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	Provedor de dados Naturalis (4) Colegio de Postgraduados (2) Autor Crous, P.W. (3) Groenewald, J.Z. (3) Alonso Barrera, Berenice (2) Carnegie, A.J. (2) Hyde, K.D. (2) Summerell, B.A. (2) Wingfield, M.J. (2) Andjic, V. (1) Burgess, T.I. (1) Crous, R. Cheewangkoon: P.W. (1) Frank, J. (1) Hunter, G.C. (1) J.Z. Groenewald (1) Oertel, B. (1) P.A. Barber (1) Phengsintham, P. (1) Schroers, H.-J. (1) To-anan, C. (1) Mais... Palavra-chave Pseudocercospora (6) Mycosphaerella (3) Penidiella (3) Colletotrichum (2) Fitopatología (2) Infección latente (2) Maestría (2) Phaeophleospora (2) Phaeothecoidea (2) Readeriella (2) Sinergismo (2) Taxonomy (2) Teratosphaeria (2) Virus (2) Zasmidium (2) Cibiessia (1) Colletogloeum (1) Devriesia (1) Dissoconium (1) Eucalyptus (1) Mais... Tipo do documento Article / Letter to the editor (4) Ano 2011 (2) 2010 (1) 2009 (2) 2008 (1) País Netherlands (4) Mexico (2) Idioma Espanhol (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 6 Primeira ... 1 ... Última Etiología de un síndrome fungoso y viral en cladodios de nopal verdura (Opuntia ficus-indica). Colegio de Postgraduados Alonso Barrera, Berenice. El cultivo de nopal (Opuntia ficus-indica) presenta diversas enfermedades de importancia económica asociadas a hongos y virus. Los objetivos de esta investigación fueron: a) detectar la ocurrencia de infecciones latentes del agente causal de la mancha negra, Pseudocercospora opuntiae (Po), mediante estudios histológicos y evaluar la implicación sinergética de Colletotrichum sp. (C) en la infección de P.opuntiae, y b) demostrar la naturaleza etiológica viral asociada a manchas cloróticas anulares en nopal. Con respecto al primer objetivo se evaluaron 31200 cortes histológicos provenientes de 78 cladodios sintomáticos colectados en siete fechas de muestreo comprendido en el periodo, junio-agosto, caracterizado por alta incidencia de mancha negra.... Palavras-chave: Pseudocercospora; Colletotrichum; Virus; Infección latente; Sinergismo; Maestría; Fitopatología. Ano: 2011 URL: http://hdl.handle.net/10521/525 Etiología de un síndrome fungoso y viral en cladodios de nopal verdura (Opuntia ficus-indica). Colegio de Postgraduados Alonso Barrera, Berenice. El cultivo de nopal (Opuntia ficus-indica) presenta diversas enfermedades de importancia económica asociadas a hongos y virus. Los objetivos de esta investigación fueron: a) detectar la ocurrencia de infecciones latentes del agente causal de la mancha negra, Pseudocercospora opuntiae (Po), mediante estudios histológicos y evaluar la implicación sinergética de Colletotrichum sp. (C) en la infección de P.opuntiae, y b) demostrar la naturaleza etiológica viral asociada a manchas cloróticas anulares en nopal. Con respecto al primer objetivo se evaluaron 31200 cortes histológicos provenientes de 78 cladodios sintomáticos colectados en siete fechas de muestreo comprendido en el periodo, junio-agosto, caracterizado por alta incidencia de mancha negra.... Palavras-chave: Pseudocercospora; Colletotrichum; Virus; Infección latente; Sinergismo; Maestría; Fitopatología. Ano: 2011 URL: http://hdl.handle.net/10521/525 Species of Mycosphaerella and related anamorphs on Eucalyptus leaves from Thailand Naturalis Crous, R. Cheewangkoon: P.W.; Hyde, K.D.; Groenewald, J.Z.; To-anan, C.. Species of Mycosphaerella and their related anamorphs represent potentially serious foliar pathogens of Eucalyptus. The fungi treated in the present study were isolated from symptomatic Eucalyptus leaves collected in Thailand during June –October 2007. Species were initially identified based on morphological and cultural characteristics. Identifications were confirmed using comparisons of DNA sequence data of the internal transcribed spacers (ITS1, 5.8S nrDNA, ITS2) and the 28S nrDNA (LSU) regions. To help distinguish species of Pseudocercospora, the dataset was expanded by generating partial sequences of the translation elongation factor 1-α and actin genes. By integrating the morphological and molecular datasets, five new taxa were distinguished, namely... Tipo: Article / Letter to the editor Palavras-chave: Eucalyptus; Mycosphaerella; Mycosphaerella leaf disease; Penidiella; Pseudocercospora; Taxonomy. Ano: 2008 URL: http://www.repository.naturalis.nl/record/532327 Novel species of Mycosphaerellaceae and Teratosphaeriaceae Naturalis Crous, P.W.; Summerell, B.A.; Carnegie, A.J.; Wingfield, M.J.; Groenewald, J.Z.. Recent phylogenetic studies based on multi-gene data have provided compelling evidence that the Mycosphaerellaceae and Teratosphaeriaceae represent numerous genera, many of which can be distinguished based on their anamorph morphology. The present study represents the second contribution in a series describing several novel species in different capnodealean genera defined in a previous study. Novelties on Eucalyptus from Australia include: Penidiella pseudotasmaniensis, P. tenuiramis, Phaeothecoidea intermedia, P. minutispora, Pseudocercospora tereticornis, Readeriella angustia, R. eucalyptigena, R. menaiensis, R. pseudocallista, R. tasmanica, Teratosphaeria alboconidia, T. complicata, T. majorizuluensis, T. miniata, T. profusa, Zasmidium aerohyalinosporum... Tipo: Article / Letter to the editor Palavras-chave: Mycosphaerella; Penidiella; Phaeophleospora; Phaeothecoidea; Pseudocercospora; Readeriella; Teratosphaeria; Zasmidium. Ano: 2009 URL: http://www.repository.naturalis.nl/record/532086 Unravelling Mycosphaerella: do you believe in genera? Naturalis Crous, P.W.; Summerell, B.A.; Carnegie, A.J.; Wingfield, M.J.; Hunter, G.C.; Burgess, T.I.; Andjic, V.; P.A. Barber; J.Z. Groenewald. Many fungal genera have been defined based on single characters considered to be informative at the generic level. In addition, many unrelated taxa have been aggregated in genera because they shared apparently similar morphological characters arising from adaptation to similar niches and convergent evolution. This problem is aptly illustrated in Mycosphaerella. In its broadest definition, this genus of mainly leaf infecting fungi incorporates more than 30 form genera that share similar phenotypic characters mostly associated with structures produced on plant tissue or in culture. DNA sequence data derived from the LSU gene in the present study distinguish several clades and families in what has hitherto been considered to represent the Mycosphaerellaceae.... Tipo: Article / Letter to the editor Palavras-chave: Cibiessia; Colletogloeum; Dissoconium; Kirramyces; Mycosphaerella; Passalora; Penidiella; Phaeophleospora; Phaeothecoidea; Pseudocercospora; Ramularia; Readeriella; Stenella; Teratosphaeria; Zasmidium. Ano: 2009 URL: http://www.repository.naturalis.nl/record/531971 Microcyclospora and Microcyclosporella: novel genera accommodating epiphytic fungi causing sooty blotch on apple Naturalis Frank, J.; Crous, P.W.; Groenewald, J.Z.; Oertel, B.; Hyde, K.D.; Phengsintham, P.; Schroers, H.-J.. Recent studies have found a wide range of ascomycetes to be associated with sooty blotch and flyspeck (SBFS) blemishes on the surfaces of pomaceous fruits, specifically apples. Based on collections of such fungi from apple orchards in Germany and Slovenia we introduce two novel genera according to analyses of morphological characters and nuclear ribosomal DNA sequences (large subunit and internal transcribed spacer regions). Microcyclosporella is represented by a single species, M. mali, and is presently known from Germany and Slovenia. Microcyclosporella is Pseudocercosporella-like in morphology, but genetically and morphologically distinct from Pseudocercosporella s.str., for which an epitype is designated based on a fresh collection of P. bakeri from... Tipo: Article / Letter to the editor Palavras-chave: Devriesia; Hyphomycetes; Malus; Microfungi; Pseudocercospora; Pseudocercosporella; SBFS; Taxonomy. Ano: 2010 URL: http://www.repository.naturalis.nl/record/532077 Registros recuperados: 6 Primeira ... 1 ... Última

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