Nakazawaea atacamensis f.a., sp. nov. a novel non-conventional
fermentative ascomycetous yeast species from the Atacama Desert
Abstract
Atacama is the most hyper-arid Desert in the world. In this study, we
describe a novel species, Nakazawaea atacamensis f. a., sp. nov.,
isolated from plant samples in the Atacama Desert of Chile. In total,
three isolates of N. atacamensis were obtained from independent
Neltuma chilensis bark samples (synonym Prosopis chilensis,
Algarrobo). The novel species was delineated based on morphological,
physiological, biochemical, and molecular characteristics. A
neighbour-joining analysis using the sequences of the D1/D2 domains of
LSU rRNA revealed that N. atacamensis sp. nov. clustered with
Nakazawaea pomicola. The sequence of N. atacamensis
differed from closely related species by 1.3% to 5.2% in the D1/D2
domains. A phylogenomic analysis based on single nucleotide
polymorphism’s data confirms that the novel species belongs to the genus
Nakazawaea, and placed N. atacamensis closer to N.
peltata. Phenotypic comparisons demonstrated that N. atacamensis
sp. nov. exhibited distinct carbon assimilation patterns compared to its
related species. Genome sequencing of the ATA-11A-B T
strain revealed a genome size of approximately 12.4 Mbp, similar to
other Nakazawaea species, with 5,116 protein-coding genes
annotated using InterProScan. In addition, N. atacamensis
exhibited the capacity to ferment synthetic wine must, representing a
potential new yeast for mono or co-culture wine fermentations. This
comprehensive study expands our understanding of the genus
Nakazawaea and highlights the ecological and industrial potential
of these yeasts in fermentation processes. The holotype of N.
atacamensis sp. nov. is CBS 18375 T. The Mycobank
number is MB 849680.