Shoot of mustang grape (Vitis mustangensis) when ...

The image presents a comparison of the same shoot of mustang grape (Vitis mustangensis) under two distinct lighting conditions: regular daylight and UV-A blacklight illumination. The left side of the image displays the plant's appearance in natural light, while the right side showcases its response to the 365 nm ultraviolet (UV-A) blacklight from Lick Creek Park.

**Left Side: Daylight**

* **Plant Appearance:** The shoot appears pale green with a subtle sheen.
* **Petals and Stems:** The petals are not visible due to their white or light-colored hue, blending with the surrounding foliage.
* **Stem Coloration:** The stems exhibit a soft green color.

**Right Side: UV-A Blacklight Illumination**

* **Plant Appearance:** Under UV-A blacklight illumination, the plant's appearance changes dramatically.
* **Petals and Stems:** The petals become visible as they absorb the UV light, turning bright blue or purple. This phenomenon is known as "fluorescence," where certain materials emit light when exposed to ultraviolet radiation.
* **Stem Coloration:** The stems also exhibit a noticeable change in color, transitioning from green to yellow.

In summary, the image effectively illustrates the distinct responses of mustang grape shoots to different lighting conditions. While they appear relatively inconspicuous under regular daylight, their true colors and structures are revealed when exposed to UV-A blacklight illumination, showcasing a striking contrast between the two environments. – AI vision