Tobacco root exudates contains which chemical substances during induction of chemtotaxis against A. tumefaciens?

Answer: Option B

Tobacco root exudates contain Acetosyringone chemical substances during induction of chemotaxis against A. tumefaciens.
Agrobacterium tumefaciens is a soil phytopathogen that naturally infects plant wound sites and causes crown gall disease via delivery of transferred (T)-DNA from bacterial cells into host plant cells through a bacterial type IV secretion system.
Acetosyringone is known to improve transformation efficiency by up-regulating the virulence of Agrobacterium. In previous studies using Eustoma, the effect of this compound has only been tested during inoculation.