DR KEITH WHEELER / SCIENCE PHOTO LIBRARY DR KEITH WHEELER / SCIENCE PHOTO LIBRARY
Sycamore leaves (Acer pseudoplatanus). The leaves are an orange-red colour due to the predominance of yellow and red carotenoids that protect the developing chlorophyll from the sun. Carotenoids are organic pigments that are found in the chromoplasts of plants. Photographed in spring.
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