Select an incorrect statement regarding transpiration / stomata

Options

A. Water stress results in decline of growth in plants.
B. The water lost from leaf cells creates root pressure
C. Stomatal pores open into the intercellular spaces of the leaf
D. Evaporation causes cooling of leaves.

Answer

To solve the question of selecting an incorrect statement regarding transpiration or stomata, we will analyze each option provided.

### Step-by-Step Solution:

1. **Understanding Transpiration and Stomata**:
- Transpiration is defined as the loss of water vapor from the aerial parts of the plant, primarily through small openings called stomata.
- Stomata are pores located on the surface of leaves that facilitate gas exchange (CO2 in, O2 out) and also play a crucial role in transpiration.

2. **Evaluating the Statements**:
- **Statement A**: "Water stress results in decline of growth in plants."
- This statement is **true**. Water stress negatively impacts plant growth as it limits essential processes like photosynthesis and nutrient uptake.

- **Statement B**: "The water lost from leaf cells creates root pressure."
- This statement is **false**. Root pressure is generated in the roots due to osmotic pressure when water is absorbed from the soil, not from the loss of water through transpiration. Transpiration actually leads to a negative pressure that helps draw water up from the roots.

- **Statement C**: "Stomatal pores open into the intercellular spaces of the leaf."
- This statement is **true**. Stomata connect to intercellular spaces, allowing for gas exchange within the leaf.

- **Statement D**: "Evaporation causes cooling of leaves."
- This statement is **true**. The process of evaporation of water from the leaf surface helps in cooling the leaf, which is beneficial for maintaining optimal temperatures for photosynthesis.

3. **Conclusion**:
- After evaluating all the statements, the incorrect statement is **B**: "The water lost from leaf cells creates root pressure."

### Final Answer:
The incorrect statement regarding transpiration/stomata is **B**: "The water lost from leaf cells creates root pressure."

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