What are evidences of root pressure? What is role of root pressure in plant life?

Explanation

### Step-by-Step Text Solution

**Step 1: Define Root Pressure**
Root pressure is the pressure exerted in the xylem of a plant's roots due to the accumulation of water and solutes. It occurs when ions are absorbed from the soil, causing water to follow these ions due to osmosis, leading to an increase in pressure within the xylem.

**Step 2: Identify Evidences of Root Pressure**
1. **Guttation**: One of the primary evidences of root pressure is the phenomenon of guttation. This occurs when excess water is expelled from the tips of leaves or special openings (hydathodes) during the night or early morning when transpiration is low.
2. **Droplets Formation**: During periods of high root pressure, water droplets can be observed forming at the edges of leaves, especially in grasses and other plants with high transpiration rates.
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