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

Question

Quizplus · 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.

In Low Nitrogen Soils, Rhizobacteria Secrete ____ to Help Root