To achieve a glowing rose flower in sunlight, there are a few different approaches that can be taken. Here are some options:

1. Use a reflective surface: One way to make a rose flower appear to glow in sunlight is to place it on a reflective surface, such as a mirror or a piece of aluminum foil. This will reflect the sunlight back onto the flower and create a bright, glowing effect. Here is an example of a rose on a mirrored surface:

2. Use backlighting: Another way to create a glowing effect is to place the rose in front of a light source, such as a window or a lamp, and then take the photo from behind the flower. This will create a backlit effect that can make the petals appear to glow. Here is an example of a backlit rose:

3. Use post-processing: If the lighting conditions aren't ideal for creating a glowing effect, it's possible to enhance the photo in post-processing. This can be done by adjusting the brightness, contrast, and saturation levels, as well as adding a soft glow or lens flare effect. Here is an example of a rose that has been enhanced in post-processing:

In conclusion, there are several ways to create a glowing rose flower in sunlight, including using a reflective surface, backlighting, and post-processing. By experimenting with different techniques, it's possible to capture a beautiful and eye-catching photo of this stunning flower.