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26 results for “Pythium”
Resistance test to Pythium in common bean
<p>This video dhows the steps in resistance tests to Pythium ultimum in common bean in controlled conditions and it is parts of a set edited to spread the plant breeding job.</p> <p>A dissemination task developed by the Plant Genetic Group (SERIDA) for the BRESOV project</p> <p>Available in the Link : https://www.youtube.com/watch?v=YqjKjceqTGk&t=2s</p> <p>DOI :10.5281/zenodo.5557265</p>
FIG. 5 in Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran
FIG. 5. — Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov. (IRAN 16695 F, holotype): A, terminal hyphal swelling; B, intercalary hyphal swelling; C, D, monoclinous antheridia with inflated or non-inflated antheridial stalks and antheridial cells attached to oogonia; E, monoclinous antheridium originated from swollen part of oogonial stalk; F, monoclinous antheridium and intercalary oogonium with two oospores; G, intercalary oogonium provided with two onoclinous antheridia; H, diclinous antheridium and intercalary oogonium;I, sessile diclinous antheridium with constriction attached to oogonium; J, chain of ogonia and hyphal swelling; K, plerotic oospores; L, aplerotic oospore; M, peanut-shaped oospore; N, double oospore. Scale bars: A, 10 µm; B-E, 5 µm F-N, 10 µm.
FIG. 2 in Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran
FIG. 2.— Neighbor-joining tree of Pythium Pringsheim clades F and G species inferred from partial coxI sequences. Bayesian/maximum parsimony/neighborjoining posterior probabilities and bootstrap support values are given at the nodes. – indicates support <50% for a particular clade. Pythium minus Ali-Shtayeh (CBS 22688) from clade E was used as outgroup. Scale bar: 0.01 substitutions.
FIG. 1 in Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran
FIG. 1.— Neighbor-joining tree of Pythium Pringsheim clades F and G species inferred from complete ITS region sequences. Bayesian/maximum parsimony/ neighbor-joining posterior probabilities and bootstrap support values are given at the nodes. – indicates support <50% for a particular clade. Pythium minus AliShtayeh (CBS 22688) from clade E was used as outgroup. Scale bar: 0.1 substitutions.
FIG. 3 in Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran
FIG. 3.— Neighbor-joining tree of Pythium Pringsheim clade J1 species inferred from complete ITS region sequences. Bayesian/maximum parsimony/neighborjoining posterior probabilities and bootstrap support values are given at the nodes. – indicates support <50% for a particular clade. Phytopythium litorale (Nechw.) Abad, de Cock, Bala, Robideau, Lodhi & Lévesque (CBS 118360) was used as outgroup. Scale bar: 0.1 substitutions.
FIG. 6 in Morphological and molecular taxonomy of Pythium monoclinum Abrinbana, Abdollahz. & Badali, sp. nov., and P. iranense, sp. nov., from Iran
FIG. 6.— Pythium iranense Badali, Abrinbana & Abdollahz., sp. nov. (IRAN 16697 F, holotype): A, terminal hyphal swelling; B, monoclinous antheridium and terminal oogonium; C, two diclinous antheridia attached to oogonium; D, antheridium with wavy stalk and oogonium; E, sessile diclinous antheridium and terminal oogonium; F, antheridial cell with constriction; G, bell-shaped sessile monoclinous antheridium and terminal oogonium on short side branch; H, antheridia attached to oogonium; I, J, crowd of antheridia around oogonia; K, lateral oogonium; L, plerotic and aplerotic oospores; M, peanut-shaped oospore; N, double oospore; O, quadruple oospore; P, oogonium with three papilla; Q, R, immature oospores with projections. Scale bars: A-M, 10 µm; N-R, 5 µm.
Data from: Whole genome sequencing and phylogenomic analysis show support for the splitting of genus Pythium
<p>The genus <em>Pythium</em><span> (nom. cons.) sensu lato (s.l.) is composed of many important species of plant pathogens. Early molecular phylogenetic studies suggested paraphyly of </span><em>Pythium</em><span>, which led to a formal proposal by Uzuhashi and colleagues in 2010 to split the genus into </span><em>Pythium</em><span> sensu stricto (s.s.), </span><em>Elongisporangium, Globisporangium, Ovatisporangium</em><span> (= </span><em>Phytopythium</em><span>), and </span><em>Pilasporangium</em><span> using morphological characters and phylogenies of the mt cytochrome </span><em>c</em><span> oxidase subunit 2 (</span><em>cox2</em><span>) and D1–D2 domains of nuc 28S rDNA. Although the split was fairly justified by the delineating morphological characters, there were weaknesses in the molecular analyses, which created reluctance in the scientific community to adopt these new genera for the description of new species. In this study, this issue was addressed using phylogenomics. Whole genomes of 109 strains of </span><em>Pythium</em><span> and close relatives were sequenced, assembled, and annotated. These data were combined with 10 genomes sequenced in previous studies. Phylogenomic analyses were performed with 148 single-copy genes represented in at least 90% of the taxa in the data set. The results showed support for the division of </span><em>Pythium</em><span> s.l. The status of alternative generic names that have been used for species of </span><em>Pythium</em><span> in the past (e.g., </span><em>Artotrogus, Cystosiphon, Eupythium, Nematosporangium, Rheosporangium, Sphaerosporangium</em><span>) was investigated. Based on our molecular analyses and review of the </span><em>Pythium</em><span> generic concepts, we urge the scientific community to adopt the generic names </span><em>Pythium, Elongisporangium, Globisporangium</em><span>, and their concepts as proposed by Uzuhashi and colleagues in 2010 in their work going forward. In order to consolidate the taxonomy of these genera, some of the recently described </span><em>Pythium</em><span> spp. are transferred to </span><em>Elongisporangium</em><span> and </span><em>Globisporangium</em><span>.</span></p>
FIGURE 1 in Pythium cedri sp. nov. (Pythiaceae, Pythiales) from southern China based on morphological and molecular characters
FIGURE 1. Strict consensus tree illustrating the phylogeny of Pythium in clade D species generated by maximum parsimony based on ITS+COI sequences. Branches are labeled with parsimony bootstrap proportions (before slanting line) high than 50% and Bayesian posterior probabilities (after slanting line) more than 0.95. Phy. refers to Phytopythium.
FIGURE 3 in Pythium cedri sp. nov. (Pythiaceae, Pythiales) from southern China based on morphological and molecular characters
FIGURE 3. Asexual and sexual reproductive bodies of Pythium cedri (Chen 4). A. Mycelium. B. Hyphal swellings. C. Various sporangia. D. Globose and toruloid sporangia. E. Intercalary sporangium. F–H. Toruloid sporangia. I. Terminal sporangium. J. A terminal oogonium with a nearly plerotic oospore and a monoclinous antheridium. K. Plerotic oospore and round antheridial cell. L. Elongated antheridial cell wavy in contour. M. Plerotic oospore and two antheridia. N. Clustering of several antheridial cells around the oogonium. O. A terminal oogonium with a nearly plerotic oospore and a monoclinous antheridium. Scale bars A–I=10 μm, J–O=20μm.
FIGURE 2 in Two new Pythium species from southern China based on morphological and molecular characters
FIGURE 2. Asexual and sexual reproductive bodies of Pythium subinflatum (Chen 262). A. Catenulate hyphal swellings. B–C. Globose, terminal hyphal swellings. D–E. Filamentous, inflated sporangia. F–H. Globose, smooth and terminal oogonia. I. Oogonium with a projection. J. Aplerotic oospore. K. Diclinous antheridium. L. Aplerotic oospore and two antheridia. Scale bars A =2 μm, B–J=10 μm.
FIGURE 3 in Two new Pythium species from southern China based on morphological and molecular characters
FIGURE 3. Asexual and sexual reproductive bodies of Pythium xuzhouense (Chen 136). A. Filamentous inflated sporangium. B. Filamentous non-inflated sporangia. C–D. Lobulate sporangia. E–F. Globose and smooth oogonia. G. Oogonium with a projection. H. Two diclinous antheridia. I. Plerotic oospore and three antheridia. Scale bars A–J=10 μm.
FIGURE 1 in Two new Pythium species from southern China based on morphological and molecular characters
FIGURE 1. Phylogeny of species in Pythium clade B species generated by maximum parsimony based on ITS+COI sequences. Branches are labeled with parsimony bootstrap proportions (before slanting line) high than 50% and Bayesian posterior probabilities (after slanting line) more than 0.95.
Data from: Characterization of Pythium spp. associated with asymptomatic soybeans in southeastern Pennsylvania
Open the record for dataset details and reuse information.
Data from: Whole genome sequencing and phylogenomic analysis show support for the splitting of genus Pythium
Open the record for dataset details and reuse information.
FIGURE 2. Cedrus deodara infected with Pythium cedri. A in Pythium cedri sp. nov. (Pythiaceae, Pythiales) from southern China based on morphological and molecular characters
FIGURE 2. Cedrus deodara infected with Pythium cedri. A. Dieback of crowns. B–C. Rotten roots.
Gene expression in rice roots after Pythium arrhenomsnes infection versus mock infection
GEO Series GSE133268. Oryza sativa. 6 samples. Type: Expression profiling by array.
Transcriptome profiling of Pythium graminicola-inoculated rice roots.
GEO Series GSE32582. Oryza sativa Japonica Group; Oryza sativa. 9 samples. Type: Expression profiling by array.
Biological Control of Root-Knot Nematode Meloidogyne incognita Infection of Tomato (Solanum lycopersicum L.) by the Oomycete Biocontrol Agent Pythium oligandrum
GEO Series GSE262653. Solanum lycopersicum. 6 samples. Type: Expression profiling by high throughput sequencing.
Volatile organic compounds emitted by the biocontrol agent Pythium oligandrum contribute to ginger plant growth and disease resistance
GEO Series GSE235182. Zingiber officinale. 6 samples. Type: Expression profiling by high throughput sequencing.
Characterization of Pythium transcriptome and gene expression analysis for different fermentation stage
GEO Series GSE43320. Globisporangium splendens. 3 samples. Type: Expression profiling by high throughput sequencing.
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