Net movement of water is from

Options

A. Low DPD to high DPD
B. High DPD to low DPD
C. DPD gradient plays no role
D. None of the above

Answer

To answer the question about the net movement of water, we need to understand the concept of Diffusion Pressure Deficit (DPD). Here’s a step-by-step solution:

### Step 1: Understand DPD
- **Definition**: Diffusion Pressure Deficit (DPD) is the difference in diffusion pressure between two solutions. It indicates how much lower the diffusion pressure of a solution is compared to pure water.
- **Importance**: DPD helps in understanding the movement of water in plants, as it drives the movement from areas of higher water potential to areas of lower water potential.

**Hint**: Remember that DPD is a measure of how much a solution can draw water compared to pure water.

### Step 2: Water Movement and DPD
- **Water Movement**: Water moves from areas of low DPD to areas of high DPD. This is because water tends to move towards areas where it can equalize the concentration of solutes, which corresponds to higher DPD.
- **Water Potential**: Solutions with low DPD have higher water potential, meaning they have a greater tendency to lose water compared to solutions with high DPD.

**Hint**: Think of water moving like a crowd moving from a less crowded area to a more crowded area.

### Step 3: Analyze the Options
- **Option A**: Low DPD to high DPD - This is correct as water moves from areas of lower diffusion pressure deficit to areas of higher diffusion pressure deficit.
- **Option B**: High DPD to low DPD - This is incorrect as it contradicts the principle of water movement.
- **Option C**: DPD gradient plays no role - This is incorrect as DPD is crucial in determining water movement.
- **Option D**: None of the above - This is incorrect since option A is valid.

**Hint**: Eliminate options that contradict the basic principles of DPD and water movement.

### Step 4: Conclusion
- The net movement of water is from areas of low DPD to areas of high DPD, which corresponds to option A.

**Final Answer**: The correct answer is **A. low DPD to high DPD**.