365Caws is now in its 14th year of publication, and was originally intended to end after 365 days. It has sometimes been difficult for me to find new material, particularly during the winter months, but now as I enter my own twilight years, I cannot guarantee that I will be able to provide daily posts. It is my hope that along the way I may have inspired someone to a greater curiosity about the natural world. If so, I can rest, content in the knowledge that my work here has been done.
Friday, October 15, 2021
Xanthous
Day 2: Hmmm...I might have been lost down the rabbit hole forever, but for a detour it took into certain controlled substances. I was reading up on xanthophyll, the pigment which provides the beautiful yellows revealed in autumn when it is no longer masked by chlorophyll ("xanthous" means "yellow"). I was intrigued to learn that some herbicides target xanthophyll because it protects plants against light toxicity. By destroying the pigment, these herbicides open the plant to light-burning. As I read on, I found myself pondering the significance of xanthophyll and the seasonal reduction of chlorophyll when natural light levels diminish, and the next thing I knew, I struck a whole Google page devoted to suggested reading for commercial growers of a product I'd prefer to see made illegal. You know what they say about not being able to "unsee" something. I may never be able to look at my vining hydrangea in quite the same way again.
Labels:
light toxicity,
vining hydrangea,
xanthophyll
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