Name any one function of phytochrome.

Explanation

### Step-by-Step Solution:

1. **Understanding Phytochrome**: Phytochrome is a type of photoreceptor found in plants that is sensitive to light, particularly in the red and far-red regions of the light spectrum.

2. **Types of Phytochrome**: There are two interconvertible forms of phytochrome:
- **Phytochrome R (Red)**: This form absorbs red light at a wavelength of 660 nm and appears blue in color.
- **Phytochrome FR (Far-red)**: This form absorbs far-red light at a wavelength of 730 nm and appears blue-green.

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