Secondary metabolite profiles and mating populations of Fusarium species in section Liseola associated with bakanae disease of rice
- Author:
Nur Ain Izzati Mohd Zainudin
;
Azmi Abd Razak
;
Baharuddin Salleh
- Publication Type:Journal Article
- Keywords:
Secondary metabolite, mating population, bakanae, Fusarium, Gibberella
- From:Malaysian Journal of Microbiology
2008;4(1):6-13
- CountryMalaysia
- Language:English
-
Abstract:
A total of 25 strains of Fusarium species that belong to F. fujikuroi (a pathogen of bakanae disease), F. proliferatum, F.sacchari, F. subglutinans and F. verticillioides were isolated from rice plants showing typical bakanae symptoms in Malaysia and Indonesia and screened for their secondary metabolites. The objectives of the studies were to determine the
physiological variability based on production of moniliformin (MON), fumonisin (FB1), gibberellic acid (GA3) and fusaric acid (FA) as well as to ascertain the mating populations (MPs) within the Gibberella fujikuroi species complex based on their
ability to produce perithecia and viable ascospores. Production of GA3 could be used to separate F. fujikuroi that belongs to MP-C from other species. In crosses with seven standard testers of MPs, 76% of strains could be assigned to at least one of the G. fujikuroi species complex namely MP-A (G. moniliformis), MP-B (G. sacchari), MP-C (G. fujikuroi) and MP-D (G. intermedia). Single strain (M3237P) that was assigned as MP-C, and has also been identified morphologically as F. fujikuroi
was also crossed-fertile with MP-D tester. The secondary metabolites profiles and the presence of MP-A, MP-B, MP-C and MP-D strains on samples of bakanae-infected rice plants are new records in Malaysia.
- Full text:P020160923350925191663.pdf
