Abstract

KNAAK, Neiva; ROHR, Angelise Ana  and  FIUZA, Lidia Mariana. In vitro effect of Bacillus thuringiensis strains and Cry proteins in phytopathogenic fungi of paddy rice-field. Braz. J. Microbiol. [online]. 2007, vol.38, n.3, pp. 526-530. ISSN 1517-8382.  http://dx.doi.org/10.1590/S1517-83822007000300027.

Cry1Ab and Cry1Ac strains and proteins synthesized by Bacillus thuringiensis thuringiensis and B. thuringiensis kurstaki were assessed in the following phytopathogens: Rhizoctonia solani,Pyricularia grisea,Fusarium oxysporum and F. solani, which had their micelial growth decreased after incubation in the presence of the bacterial strains. As to Cry proteins, there were no inhibition halo development in the assessed concentrations.

Keywords : Paddy rice; Bacillus thuringiensis; phytopathogens; Cry proteins.