Saturday, 25 October 2014

Sunscreen for leaves?...kinda!

"Why do tree leaves turn red in fall?  In the fall, the leaves of some trees turn yellow, orange or red.  The bright colors are wonderful to behold.  But do they have some hidden purpose? Nature is very efficient, and doesn't just do something for no reason.  As the leaves of the tree begin to change, nutrients are shuttled into the roots for reuse in the spring.  Bill Hoch (Plant Physiologist, UW) suspected that some trees produce red pigments as a kind of sunscreen, protecting leaves from sunlight while the tree stores nutrients." (www.earthsky.org)

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