Explanation:
Mycorrhiza is a mutually beneficial association between a fungus and the roots of higher plants. The fungus absorbs water, salts and protects the plant from soil borne pathogens. In return, it gets shelter and nourishment from the plant. It is of two type : (i) Ectomycorrhiza are very common in nature on pines, (Pinus) oaks, (Querns), beech (ii) Endomycorrihza occur in red maple.