Positive hydrostatic pressure developing in root xylem due to active solute accumulation is called

Options

A. Root pressure
B. Imbibition pressure
C. Water potential
D. Diffusion pressure deficit

Answer

**Step-by-Step Solution:**

1. **Understanding the Question:** The question asks about a specific type of positive hydrostatic pressure that develops in the root xylem due to the active accumulation of solutes.

2. **Identifying Key Terms:**
- **Hydrostatic Pressure:** This refers to the pressure exerted by a fluid at equilibrium due to the force of gravity.
- **Root Xylem:** This is the part of the plant responsible for the transport of water and nutrients from the roots to the rest of the plant.
- **Active Solute Accumulation:** This refers to the process where solutes are actively transported into the root cells, leading to an increase in solute concentration.

3. **Analyzing the Options:**
- **Option 1: Root Pressure:** This is the pressure that develops in the root xylem due to the accumulation of solutes, which causes water to move into the xylem, creating positive pressure.
- **Option 2: Imbibation Pressure:** This refers to the absorption of water by a substance, which is not specifically related to the pressure in the xylem.
- **Option 3: Water Potential:** This is a measure of the potential energy in water, which influences the movement of water but does not specifically refer to the pressure in the xylem.
- **Option 4: Diffusion Pressure Deficit:** This relates to the difference in concentration that drives diffusion but does not describe the pressure in the xylem.

4. **Conclusion:** Based on the definitions and explanations of each option, the correct answer is **Root Pressure**. This is the positive hydrostatic pressure that develops in the root xylem due to the active accumulation of solutes.

**Final Answer:** Root Pressure

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