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Registros recuperados: 3
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Comparison of methodologies for conidia production by Alternaria alternata from citrus BJM
Carvalho,Daniel D. C.; Alves,Eduardo; Batista,Tereza R. S.; Camargos,Renato B.; Lopes,Eloísa A. G. L..
Conidia production is a problem in the study of Alternaria alternata from citrus. Thus, this study aimed to compare existing methodologies for conidial production of A. alternata isolated from Ponkan tangerine (2 isolates), Cravo lemon (1 isolate), Pêra orange (2 isolates) and Murcott tangor (1 isolate). The methodologies used were conidia production with 12 and 24 hours under white fluorescent light, evaluation with 24 and 48 hours after applying fungal mycelium stress technique, cold stress followed by injury of mycelium and evaluation with 24 hours, using healthy vegetable tissue and the use of black fluorescent near ultraviolet (NUV) lamp. Satisfactory result was obtained with A. alternata isolate from Murcott tangor, with the production of 2.8 x 10(5)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternaria brown spot; Mycelium stress technique; Murcott tangor; Ponkan tangerine; Black fluorescent NUV lamp.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400036
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Genetic variability of Brazilian isolates of Alternaria alternata detected by AFLP and RAPD techniques BJM
Dini-Andreote,Francisco; Pietrobon,Vivian Cristina; Andreote,Fernando Dini; Romão,Aline Silva; Spósito,Marcel Bellato; Araújo,Welington Luiz.
The Alternaria brown spot (ABS) is a disease caused in tangerine plants and its hybrids by the fungus Alternaria alternata f. sp. citri which has been found in Brazil since 2001. Due to the recent occurrence in Brazilian orchards, the epidemiology and genetic variability of this pathogen is still an issue to be addressed. Here it is presented a survey about the genetic variability of this fungus by the characterization of twenty four pathogenic isolates of A. alternata f. sp. citri from citrus plants and four endophytic isolates from mango (one Alternaria tenuissima and three Alternaria arborescens). The application of two molecular markers Random Amplified Polymorphic DNA (RAPD) and Amplified Fragment Length Polymorphism (AFLP) had revealed the isolates...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternaria brown spot; Molecular markers; Citrus plants; PCA analysis; Genetic variability.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300032
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Resistance and susceptibility of mandarins and their hybrids to Alternaria alternata Scientia Agricola
Pacheco,Camilla de Andrade; Martelli,Ivan Bortolato; Polydoro,Denis Augusto; Schinor,Evandro Henrique; Pio,Rose Mary; Kupper,Kátia Cristina; Azevedo,Fernando Alves de.
Caused by Alternaria alternata, Alternaria brown spot (ABS) is a major fungal disease of mandarins in Brazil, causing serious losses in commercial orchards of Ponkan tangerine (Citrus reticulata Blanco) and Murcott tangor [C. sinensis (L.) Osbeck × C. reticulata Blanco]. The response of 31 accessions/genotypes of mandarins and their hybrids to A. alternata, was evaluated in São Paulo state, Brazil. The incidence and severity of the disease in fruit were evaluated in the field, using diagrammatic scale, four times during 2008 and 2009. Based on these data, the area under the disease progress curve (AUDPC) was calculated. In parallel, in vivo and in vitro inoculations with A. alternata were made on leaves to confirm field results. Resistance and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus spp.; Alternaria brown spot; Fungus.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162012000600007
Registros recuperados: 3
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