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| Marques,Eder; Borges,Rafaela CF; Uesugi,Carlos H. |
| ABSTRACT: In 2013, leaf samples of gerbera plants showing symptoms of bacterial blight were collected in cut-flower high tunnels, in the settlement of núcleo rural alexandre gusmão, located in brazlândia, distrito federal, brazil. seven isolates obtained were subjected to phenotypic and molecular characterization, including pathogenicity tests, lopat, and partial sequencing of the 16s rdna gene. all isolates were gram-negative, aerobic, oxidase-positive, produced fluorescent pigment, induced hypersensitivity in tobacco leaves, used sorbitol and glutamate and were pathogenic to 24 different plant species. results of these tests and analysis of the sequences of rdna showed 100% identity with pseudomonas cichorii. to our knowledge, this is the first report of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gerbera jamesonii; Leaf spot; LOPAT.. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362016000200244 |
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| Marques,Eder; Martins,Irene; Cunha,Mariana de Oliveira Cardoso; Lima,Marcello Arrais; Silva,João Batista Tavares da; Silva,Joseane Padilha da; Inglis,Peter Ward; Mello,Sueli Correa Marques. |
| Abstract Forty-nine isolates of Trichoderma from the Brazilian Midwest were evaluated for their antagonistic activity in vitro against Sclerotinia sclerotiorum (causal agent of white mold), which were then identified based on their nuclear ribosomal ITS sequences. Paired culture tests showed that all isolates exhibited some antagonism, with a maximum of 77% mycelial inhibition and complete inhibition of sclerotia production. Two isolates were found to be the most promising biocontrol agents, considering both antagonistic parameters (CEN1253 - T. koningiopsis and CEN1265 - T. brevicompactum). Five different species were identified: T. harzianum (23), T. spirale (9), T. koningiopsis (8), T. brevicompactum (7) and T. asperellum (2). These isolates are stored... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Microbial genetic resources; Molecular identification; Biocontrol; White mold. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032016000300209 |
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| Marques,Eder; Uesugi,Carlos Hidemi; Blum,Luiz Eduardo Bassay. |
| A murcha bacteriana do eucalipto (Raça 3 biovar 2T de Ralstonia solanacearum) foi descrita em 2009 em campo com o híbrido de eucalipto urograndis. O objetivo deste trabalho foi avaliar a virulência de duas estirpes de R. solanacearum a dezessete espécies de Eucalyptus, através do teste de microbiolização de sementes. A análise estatística dentre espécies mostrou que a virulência variou entre as estirpes estudadas. A virulência da R3bv2T foi significativamente maior em: urograndis, E. urophylla, E. grandis x E. camaldulensis, E. grandis, E. microcorys, E. deanei e E. phaeotricha; e maior para R1bv1 somente na espécie E. pellita. Entre espécies de eucalipto, observou-se maior suscetibilidade em "urograndis", E. grandis e E. paniculata para R3bv2T; e em E.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Murcha bacteriana; Microbiolização de sementes; Suscetibilidade. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782013001100005 |
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