Paranormal Metrou:: So, what makes trees change color? Most people assume it’s climate or moisture but it’s actually the length of nighttime. These longer nights create a chemical change. There are three types of pigment involved in fall colors: Chlorophyll which we know as the chemical that creates the plants’ green color. Carotenoids which produce yellow, orange and browns, and anthocyanins which create red. As autumn arrives, the chlorophyll production goes down with the longer nights (less sunlight). The other two chemicals present in the leaves show at this point; the carotenoids and anthocyanins. Some species take longer to change colors. Temperature and moisture during the time that chlorophyll is lowering is what influences the brilliance of the colors.
Posted on: Tue, 01 Apr 2014 03:31:38 +0000
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