Abstract
A novel strain of Bacillus thuringiensis Bt11, isolated from soil samples in China, was classified and characterized in terms of its crystal proteins, cry genes content. The Bt11 strain showed high toxicity against Spodoptera exigua and Helicoverpa armigera neonates. Bt11 strain shares morphological and biochemical characteristics with the previously described Bacillus thuringiensis subsp. kurstaki. SDS-polyacrylamide gel electrophoresis revealed that crystals were composed of several polypeptides ranging from 20 to 130 kDa, of which the 35, 80, and 130 kDa proteins were the major components. PCR-RFLP with total DNA from strain Bt11 and specific primers for cry1, cry2, cry3, cry4/10, cry7, cry8, cry9, and cry11 genes revealed that cry1Aa, cry1Ab, cry1Ia, and cry9Ea genes were present.
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References
Abbott W S (1925). A method of computing the effectiveness of an insecticide. J Econ Entomol 18, 265–267
Ceron J, Covarrubias L, Quintero R, Ortiz A, Ortiz M, Aranda E, Lina L, Bravo A (1994). PCR analysis of the cryI insecticidal crystal family genes from Bacillus thuringiensis. Appl Environ Microbiol 60(1), 353–356
Dai L Y, Wang X P (1997). Progress of Study on Bacillus thuringiensis. Beijing: Science Press 15–23 (in Chinese)
Dankocsik C, Donovan W P, Jany C S (1990). Activation of a cryptic crystal protein gene of Bacillus thuringiensis subspecies kurstaki by gene fusion and determination of the crystal protein insecticidal specificity. Mol Microbiol 4(12), 2087–2094
De Maagd R A, Kwa M S, Van der Klei H, Yamamoto T, Schipper B, Vlak J M, Stiekema W J, Bosch D (1996). Domain III substitution in Bacillus thuringiensis delta-endotoxin CryIA (b) results in superior toxicity for Spodoptera exigua and altered membrane protein recognition. Appl Environ Microbiol 62(5), 1537–1543
Gill S S, Cowles E A, Pietrantonio P V (1992). The mode of action of Bacillus thuringiensis endotoxins. Annu Rev Entomol 37, 615–636
Guo W (2005). Studies on the inheritance of resistance to Bacillus thuringiensis Cry1Ac and defense system of Cabbage Looper, Trichoplusia ni. Dissertation for the Doctoral Degree. Guangzhou: Zhongshan (Sun Yen-sen) University (in Chinese)
Iracheta M M, Pereyra-Alférez B, Galán-Wong L, Ferré J (2000). Screening for Bacillus thuringiensis crystal proteins active against the cabbage looper, Trichoplusia ni. J Invertebr Pathol 76(1), 70–75
Kuo W S, Chak K F (1996). Identification of novel cry-type genes from Bacillus thuringiensis strains on the basis of restriction fragment length polymorphism of the PCR amplified DNA. Appl Environ Microbiol 62(4), 1369–1377
Lecadet M M, Frachon E, Dumanoir V C, Ripouteau H, Hamon S, Laurent P, Thiéry I (1999). Updating the H-antigen classification of Bacillus thuringiensis. J Appl Microbiol 86, 660–672
LeOra Software. POLO-PC: probit and logit analysis (1997). Berkeley, CA: University of California, Berkeley
Li R S, Chen T, Deng H F (1983). The ultramicro structure of Bacillus thuringiensis. Acta Microbiologica Sinica 23(4), 343–346 (in Chinese)
Li R S, Chen T, Luo C (1989). The toxicity and morphology structure of Bacillus thuringiensis. Acta Microbiologica Sinica 29(6), 397–404 (in Chinese)
Liao C, Heckel D G, Akhurst R (2002). Toxicity of Bacillus thuringiensis insecticidal proteins for Helicoverpa armigera and Helicoverpa punctigera (Lepidoptera: Noctuidae), major pests of cotton. J Invertebr Pathol 80(1), 55–63
Russell R M, Robertson J L, Savin N E (1977). POLO: a new computer program for probit analysis. Bull Entomol Soc Am 23, 209–213
Saiki R K, Gelfand D H, Stoffel S, Scharf S J, Higuchi R, Horn G T, Mullis K B, Erlich H A (1988). Primer-directed enzymatic amplification of DNA with a thermostable DNA polymerase. Science 239, 487–491
Sambrook J, Fritsch E F, Maniatis T (1989). Molecular Cloning: A Laboratory Manual (in Chinese, trans. Jin Dongyan, Li Mengfeng). 2nd ed. Beijing: Science Press, 1992
Song F P, Zhang J, Xie T J, Yang Z W, Dai L Y, Li G X (1998). Establishment of PCR RFLP identification system of cry genes from Bacillus thuringiensis. Scientia Agricultura Sinica 31(3), 13–18 (in Chinese)
Yu Z N (1990). Bacillus thuringiensis. Beijing: Science Press, 25–47 (in Chinese)
Zhang G M (2001). Bacillus thuringiensis and its parasporal crystal protein. In: Cheng J A, Tang Z H, eds. Insect Molecular Science. Beijing: Science Press, 293–326 (in Chinese)
Zhao J Z, Cao J, Li Y, Collins H L, Roush R T, Earle E D, Shelton A M (2003). Transgenic plants expressing two Bacillus thuringiensis toxins delay insect resistance evolution. Nature Biotechnology 21 (12), 1493–1497
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Liu, T., Guo, W., Sun, W. et al. Biological characteristics of Bacillus thuringiensis strain Bt11 and identification of its cry-type genes. Front. Agric. China 3, 159–163 (2009). https://doi.org/10.1007/s11703-009-0040-z
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DOI: https://doi.org/10.1007/s11703-009-0040-z