Seeds of red dragon fruit (Ivan Big Tree, 3040) when exposed to regular daylight as well as when illuminated by a 365 nm ultraviolet (UV-A) blacklight from HEB Supermarket. College Station, Texas

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College Station, Texas, September 16 - 18, 2024

Album 3622: College Station, Texas, September 16 - 18, 2024

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The accompanying photo features two side-by-side images of dragon fruit seeds. The top image shows the seeds under normal daylight and the bottom image depicts them illuminated by a blacklight.

In both images, we see the same dragon fruit seed (Ivan Big Tree, 3040) from the red variety, which is characterized by its white flesh with bright red skin. A close-up view of the seeds reveals their dark coloration.

The top image was captured in normal daylight and shows the seeds displaying a deep black or very dark brown hue. The bottom image was taken under UV-A illumination and demonstrates that the dragon fruit seeds fluoresce at a blue-violet wavelength, as indicated by the purple hue present at the bottom right edge of the image.

The primary purpose of this photo is to illustrate the effects of ultraviolet light on the coloration of dragon fruit seeds. The image likely aims to showcase the results of an experiment or observation regarding how UV-A illumination affects the appearance of these seeds and possibly other aspects of their biology. – AI vision

🇪🇸 Descripción en español / Spanish Description

Las semillas del pitahaya rojo (Ivan Big Tree, 3040) cuando se exponen a la luz normal diurna y también cuando se iluminan con una luz negra ultravioleta de 365 nm en el HEB Supermarket. College Station, Texas, 16 de septiembre de 2024. La foto adjunta muestra dos imágenes lado a lado de las semillas del pitahaya. En la imagen superior, se muestran las semillas bajo luz diurna normal y en la parte inferior, se representan iluminadas con una luz negra. En ambas imágenes, vemos la misma semilla del pitahaya (Ivan Big Tree, 3040) de la variedad roja, que se caracteriza por su carne blanca con piel roja brillante. Una vista cercana de las semillas revela su coloración oscura. La imagen superior fue capturada bajo luz diurna normal y muestra las semillas mostrando un tono negro profundo o marrón muy oscuro. La imagen inferior se tomó con iluminación UV-A y demuestra que las semillas del pitahaya emiten fluorescencia en una longitud de onda azul-violeta, como indica el tono púrpura presente en el borde inferior derecho de la imagen. La finalidad principal de esta foto es ilustrar los efectos de la luz ultravioleta en la coloración de las semillas del pitahaya. Es probable que la imagen muestre los resultados de un experimento u observación sobre cómo la iluminación UV-A afecta el aspecto de estas semillas y, posiblemente, otros aspectos de su biología. – Spanish translation

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