Bt toxin genes cryI Ac and cryllAb control cotton boll worms. These genes are isolated from the bacterium and are incorporated into cotton plants. ‘cry genes’ in Bacillus thuringiensiscodes for toxic insecticidal proteins that exist as inactive prototoxins.
These proteins when expressed in cotton crops through genetic engineering confers pest resistance against cotton bollworms and prevents damage. As the larva of these insects when feed upon cotton plant parts, the toxin gets activated in their gut, lysing their cells and leads to death thus, making them pest resistant.
How is Bt cotton made to attain resistance against bollworm?
Answers
MR.RAJENDRA
Bt toxin genes cryI Ac and cryllAb control cotton boll worms. These genes are isolated from the bacterium and are incorporated into cotton plants. ‘cry genes’ in Bacillus thuringiensiscodes for toxic insecticidal proteins that exist as inactive prototoxins.
These proteins when expressed in cotton crops through genetic engineering confers pest resistance against cotton bollworms and prevents damage. As the larva of these insects when feed upon cotton plant parts, the toxin gets activated in their gut, lysing their cells and leads to death thus, making them pest resistant.