Understanding the impact of Bacillus thuringiensis proteins on non-target organisms

Tanvi Singh¹ , Yamini Tiwari² , Garima Awasthi³

Section:Review Paper, Product Type: Isroset-Journal
Vol.6 , Issue.2 , pp.169-176, Apr-2019

CrossRef-DOI:   https://doi.org/10.26438/ijsrbs/v6i2.169176

Online published on Apr 30, 2019

Copyright © Tanvi Singh, Yamini Tiwari, Garima Awasthi . This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
 

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Abstract :
Bacillus thuringiensis (Bt) is a spore-forming, gram-positive, aerobic, rod-shaped bacterium. During sporulation, Bt produces proteinaceous crystals called Cry proteins that are lethal to many insects’ species, so are commonly used as biological pesticide. Transgenic Bt crops are genetically altered to express insecticidal toxins that cause fatality of a number of general agricultural pests. The insecticidal toxins formed by Bt crops possess narrow range of toxicity and therefore less non-target impacts as compared to conventional insecticides. A decrease in the amount and regularity of insecticide applications are financially advantageous. In numerous regions of the world, insecticide inputs have been significantly reduced because of Bt. The use of Bt crop technology might help in worldwide food security by escalating the amount and steadiness of crop yields. Though impact of Bt toxin on non-targeted organism is a serious issue yet no conclusion could still be drawn from several studies. This review summarizes the benefits of Bt crops including the impact on non-targeted organisms and Bt toxins having potential risks with respect to the environment.

Key-Words / Index Term :
Bacillus thuringiensis, Bt toxin, Cry proteins, environment, non-target organisms

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