What is significance of phytoagglutinin ?

Explanation

### Step-by-Step Solution:

1. **Definition of Phytoagglutinin**: Phytoagglutinin is a chemical substance that plays a crucial role in the interaction between certain plants and microorganisms. The term "phyto" refers to plants, while "agglutinin" indicates its ability to cause aggregation or clumping.

2. **Source of Phytoagglutinin**: This substance is primarily found in legumes, where it is involved in the symbiotic relationship with Rhizobium bacteria. Rhizobium is a type of bacteria that forms nodules on the roots of legumes and is essential for nitrogen fixation.

3. **Role in Symbiosis**: Phytoagglutinin acts as a mediator that facilitates the connection between Rhizobium and legume plants. It helps in the aggregation of Rhizobium cells, allowing them to effectively colonize the root nodules of the legumes.

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