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How Bacillus thuringiensis provides inse...

How Bacillus thuringiensis provides insect resistance?

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During sporulation Bacillus thuringiensis produces crystal proteins called Delta - endotoxin which is encoded by cry genes . Delta -endotoxins have specific activities against the insects of the orders Lepidoptera , Diptera , Coleoptera and Hymenoptera . When the insects ingest the toxin crystals their alkaline digestive tract denatures the insoluble crystals making them soluble . The cry toxin then gets inserted into the gut cell membrance and paralyzes the digestive tract . The insect then stops eating and starves to death.
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