Filobasidiella lutea: parasitism of Hypochnicium vellereum

Ginns, J.; Bernicchia, Annarosa

doi:10.29203/ka.2000.351

Cited by 6 publications

(2 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The haustorial branches in Filobsidiella depauperata are morphologically similar to those in F. lutea (see GINNS & BERNICCHIA 2000). In both species the inflated base of the branch arises directly from a hypha and is subtended by a simple septum.…”

Section: Discussionmentioning

confidence: 83%

Filobasidiella depauperata (Tremellales): Haustorial branches and parasitism of Verticillium lecanii

Ginns¹,

Malloch

2003

Mycol Progress

View full text Add to dashboard Cite

Section: Discussionmentioning

confidence: 83%

Filobasidiella depauperata (Tremellales): Haustorial branches and parasitism of Verticillium lecanii

Ginns¹,

Malloch

2003

Mycol Progress

View full text Add to dashboard Cite

“…There are only two strains of C. depauperatus available: CBS7841, which was isolated from a dead spider in Canada ( Malloch et al, 1978 ), and CBS7855, which was isolated from a dead caterpillar in the Czech Republic ( Kubátová, 1992 ). Interestingly, C. depauperatus , possibly along with C. luteus , are the only naturally occurring Cryptococcus species with no known yeast phase ( Malloch et al, 1978 ; Kwon-Chung et al, 1995 ; Roberts, 1997 ; Ginns and Bernicchia, 2000 ). Indeed, in contrast to the dimorphic growth of C. neoformans and C. gattii , which are usually yeasts in the asexual stage and produce hyphae, basidia, and basidiospores during the sexual stage, C. depauperatus grows by continuously producing hyphae, basidia, and basidiospores under typical laboratory conditions ( Kwon-Chung et al, 1995 ) with no budding yeast cells observed during its entire life cycle.…”

Section: Introductionmentioning

confidence: 99%

Obligate sexual reproduction of a homothallic fungus closely related to the Cryptococcus pathogenic species complex

Passer

Clancey

Shea

et al. 2022

eLife

View full text Add to dashboard Cite

Sexual reproduction is a ubiquitous and ancient trait of eukaryotic life. While sexual organisms are usually faced with the challenge of finding a compatible mating partner, species as diverse as animals, plants, and fungi have repeatedly evolved the ability to reproduce sexually without an obligate requirement for another individual. Here, we uncovered the underlying mechanism of self-compatibility (homothallism) in Cryptococcus depauperatus, a fungal species sister to the clinically relevant human fungal pathogens Cryptococcus neoformans and Cryptococcus gattii species complexes. In contrast to C. neoformans or C. gattii, which grow as a yeast in the asexual stage, and produce hyphae, basidia, and infectious spores during the sexual stage, C. depauperatus grows exclusively as hyphae decorated with basidia and abundant spores and appears to be continuously engaged in sexual reproduction. By combining the insights from comparative genomics and genetic analyses of mutants defective in key mating and meiosis genes, we demonstrate the sexual cycle of C. depauperatus involves meiosis, and reveal that self-compatibility is orchestrated by the expression, in the same cell, of an unlinked mating receptor (Ste3a) and pheromone ligand (MFa) pair seemingly derived from opposite mating types of a heterothallic (self-sterile) ancestor. We identified a putative mating-type (MAT) determining region containing genes phylogenetically aligned with MAT<strong>a</strong> alleles of other species, and a few MATa gene alleles scattered and unlinked throughout the genome, but no homologs of the mating-type homeodomain genes SXI1 (HD1) and SXI2 (HD2). Comparative genomic analyses suggested a dramatic remodeling of the MAT locus possibly owing to reduced selective constraints to maintain mating-type genes in tight linkage, associated with a transition to self-fertility. Our findings support C. depauperatus as an obligately sexual, homothallic fungal species and provide additional insight into the repeated transitions between modes of sexual reproduction that have occurred throughout the fungal kingdom.

show abstract

Cryptococcus depauperatus, a close relative of the human-pathogen C. neoformans, associated with coffee leaf rust (Hemileia vastatrix) in Cameroon

et al. 2021

View full text Add to dashboard Cite

Filobasidiella lutea: parasitism of Hypochnicium vellereum

Abstract: The presence of haustoria! branches and a restricted host range suggest that Filobasidiella lutea is a mycoparasite. Microscopic features are illustrated from recent Italian collections.

Cited by 6 publications

References 5 publications

Filobasidiella depauperata (Tremellales): Haustorial branches and parasitism of Verticillium lecanii

Filobasidiella depauperata (Tremellales): Haustorial branches and parasitism of Verticillium lecanii

Obligate sexual reproduction of a homothallic fungus closely related to the Cryptococcus pathogenic species complex

Cryptococcus depauperatus, a close relative of the human-pathogen C. neoformans, associated with coffee leaf rust (Hemileia vastatrix) in Cameroon

Contact Info

Product

Resources

About