Which of the following facilitates opening of stomatal aperture ?

Options

A. Contraction of outer wall of guard cells
B. Decrease in turgidity of guard cells
C. Radial orientation of cellulose microfibrils in the cell wall of guard cells
D. Longitudinal orientation of cellulose microfibrils in the cell wall of guard cells

Explanation

To solve the question "Which of the following facilitates opening of stomatal aperture?", we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Stomata**: Stomata are small openings found on the surfaces of leaves, primarily responsible for gas exchange. They are surrounded by guard cells that regulate their opening and closing.

2. **Role of Guard Cells**: The guard cells are specialized cells that control the size of the stomatal aperture. Their turgidity (water content) plays a crucial role in this process.

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