Citrus Exocortis
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Viróides em citros no Estado do Rio de Janeiro
RESUMO Os viróides infectam plantas de grande importância econômica como os citros. Objetivando detectar a presença de viróides através de métodos moleculares em árvores cítricas, cinco propriedades em Araruama, no Estado do Rio de Janeiro foram avaliadas. Vinte e duas amostras foram coletadas a partir de plantas com nanismo, rachadura no tronco e e
Summa phytopathol.. Publicado em: 2020-06
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2. Identification and characterization of viroids in 'Navelina ISA 315' sweet orange
To date, seven species of viroids have been described infecting Citrus. However, only Citrus exocortis viroid (CEVd), Hop stunt viroid (HSVd) and Citrus dwarfing viroid (CDVd) have been reported in this crop in Brazil. The aim of our work was to identify and characterize viroids infecting plants of 'Navelina ISA 315' sweet orange cultivar grafted on 'Rangpur
Trop. plant pathol.. Publicado em: 2013-02
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3. Viroids in Tahiti lime scions showing back cracking symptoms.
The so-called "quebra-galho" clone of Tahiti lime is very popular in Brazil, because the small size of the trees is suitable for high-density plantings. These Tahiti lime trees are easily recognized because they show bark-cracking symptoms, that have been claimed to be associated with "exocortis" infection. Viroid infection of three "quebra-galho" Tahiti lim
CONFERENCE OF THE INTERNATIONAL ORGANIZATION OF CITRUS VIROLOGISTS. Publicado em: 2011
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4. Espécies de viróides associadas a caneluras nos ramos em limeira ácida 'Tahiti' no Estado de São Paulo, Brasil
Os viroides têm sido empregados em diversos países como agentes indutores de nanismo transmissíveis por enxertia ("graft transmissible dwarfing agents", GTDA), principalmente visando à diminuição do porte das plantas, o que permite o adensamento do pomar. No Estado de São Paulo, Brasil, plantas de limeira ácida 'Tahiti' são normalmente enxertadas co
Tropical Plant Pathology. Publicado em: 2010
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5. Viroides em citros
Os viroides são os menores fitopatógenos conhecidos. Constituídos por uma molécula de RNA de fita simples, circular, que não é encapsidada e não codifica proteínas, são capazes de se replicar de maneira autônoma nas células do hospedeiro. Os viroides de citros pertencem à família Pospiviroidae (cujos membros apresentam uma região central conser
Tropical Plant Pathology. Publicado em: 2009-10
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6. Videiras duplamente infectadas pelo Citrus exocortis viroid e Hop stunt viroid no Brasil
Os viróides são os menores fitopatógenos conhecidos, sendo constituídos de uma molécula de RNA fita simples, circular, com forte estrutura secundária. Possuem genomas que variam entre 246 e 401 nucleotídeos e, por não traduzirem proteínas próprias, são totalmente dependentes da célula hospedeira para sua replicação. São classificados em duas f
Fitopatologia Brasileira. Publicado em: 2006-10
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7. Sequence analysis of three citrus viroids infecting a single Tunisian citrus tree (Citrus, reticulata, Clementine)
We report the nucleotide sequences of three citrus viroids belonging to three different genera: Citrus exocortis viroid (CEVd), Hop stunt viroid (HSVd) and Citrus viroid-III (CVd-III) isolated from a single natural infected Citrus reticulata var. Clementine tree growing in a tree nursery in Manouba (near Tunis Capital). We describe the sequence variability o
Genetics and Molecular Biology. Publicado em: 2006
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8. Identificação e caracterização de viróides e estudo de alguns aspectos da interação de viróides com proteínas do hospedeiro / Identification and characterization of viroids and study of some viroid-host protein interactions
The present work has been divided into four chapters to: (i) review the main points in viroid-host interactions and present different aspects in the evolutionary relationship of the viroids and virusoids; (ii) identify and characterize viroids infecting grapevine in Brazil; (iii) purify, clone and sequence what appears to be a novel citrus viroid; (iv) study
Publicado em: 2006
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9. Eliminação de vírus do complexo sorose dos citros por microenxertia associada a termoterapia
A microenxertia de ápices caulinares tem sido utilizada com 100% de sucesso na eliminação do vírus da tristeza (Citrus tristeza virus) e dos viróides da exocorte (Citrus exocortis viroid - CEVd) e cachexia-xiloporose de materiais do Banco Ativo de Germoplasma de Citros do Centro de Citricultura Sylvio Moreira CCSM-IAC. Para o complexo da sorose, entreta
Fitopatologia Brasileira. Publicado em: 2002-06
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10. RNA sequences complementary to citrus exocortis viroid in nucleic acid preparations from infected Gynura aurantiaca
Molecular hybridization with 125I-labeled citrus exocortis viroid RNA has been used to survey nucleic acid preparations from Gynura aurantiaca for viroid complementary molecules. A differential hybridization effect was detected between nucleic acid extracts from healthy and infected tissue in which significant RNase-resistant 125I-labeled citrus exocortis vi
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11. Potato spindle tuber and citrus exocortis viroids undergo no major sequence changes during replication in two different hosts
Potato spindle tuber viroid and citrus exocortis viroid, each purified from tomato (Lycopersicon esculentum) and from Gynura aurantiaca, were iodinated in vitro with 125I, digested with ribonuclease T1, and subjected to two-dimensional RNA fingerprinting analysis. With the exception of minor variations, each viroid retained its distinctive fingerprint patter
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12. Properties of a cell-free system for synthesis of citrus exocortis viroid
Partially purified nuclei from citrus exocortis viroid (CEV)-infected Gynura aurantiaca are able to synthesize linear and circular viroid molecules. Pretreatment of the nuclei with actinomycin D or deoxyribonuclease did not affect viroid synthesis, whereas the synthesis of other cellular RNAs was severely reduced. These observations support the essential rol