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| Hyde, K.D.; Chomnunti, P.; Crous, P.W.; Groenewald, J.Z.; Damm, U.; Ko Ko, T.W.; Shivas, R.G.; Summerell, B.A.; Tan, Y.P.. |
| Several filamentous oomycete species of the genus Halophytophthora have recently been described from marine environments, mostly from subtropical and tropical ecosystems. During a survey of oomycetes from leaf litter of Spartina alterniflora in salt marshes of southeastern Georgia, isolates of four taxa were recovered that bore similarity to some members of Halophytophthora but were highly divergent from isolates of Halophytophthora s.str. based on a combined sequence analysis of two nuclear loci. In phylogenetic analyses, these isolates were placed basal to a monophyletic group comprised of Pythium of the Pythiaceae and the Peronosporaceae. Sequence and morphology of these taxa diverged from the type species Halophytophthora vesicula, which was placed... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Internal transcribed spacer; Nuclear ribosomal large subunit (nrLSU); Peronosporales; Phylogeny; Pythiaceae. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/532294 |
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| Cock, A.W.A.M. de; Lodhi, A.M.; Rintoul, T.L.; Bala, K.; Robideau, G.P.; Gloria Abad, Z.; Coffey, M.D.; Shahzad, S.; Lévesque, C.A.. |
| The genus Phytopythium (Peronosporales) has been described, but a complete circumscription has not yet been presented. In the present paper we provide molecular-based evidence that members of Pythium clade K as described by Lévesque & de Cock (2004) belong to Phytopythium. Maximum likelihood and Bayesian phylogenetic analysis of the nuclear ribosomal DNA (LSU and SSU) and mitochondrial DNA cytochrome oxidase subunit 1 (COI) as well as statistical analyses of pairwise distances strongly support the status of Phytopythium as a separate phylogenetic entity. Phytopythium is morphologically intermediate between the genera Phytophthora and Pythium. It is unique in having papillate, internally proliferating sporangia and cylindrical or lobate antheridia. The... |
| Tipo: Article / Letter to the editor |
Palavras-chave: COI; LSU; Oomycetes; Oomycota; Peronosporales; Phytopythium; Pythiales; SSU. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/560055 |
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| Bala, K.; Robideau, G.P.; Désaulniers, N.; Cock, A.W.A.M. de; Lévesque, C.A.. |
| Three new species of Pythium, namely, P. oopapillum, P. emineosum and P. camurandrum are presented in this paper based on morphological descriptions and molecular phylogenetic characterisation. These new species were isolated from various ecological regions in Canada. They have unique morphological features in the genus Pythium, and form distinct clades in maximum parsimony analyses, which are also supported by maximum likelihood phylogeny using general time reversible model (GTR), and Bayesian inference (BI) phylogeny using Markov Chain Monte Carlo (MCMC) analysis methods. A comparative study of the new species with closely related taxa, their clade positions, and morphological features are described in this paper. |
| Tipo: Article / Letter to the editor |
Palavras-chave: COI; ITS rDNA; LSU rDNA; Oomycete; Peronosporales; Pythium; Taxonomy. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/531810 |
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