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First report of Sphenospora kevorkianii (Raveneliaceae) on the orchid Catasetum fimbriatum in Brazil

2004; Wiley; Volume: 53; Issue: 2 Linguagem: Inglês

10.1111/j.0032-0862.2004.00969.x

1365-3059

Olinto Liparini Pereira, Robert W. Barreto,

Fern and Epiphyte Biology

Plant PathologyVolume 53, Issue 2 p. 256-256 Free Access First report of Sphenospora kevorkianii (Raveneliaceae) on the orchid Catasetum fimbriatum in Brazil O. L. Pereira, O. L. Pereira Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36571-000, Brazil E-mail: liparini@bol.com.brSearch for more papers by this authorR. W. Barreto, R. W. Barreto Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36571-000, BrazilSearch for more papers by this author O. L. Pereira, O. L. Pereira Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36571-000, Brazil E-mail: liparini@bol.com.brSearch for more papers by this authorR. W. Barreto, R. W. Barreto Departamento de Fitopatologia, Universidade Federal de Viçosa, Viçosa, MG, 36571-000, BrazilSearch for more papers by this author First published: 28 April 2004 https://doi.org/10.1111/j.0032-0862.2004.00969.xCitations: 1 AboutSectionsPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Catasetum fimbriatum is a commonly cultivated orchid found naturally in Brazil. In October 2001, cultivated C. fimbriatum plants from a commercial orchid nursery in the state of Rio de Janeiro (Brazil) were found to be attacked by a rust disease which rapidly disseminated to other plants. The causal agent was identified as Sphenospora kevorkianii, a rust fungus which was first reported from the orchid Epidendrum difforme in Nicaragua (Linder, 1944). In Brazil, S. kevorkianii has been reported on Cyrtopodium punctatum, Notylia lyrata, Prescottia sclerophylla, Stanhopea graveolens, Zygostates lunata (Hennen et al., 1982) and Pleurothallis mentigera (Pereira et al., 2002). Leaf lesions were either yellowish, due to the presence of a powdery mass of urediniospores, or orange-brown, due to the abundance of dark orange coloured oil droplets, associated with the erumpent telia (Cummins & Hiratsuka, 1983). Lesions were observed on both leaf surfaces. Morphological features of the fungus (VIC 26509) were: spermogonia and aecia unknown; uredinia amphigenous, subepidermal, becoming erumpent, 150–400 µm diameter; urediniospores ovoid, 26·5–31·5 × 17·0–24·0 µm, cell wall 1·5–3·5 µm thick, germ-pore indistinct; telia subepidermal, becoming erumpent due to the abundance of dark orange coloured oil droplets, about 1 mm diameter; teliospores ellipsoid, pedicelate, thin-walled, hyaline, 22·0–26·5 × 12·5–15·5 µm; paraphyses clavate, yellowish, 87–110 × 8–10 µm; basidiospores not observed. Sphenospora kevorkianii has so far been reported only from three tribes of the subfamily Epidendroideae (Cymbidieae, Maxillarieae and Epidendreae) and only once from a member of Spiranthoideae. This is only the second report of S. kevorkianii attacking a member of Cymbidieae and the first on a species of the genus Catasetum. References Cummins GB, Hiratsuka Y, 1983. Illustrated Genera of Rust Fungi. St Paul, MN, USA: The American Phytopathological Society Press. Google Scholar Hennen JF, Hennen MM, Figueiredo MB, 1982. Índice das Ferrugens (Uredinales) Do Brasil. São Paulo: Instituto Biológico de São Paulo. Google Scholar Linder DH, 1944. A new rust of orchids. Mycologia 36, 464– 8. CrossrefGoogle Scholar Pereira OL, Cavallazzi JRP, Rollemberg CL, Kasuya MCM, 2002. Sphenospora kevorkianii, a rust fungus (Uredinales: Raveneliaceae) on the orchid Pleurothallis mentigera. Brazilian Journal of Microbiology 33, 155– 6. CrossrefWeb of Science®Google Scholar Citing Literature Volume53, Issue2April 2004Pages 256-256 ReferencesRelatedInformation