Morphological and molecular characterization of Phytophthora glovera sp. nov. from tobacco in Brazil.
Identifieur interne : 001778 ( Main/Corpus ); précédent : 001777; suivant : 001779Morphological and molecular characterization of Phytophthora glovera sp. nov. from tobacco in Brazil.
Auteurs : Z Gloria Abad ; Kelly L. Ivors ; Courtney A. Gallup ; Jorge A. Abad ; H David ShewSource :
- Mycologia [ 0027-5514 ]
English descriptors
- KwdEn :
- Brazil (MeSH), Fungal Proteins (genetics), Molecular Sequence Data (MeSH), Phylogeny (MeSH), Phytophthora (classification), Phytophthora (genetics), Phytophthora (growth & development), Phytophthora (isolation & purification), Plant Diseases (microbiology), Tobacco (microbiology), Tubulin (genetics).
- MESH :
- chemical , genetics : Fungal Proteins, Tubulin.
- geographic : Brazil.
- classification : Phytophthora.
- genetics : Phytophthora.
- growth & development : Phytophthora.
- isolation & purification : Phytophthora.
- microbiology : Plant Diseases, Tobacco.
- Molecular Sequence Data, Phylogeny.
Abstract
A root rot disease of cultivated tobacco called yellow stunt has been observed in the burley tobacco production areas of Brazil since the early 1990s. Root infecting fungi and straminipiles were isolated from the roots of diseased tobacco plants, including a semi-papillate, homothallic, slow growing Phytophthora species. Pathogenicity trials confirmed that Phytophthora sp. caused root rot and stunting of burley and flue-cured tobaccos. Morphological characteristics of the asexual and sexual stages of this organism did not match any reported Phytophthora species and were very different from the widely known tobacco black shank pathogen P. nicotianae. Phylogenetic analysis based on sequences of the internal transcribed spacer rDNA, β-tubulin and translation elongation factor 1-α regions indicated that this organism represents a previously unreported Phytophthora species that is significantly supported in clade 2 and most closely related to P. capsici. However P. glovera differs from P. capsici in a number of morphological characters, most significantly P. glovera is homothallic and produces both paragynous and amphigynous antheridia while P. capsici is heterothallic and produces only amphigynous antheridia. In this paper we confirmed pathogenicity of this species on tobacco and describe the morphological and molecular characteristics of Phytophthora glovera sp. nov.
DOI: 10.3852/09-157
PubMed: 21193600
Links to Exploration step
pubmed:21193600Le document en format XML
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<author><name sortKey="Abad, Z Gloria" sort="Abad, Z Gloria" uniqKey="Abad Z" first="Z Gloria" last="Abad">Z Gloria Abad</name>
<affiliation><nlm:affiliation>United States Department of Agriculture, USDA-APHIS-PPQ-PHP-RIPPS, Molecular Diagnostics Laboratory (MDL), Building 580, BARC-E, Powder Mill Road, Beltsville, Maryland 20705, USA.</nlm:affiliation>
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<author><name sortKey="Ivors, Kelly L" sort="Ivors, Kelly L" uniqKey="Ivors K" first="Kelly L" last="Ivors">Kelly L. Ivors</name>
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<author><name sortKey="Gallup, Courtney A" sort="Gallup, Courtney A" uniqKey="Gallup C" first="Courtney A" last="Gallup">Courtney A. Gallup</name>
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<author><name sortKey="Abad, Jorge A" sort="Abad, Jorge A" uniqKey="Abad J" first="Jorge A" last="Abad">Jorge A. Abad</name>
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<author><name sortKey="Shew, H David" sort="Shew, H David" uniqKey="Shew H" first="H David" last="Shew">H David Shew</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en">Morphological and molecular characterization of Phytophthora glovera sp. nov. from tobacco in Brazil.</title>
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<affiliation><nlm:affiliation>United States Department of Agriculture, USDA-APHIS-PPQ-PHP-RIPPS, Molecular Diagnostics Laboratory (MDL), Building 580, BARC-E, Powder Mill Road, Beltsville, Maryland 20705, USA.</nlm:affiliation>
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<author><name sortKey="Ivors, Kelly L" sort="Ivors, Kelly L" uniqKey="Ivors K" first="Kelly L" last="Ivors">Kelly L. Ivors</name>
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<profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Brazil (MeSH)</term>
<term>Fungal Proteins (genetics)</term>
<term>Molecular Sequence Data (MeSH)</term>
<term>Phylogeny (MeSH)</term>
<term>Phytophthora (classification)</term>
<term>Phytophthora (genetics)</term>
<term>Phytophthora (growth & development)</term>
<term>Phytophthora (isolation & purification)</term>
<term>Plant Diseases (microbiology)</term>
<term>Tobacco (microbiology)</term>
<term>Tubulin (genetics)</term>
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<term>Tubulin</term>
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<keywords scheme="MESH" qualifier="classification" xml:lang="en"><term>Phytophthora</term>
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<keywords scheme="MESH" qualifier="genetics" xml:lang="en"><term>Phytophthora</term>
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<keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Plant Diseases</term>
<term>Tobacco</term>
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<keywords scheme="MESH" xml:lang="en"><term>Molecular Sequence Data</term>
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<front><div type="abstract" xml:lang="en">A root rot disease of cultivated tobacco called yellow stunt has been observed in the burley tobacco production areas of Brazil since the early 1990s. Root infecting fungi and straminipiles were isolated from the roots of diseased tobacco plants, including a semi-papillate, homothallic, slow growing Phytophthora species. Pathogenicity trials confirmed that Phytophthora sp. caused root rot and stunting of burley and flue-cured tobaccos. Morphological characteristics of the asexual and sexual stages of this organism did not match any reported Phytophthora species and were very different from the widely known tobacco black shank pathogen P. nicotianae. Phylogenetic analysis based on sequences of the internal transcribed spacer rDNA, β-tubulin and translation elongation factor 1-α regions indicated that this organism represents a previously unreported Phytophthora species that is significantly supported in clade 2 and most closely related to P. capsici. However P. glovera differs from P. capsici in a number of morphological characters, most significantly P. glovera is homothallic and produces both paragynous and amphigynous antheridia while P. capsici is heterothallic and produces only amphigynous antheridia. In this paper we confirmed pathogenicity of this species on tobacco and describe the morphological and molecular characteristics of Phytophthora glovera sp. nov.</div>
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<Title>Mycologia</Title>
<ISOAbbreviation>Mycologia</ISOAbbreviation>
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<ArticleTitle>Morphological and molecular characterization of Phytophthora glovera sp. nov. from tobacco in Brazil.</ArticleTitle>
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<Abstract><AbstractText>A root rot disease of cultivated tobacco called yellow stunt has been observed in the burley tobacco production areas of Brazil since the early 1990s. Root infecting fungi and straminipiles were isolated from the roots of diseased tobacco plants, including a semi-papillate, homothallic, slow growing Phytophthora species. Pathogenicity trials confirmed that Phytophthora sp. caused root rot and stunting of burley and flue-cured tobaccos. Morphological characteristics of the asexual and sexual stages of this organism did not match any reported Phytophthora species and were very different from the widely known tobacco black shank pathogen P. nicotianae. Phylogenetic analysis based on sequences of the internal transcribed spacer rDNA, β-tubulin and translation elongation factor 1-α regions indicated that this organism represents a previously unreported Phytophthora species that is significantly supported in clade 2 and most closely related to P. capsici. However P. glovera differs from P. capsici in a number of morphological characters, most significantly P. glovera is homothallic and produces both paragynous and amphigynous antheridia while P. capsici is heterothallic and produces only amphigynous antheridia. In this paper we confirmed pathogenicity of this species on tobacco and describe the morphological and molecular characteristics of Phytophthora glovera sp. nov.</AbstractText>
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