Question

Mycorrhizal association controls root affecting pathogens in plants because.

• A. Mychorrhizal fungi colonize the roots and acts as a barrier during infection
• B. Mychorrhizal fungi helps in phosphorus uptake
• C. Mychorrhizal fungi help during stress and shock
• D. Mychorrhizal fungi produce toxins against pathogens

Answer 1

The correct option is A Mychorrhizal fungi colonize the roots and acts as a barrier during infection

Mycorrhizae are symbiotic relationships that form between fungi and plants. The fungi colonize the root system of a host plant, providing increased water and nutrient absorption capabilities while the plant provides the fungus with carbohydrates formed from photosynthesis. Mycorrhizal fungi are colonized around the root surface and protect the root from nematodes and other soil borne pathogens by acting as a physical protective barrier and secretion of certain chemicals.

So, the correct option is A.