Question

Which of the following forms Hartig net in the intercellular spaces of root cortex?

• A. Endomycorrhizae
• B. Ectomycorrhizae
• C. Lichens
• D. All biofertilizers which develop on roots

Hint:

Only one type of mycorrhiza grows between cortical cells without entering them.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept
Mycorrhizae are associations between fungi and plant roots, and they are of two main types.

Step 2: Ectomycorrhizae
The fungus forms a thick mantle around the root. Its hyphae grow inward only between the cortical cells, forming a mesh called the Hartig net.

Step 3: Endomycorrhizae
Hyphae enter the cortical cells and form arbuscules and vesicles, so they do not make a Hartig net. Lichens are not root associations.

Final Answer:
Ectomycorrhizae form the Hartig net. \[ \boxed{\text{(B) }\text{Ectomycorrhizae}} \]