First Report of Bleeding Canker Caused by Phytophthora cactorum on Horse Chestnut in Turkey.
Identifieur interne : 002622 ( Main/Exploration ); précédent : 002621; suivant : 002623First Report of Bleeding Canker Caused by Phytophthora cactorum on Horse Chestnut in Turkey.
Auteurs : M. Intini [Italie] ; M. Gurer [Turquie] ; S. Ozturk [Turquie]Source :
- Plant disease [ 0191-2917 ] ; 2002.
Abstract
Bleeding canker on horse chestnut (Aesculus sp.), caused by Phytophthora cactorum (Lebert and Cohn) Schröeter previously has been reported from the United States and Europe (1). In August 2000, it was found for the first time in a park in Ankara Province, Turkey. Symptoms included sparse yellowish brown foliage with abnormally small leaves, and dark-stained spots or dark brown necrosis of the bark on the trunk and main branches, with or without a reddish black gummy exudate. P. cactorum was isolated from tissues taken from the margins of necrotic bark. Pure cultures were slightly radiate, fluffy but not dense, and had short aerial hyphae when grown on carrot agar, potato dextrose agar, or V8 agar. Sporangia were ovoid, strongly papillate, and averaged 35.6 μm in length and 26.8 μm in width (range: 24 to 55 μm × 19 to 40 μm). The isolates were homothallic with smooth-walled paragynous oogonia ranging from 23.5 to 34.5 μm in diameter. To satisfy Koch's postulates, mycelium of P. cactorum was placed under the bark of six branches of healthy horse chestnut. Noninoculated wounds served as controls. Four months later a reddish black gummy exudate was observed oozing from the inoculated wounds, and the bark tissue was necrotic for 3 to 4 cm around each infection. P. cactorum was successfully reisolated from the necrotic bark tissue. Control wounds remained healthy. To our knowledge, this is the first report of this disease on horse chestnut in Asia Minor. Reference: (1) D. C. Erwin and O. K. Ribeiro. Phytophthora Diseases Worldwide. The American Phytopathological Society, St. Paul, MN, 1996.
DOI: 10.1094/PDIS.2002.86.6.697C
PubMed: 30823265
Affiliations:
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Intini</name><affiliation wicri:level="1"><nlm:affiliation>Institute for Forest Tree Pathology, C.N.R. Firenze, Italy.</nlm:affiliation><country xml:lang="fr">Italie</country><wicri:regionArea>Institute for Forest Tree Pathology, C.N.R. Firenze</wicri:regionArea><wicri:noRegion>C.N.R. Firenze</wicri:noRegion></affiliation></author><author><name sortKey="Gurer, M" sort="Gurer, M" uniqKey="Gurer M" first="M" last="Gurer">M. Gurer</name><affiliation wicri:level="1"><nlm:affiliation>General Directorate of National Parks, Game and Wildlife, Ankara, Turkey.</nlm:affiliation><country xml:lang="fr">Turquie</country><wicri:regionArea>General Directorate of National Parks, Game and Wildlife, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author><author><name sortKey="Ozturk, S" sort="Ozturk, S" uniqKey="Ozturk S" first="S" last="Ozturk">S. Ozturk</name><affiliation wicri:level="1"><nlm:affiliation>Middle East Technical University, Afforestation and Landscape Department, Ankara, Turkey.</nlm:affiliation><country xml:lang="fr">Turquie</country><wicri:regionArea>Middle East Technical University, Afforestation and Landscape Department, Ankara</wicri:regionArea><wicri:noRegion>Ankara</wicri:noRegion></affiliation></author></analytic><series><title level="j">Plant disease</title><idno type="ISSN">0191-2917</idno><imprint><date when="2002" type="published">2002</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Bleeding canker on horse chestnut (Aesculus sp.), caused by Phytophthora cactorum (Lebert and Cohn) Schröeter previously has been reported from the United States and Europe (1). In August 2000, it was found for the first time in a park in Ankara Province, Turkey. Symptoms included sparse yellowish brown foliage with abnormally small leaves, and dark-stained spots or dark brown necrosis of the bark on the trunk and main branches, with or without a reddish black gummy exudate. P. cactorum was isolated from tissues taken from the margins of necrotic bark. Pure cultures were slightly radiate, fluffy but not dense, and had short aerial hyphae when grown on carrot agar, potato dextrose agar, or V8 agar. Sporangia were ovoid, strongly papillate, and averaged 35.6 μm in length and 26.8 μm in width (range: 24 to 55 μm × 19 to 40 μm). The isolates were homothallic with smooth-walled paragynous oogonia ranging from 23.5 to 34.5 μm in diameter. To satisfy Koch's postulates, mycelium of P. cactorum was placed under the bark of six branches of healthy horse chestnut. Noninoculated wounds served as controls. Four months later a reddish black gummy exudate was observed oozing from the inoculated wounds, and the bark tissue was necrotic for 3 to 4 cm around each infection. P. cactorum was successfully reisolated from the necrotic bark tissue. Control wounds remained healthy. To our knowledge, this is the first report of this disease on horse chestnut in Asia Minor. Reference: (1) D. C. Erwin and O. K. Ribeiro. Phytophthora Diseases Worldwide. 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In August 2000, it was found for the first time in a park in Ankara Province, Turkey. Symptoms included sparse yellowish brown foliage with abnormally small leaves, and dark-stained spots or dark brown necrosis of the bark on the trunk and main branches, with or without a reddish black gummy exudate. P. cactorum was isolated from tissues taken from the margins of necrotic bark. Pure cultures were slightly radiate, fluffy but not dense, and had short aerial hyphae when grown on carrot agar, potato dextrose agar, or V8 agar. Sporangia were ovoid, strongly papillate, and averaged 35.6 μm in length and 26.8 μm in width (range: 24 to 55 μm × 19 to 40 μm). The isolates were homothallic with smooth-walled paragynous oogonia ranging from 23.5 to 34.5 μm in diameter. To satisfy Koch's postulates, mycelium of P. cactorum was placed under the bark of six branches of healthy horse chestnut. Noninoculated wounds served as controls. Four months later a reddish black gummy exudate was observed oozing from the inoculated wounds, and the bark tissue was necrotic for 3 to 4 cm around each infection. P. cactorum was successfully reisolated from the necrotic bark tissue. Control wounds remained healthy. To our knowledge, this is the first report of this disease on horse chestnut in Asia Minor. Reference: (1) D. C. Erwin and O. K. Ribeiro. Phytophthora Diseases Worldwide. The American Phytopathological Society, St. Paul, MN, 1996.</AbstractText></Abstract><AuthorList CompleteYN="Y"><Author ValidYN="Y"><LastName>Intini</LastName><ForeName>M</ForeName><Initials>M</Initials><AffiliationInfo><Affiliation>Institute for Forest Tree Pathology, C.N.R. 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Intini</name></noRegion></country><country name="Turquie"><noRegion><name sortKey="Gurer, M" sort="Gurer, M" uniqKey="Gurer M" first="M" last="Gurer">M. Gurer</name></noRegion><name sortKey="Ozturk, S" sort="Ozturk, S" uniqKey="Ozturk S" first="S" last="Ozturk">S. Ozturk</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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