Navegando por Autor "Ferreira, Bruno Wesley"
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Item Pseudocercospora lonicerigena a leaf spot fungus on the invasive weed Lonicera japonica in Brazil(Australasian Plant Pathology, 2014-05) Miranda, Bruno E. C. de; Ferreira, Bruno Wesley; Alves, Janaína L.; Macedo, Davi M. de; Barreto, Robert W.Lonicera japonica (Japanese honeysuckle), a plant of Asian origin introduced as an ornamental into many countries, has become an invasive weed in some exotic situations, such as in southern Brazil. Classical biological control (CBC) with natural enemies collected in the centre of origin is considered to be the best alternative for sustainable management of L. japonica. In the context of this strategy, previous knowledge of the natural enemies already present in the target area is of great importance in order to avoid un-necessary introductions of CBC agents from the weed’s native range. Recently, examination of populations of L. japonica in localities in the Brazilian states of Rio de Janeiro and Paraná revealed the presence of leaf spots consistently associated with a cercosporoid hyphomycete. A molecular and morphological study of this fungus led to its recognition as Pseudocercospora lonicerigena. There were few differences when the Brazilian isolate was compared with a strain found in North America. This is the first report of this fungus in Brazil. The fungus was isolated in pure culture and inoculation of healthy leaves of L. japonica eventually led to leaf yellowing and necrosis, indicating that P. lonicerigena is not highly pathogenic, as evidenced by the continuing advance of this weed in southern Brazil. Therefore, the introduction of additional co-evolved natural enemies collected in Asia, perhaps piggy-backing on an ongoing project already underway in New Zealand, will be necessary to control this invasive alien weed in Brazil.Item Taxonomic placement of selected plant pathogenic fungi revisited: Acroconidiella, Ceratobasidium lantanae-camarae, Duosporium, Korunomyces and Perisporiopsidaceae(Universidade Federal de Viçosa, 2021-03-19) Ferreira, Bruno Wesley; Barreto, Robert Weingart; http://lattes.cnpq.br/1454623527292037Since the early days of mycology, the classification of fungi has been based mainly on morphological characters, with substrate, geographical distribution, chemotaxonomic or ecological information playing a complementary role for some groups. This, sometimes, resulted in provisional or dubious sytems of classification and to incorrectly assumed affinities and mistaken application of names to fungal taxa. With the advent of molecular biology and its incorporation in the polyphasic approach for the taxonomy of fungi, it became progressively possible to better elucidate the relationships between members of the Kingdom Fungi and to erect a more reliable and natural system of classification of these organisms. A taxonomic reassessment of selected taxa of plant pathogenic fungi, ranging from species to families, was conducted based on specimens recollected in Brazil. Obtaining pure cultures of these fungi allowed for extraction and sequencing of DNA regions and to address the key issue of the phylogenetic affinities and correct application of names for those fungi. Among the specimens recollected during this study some were selected and indicated as neotypes or epitypes for taxa which were erected in the past. The reexamination of morphological features was carried out, as well as the obtaining of molecular information, enabled, for the first time, the application of the polyphasic approach to these taxa. As a result, the following taxa were “debunked”: family Perisporiopsidaceae (considered a synonym of Phaeosphaeriaceae); the genera Acroconidiella (found to be a late synonym of Alternaria), Duosporium (syn. of Curvularia) and Korunomyces (syn. of Coniella). Ceratobasidium lantanae-camarae, was found to be distinct from C. cornigerum – to which it was mistakenly synonymized – and reinstated. Taxonomic novelties were treated, as determined by the present nomenclatural rules, for publication. Keywords: Phylogeny. Fungi. Taxonomy.