Question

VAM is component of _________.

• A. Ectomycorhiza
• B. Endomycorhiza
• C. Green manure
• D. Mycoherbicides

Answer 1

The correct option is B

Endomycorhiza

The correct option is B.

Explanation of the correct option:

1. VAM or Vesicular-arbuscular mycorrhiza is formed by the symbiotic relationship between certain fungi and angiosperm roots.
2. A symbiotic relationship is defined as the mutual relationship between two organisms where both organisms are benefitted.
3. VAM is a type of endo mycorrhizae.
4. It penetrates within the cells of the plants.
5. The fungus colonizes the root cortex and forms a mycelial network along with characteristic arbuscules.
6. Arbuscules are branched finger-like hyphae.

Explanation of the incorrect options:

Option A:

Ectomycorrhizae is also a symbiotic association between fungi and the roots of plants, where fungi attach only externally to the roots of the plants.

Option C:

The crops grown specifically for maintaining and building soil fertility and structure are green manure, though they may also have other functions.

Option D:

Mycoherbicides are herbicides that are based on fungal substrates.

Final answer: VAM is a component of Endomycorhiza.