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Question

Which among the following is a phosphate solubilising symbiotic association?

A
Pseudomonas
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B
Rhizobium
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C
Mycorrhiza
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D
Azolla
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Solution

The correct option is C Mycorrhiza
Mycorrhiza are symbiotic association of fungi with plants like the Pinus of gymnosperms. These fungi are capable of mobilizing inorganic phosphates present in the soil and supply it to the plant. This is the source of phosphorus for the plants.

Pseudomonas do not have a symbiotic relationship but are known to cause infections.
Rhizobium is a nitrogen fixing bacteria in a symbiotic relationship with the members of legumnious plants.
Azolla is a plant that forms a symbiotic relationship with the cyanobacterium Anabaena azollae which helps in nitrogen fixation.

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