화학공학소재연구정보센터
Journal of Applied Microbiology, Vol.100, No.5, 964-972, 2006
Nucleotide excision repair and photoreactivation in the entomopathogenic fungi Beauveria bassiana, Beauveria brongniartii, Beauveria nivea, Metarhizium anisopliae, Paecilomyces farinosus and Verticillium lecanii
Aims: To compare the DNA repair capabilities of the entomopathogenic fungus (EPF) bassiana to the EPF Beauveria brongniartii, Beauveria nivea, Meta-rhizium anisopliae, Paecilomyces farinosus, Verticillium lecanii, and the fungi Aspergillus niger and Neurospora crassa. Methods and Results: Germination of B. bassiana conidiospores following ultraviolet (UV) irradiation was used to show that nucleotide excision repair and photo reactivation decrease the post-UV germination delay. These two modes of repair were characterized and compared between the aforementioned EPF, A. niger and N. crassa using a physiological assay where per cent survival post-UV irradiation was scored as colony forming units. Conclusions: The results showed B. bassiana and M. anisopliae are the most UV-tolerant EPF. The DNA repair capabilities indicated that EPF do not have all DNA repair options available to fungi, such as A. niger and N. crassa. Significance and Impact of the Study: A key factor detrimental to the survival of EPF in agro-ecosystems is UV light from solar radiation. The EPF literature pertaining to UV irradiation is varied with respect to methodology, UV source, and dose, which prevented comparisons. Here we have characterized the fungi by a standard method and established the repair capabilities of EPF under optimal conditions.