples from bat-inhabited caves in Japan. In 2005, we reported these isolates as Trichosporon species based on sequence analyses of the D1/D2 domain of large subunit (LSU) rRNA genes according to available basidiomycetous yeast classification criteria; however, to date, they have not been officially published as new species with descriptions. Their phylogenetic positions have been reanalysed based on comparison of internal transcribed spacer (ITS) region sequences (including the 5.8S rRNA gene) and the D1/D2 domain of the LSU rRNA gene with those of known species; we confirmed clear separation from previously described species. Physiological and biochemical properties of the isolates also suggest their distinctiveness. Therefore, we describe Apiotrichum akiyoshidainum (holotype JCM 12595T), Apiotrichum chiropterorum (JCM 12594T), Apiotrichum coprophilum (JCM 12596T), Apiotrichum otae (JCM 12593T), Cutaneotrichosporon cavernicola (JCM 12590T) and Cutaneotrichosporon middelhovenii (JCM 12592T) as new species. C. cavernicola showed particularly distinctive morphology including large inflated anomalous cells on the hyphae and germination from the cells, although clear clamp connections on the hyphae were not confirmed. Further study is needed to elucidate the morph of this species.

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Torulopsis pampelonensis sp. nov. A new species of yeast isolated from beech forest soil

Canadian Journal of Microbiology ◽

10.1139/m78-071 ◽

1978 ◽

Vol 24 (4) ◽

pp. 433-435 ◽

Cited By ~ 3

Author(s):

C. Ramirez ◽

A. T. Martinez

Keyword(s):

New Species ◽

Forest Soil ◽

Yeast Species ◽

Beech Forest ◽

New Yeast Species ◽

Fagus Silvatica ◽

Fallen Leaves ◽

New Yeast ◽

A New Species

A new yeast species, Torulopsis pampelonensis is described. Six strains were recovered from a gleyic Andosol under a beech forest and two other strains from the surface of fallen leaves of Fagus silvatica L. Although it showed some morphological and physiological similarities with Torulopsis tannotolerans Jacob and Torulopsis navarrensis Ramírez and Moriyón, it differed from all Torulopsis species presently known.

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BIODIVERSITY OF YEASTS ISOLATED FROM CON DAO ISLAND – BA RIA VUNG TAU

Vietnam Journal of Science and Technology ◽

10.15625/2525-2518/55/1a/12386 ◽

2018 ◽

Vol 55 (1A) ◽

pp. 99

Author(s):

Dao Thi Luong

Keyword(s):

New Species ◽

Yeast Species ◽

Candida Rugosa ◽

New Yeast Species ◽

Yeast Diversity ◽

26S Rdna ◽

Diverse Species ◽

Yeast Strains ◽

D2 Domain ◽

New Yeast

During the study on yeast diversity from natural samples in Viet Nam, we have collected 38 samples of flowers, fruits, leaves, litter and soils in Con Dao Island and isolated 54 yeast strains. They were identified based on morphology observation and sequences of D1/D2 domain of 26S rDNA. The results showed that they belonged to 13 genera, 28 species, of which 15 strains were suspected as 13 new species. Thirty-nine strains were identified as Ascomycetes belonging 7 genera, 11 species, and the fifteen remaining strains belonged to Basidomycetes, 6 genera and 13 species. The results also showed that four Ascomycetous and nine Basidomycetous isolated were suspected to be new species. The results also showed that Candida was the genus with highest number isolates- 26 strains, and half of these were Candida rugosa. The most diverse species in this study was found in Cryptococcus genus with 7 species from 8 isolates only, and all of them were suspected to be new species. This study also proved that the samples had differences in yeast diversity and species composition among them. Therefore, Con Dao Island is multi potential to discover and publish new yeast species in Vietnam.

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Sporopachydermia quercuum, a new yeast species found in exudates of Quercus rubra

Canadian Journal of Microbiology ◽

10.1139/m82-085 ◽

1982 ◽

Vol 28 (6) ◽

pp. 567-571 ◽

Cited By ~ 3

Author(s):

Marc-André Lachance

Keyword(s):

New Species ◽

Quercus Rubra ◽

Yeast Species ◽

Maximum Temperature ◽

New Yeast Species ◽

Red Oaks ◽

Lower Maximum ◽

New Yeast ◽

A New Species

A new species of Sporopachydermia Rodrigues de Miranda has been isolated from exudates of red oaks (Quercus rubra). Morphologically, it resembles S. cereana by producing curved cells. Physiologically, it is closer to S. lactativora. It differs from both species by its lower maximum temperature of growth. The epithet quercuum is proposed to indicate its origin.

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Metschnikowia lochheadii and Metschnikowia drosophilae, two new yeast species isolated from insects associated with flowers

Canadian Journal of Microbiology ◽

10.1139/w00-130 ◽

2001 ◽

Vol 47 (2) ◽

pp. 103-109 ◽

Cited By ~ 22

Author(s):

Marc-André Lachance ◽

Jane M Bowles ◽

Sabrina Kwon ◽

Gaëlle Marinoni ◽

William T Starmer ◽

...

Keyword(s):

Yeast Species ◽

Large Subunit ◽

Carbon Sources ◽

Morning Glory ◽

Sexual Cycle ◽

New Yeast Species ◽

Cayman Island ◽

Nutritional Profile ◽

Heterothallic Species ◽

New Yeast

Two new haplontic heterothallic species of Metschnikowia were isolated from floricolous insects and flowers. Metschnikowia lochheadii was recovered from insects found in various flowers on the Hawaiian Islands of Kauai and Maui, and from Conotelus sp. (Coleoptera: Nitidulidae) in northwestern Guanacaste Province, Costa Rica. The morphology, physiology, and sexual cycle are typical of the large-spored Metschnikowia species, and the partial ribosomal DNA large subunit (D1D2) sequences suggest that the new species is most closely related to Candida ipomoeae. Metschnikowia lochheadii is nearly indistinguishable from its ascogenous relatives and conjugates freely with Metschnikowia continentalis, forming sterile asci. It also exhibits asymmetric mating with Metschnikowia hawaiiensis. Metschnikowia drosophilae was found in morning glory (Ipomoea sp.) flowers and associated Drosophila bromeliae on Grand Cayman Island. Its nutritional profile is atypical of the genus, being the only species that does not utilize sucrose or maltose as carbon sources, and one of the few that does not utilize melezitose. D1D2 sequences show that Metschnikowia drosophilae is a sister species to Candida torresii, to which it bears considerable similarity in nutritional profile. The type cultures are: Metschnikowia lochheadii, strains UWO(PS)00-133.2 = CBS 8807 (h+, holotype) UWO(PS)99-661.1 = CBS 8808 (h, isotype); and Metschnikowia drosophilae, strains UWO(PS)83-1135.3 = CBS 8809 (h+, holotype) and UWO(PS)83-1143.1 = CBS 8810 (h, isotype).Key words: Metschnikowia lochheadii, Metschnikowia drosophilae, new yeast species, insects, flowers.

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