Neža Čadež (Author), Nicolas Bellora (Author), Ricardo Ulloa (Author), Miha Tome (Author), Hrvoje Petković (Author), Marizeth Groenewald (Author), Chris Todd Hittinger (Author), Diego Libkind (Author)

Abstract

During a survey of Nothofagus trees and their parasitic fungi in Andean Patagonia (Argentina), genetically distinct strains of Hanseniaspora were obtained from the sugar-containing stromata of parasitic Cyttaria spp. Phylogenetic analyses based on the single-gene sequences (encoding rRNA and actin) or on conserved, single-copy, orthologous genes from genome sequence assemblies revealed that these strains represent a new species closely related to Hanseniaspora valbyensis. Additionally, delimitation of this novel species was supported by genetic distance calculations using overall genome relatedness indices (OGRI) between the novel taxon and its closest relatives. To better understand the mode of speciation in Hanseniaspora, we examined genes that were retained or lost in the novel species in comparison to its closest relatives. These analyses show that, during diversification, this novel species and its closest relatives, H. valbyensis and Hanseniaspora jakobsenii, lost mitochondrial and other genes involved in the generation of precursor metabolites and energy, which could explain their slower growth and higher ethanol yields under aerobic conditions. Similarly, Hanseniaspora mollemarum lost the ability to sporulate, along with genes that are involved in meiosis and mating. Based on these findings, a formal description of the novel yeast species Hanseniaspora smithiae sp. nov. is proposed, with CRUB 1602$^H$ as the holotype.

Keywords

kvasovke;Hanseniaspora;taksonomija;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL BF - Biotechnical Faculty
UDC: 579.8:582.282.23
COBISS: 72059139 Link will open in a new window
ISSN: 1664-302X
Views: 334
Downloads: 247
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Other data

Secondary language: Slovenian
Secondary keywords: kvasovke;Hanseniaspora;taksonomija;
Type (COBISS): Article
Pages: str. 1-11
Issue: ǂVol. ǂ12
Chronology: Jul. 2021
DOI: 10.3389/fmicb.2021.679894
ID: 14119263