Analyses of Multilocus Sequences and Morphological Features Reveal Ilyonectria Species Associated with Black Rot Disease of Gastrodia elata

Black rot is a common disease of Gastrodia elata, causing serious threats to G. elata production. In this study, a total of 17 Cylindrocarpon-like strains were isolated from G. elata black rot tissues. Multilocus sequence analyses based on ITS, HIS, TEF, and TUB combined with morphological character...

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Publié dans:Plant disease. - 1997. - 108(2024), 2 vom: 08. Feb., Seite 382-397
Auteur principal: Qiao, Min (Auteur)
Autres auteurs: Jing, Tingting, Wan, Yake, Yu, Zefen
Format: Article en ligne
Langue:English
Publié: 2024
Accès à la collection:Plant disease
Sujets:Journal Article Ascomycota Orchidaceae pathogenicity taxonomy
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520 |a Black rot is a common disease of Gastrodia elata, causing serious threats to G. elata production. In this study, a total of 17 Cylindrocarpon-like strains were isolated from G. elata black rot tissues. Multilocus sequence analyses based on ITS, HIS, TEF, and TUB combined with morphological characterizations were performed to identify six Ilyonectria species, including four new species, Ilyonectria longispora, I. sinensis, I. xiaocaobaensis, and I. yunnanensis, and two known species, I. changbaiensis and I. robusta. The pathogenicity of 11 isolates comprising type strains of the four new species and representative isolates from each of the six species was tested on healthy tissues of G. elata. All isolates were pathogenic to G. elata tissues, and symptoms were identical to black rot disease, confirming that our isolates were the causal agents of black rot disease of G. elata 
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