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Mechanism analysis of broad-spectrum disease resistance induced by expression of anti-apoptotic p35 gene in tobacco / 生物工程学报
Chinese Journal of Biotechnology ; (12): 1707-1713, 2008.
Artigo em Inglês | WPRIM | ID: wpr-275351
ABSTRACT
Studies have shown that transgenic plants expressing antiapoptotic genes from baculovirus and animals increase resistance to biotic and abiotic stress. However, the mechanism under these resistances is conjectural, or in some cases even controversy. In the present study, the p35 gene from baculovirus Autographa californica multicapsid nucleopolyhedrovirus (AcMNPV) was expressed in tobacco, and for the first time P35 protein was detected in transgenic plants by Western blotting. Inoculation of T1 transgenic tobacco leaves with tobacco mosaic virus (TMV) showed enhanced resistance, and DNA laddering was observed after TMV infection in control but not in transgenic plants. DAB staining showed that TMV infection did not affect peroxide induction of transgenic plants, Western blotting analysis of PR1 protein also showed no difference of control and transgenic plants. Inoculation of fungus (Sclerotinia sclerotiorum) using a detached leaf assay showed enhanced resistance of transgenic leave tissue. RT-PCR analysis demonstrated that p35 gene expression induced earlier expression of PR1 gene after S. sclerotiorum infection. Taken together, our results suggest that the mechanism under enhanced disease resistance by P35 protein is possibly related to the activation of PR-related proteins in addition to the inhibition of programmed cell death, depending on the pathogens challenged.
Assuntos
Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Doenças das Plantas / Nicotiana / Vírus do Mosaico do Tabaco / Transformação Genética / Proteínas Virais / Virologia / Plantas Geneticamente Modificadas / Regulação da Expressão Gênica de Plantas / Alergia e Imunologia / Genética Idioma: Inglês Revista: Chinese Journal of Biotechnology Ano de publicação: 2008 Tipo de documento: Artigo

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Texto completo: DisponíveL Índice: WPRIM (Pacífico Ocidental) Assunto principal: Doenças das Plantas / Nicotiana / Vírus do Mosaico do Tabaco / Transformação Genética / Proteínas Virais / Virologia / Plantas Geneticamente Modificadas / Regulação da Expressão Gênica de Plantas / Alergia e Imunologia / Genética Idioma: Inglês Revista: Chinese Journal of Biotechnology Ano de publicação: 2008 Tipo de documento: Artigo