the rock to the right was slightly on the plant so i assume it is the cause, but id like to understand why
by ruinedfairytale4
the rock to the right was slightly on the plant so i assume it is the cause, but id like to understand why
by ruinedfairytale4
2 Comments
It’s a class of chemicals called “anthocyanins” that occur in plants. Depending on type and amount they make leaves or fruit or flowers look red, pink, purple, blue, black
>Botanists of the late 19th-century, most notably the Germans who studied plant anatomy and physiology, noticed that anthocyanin production rises when a plant is subjected to low temperatures and high light conditions. This observation led to the popular explanations that anthocyanins protect the photosynthetic structures against intense sunlight and help to warm leaves by increasing their rates of metabolism. These scientists lacked the instrumentation and detailed knowledge of photosynthesis to test their ideas. In the mid-20th century, investigators became aware that ultraviolet (UV) radiation could induce anthocyanin synthesis, leading to the hypothesis that anthocyanins protect plant tissues against UV damage. But, as it turns out, anthocyanins absorb rather weakly in the UV-B region of the spectrum (wavelengths of 285–320 nanometers), which is most responsible for damage to biological tissues; other colorless flavonoid pigments that are equally, or more, abundant in the leaves absorb UV-B much more strongly.
https://www.americanscientist.org/article/why-leaves-turn-red#:~:text=David%20Lee%20and%20Kevin%20Gould,UV%2DB%20much%20more%20strongly.