TY - JOUR
T1 - Emendation of the basidiomycetous yeast genus Kondoa and the description of Kondoa aeria sp. nov
AU - Fonseca, Álvaro Luís Afonso Moreira Rato da
AU - Sampaio, José Paulo Nunes de Sousa
AU - Inácio, João
AU - Fell, Jack W.
N1 - Funding Information:
This research was supported in part by ‘Fundação para a Ciência e Tecnologia’ (Praxis/PCNA/C/BIA/174/96, Portugal). J. Inácio was a recipient of a grant from ‘Fundação para a Ciência e Tecnologia’ (GGP XXI/BICJ/3855/96, Portugal). Funding for J.W. Fell was provided by the National Science Foundation, Division of Ocean Sciences (USA). The authors are indebted to Dr. Michael Weiss (University of Tübingen, Germany) for reviewing the latin diagnosis of Kondoa aeria.
PY - 2000
Y1 - 2000
N2 - The genus Kondoa Y. Yamada, Nakagawa and Banno was erected to accommodate a single taxon, K. malvinella Y. Yamada, Nakagawa and Banno, which was transferred from the teliospore-forming genus Rhodosporidium Banno based on pronounced differences in the 5S and 26S ribosomal RNA (rRNA) nucleotide sequences to R. toruloides Banno. In contrast with the original description, reinvestigation of K malvinella revealed the formation of transversely septate (auricularioid) basidia that did not arise on teliospores, but formed directly on the dikaryotic mycelium. The four-celled basidia developed sterigmata on which forcibly discharged asymmetric basidiospores (ballistospores) were produced. Additionally, a new taxon emerged from the study of recent isolates, for which the name K. aeria sp. nov. is proposed. This new species produced two-celled auricularioid basidia on hyphae with incomplete clamp connections. Ballistospores arose on the basidia at the tip of sterigmata and, after ejection, germinated by budding. These observations led us to present an emended diagnosis for the genus Kondoa. Analysis of the sequence data from the D1/D2 region of the 26S rRNA gene showed a very close resemblance between K. aeria and K malvinella in a cluster that also contained several Bensingtonia species. Taxa in this cluster share specific physiological traits and produce characteristic pinkish-cream to mauve colonies; in contrast, formation of ballistoconidia is only observed in the Bensingtonia species. Sequence data supported placement of K. malvinella and K. aeria in the 'Agaricostilbum clade' of the Urediniomycetes.
AB - The genus Kondoa Y. Yamada, Nakagawa and Banno was erected to accommodate a single taxon, K. malvinella Y. Yamada, Nakagawa and Banno, which was transferred from the teliospore-forming genus Rhodosporidium Banno based on pronounced differences in the 5S and 26S ribosomal RNA (rRNA) nucleotide sequences to R. toruloides Banno. In contrast with the original description, reinvestigation of K malvinella revealed the formation of transversely septate (auricularioid) basidia that did not arise on teliospores, but formed directly on the dikaryotic mycelium. The four-celled basidia developed sterigmata on which forcibly discharged asymmetric basidiospores (ballistospores) were produced. Additionally, a new taxon emerged from the study of recent isolates, for which the name K. aeria sp. nov. is proposed. This new species produced two-celled auricularioid basidia on hyphae with incomplete clamp connections. Ballistospores arose on the basidia at the tip of sterigmata and, after ejection, germinated by budding. These observations led us to present an emended diagnosis for the genus Kondoa. Analysis of the sequence data from the D1/D2 region of the 26S rRNA gene showed a very close resemblance between K. aeria and K malvinella in a cluster that also contained several Bensingtonia species. Taxa in this cluster share specific physiological traits and produce characteristic pinkish-cream to mauve colonies; in contrast, formation of ballistoconidia is only observed in the Bensingtonia species. Sequence data supported placement of K. malvinella and K. aeria in the 'Agaricostilbum clade' of the Urediniomycetes.
KW - Basidiomycetous yeasts
KW - Kondoa aeria sp. nov.
KW - Ribosomal DNA sequencing
KW - Taxonomy
UR - http://www.scopus.com/inward/record.url?scp=0034022568&partnerID=8YFLogxK
U2 - 10.1023/A:1002453628455
DO - 10.1023/A:1002453628455
M3 - Article
C2 - 15188895
SN - 0003-6072
VL - 77
SP - 293
EP - 302
JO - Antonie van Leeuwenhoek
JF - Antonie van Leeuwenhoek
IS - 3
ER -