Question

The Ectomycorrhiza form_______ on the root surface.
A. Root tuber
B. Mantle
C. Root hair
D. Vesicles

Answer 1

Hint: Ectomycorrhiza is limited to the outer layers of the root cells and is unable to penetrate the root cortical cells.

Complete answer: The mycorrhiza is a symbiotic association between a fungus and plant. It is a (+/+) type of interaction in which both the organisms that are a fungus and plant are benefitted and neither of the organism is harmed.
Mycorrhiza can be differentiated into two categories based on the penetration of fungal cells in the root.
1. Ectomycorrhiza- It is a symbiotic association between the fungus and roots of higher plants. Ectomycorrhiza forms a Hartig net around the plant cell within the root cortex. It is found in association with woody plants mainly including the oak, pine, eucalyptus, etc. These consist of a hyphal sheath or mantle that covers the root top and forms a network surrounding the root cells.
2. Endomycorrhiza- In this kind of symbiotic association, the fungal hyphae penetrate the cortical cells of the root and can form arbuscules and vesicles through which they drive the nutrition from plants and propagate in the plant cells.

Therefore, the correct option is Option B. Mantle

Note: Characteristic feature of the ectomycorrhiza is the mantle or Hartig net formation. The endomycorrhiza is characterized by the formation of arbuscules and the vesicles.