October 1, 2001
University Of Wisconsin-Madison
University of Wisconsin-Madison scientists have a new theory about why autumn leaves turn scarlet and why the hues are more vibrant some years than others. They say that the red pigments -- called anthocyanins -- in plants such as maples, oaks, dogwoods and viburnums act like sunscreen.
MADISON, Wis., Sept. 28 -- Every fall, thousands of Americans head for the woods to see summer extinguished in a blaze of color. In Wisconsin, they celebrate Colorama. In New England, the visitors are called "leaf peepers." They travel hundreds of miles north for the yellows, the oranges and especially the reds.
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University Of Wisconsin-Madison. "Autumn Color Is Nature's Sunscreen, Say Researchers." ScienceDaily. ScienceDaily, 1 October 2001. <www.sciencedaily.com/releases/2001/10/011001072513.htm>.
University Of Wisconsin-Madison. (2001, October 1). Autumn Color Is Nature's Sunscreen, Say Researchers. ScienceDaily. Retrieved March 8, 2014 from www.sciencedaily.com/releases/2001/10/011001072513.htm
University Of Wisconsin-Madison. "Autumn Color Is Nature's Sunscreen, Say Researchers." ScienceDaily. www.sciencedaily.com/releases/2001/10/011001072513.htm (accessed March 8, 2014).