title: Pichia cecembensis sp. nov. isolated from a papaya fruit (Carica papaya L., Caricaceae).
abstract: The ascogenous yeast YS16T was isolated from a decaying papaya fruit. Phenotypic traits such as multilateral budding, spheroidal or elongate shape, pseudohyphae formation, asci with one or more ascospores, ability to ferment d-glucose, inability to assimilate nitrate and the presence of Q7 ubiquinone suggest its affiliation to the genus Pichia. The nearest phylogenetic neighbor, based on D1/D2 domain sequence of the 26S rRNA gene and ITS region sequence, was identified as Issatchenkia orientalis (NRRL Y-5396T, a synonym of Pichia kudriavzevii) with similarities of 98.2% and 97% respectively. In addition to the difference in the D1/D2 and ITS region sequence, YS16T differs from I. orientalis with respect to a number of phenotypic traits. However, in the phylogenetic analysis, YS16T showed close relatedness to the P. membranifaciens clade. Thus, it is proposed to assign the status of a new species to YS16T, for which the name P. cecembensis sp. nov. is proposed. The type strain of P. cecembensis sp. nov. is YS16T (=NRRL Y-27985T=JCM 13873T=CBS 10445T).
authors.affiliation: Centre for Cellular and Molecular Biology, Hyderabad, India.
authors.forename: Bhaskar
authors.initials: B
authors.lastname: Bhadra
authors.forename: R
authors.initials: R
authors.lastname: Sreenivas Rao
authors.forename: N
authors.initials: N
authors.lastname: Naveen Kumar
authors.forename: Preeti
authors.initials: P
authors.lastname: Chaturvedi
authors.forename: Partha K
authors.initials: PK
authors.lastname: Sarkar
authors.forename: S
authors.initials: S
authors.lastname: Shivaji
mesh_terms: D029441:Carica / Q000382:microbiology*; D004271:DNA, Fungal / Q000235:genetics; D021903:DNA, Ribosomal Spacer / Q000378:metabolism; D007194:India; D008969:Molecular Sequence Data; D016533:Mycological Typing Techniques; D010802:Phylogeny; D010843:Pichia / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D012335:RNA, Ribosomal / Q000235:genetics
chemical_list: D004271:DNA, Fungal; D021903:DNA, Ribosomal Spacer; D012335:RNA, Ribosomal; C065096:RNA, ribosomal, 26S