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Breakdown of resistance in sweet pepper against Pepper yellow mosaic virus in Brazil Scientia Agricola
Gioria,Ricardo; Braga,Renato de Souza; Krause-Sakate,Renate; Roullier,Caroline; Rosa,Daniel Dias; Moura,Monika Fecury; Souza-Dias,José Alberto Caram de; Sawazaki,Haiko Enok; Camargo,Luis Eduardo Aranha; Rezende,Jorge Alberto Marques.
Plants of Capsicum annuum cv. Magali R, resistant to Pepper yellow mosaic virus (PepYMV), which showed severe yellow mosaic, leaf malformation and stunting were observed during the 2003/04 growing season in Lins, São Paulo State, Brazil. Potyvirus-like particles observed in leaf sap from infected plants under the electron microscope reacted with an antiserum against PepYMV in PTA-ELISA. In addition to C. annuum cv. Magali R, this potyvirus also infected systemically the resistant C. annuum cv. Rubia R. The nucleotide sequence of part of the CP gene of this potyvirus shared 96-98% identity with that of other PepYMV isolates. The partial nucleotide sequence of the 3' NTR showed 94-96% identity with that of PepYMV. These data indicate that this potyvirus is a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Potyvirus; RT-PCR; ELISA; Resistance gene.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000200017
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Efeitos na fotossíntese e área foliar de cultivares de alface inoculadas mecanicamente com patótipos do Lettuce mosaic virus e Lettuce mottle virus Trop. Plant Pathol.
Jadão,Adriana S; Pavan,Marcelo A; Krause-Sakate,Renate; Zerbini,F. Murilo.
Levantamentos realizados no estado de São Paulo indicaram a ocorrência isolada e em infecções mistas do Lettuce mosaic virus (LMV) e do Lettuce mottle virus (LeMoV) em plantas de alface (Lactuca sativa). O presente trabalho teve como objetivo estudar os efeitos da infecção isolada e mista entre o LMV (patótipos II e IV) e o LeMoV, em cultivares de alface suscetível (White Boston) e tolerante (Elisa - gene mol¹) ao LMV patótipo II. As plantas foram inoculadas via extrato vegetal tamponado com isolados de LMV-II, LMV-IV e LeMoV separadamente e em diferentes combinações, com intervalo de 24 h ou simultaneamente com os dois vírus. As plantas infetadas foram analisadas utilizando-se hospedeiras diferenciais para o LMV e o LeMoV, e no caso do LMV pelo teste...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Mosaico da alface; Mosqueado da alface; Lactuca sativa; Potyvirus.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582004000100002
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Efficient detection of Frankliniella schultzei (Thysanoptera, Thripidae) by cytochrome oxidase I gene (mtCOI) direct sequencing and real-time PCR BABT
Leão,Evelynne Urzêdo; Spadotti,David Marques de Almeida; Rocha,Kelly Cristina G.; Lima,Élison Fabricio B.; Tavella,Luciana; Turina,Massimo; Krause-Sakate,Renate.
ABSTRACT Identification of Thysanoptera is based mainly on external morphology examination that can be time-consuming and difficult for non taxonomic experts. In this work, we propose a rapid and efficient molecular method to identify Frankliniella schultzei, an important and widespread pest thrips vector of tospoviruses in South America countries. Species-specific primers designed in the mitochondrial cytochrome oxidase I gene (mtCOI) were optimized for detection by conventional PCR and real-time PCR. The primers were tested on immature and adult thrips collected from crops and weeds found in São Paulo State. All samples collected were identified as F. schultzei, indicating the high prevalence of this species as vector of tospoviruses in Brazilian fields.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Molecular identification; Real-time PCR; Tospovirus vector.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132017000100454
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First report of Tomato severe rugose virus infecting pepper plants in Brazil Trop. Plant Pathol.
Nozaki,Denise N.; Krause-Sakate,Renate; Hasegawa,Jorge M.; Cezar,Márcia A; Dziuba,Pedro H.; Pavan,Marcelo A..
Tipo: Info:eu-repo/semantics/report
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-41582006000300019
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Fungicide application can improve production of tomato coinfected with Begomovirus and Crinivirus PAB
Guimarães,Leysimar Ribeiro Pitzr; Nozaki,Denise Nakada; Moura,Mônika Fecury; Spadotti,David Marques de Almeida; Mituti,Tatiana; Krause-Sakate,Renate; Pavan,Marcelo Agenor.
Abstract: The objective of this work was to evaluate the effect of fungicide application on the concentration of Tomato severe rugose virus (ToSRV, Begomovirus) in the 'Mariana' hybrid tomato coinfected with ToSRV and Tomato chlorosis virus (ToCV, Crinivirus) and the progression of viral concentration by qPCR, as well as to quantify fruit yield and quality. Experiment I consisted in the application of fungicides after sowing (pretreatment): pyraclostrobin+metiram (P+M) (at 3 g L-1) + boscalid (B) (at 0.3 g L-1), followed by biweekly sprayings with P+M (4 g L-1); in experiment II, there was no application at sowing (control treatment), only 4 g L-1 P+M biweekly. ToSRV and ToCV transmissions were performed using sweetpotato whiteflies (Bemisia tabaci,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Solanum lycopersicum; Boscalid; Metiram; Pyraclostrobin; ToCV; ToSRV..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000600435
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Only the B biotype of Bemisia tabaci is present on vegetables in São Paulo State, Brazil Scientia Agricola
Rocha,Kelly Cristina Gonçales; Marubayashi,Julio Massaharu; Navas-Castillo,Jesús; Yuki,Valdir Atsushi; Wilcken,Carlos Frederico; Pavan,Marcelo Agenor; Krause-Sakate,Renate.
Bemisia tabaci (Genn.) is one of the most important pests in cultivated areas of vegetables and ornamental crops around the world. Based on the mitochondrial cytochrome oxidize I (mtCOI) sequence, there is evidence that B. tabaci should be considered a cryptic species complex of 11 groups containing 24 species. Two of the groups, Middle East-Asia Minor 1 and Mediterranean include biotypes B and Q, respectively. In this study we evaluated the mtCOI sequence of B. tabaci populations collected in sites of the state of São Paulo, Brazil. Using PCR-RFLP with Taq I, a typical biotype B profile was obtained for all specimens. Based on the comparison with mtCOI reference sequences we found four haplotypes all belonging to the Middle East-Asia Minor 1. They...
Tipo: Info:eu-repo/semantics/article Palavras-chave: RFLP; Cytochrome oxidase I gene; Sequencing; Whiteflies.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000100018
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Reaction of lettuce genotypes to Lettuce mosaic virus-Most (LMV-Most) and characterization of the translation factor eIF4E PAB
Moura,Mônika Fecury; Silva,Norberto da; Hoffmann,Maria Isabel Motta; Pavan,Marcelo Agenor; Krause-Sakate,Renate.
Abstract: The objective of this work was to evaluate lettuce genotypes for their reaction to Lettuce mosaic virus (LMV; Most-type, isolate AF-199) and variations of the eukaryotic translation initiation factor eIF4E. All inoculated genotypes were susceptible to LMV, which was detected by RT-PCR using specific primer pairs. However, the accessions 169501, 169501C, 172918A, and 162499 showed late development of symptoms that appeared only on the inoculated leaves. Sequencing of the coding region of eIF4E showed that these genotypes have an eIF4E0 (mol 0 ) standard typical for their susceptibility to LMV, indicating that the phenotype found is not correlated to nucleotide variations in this translation factor.
Tipo: Info:eu-repo/semantics/article Palavras-chave: EIF4E; Potyvirus; Resistance.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100125
Registros recuperados: 7
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