Plasmopara obducensoccurring onImpatiens wallerianahybrids and species in Hungary: Morphological and molecular characterization of the pathogen
| العنوان: | Plasmopara obducensoccurring onImpatiens wallerianahybrids and species in Hungary: Morphological and molecular characterization of the pathogen |
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| المؤلفون: | Gy. Csejk, É. Pájtli, M. Petróczy, László Palkovics |
| المصدر: | Acta Alimentaria. 41:171-179 |
| بيانات النشر: | Akademiai Kiado Zrt., 2012. |
| سنة النشر: | 2012 |
| مصطلحات موضوعية: | biology, Sporangium, fungi, food and beverages, biology.organism_classification, Impatiens walleriana, Plasmopara, Plantlet, Plasmopara obducens, Botany, Ornamental plant, Downy mildew, Impatiens, Food Science |
| الوصف: | In May 2011, young Impatiens walleriana Hook. f. plants showing downy mildew symptoms were collected from a greenhouse (Kecskemet, Hungary). The upper surface of affected leaves turned yellow and white fungal-like growth was observed on the underside. Diseased plants wilted and rapidly collapsed, resulting in losses of nearly 100%. Downy mildew of impatiens can be caused by two pathogens, Plasmopara obducens or Plasmopara constantinescui (syn: Bremiella sphaerosperma), which can be distinguished by the symptoms and by morphology of sporangiophores and sporangia. For molecular identification the 5′-end of the large subunit of ribosomal RNA gene was amplified by PCR using NL1 and NL4 primers and cloned and sequenced. The nucleotide sequence of the Hungarian isolate showed highest identity (99.72%) with two isolates of Plasmopara obducens from the United Kingdom and Serbia. On the basis of the symptoms, molecular and morphological characters, the pathogen was identified as P. obducens. The appearance of the pathogen in Hungary seriously endangers the production of I. walleriana, which is a popular ornamental in gardens and city parks. The chemical plant protection is not effective against the pathogen, by the occurrence of the first symptoms the diseased plants should be removed from the plantlet and must be destroyed. |
| تدمد: | 1588-2535 0139-3006 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_________::84fe3a0a68b4e96b43e18030edc2f9f7Test https://doi.org/10.1556/aalim.41.2012.suppl.16Test |
| رقم الانضمام: | edsair.doi...........84fe3a0a68b4e96b43e18030edc2f9f7 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 15882535 01393006 |
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