Phytoplasma
Mostrando 1-12 de 46 artigos, teses e dissertações.
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1. Molecular characterization of a phytoplasma associated with a commercial variety of Momordica charantia
ABSTRACT: Momordica charantia (bitter melon) presents two distinct types or varieties, known as wild type and commercial type. Plants of the wild type are hosts of a phytoplasma of the group 16SrIII-J, which is associated with a disease known as witches’ broom. However, this disease has not yet been reported in commercial bitter melon. Thus, symptomatic pl
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-05
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2. Sesame phyllody associated with a 16SrI-B phytoplasma, a ‘Candidatus Phytoplasma asteris’-related strain, in Paraguay
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 D
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-02
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3. Interceptação de ‘Candidatus Phytoplasma solani’ no Brasil em material propagativo de macieira importado da França
RESUMO: Plantas de macieira originárias da França introduzidas no Brasil para fins de pesquisa foram submetidas à análise no Laboratório de Quarentena Vegetal da Embrapa Recursos Genéticos e Biotecnologia (Cenargen). Após realizar a enxertia em porta-enxertos sadios, algumas plantas apresentaram sintomas típicos de infecção por fitoplasmas. Os test
Arq. Inst. Biol.. Publicado em: 01/02/2018
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4. Analyses of the 16S-23S intergenic region of the phytoplasma causing the sugarcane white leaf disease in Yunnan Province, China
Sugarcane white leaf (SCWL) is an important disease caused by a phytoplasma. In Baoshan, Yunnan, China, SCWL was firstly observed in 2012, and has extended its area of occurrence to 600 hm² . Up to 52% of the plants may become diseased in a field and even complete loss of cane yield may result in the heavily infected fields, posing a serious threat to Yunna
Trop. plant pathol.. Publicado em: 2014-04
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5. Bitter gourd little leaf disease associated to 'Candidatus Phytoplasma asteris'
Little leaf disease symptoms including dwarfed, thickened and puckered leaves and shortened internodes of bitter gourd (Momordica charantia L.) plants were observed in Meiktila, Myanmar 2012. The causal agent was detected by polymerase chain reaction using universal phytoplasma primers, and classified by sequencing of 16S rRNA gene, ribosomal protein (rp) ge
Trop. plant pathol.. Publicado em: 2014-02
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6. Identificação molecular de um fitoplasma do grupo 16Srl-B em plantas de soja / Molecular identification of a group 16SrI-B phytoplasma in soybean plants
Plantas apresentando folhas com deformações do tipo bolhas, menor quantidade de vagens de tamanho reduzido e contendo menor número de sementes, vagens que não completaram a maturação e coloração verde da parte aérea no final do ciclo foram observadas em campos de produção. As plantas foram analisadas visando à detecção de fitoplasmas e a sua id
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 19/01/2012
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7. Detection and molecular characterization of cactus witches'-broom disease associated with a group 16SrII phytoplasma in northern areas of China
In July 2010, cacti with typical phytoplasma symptoms were observed in Yangling district, Shaanxi Province, China. Based on amplification of 16S rRNA gene, phytoplasmas were detected by polymerase chain reaction (PCR) driven with universal primer pairs P1/ P7, followed by a nested PCR with universal primer pairs R16F2n/R16R2. Fragments of expected sizes (1.8
Tropical Plant Pathology. Publicado em: 2012-06
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8. Caracterização molecular de um fitoplasma do grupo 16SrIX relacionado ao 'Ca. Phytoplasma phoenicium' em vinca no Brasil
Fitoplasmas foram encontrados em vinca (Catharanthus roseus), uma planta tropical herbácea. Plantas exibindo sintomas de virescência, filodia e variegação foram coletadas nos estados de Minas Gerais e São Paulo. O fitoplasma foi transmitido por enxertia a partir de uma planta de vinca infectada para plantas sadias da mesma espécie, e por Cuscuta sp. pa
Tropical Plant Pathology. Publicado em: 2012-04
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9. 'Candidatus Phytoplasma cynodontis' associated with white leaf disease of golden beard grass (Chrysopogon acicalatus)
A phytoplasma was detected in golden beard grass (Chrysopogon acicalatus) displaying white leaf symptoms near vegetative fields at the Tatkone region in Myanmar, 2011. Based on restriction fragment length polymorphism analysis of PCR-amplified 16S rRNA genes, including the 16S-23S spacer region and part of the 23S rRNA gene, the phytoplasma was identified as
Tropical Plant Pathology. Publicado em: 2012-02
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10. Detection of 16SrII Group Phytoplasma in China Aster (Callistephus chinensis)
China aster, Callistephus chinensis, is widely grown in Myanmar as an ornamental plant. Symptoms of flower virescence were observed in diseased China aster plants in Yezin, Myanmar. The presence of a phytoplasma was detected and identified by applying Polymerase Chain Reaction (PCR)/ Restriction Fragment Length Polymorphism (RFLP) techniques and sequencing t
Tropical Plant Pathology. Publicado em: 2011-06
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11. Guazuma ulmifolia (Sterculiaceae), a new natural host of 16SrXV phytoplasma in Costa Rica
Guacimo trees (Guazuma ulmifolia, Sterculiaceae) showing witches' broom symptoms (GWB), small leaves, short internodes, stunting and no flower and fruit production were observed on side roads and fences in different areas of Costa Rica. The occurrence of phytoplasma infection in GWB trees was evaluated by transmission electron microscopy (TEM), and by molecu
Tropical Plant Pathology. Publicado em: 2011-04
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12. Praga Quarentenária A1*. "Apple proliferation Phytoplasma".
2007
Brasília. Publicado em: 2011