Question

Pinus seed cannot germinate and establish without fungal association. This is because :
(1) its embryo is immature.
(2) it has obligate association with mycorrhizae
(3) It has very hard seed coat.
(4) Its seeds contain inhibitors that prevent germination.

Answer 1

Answer: Option (2) it has obligate association with mycorrhizae is the correct answer.

Explanation:

Pinus seed cannot germinate and establish without fungal association because it has obligate association with mycorrhizae. Pinus plant can not absorb water properly because root hairs are less in number. For that purpose, pinus plant made association with fungi for the absorption of water that is required for germination of seed. In this association fungi gets food from plant and plant get nutrients and water through fungi.