Bacillus thuringiesis Flashcards
1
Q
what happens during sporulation
A
species synthesizes endospore and crystal made from subunits of a toxic protein
2
Q
how is the toxin activated
A
insects with alkaline gut solbulizes the crystal produces portoxin, insect protease cleaves protoxin producing an active toxin
3
Q
how does insect die
A
subunits of toxin form a pore in the PM of insect’s gut. contents leak out provide trigger for germination and nutrient for outgrowth and return of cell to veg. state.
4
Q
what is Bt
A
and insecticide with large quantities of Bacillus thurigensis
