Isolation of a strain of Bacillus thuringiensis ssp. kurstaki HD-1 encoding delta-endotoxin Cry1E.
A strain of Bacillus thuringiensis, STB-1, toxic against Spodoptera exigua, was isolated. Bacillus thuringiensis STB-1 produced bipyramidal inclusions and reacted with the H antiserum of B. thuringiensis ssp. kurstaki. The plasmid and protein profiles of B. thuringiensis STB-1 were compared with those of its reference strains, ssp. kurstaki and ssp. kenyae. To verify the gene type of B. thuringiensis STB-1, PCR analysis was performed with Spodoptera-specific cry gene primers. The result showed that B. thuringiensis STB-1, unlike its reference strains, had crylAa, crylAb, crylAc and crylE, suggesting that B. thuringiensis STB-1 was a unique strain with respect to gene type. In addition, B. thuringiensis STB-1 showed a high level of toxicity against both S. exigua and Bombyx mori, whereas B. thuringiensis ssp. kurstaki HD-1 or ssp. kenyae showed a high level of toxicity against only Bombyx mori or S. exigua, respectively.
Division of Applied Biology and Chemistry, College of Agriculture and Life Sciences, Seoul National University, Suwon, Korea.
J H
JH
Chang
J Y
JY
Roh
Y H
YH
Je
H W
HW
Park
B R
BR
Jin
S D
SD
Woo
S K
SK
Kang
D000818:Animals; D001413:Bacillus thuringiensis / Q000235:genetics* / Q000302:isolation & purification* / Q000502:physiology; D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D001427:Bacterial Toxins; D004591:Electrophoresis, Polyacrylamide Gel; D004731:Endotoxins / Q000235:genetics* / Q000378:metabolism; D005798:Genes, Bacterial; D006460:Hemolysin Proteins; D007306:Insecticides; D010572:Pest Control, Biological; D016133:Polymerase Chain Reaction; D018411:Spodoptera / Q000187:drug effects
D000083722:Bacillus thuringiensis Toxins; D001426:Bacterial Proteins; D001427:Bacterial Toxins; D004731:Endotoxins; D006460:Hemolysin Proteins; D007306:Insecticides; C030956:insecticidal crystal protein, Bacillus Thuringiensis