Genes associated with hypersensitive response (HR) in the citrus EST database (CitEST)

Autor(es)

Simone Guidetti-Gonzalez ^[1] ; Juliana Freitas-Astúa ; Alexandre Morais do Amaral ; Natália F. Martins ^[4] ; Angela Mehta ^[5] ; Marilia Santos Silva ^[6] ; Helaine Carrer ^[7]

Afiliação do(s) autor(es)

^[1] Universidade de São Paulo. Escola Superior Luis de Queiróz. Departamento de Ciências Biológicas - Brasil

^[4] Embrapa Recursos Genéticos e Biotecnologia - Brasil

^[5] Embrapa Recursos Genéticos e Biotecnologia - Brasil

^[6] Embrapa Cerrados - Brasil

^[7] Universidade de São Paulo. Escola Superior Luis de Queiróz. Departamento de Ciências Biológicas - Brasil

• Tipo de documento: Artigo Científico
• Fonte: GENETICS AND MOLECULAR BIOLOGY; v. 30, n. 3, p. 943-956, 2007-00-00.

Resumo

Plants are continuously exposed to pathogen attack, but successful infection is rare because they protect themselves against pathogens using a wide range of response mechanisms. One of them is the hypersensitive response (HR), which is a form of cell death often associated with plant resistance to pathogen infection to prevent the [e-mail] [e-mail] of the potential pathogen from infected to uninfected tissues. Cell death is activated by recognition of pathogen-derived molecules by the resistance (R) gene products, and is associated with the massive accumulation of reactive oxygen species (ROS), salicylic acid (SA), and other pro-death signals such as nitric oxide (NO). The analysis of the citrus EST (CitEST) database revealed the presence of putative genes likely to be involved in HR through their products, like metacaspases, lipoxygenases, phospholipases, pathogenesis-related proteins, glutathione transferases/peroxidases, enzymes involved in the phenylpropanoid pathway and in the formation and detoxification of ROS, as well as those involved in the formation and regulation of ion channels, SA and NO. By analysis of the EST database of Citrus, it was possible to identify several putative genes that code for key enzymes involved in HR triggering and also in plant defense against biotic and abiotic stress. (AU)

• Processo FAPESP: 05/58117-4 - Identificação e análise de expressão de genes de citros relacionados à mancha preta de citros
• Beneficiário: Simone Guidetti Gonzalez
• Modalidade de apoio: Bolsas no Brasil - Doutorado