Xq. Wu et al., MOSQUITO LARVICIDAL ACTIVITY OF TRANSGENIC ANABAENA STRAIN PCC-7120 EXPRESSING COMBINATIONS OF GENES FROM BACILLUS-THURINGIENSIS SUBSP ISRAELENSIS, Applied and environmental microbiology, 63(12), 1997, pp. 4971-4974
Various combinations of the genes cryIVA (cry4A), cryIVD) (cry11A), an
d p20 from Bacillus thuringiensis subsp. israelensis were introduced i
nto the nitrogen-fixing cyanobacterium Anabaena sp. strain PCC 7120 by
means of Escherichia coli-Anabaena shuttle vector pRL488p and were ex
pressed under control of two tandem strong promoters, a cyanobacterial
promoter (PpsbA) and an E. coli T7 promoter (P-A1). Two of the clones
carrying cryIVA plus cryIVD, one with p20 and one without p20, displa
yed toxicity against third-instar larvae of Aedes aegypti at levels gr
eater than any level previously reported for transgenic cyanobacteria.