In Low Nitrogen Soils, Rhizobacteria Secrete ____ to Help Root

Question

In low nitrogen soils, rhizobacteria secrete ____ to help root hairs recognize them.
A) cytokin
B) flavonoids
C) nod factors
D) calcium
E) water

Accepted Answer

Rhizobacteria secrete nod factors in low nitrogen soils to help root hairs recognize them. This is a crucial step in the formation of nitrogen-fixing nodules, especially in legumes, facilitating a symbiotic relationship where the plant provides carbohydrates to the bacteria, which in turn fix atmospheric nitrogen into a form the plant can use.