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Master's Dissertation
DOI
https://doi.org/10.11606/D.11.2016.tde-02022016-155536
Document
Author
Full name
Perla Novais de Oliveira
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
Piracicaba, 2015
Supervisor
Committee
Mourão Filho, Francisco de Assis Alves (President)
Harakava, Ricardo
Peres, Lazaro Eustaquio Pereira
Title in Portuguese
Transformação genética de tomate 'Micro-Tom' com o gene enhanced disease susceptibility 5 (EDS5) isolado de Citrus sinensis
Keywords in Portuguese
Citros
HLB
Planta modelo
Resistência sistêmica adquirida
Abstract in Portuguese
Nos anos recentes, a atividade agrícola da citricultura vem enfrentando grandes problemas fitossanitários, principalmente, com relação à viabilidade econômica decorrente do controle das doenças. A bactéria Candidatus Liberibacter spp. está associada ao HLB, a principal doença que limita a produção das plantas cítricas. Assim, muitos pesquisadores têm voltado suas atenções para estudarem e encontrarem genes-alvo na resposta do hospedeiro a este patógeno para utilização no melhoramento genético. Nesse sentido, métodos de transformação genética das plantas cítricas são essenciais, porém características inerentes à espécie limitam seu cultivo in vitro e requerem um maior tempo para crescimento e propagação. Com isso, torna-se importante o estudo em plantas modelo, principalmente, para seguir protocolos de validação de genes. De acordo com o exposto, o gene EDS5 isolado de Citrus sinensis, associado ao mecanismo de Resistência Sistêmica Adquirida (SAR) foi superexpresso por meio da transformação genética em tomateiro (Solanum lycopersicum L. Micro-Tom). Após o crescimento dos brotos regenerados, foram identificadas as plantas positivas por meio de análise de GUS e PCR. Linhagens transgênicas homozigotas foram obtidas com avaliação da resistência ao antibiótico canamicina.
Title in English
Genetic transformation of 'Micro-Tom' tomato with enhanced disease susceptibility 5 gene (EDS5) isolated from Citrus sinensis
Keywords in English
Citrus
HLB
Model plant
Systemic acquired resistance
Abstract in English
In the recent years, the agricultural activity of the citrus industry has been facing big phytosanitary problems, mainly with regard to economic viability arising from disease control. The bacterium Candidatus Liberibacter spp. is associated with HLB, the main disease that limits the production of citrus trees. Thus, many researchers have been returning their attentions to study and find target genes in the host response to this pathogen for use in the genetic improvement. In this way, methods of genetic transformation of citrus plants are essential, but the inherent characteristics of the species border your in vitro cultivation and require a longer time for growth and propagation. Therefore, it is important to study of model plants, mainly for genetic validation protocols. Thus, the EDS5 gene isolated from Citrus sinensis, associated with Systemic Acquired Resistance mechanism (SAR) was overexpressed by genetic transformation in tomato (Solanum lycopersicum L. Micro-Tom). After the growth of regenerated shoots, positive plants were identified by PCR and GUS analysis. Homozygous transgenic lines were obtained with evaluation of resistance to kanamycin.
 
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Publishing Date
2016-03-16
 
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