Asked by Maddie Malloy on Jun 19, 2024
Verified
In low nitrogen soils, rhizobacteria secrete ____ to help root hairs recognize them.
A) cytokin
B) flavonoids
C) nod factors
D) calcium
E) water
Rhizobacteria
Beneficial bacteria that reside in the soil close to plant roots, often enhancing plant growth or protecting against pathogens.
Nod Factors
Signaling molecules produced by rhizobial bacteria that play a crucial role in the establishment of symbiosis with leguminous plants, leading to the formation of nitrogen-fixing nodules.
- Understand the interactions between roots and beneficial microorganisms.
Verified Answer
IY
Ioche YahmiJun 24, 2024
Final Answer :
C
Explanation :
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.
Learning Objectives
- Understand the interactions between roots and beneficial microorganisms.