Developmental control of promoter activity is not responsible for mature onset of Cf-9B-mediated resistance to leaf mold in tomato.
Mol Plant Microbe Interact
; 15(11): 1099-107, 2002 Nov.
Article
en En
| MEDLINE
| ID: mdl-12423015
Cf-9 confers resistance to tomato seedlings and mature plants against Cladosporium fulvum races expressing the Avr9 elicitor. It is the central member of a cluster of five paralogous genes in an introgressed segment of chromosome 1 derived from Lycopersicon pimpinellifolium. The other four genes have been named Hcr9-9A, Hcr9-9B, Hcr9-9D, and Hcr9-9E. Hcr9-9B, here designated Cf-9B, encodes weaker resistance than Cf-9, recognizes a different elicitor, and protects only mature plants from infection. The onset of Cf-9B-mediated resistance and the molecular basis for its developmental control were investigated in this study. Fungal inoculation of tomato plants containing reciprocal Cf-9/Cf-9B promoter-coding region swaps, analysis of tomato plants containing promoter-gusA fusions, and a reverse transcriptase-polymerase chain reaction study of Cf-9 and Cf-9B transcripts in tomato plants suggested that transcriptional control of Cf-9B did not account for the late onset of Cf-9B-mediated resistance. Alternative explanations for the onset of Cf-9B-mediated resistance in mature plants are discussed.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas de Plantas
/
Glicoproteínas de Membrana
/
Regiones Promotoras Genéticas
/
Cladosporium
/
Solanum lycopersicum
Idioma:
En
Revista:
Mol Plant Microbe Interact
Asunto de la revista:
BIOLOGIA MOLECULAR
/
BOTANICA
/
MICROBIOLOGIA
Año:
2002
Tipo del documento:
Article
Pais de publicación:
Estados Unidos