Effect of NaCl-stressed Bacillus thuringiensis (Bt) cotton on the feeding behaviors and nutritional parameters of Helicoverpa armigera

PloS One
Junyu LuoJin-Jie Cui

Abstract

Saline-alkali soil is an arable land resource on which transgenic Bacillus thuringiensis (Bt) cotton has been planted on a large scale in accordance with food security strategies. There are, however, concerns about the insecticidal effects of Bt cotton on target insect pests. In this study, a Bt cotton variety, GK19, and its nontransgenic parent variety, Simian-3, were used as experimental models for investigating the effect of the expression of exogenous insecticidal proteins in Bt cotton under NaCl stress on the feeding behavior and nutritional parameters of Helicoverpa armigera. The results showed that the expression of exogenous insecticidal proteins in GK19 was significantly inhibited under NaCl stress. However, the feeding, crawling, resting and spinning down behavior of the 5th instar H. armigera larvae on GK19 Bt cotton, as well as the amount of food consumed and feces produced by these larvae, did not markedly differ under different NaCl concentrations. In contrast, the mean relative growth rate (MRGR), relative growth rate (RGR), approximate digestibility (AD), efficiency of conversion of ingested food (ECI) and efficiency of conversion of digested food (ECD) of the larvae markedly decreased in response to NaCl stress...Continue Reading

References

Aug 17, 2002·The Plant Journal : for Cell and Molecular Biology·Carl E PrayScott Rozelle
Sep 10, 2002·Journal of Economic Entomology·J GoreD R Cook
Sep 30, 2004·Journal of Insect Science·T M BrownP K Bryson
Feb 9, 2008·Nature Biotechnology·Bruce E TabashnikYves Carriére
Mar 13, 2010·Journal of Insect Physiology·K ShobanaA Naresh Kumar

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Methods Mentioned

BETA
transgenic
salt stress

Software Mentioned

SPSS

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