Abstract
A recombinant plasmid pSTK-3A containing cry3Aa7 gene encoding a coleopteran-specific insecticidal protein was constructed and introduced into wild Bacillus thuringiensis subsp. aizawai G03, which contained cry1Aa, cry1Ac, cry1Ca, and cry2Ab genes and was highly toxic to lepidopteran insect pests. The genetically engineered strain were named G033A. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis and Western blot analysis demonstrated that the cry3Aa7 gene was expressed normally and produced a 67 kDa protein in G033A, and the flat rectangular crystals of Cry3Aa7 toxin protein was observed under scanning electron microscope. The recombinant plasmid was maintained in bacteria cultured for 180 generations in culture media containing no antibiotics. Synthesis of the Cry3Aa7 toxin conferred high and broad toxicity to the recombinant strain G033A against coleopteran order, elm leaf beetle (Pyrrhalta aenescens) (LC50 0.35 mg/ml), for which the parental strain G03 was not toxic. Both the parental strain G03 and recombinant strain G033A showed strong insecticidal activity to lepidopteran pests, beet armyworm (Spodoptera exigua), diamondback moth (Plutella xylostella), and cotton bollworm (Helicoverpa amigera), respectively. The lethal concentration 50% (LC50) of G033A against S. exigua, P. xylostella, and H. amigera was 4.26, 0.86, and 1.76 μg/ml, respectively.
Similar content being viewed by others
References
Agrants H, Lereclus D (1991) How does Bacillus thuringiensis produce so much insecticidal crystal protein? J Bacteriol 177:6027–6032
Arantes O, Lereclus D (1991) Construction of cloning vectors for Bacillus thuringiensis. Gene 108:115–119
Baum JA, Malvar T (1995) Regulation of insecticidal crystal protein production in Bacillus thuringiensis. Mol Microbiol 18:1–12
Boonserm P, Angsuthanasombat C, Lescar J (2004) Crystallization and preliminary crystallographic study of the functional form of the Bacillus thuringiensis mosquito-larvicidal Cry4Aa mutant toxin. Acta Cryst D60:1315–1318
Cowley R, Fernandez F, Freemantle W, Rutter D (1992) Enzyme immunoassay for Q fever: comparison with complement fixation and immunofluorescence tests and dot immunoblotting. J Clin Microbiol 30:2451–2455
de Maagd RA, Bosch D, Stiekema W (1999) Bacillus thuringiensis toxin-mediated insect resistance in plants. Trends Plant Sci 4:9–13
de Maagd RA, Bravo A, Crickmore N (2001) How Bacillus thuringiensis has evolved specific toxins to colonize the insect world. Trends Genet 4:193–199
De Souza MT, Lecadet MM, Lereclus D (1993) Full expression of the cryIIIA toxin gene of Bacillus thuringiensis requires a distant upstream DNA sequence affecting transcription. J Bacteriol 175:2952–2960
Finney DJ (1971) Probit analysis. Cambridge Univ. Press, Cambridge UK
Glare TR, O’Callaghan M (2000) Bacillus thuringiensis Biology, Ecology and Safty. Wiley, Chichester, UK
Hofmann C, Lüthy P, Hütter R, Pliska V (1988) Binding of the delta-endotoxin from Bacillus thuringiensis to brush-border membrane vesicles of the cabbage butterfly (Pieris brassicae). Eur J Biochem 173:85–91
Kalman S, Kiehne KL, Cooper N, Reynoso MS, Yamamoto T (1995) Enhanced production of insecticidal proteins in Bacillus thuringiensis strains carrying an additional crystal protein gene in their chromosomes. Appl Environ Microbiol 61:3063–3068
Kaur S (2000) Molecular approaches towards development of novel Bacillus thuringiensis biopesticides. World J Microbiol Biotechnol 16:781–793
Knowles BH (1994) Mechanism of action of Bacillus thuringiensis insecticidal delta-endotoxins. Adv Insect Physiol 24:275–308
Knowles BH, Ellar DJ (1987) Colloid-osmotic lysis is a general feature of the mechanism of action of Bacillus thuringiensis δ-endotoxin with different insect specificity. Biochim Biophys Acta 924:509–518
Kuo WS, Chak KF (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 62:1369–1377
Lawley TD, Taylor DE (2003) Characterization of the double-partitioning modules of R27: correlating plasmid stability with plasmid localization. J Bacteriol 185:3060–3067
Lecadet MM, Chaufaux J, Ribier J, Lereclus D (1992) Construction of novel Bacillus thuringiensis strains with different insecticidal activities by transduction and transformation. Appl Environ Microbiol 58:840–849
Lereclus D, Arantes O, Chaufaux J, Lecadet MM (1989) Transformation and expression of a cloned δ-endotoxin gene in Bacillus thuringiensis. FEMS Microbiol Lett 60:211–218
Lereclus D, Vallade M, Chaufaux J, Arantes O, Rambaud S (1992) Expansion of insecticidal host range of Bacillus thuringiensis by in vivo genetic recombination. Biotechnology 10:418–421
Malvar T, Gawron-Burke C, Baum JA (1994) Overexpression of Bacillus thuringiensis HknA, a histidine protein kinase homolog, bypasses early Spo− mutations that result in CryIIIA overproduction. J Bacteriol 176:4742–4749
Navon A (2000) Bacillus thuringiensis insecticide in crop protection-reality and prospects. Crop Prot 19:669–676
Park HW, Bideshi DK, Federici BA (2003) Recombinant Strain of Bacillus thuringiensis producing Cyt1A, Cry11B, and the Bacillus sphaericus binary toxin. Appl Environ Microbiol 2:1331–1334
Park HW, Delecluse A, Federici BA (2001) Construction and characterization of a recombinant Bacillus thuringiensis subsp. israelensis strain that produces Cry11B. J Invertebr Pathol 78:37–44
Roberts L (2002) Mosquitoes and disease. Science 298:82–83
Sambrook J, Fritsch EF, Maniatis T (1989) Molecular cloning: a laboratory manual, 2nd edn. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY
Schnepf E, Crickmore N, van Rie J, Lereclus D, Baum J, Feitelson J, Zeigler DR, Dean DH (1998) Bacillus thuringiensis and its pesticidal crystal proteins. Microbiol Mol Biol Rev 62:775–806
Sekar V (1988) The insecticidal crystal protein gene is expressed in vegetative cells of Bacillus thuringiensis var. tenebrionis. Curr Microbiol 17:347–349
Song FP, Zhang J, Huang DF, Xie TJ, Dai LY, Li GX (1998) Establishment of PCR-RFLP identification system of cry genes from Bacillus thuringiensis. Sci Agric Sin 31:19–24
Song FP, Zhang J, Gu AX, Wu YE, Han LL, He KL, Chen ZY, Yao J, Hu YQ, Li GX, Huang DF (2003) Identification of cry1I-type genes from Bacillus thuringiensis strains and characterization of a novel cry1I-Type gene. Appl Environ Microbiol 69:5207–5211
Tabashnik BE, Finson N, Chilcutt CF, Cushing NL, Johnson MW (1993) Increasing efficiency of bioassays: evaluation of resistance to Bacillus thuringiensis in diamondback moth (Lepidoptera: Plutellidae). J Econ Entomol 86:635–644
Whalon ME, Wingerd BA (2003) Bt: mode of action and use. Arch Insect Biochem Physiol 54:200–211
Yu JX, Pang Y, Tang MJ, Xie RY, Tan L, Zeng SL, Yuan MJ, Liu JY (2001) Highly toxic and broad-spectrum insecticidal Bacillus thuringiensis engineered by using the transposon Tn917 and protoplast fusion. Curr Microbiol 43:112–119
Zhang J, Song FP, Li CY, Chen ZY, Tan JX, Huang DF (2002) Cloning and expression of cry3Aa7 gene from Bacillus thuringiensis strain toxic to Coleopteran pests. Sci Agric Sin 35(6):650–653
Acknowledgements
We are very grateful to Ms. Yingping Liang and Dr. Gemei Liang for test larvae supply and help in bioassays. We thank Dr. Didier Lereclus, in Pateur Institute, France, Dr. Yiping Wang in Peking University, China and Ming Sun, in Huazhong Agricultural University, Wuhan of China for the experiment material. This work was supported by 863 Plan of China (No.2004AA214091, No.2002AA212061) and 973 Projects of China (No.2001CB109005, No.2003CB114201).
Author information
Authors and Affiliations
Corresponding authors
Rights and permissions
About this article
Cite this article
Wang, G., Zhang, J., Song, F. et al. Engineered Bacillus thuringiensis GO33A with broad insecticidal activity against lepidopteran and coleopteran pests. Appl Microbiol Biotechnol 72, 924–930 (2006). https://doi.org/10.1007/s00253-006-0390-x
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s00253-006-0390-x