Rolandvue,1st Week November:Fall Colors,Anthrocyanins

It is hard to put a date on the changing leaf colors, it does seem more obvious this week and the Maryland Department of Natural Resources agrees that this is the peak for the upper Chesapeake Bay area. It seems maybe a little early with a lot of green and little change in the red burning bush.

Every fall we hear the story about the leaf chemistry.  During spring and summer the chlorophyll absorbs light in the high energy blue end of the spectrum as well as some light in the longer wavelength red spectrum while reflecting the middle mostly green light.  As the days get shorter and the temperature cooler the chlorophyll is recycled, leaving the remaining colorful chemicals dominant, reflecting light in the yellow orange and red.  The carotinoids produce the brighter yellows, the anthrocyanins darker reds.

Red oak off of Rolandvue

v

These are the same class of chemicals as some of the vitamins your mother told you about.  They can protect the leaves from oxidation,infection and from sun damage,  just as vitamins can protect your cells.  There is not much literature about getting the nutrients directly from the changing tree leaves.  There are tea formulas, which would extract some of the beneficial chemicals.  The green Linden leaves are suggested as a lettuce substitute and seem well-tolerated.  The colorful vitamins are there but hidden by the chlorophyll. The problem in the fall with concentrated anthrocyanins may be the bitterness.  Many of the "good for you " chemicals are bitter and would be concentrated in the red leaves.

There is also the longstanding chemical warfare between plants and animals.  The plants produce toxins like oxalates and tannins to ward off snackers.  The solid cellulose cell wall also makes absorption of the internal chemicals difficult. Maybe a really fine blending with a Vitamix would release the nutrients.

There is a suggestion that global warming will affect the fall colors, with perhaps dryer weather making the palette more drab.  This will be hard to quantitate with color being so subjective. Compare these photos next November.  The vine is Virginia creeper to be mentioned again next week.  If you see these colors you are somewhere near the first week in November.