Question

Give a brief account on VAM.

• A. Forms fungal sheath around root
• B. Fungal hypha grows intracelluarly
• C. Fungal hypha destoys cortical cells to rach phloem of the plant
• D. Forms hartig net in the intercellular spaces of cortex

Answer 1

The correct option is A Forms fungal sheath around root

Mycorrhiza is the product formed by the symbiotic association between the fungus and the roots of higher plants. Vesicular Arbuscular Mycorrhizae (VAM) is the symbiotic association between Phycomycetes fungus and the roots of angiospermic plants forming a mycelial sheath and also acts as a biofertilizer.

Some of the main characteristic features are :

• Helps to absorb important macro and microelements and water

• Compatible with other biofertilizers

• Provides protection to the plants from pathogenic fungi and nematodes

• Does not affect ecological balance and environmental friendly.

So, the correct answer is 'Forms fungal sheath around root'