Knufia perfecta, a new black yeast from Iran, and a key to Knufia species

Mehrabi, Mehdi; Asgari, Bita; Hemmati, Roghayeh

doi:10.1127/nova_hedwigia/2017/0450

Cited by 5 publications

(2 citation statements)

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“…Knufia cryptophialidica is so named for the presence of phialides that are absent in K. victoriae. Knufia victoriae does not produce a teleomorph, differently from K. perfecta , for which ana- and teleomorphic sporulation is known [28]. It also differs from K. perfecta in producing not anastomosing and less frequently branched hyphae.…”

Section: Description Of Knufia Victoriae Canini and Zucconi Sp Novmentioning

confidence: 99%

Knufia obscura sp. nov. and Knufia victoriae sp. nov., two new species from extreme environments

Isola

Prigione

Zucconi

et al. 2022

International Journal of Systematic and Evolutionary Microbiology

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Six strains of black meristematic fungi were isolated from Antarctic soils, gasoline car tanks and from the marine alga Flabellia petiolata. These fungi were characterized by morphological, physiological and phylogenetic analyses. According to the maximum-likelihood analysis reconstructed with ITS and LSU sequences, these strains belonged to the genus Knufia. Knufia obscura sp. nov. (holotype CBS 148926) and Knufia victoriae sp. nov. (holotype CBS 149015) are proposed as two novel species and descriptions of their morphological, physiological and phylogenetic features are presented. Based on the maximum-likelihood analyses, K. obscura was closely related to Knufia hypolithi (99 % bootstrap support), while K. victoriae clustered in the clade of Knufia cryptophialidica and Knufia perfecta (93 % bootstrap support). Knufia victoriae, recorded in Antarctic soil samples, had a psychrophilic behaviour, with optimal growth between 10 and 15 °C and no growth recorded at 20 °C. Knufia obscura, from a gasoline car tank and algae, displayed optimal growth between 20 and 25 °C and was more tolerant to salinity than K. victoriae.

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Section: Description Of Knufia Victoriae Canini and Zucconi Sp Novmentioning

confidence: 99%

Knufia obscura sp. nov. and Knufia victoriae sp. nov., two new species from extreme environments

Isola

Prigione

Zucconi

et al. 2022

International Journal of Systematic and Evolutionary Microbiology

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“…Therefore it can be as well an epiphyte of some aboriginal steppe plants, entering the soil late in the growing season with its litter. The same might be true for Knufia , as it was found as an epiphyte on tree bark or dead twigs [ 39 , 40 ]. With Rhinocladiella (of Ascomycota ) it is most likely another story, as this dominant genus was found to have notably increased abundance in the lower layer as compared with the upper 0–5 cm: as a representative of a genus was reported as a root endophyte [ 41 ], in our study it can be an endophyte of a plant species with deeper penetrating roots, which litter might have brought the fungus into the soil of the lower layers.…”

Section: Discussionmentioning

confidence: 94%

Soil Mycobiome Diversity under Different Tillage Practices in the South of West Siberia

Naumova

Barsukov

Батурина

et al. 2022

Life

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Managing soil biodiversity by reduced or no tillage is an increasingly popular approach. Soil mycobiome in Siberian agroecosystems has been scarcely studied; little is known about its changes due to tillage. We studied mycobiome in Chernozem under natural steppe vegetation and cropped for wheat by conventional or no tillage in a long-term field trial in West Siberia, Russia, by using ITS2 rDNA gene marker (Illumina MiSeq sequencing). Half of the identified OTUs were Ascomycota with 82% of the total number of sequence reads and showing, like other phyla (Basidiomycota, Zygomycota, Mortierellomycota, Chytridiomycota, Glomeromycota), field-related differential abundance. Several dominant genera (Mortierella, Chaetomium, Clonostachys, Gibberella, Fusarium, and Hypocrea) had increased abundance in both cropped soils as compared with the undisturbed one and therefore can be safely assumed to be associated with wheat residues. Fungal OTUs’ richness in cropped soils was less than in the undisturbed one; however, no tillage shifted soil mycobiome composition closer to the latter, albeit, it was still similar to the ploughed soil, despite different organic matter and wheat residue content. The study provided the first inventory of soil mycobiome under different tillage treatments in the south of West Siberia, where wheat production is an important section of the regional economy.

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Description of Allocanariomyces and Parachaetomium, two new genera, and Achaetomium aegilopis sp. nov. in the Chaetomiaceae

2020

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We describe Allocanariomyces tritici gen et sp. nov. and Achaetomium aegilopis sp. nov. as seed endophytes of wheat and its poaceous relatives in the west and northwestern provinces of Iran using morphological traits and sequences of ITS region, partial LSU rDNA, β-tubulin and the second largest subunit of DNA-directed RNA polymerase II genes. Chaetomium iranianum, C. truncatulum and C. carinthiacum are also combined here under the new genus, Parachaetomium. Allocanariomyces is differentiated from the closest genus, Canariomyces by having solitary, glabrous perithecia with walls of textura epidermoidea, stalked asci, densely granular-ornamented ascospores with a distinct subapical germ pore, and producing only solitary conidia. Parachaetomium has fusiform or navicular ascospores not bilaterally attened, compared to Chaetomium with limoniform to globose, bilaterally attened ascospores. Achaetomium aegilopis is mainly distinguished from A. strumarium, the closest relative, by possessing brown, often scattered perithecia, hyaline perithecial hairs covered with many hyaline crystals, hyaline chlamydospores, and lacking of the asexual morph.

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Knufia perfecta, a new black yeast from Iran, and a key to Knufia species

Cited by 5 publications

References 0 publications

Knufia obscura sp. nov. and Knufia victoriae sp. nov., two new species from extreme environments

Knufia obscura sp. nov. and Knufia victoriae sp. nov., two new species from extreme environments

Soil Mycobiome Diversity under Different Tillage Practices in the South of West Siberia

Description of Allocanariomyces and Parachaetomium, two new genera, and Achaetomium aegilopis sp. nov. in the Chaetomiaceae

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