Use of RAPD, enzyme activity staining, and colony size to differentiate phytopathogenic Fuzarium Oxysporum isolates from Iran

Brazilian Journal of Microbiology

Mostafa Motallebi¹  Mohammad Reza Zamani¹  Omid Jazayeri¹  Mohammad Javad Harighi¹ 

[1] ,Razi University Faculty of Science Department of BiologyKermanshah,Iran

关键词: Fusarium oxysporum;    RAPD;    colony size;    enzyme activity staining;    Fusarium oxysporum;    RAPD;    tamanho de colônia;    coloração de atividade enzimática;   

DOI  :  10.1590/S1517-83822002000400004

来源: SciELO

【 摘 要 】

Fusarium oxysporum is a common soilborn plant pathogen with a worldwide distribution. Fusarium yellows disease of chickpea (Cicer arientinum) caused by F.oxysporum is one of the most destructive soilborn disease which is a major production constraint in chickpea-growing regions of Iran. Three laboratory methods "amplification of genomic DNA using random primers, enzyme activity staining, and colony size determination" have been used to discriminate between highly virulent (HV) and weakly virulent (WV) isolates of F. oxysporum. On the basis of colony size (a traditional morphological method) and the ability of isolates to produce pectic enzymes, five HV isolates were differentiated from three WV isolates. The HV isolates formed large colony (ranging from 10.1 to 12.6 mm in diameter) and showed the same enzyme pattern,while the WV isolates produced small colony (ranging from 5.8 to 7.8 mm in diameter) and had not detectable enzyme activity in the stained overlaying gel. Twelve arbitrary 10-mer primers were tested on these 8 isolates of F. oxysporum by Polymerase Chain Reaction (PCR). Cluster analysis of the data from the DNA amplification by Random Amplified Polymorphic DNA (RAPD), differentiated HV from WV isolates. The results obtained from RAPD test confirmed the classification of these eight isolates based on pathogenicity test, colony size, and enzyme activity staining into two groups (HV and WV).

【 授权许可】

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