The gene coding for a new transcription factor (ftf1) of Fusarium oxysporum is only expressed during infection of common bean.
We report the isolation and analysis of the gene encoding ftf1 (Fusarium transcription factor 1), a previously undescribed putative transcription factor from highly virulent strains of Fusarium oxysporum f.sp. phaseoli that is transcribed specifically during early stages of infection of its host common bean (Phaseolus vulgaris L.). The predicted 1080 amino acid ftf1 protein contains a Zn(II)2-Cys6 binuclear cluster DNA-binding motif. ftf1 expression during axenic growth in culture was not detected by either Northern or RT-PCR. On the contrary, in planta transcription of ftf1 is increased about 24h after plant inoculation, as detected by real-time RT-PCR. This result suggests that ftf1 has a role in the establishment of the fungus within the plant and/or the progress of the disease. Multiple copies of ftf1 are present in highly virulent strains of F. oxysporum f.sp. phaseoli.
Ramos
Brisa
B
Centro Hispano-Luso de Investigaciones Agrarias (CIALE), Departamento de Microbiología y Genética, Universidad de Salamanca, Avda, Campo Charro s/n, 37007 Salamanca, Spain.
Alves-Santos
Fernando M
FM
García-Sánchez
M Asunción
MA
Martín-Rodrigues
Noemí
N
Eslava
Arturo P
AP
Díaz-Mínguez
José María
JM
D000595:Amino Acid Sequence; D007887:Fabaceae / Q000382:microbiology; D005670:Fusarium / Q000235:genetics / Q000378:metabolism*; D015966:Gene Expression Regulation, Fungal; D005800:Genes, Fungal / Q000235:genetics; D008969:Molecular Sequence Data; D010935:Plant Diseases / Q000382:microbiology; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014157:Transcription Factors / Q000378:metabolism*
D014157:Transcription Factors