First Report of Puccinia thaliae Causing Rust on Canna spp. in Europe
2016; American Phytopathological Society; Volume: 100; Issue: 6 Linguagem: Inglês
10.1094/pdis-12-15-1404-pdn
ISSN1943-7692
AutoresPedro Talhinhas, Edevaldo da Silva, Nathaskia Silva Pereira Nunes, Ana Paula Ramos,
Tópico(s)Yeasts and Rust Fungi Studies
ResumoHomePlant DiseaseVol. 100, No. 6First Report of Puccinia thaliae Causing Rust on Canna spp. in Europe PreviousNext DISEASE NOTES OPENOpen Access licenseFirst Report of Puccinia thaliae Causing Rust on Canna spp. in EuropeP. Talhinhas, E. Silva, N. Nunes, and A. P. RamosP. Talhinhashttp://orcid.org/0000-0001-6694-7502, E. Silva, N. Nunes, and A. P. Ramoshttp://orcid.org/0000-0001-5974-7481AffiliationsAuthors and Affiliations P. Talhinhas E. Silva , LEAF-Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal, and CIFC-Centro de Investigação das Ferrugens do Cafeeiro, Instituto Superior de Agronomia, Universidade de Lisboa, Oeiras, Portugal N. Nunes , Direção Regional de Florestas e Conservação da Natureza, Secretaria Regional do Ambiente e dos Recursos Naturais, Governo da Região Autónoma da Madeira, Funchal, Madeira, Portugal A. P. Ramos , LEAF-Linking Landscape, Environment, Agriculture and Food, Instituto Superior de Agronomia, Universidade de Lisboa, Lisbon, Portugal. Published Online:22 Mar 2016https://doi.org/10.1094/PDIS-12-15-1404-PDNAboutSections ToolsAdd to favoritesDownload CitationsTrack Citations ShareShare onFacebookTwitterLinked InRedditEmailWechat In August and September 2015, rust symptoms were observed on naturalized Canna indica L. plants near Faial da Terra and Feteira villages on São Miguel Island in the Azores archipelago and also on Canna × hybrida plants in a garden at Funchal in Madeira Island, both in Portugal. No rust symptoms were detected in canna on the Portuguese mainland. Disease symptoms were observed on both leaf surfaces, with orange-yellow pustules frequently uniformly covering the entire surface. Infection spots became necrotic with time, and many small holes (3 to 5 mm diameter) developed on older leaves as a result of such necroses. At the Azores, disease incidence was high, with most plants exhibiting disease symptoms, and severity was mostly high, with the surface of many leaves in each plant covered with spore masses. At Madeira, incidence was low, with only a few plants showing symptoms, but severity was moderate, with some leaves per plant exhibiting partial or nearly total coverage by pustules. Microscopic examination of pustules revealed the presence of urediniospores and teliospores. Urediniospores were subglobose, ovoid or piriform, echinulate, 25 to 37 × 18 to 27 μm, with two equatorial pores. Teliospores were clavate to cylindrical, with rounded apex, frequently slightly constricted at the sept, pale-brown, 43 to 67 × 15 to 18 μm, with a short pedicel, matching the description of Puccinia thaliae Dietel (Sivanesan 1970). Infected plant material was stored in the fungal collection of the João de Carvalho e Vasconcelos herbarium (LISI-Fungi) under Accession Nos. LISI-Fungi-00049 and LISI-Fungi-00057 (for Azores and Madeira material, respectively). For the fulfillment of Koch’s postulates, the lower leaf surface of healthy Canna × hybrida plants was inoculated by rubbing a piece of an infected leaf with sporulating urediniospore masses. Inoculated plants were sprayed with sterile water, maintained in a wet chamber under darkness for 24 h at approximately 20°C, and left under glasshouse conditions until appearance of symptoms. Chloroses were visible one week after inoculation and uredinia were observed 15 to 18 days after inoculation. Symptoms and the morphology of urediniospores were similar to those observed in field infections. Canna is a monocotyledonous genus in the family Cannaceae originating from tropical and subtropical regions of America, with several species naturalized in other parts of the world including regions of temperate climate. Plants of Canna × hybrida are popular garden ornamentals in many parts of the world, regarded by horticulturalists as easy to cultivate and virtually disease-free. Canna rust has been reported from different areas of the Americas (Brito and Garrido 2011; Kaur et al. 2011) but also in Australasia (Jeeva et al. 2003; Neo and Tham 2009). This represents the first report of this disease in Portugal and in Europe, raising concern for its dissemination into European and North African Canna.References:Brito, M., and Garrido, M. J. 2011. Fitopatol. Venez. 24:59. Google ScholarJeeva, M. L., et al. 2003. New Dis. Rep. 8:24. Google ScholarKaur, R., et al. 2011. Plant Dis. 95:353. https://doi.org/10.1094/PDIS-03-10-0209. Link, ISI, Google ScholarNeo, N. W., and Tham, F. Y. 2009. New Dis. Rep. 19:67. Google ScholarSivanesan, A. 1970. Descriptions of Pathogenic Fungi and Bacteria, No. 267. CMI, Kew, Surrey, UK. Google ScholarDetailsFiguresLiterature CitedRelated Vol. 100, No. 6 June 2016SubscribeISSN:0191-2917e-ISSN:1943-7692 Metrics Article History Issue Date: 12 May 2016Published: 22 Mar 2016First Look: 19 Jan 2016Accepted: 9 Jan 2016 Pages: 1242-1242 Information© 2016 The American Phytopathological SocietyCited byFirst Report of Puccinia thaliae Causing Leaf Rust on Canna indica in MalaysiaYing Wei Khoo, Hui Teng Tan, Yam Sim Khaw, Shi-Fang Li, and Khim Phin Chong11 May 2022 | Plant Disease, Vol. 106, No. 6Puccinia thaliaeCABI Compendium, Vol. CABI CompendiumPathological and Epidemiological Characterization of First Outbreak of Daylily Rust in Europe and Evaluation of Puccinia hemerocallidis Resistance in Hemerocallis Cultivars31 March 2020 | Plants, Vol. 9, No. 4Occurrence of Puccinia spp. spores in Madeira Island and their phytopathological importance19 September 2017 | European Journal of Plant Pathology, Vol. 150, No. 4
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