Consulta: creatorFacets:"Kitajima,Elliot Watanabe"
Registros recuperados: 7
Data/hora: 08/06/2024 17:59:52

Lesões foliares e de ramos de laranjeira-doce causadas pela leprose-dos-citros
Provedor de dados: 86
Autores: Marques,João Paulo Rodrigues; Freitas-Astúa,Juliana de; Kitajima,Elliot Watanabe; Appezzato-da-Glória,Beatriz.
O objetivo deste trabalho foi apresentar a descrição anatômica dos tecidos lesionados pelo Citrus leprosis virus do tipo citoplasmático (CiLV-C), em ramos e folhas de laranjeira-doce (Citrus sinensis (L.) Osbeck) 'Pêra', e fornecer dados para a compreensão das interações entre o vírus e a planta hospedeira. Tecidos que apresentavam lesões foram seccionados em micrótomo rotativo (5-7 µm de espessura) e, posteriormente, as lâminas foram coradas e montadas em resina sintética. Nas análises realizadas no microscópio eletrônico de varredura, as amostras, depois de fixadas, foram imersas em glicerina 30% e, em seguida, criofraturadas, desidratadas em série etílica, secadas ao ponto crítico de CO2, e cobertas com uma delgada camada de ouro. As lesões foliares se...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrus sinensis; Citrus leprosis virus; Histopatologia; Ductos gomosos traumáticos.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007001100003

Chlorotic spots on Clerodendrum, a disease caused by a nuclear type of Brevipalpus (Acari:Tenuipalpidae) transmitted virus
Provedor de dados: 63
Autores: Kitajima,Elliot Watanabe; Kubo,Karen Sumire; Ferreira,Paulo de Tarso Oliveira; Alcântara,Berenice Kussumoto de; Boari,Alessandra Jesus; Gomes,Renata Takassugi; Freitas-Astua,Juliana; Rezende,Jorge Alberto Marques; Morais,Gilberto José de; Salaroli,Renato Barbosa.
Chlorotic spots have been observed in plants of Clerodendrum x speciosum growing in residential gardens and parks in Piracicaba, SP, Brazil. Thin sections of diseased tissues revealed characteristic cytopathic effects of the nuclear type of the Brevipalpus (Acari: Tenuipalpidae) mite-transmitted viruses (BTrV). Brevipalpus mites, identified as B. phoenicis, infesting symptomatic C. x speciosum plants transmitted the pathogen to healthy C. x speciosum and to C. thomsonae, Gomphrena globosa, Hibiscus cannabinus, H. coccineus, H. schizopetalus, Salvia leucantha, Spathiphyllum wallasi and Tetragonia expansa causing chlorotic spots on their leaves. Mechanical inoculation using leaf extracts from infected C. x speciosum resulted in chlorotic spots on inoculated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brevipalpus phoenicis; Clerodendrum x speciosum; Host range; Transmission; Purification.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162008000100006

Natural infection of several Coffea species and hybrids and Psilanthus ebracteolatus by the coffee ringspot virus (CoRSV)
Provedor de dados: 63
Autores: Kitajima,Elliot Watanabe; Chagas,César Martins; Braghini,Masako Toma; Fazuoli,Luiz Carlos; Locali-Fabris,Eliane Cristina; Salaroli,Renato Barbosa.
Coffee ringspot is a minor coffee disease caused by the nuclear type of Brevipalpus mite-transmitted virus, Coffee ringspot virus (CoRSV). Recently outbreaks of the disease in some growing regions of the state of Minas Gerais, Brazil, were registered with qualitative and quantitative yield losses. Coffea arabica was the only species registered as natural host. A survey was made on a germplasm collection of Coffea and related species kept at the Centro de Café "Alcides Carvalho", Instituto Agronômico, Campinas, state of São Paulo (SP), Brazil, to assess natural susceptibility of Coffee species, other than C. arabica and some interspecific hybrids of Coffea as well as other non-Coffea plant species to the Coffee ringspot virus (CoRSV). The following plants...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Coffea arabica; C. kapakata; C. racemosa; C. dewevrei; Híbrido de Timor.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000400017

Sesame phyllody associated with a 16SrI-B phytoplasma, a ‘Candidatus Phytoplasma asteris’-related strain, in Paraguay
Provedor de dados: 63
Autores: Ganem Junior,Evandro de Jesus; Segnana,Luis Gonzalez; Kitajima,Elliot Watanabe; Bedendo,Ivan Paulo.
ABSTRACT: Sesame (Sesamum indicum L.) plants exhibiting symptoms of phyllody disease were observed in commercial fields in Paraguay. The symptoms were indicative of infection by phytoplasmas. Thus, the present study investigated the association between affected plants and phytoplasma, which was later analyzed using molecular and phylogenetic methods. Total DNA was extracted from symptomatic and asymptomatic plants and used in nested PCR assays using primers R16SN910601/R16SN011119 and R16F2n/16R2. Amplified products of 1.2 Kb revealed the presence of phytoplasma in all diseased plants, and electron microscopy confirmed the presence of phytoplasmas within phloem vessels. Nucleotide sequences from sesame phytoplasma shared 99 % similarity with phytoplasmas...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sesamum indicum (L.); Mollicutes; Yellows; Phloem bacteria.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162019000100047

Characterization of a new potyvirus causing mosaic and flower variegation in Catharanthus roseus in Brazil
Provedor de dados: 63
Autores: Maciel,Sheila Conceição; Silva,Ricardo Ferreira da; Reis,Marcelo Silva; Jadão,Adriana Salomão; Rosa,Daniel Dias; Giampan,José Segundo; Kitajima,Elliot Watanabe; Rezende,Jorge Alberto Marques; Camargo,Luis Eduardo.
Catharanthus roseus is a perennial, evergreen herb in the family Apocynaceae, which is used as ornamental and for popular medicine to treat a wide assortment of human diseases. This paper describes a new potyvirus found causing mosaic symptom, foliar malformation and flower variegation in C. roseus. Of 28 test-plants inoculated mechanically with this potyvirus, only C. roseus and Nicotiana benthamiana developed systemic mosaic, whereas Chenopodium amaranticolor and C. quinoa exhibited chlorotic local lesions. The virus was transmitted by Aphis gossypii and Myzus nicotianae. When the nucleotide sequence of the CP gene (768nt) was compared with other members of the Potyviridae family, the highest identities varied from 67 to 76 %. For the 3' UTR (286nt),...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: RT-PCR; Apocynaceae; Periwinkle; Diagnose; Genome sequencing.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162011000600013

Arabidopsis thaliana as a model host for Brevipalpus mite-transmitted viruses
Provedor de dados: 63
Autores: Arena,Gabriella Dias; Ramos-González,Pedro Luis; Nunes,Maria Andréia; Jesus,Camila Chabi; Calegario,Renata Faier; Kitajima,Elliot Watanabe; Novelli,Valdenice Moreira; Freitas-Astúa,Juliana.
ABSTRACT: Brevipalpus-transmitted viruses (BTV) are a taxonomically diverse group of plant viruses which severely affect a number of major crops. Members of the group can be sub-classified into cytoplasmic (BTV-C) or nuclear type (BTV-N) according to the accumulation sites of virions in the infected plant cells. Both types of BTV produce only local infections near the point of inoculation by viruliferous mites. Features of BTV-plant interactions such as the failure of systemic spread in their natural hosts are poorly understood. In this study we evaluated Arabidopsis thaliana, a model plant commonly used for the study of plant-virus interactions, as an alternative host for BTV. Infection of Arabidopsis with the BTV-N Coffee ringspot virus and Clerodendrum...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Clerodendrum chlorotic spot virus; Cilevirus; Solanum violaefolium ringspot virus; Coffee ringspot virus; Dichorhavirus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000100085

An annotated list of ornamentals naturally found infected by Brevipalpus mite-transmitted viruses
Provedor de dados: 63
Autores: Kitajima,Elliot Watanabe; Rodrigues,José Carlos Verle; Freitas-Astua,Juliana.
The first cases of ornamental plants found infected by Brevipalpus transmitted viruses (BTV) were described in the 1990's from the region of Piracicaba, State of São Paulo, Brazil; subsequent cases were from other regions in the country and other American countries. Currently, 37 ornamental plant species (for the sake of simplicity, orchids being considered as a single species), belonging to 18 families of dicotyledons, have been reported hosting BTV. Because of the non systemic type of infection of these viruses, the localized diseases they cause are unimportant usually, but they have the potential to cause economic losses if severe outbreaks of Brevipalpus mite populations occur. Some ornamentals may serve as reservoirs to BTV known to cause serious...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Acari; Tenuipalpidae; Ornamental industry.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162010000300014