Topic
Pythiales
About: Pythiales is a research topic. Over the lifetime, 3 publications have been published within this topic receiving 130 citations.
Papers
TL;DR: Maximum parsimony analysis of the three DNA regions revealed four major clades, reflective of sporangial morphology, and a number of species have been proposed to be the elusive intermediate species in the Pythium-to-Phytophthora evolutionary line.
Abstract: Fifty-eight isolates representing 39 Pythium species and 17 isolates representing nine Phytophthora species were chosen to investigate intra- and intergeneric relationships with sequence analysis of three genomic areas. The internal transcribed spacer regions (ITS1 and ITS2), including the 5.8S gene of the ribosomal DNA were PCR amplified with the universal primers ITS1 and ITS4. On the other hand 563 bp of the cytochrome oxidase II (cox II) gene was amplified with the primer pair FM66 and FM58 for Pythium and FM75 and FM78 for Phytophthora. The 658 bp partial beta-tubulin gene was amplified with the forward primer BT5 and reverse primer BT6. Maximum parsimony analysis of the three DNA regions revealed four major clades, reflective of sporangial morphology. Clade 1 was composed of Pythium isolates that bear filamentous to lobulate sporangia. Clade 2 represents Pythium isolates that bear globose to spherical zoosporangia or spherical hyphal swellings. Meanwhile Phytophthora isolates were lumped into Clade 3 wherein the papillate, semipapillate and nonpapillate species occupied separate subclades. Lastly, Clade 4 was composed of Pythium species that bear subglobose sporangia resembling the papillate sporangia observed in Phytophthora. Hence a number of species (Ph. undulata, P. helicoides, P. ostracodes, P. oedochilum and P. vexans) have been proposed to be the elusive intermediate species in the Pythium-to-Phytophthora evolutionary line.
165 citations
TL;DR: A previously unknown overwintering strategy for the pathogen Ph. infestans is suggested, indicating a possible influence of the wild species S. dulcamara on the epidemiology of potato late blight in Sweden.
10 citations
30 Jun 2014
TL;DR: A list and the distribution of Oomycota species in the Tatra Mts (Western Carpathian Mts) are presented and revised herbarium vouchers and literature data were used for analysis.
Abstract: A list and the distribution of Oomycota species in the Tatra Mts (Western Carpathian Mts) are presented. Revised herbarium vouchers and literature data were used for analysis. Thirty two species of oomycetes on fifty seven plant species were noted in the area, including two species of the order Albuginales (genera: Albugo and Pustula, on nine plant species), 29 species of the order Peronosporales (genera: Bremia, Hyaloperonospora, Peronospora and Plasmopara, on 49 plant species), and one species of the order Pythiales (genus: Myzocytium, on one species of algae). Twenty nine species were collected on the Polish side of the Tatra Mts and ten species were collected on the Slovak side. The oomycetes were collected at 185 localities.
2 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2020 | 1 |
| 2014 | 1 |
| 2006 | 1 |