Short Wave Micro Wave: Why Do Leaves Change Color During Fall?
Oct 23, 2020
Explore the magical transformation of leaves in autumn as a botanist explains the science behind their vibrant color change. Discover how shorter days and colder temperatures trigger this stunning seasonal shift. Learn about the roles of pigments like chlorophyll and carotenoids, and why deciduous trees prepare for winter dormancy differently than conifers. Plus, hear touching messages from listeners celebrating a year of engaging scientific exploration!
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Deciduous Tree Leaf Change
- Deciduous trees, unlike conifers, change leaf color and shed leaves annually.
- This process is cued by shorter days and colder temperatures, preparing the trees for winter.
Leaf Pigments and Colors
- Leaves change color due to pigments absorbing and reflecting light.
- Chlorophyll makes leaves green, carotenoids produce yellow and orange, and anthocyanins create red.
Trees' Winter Preparation
- As leaves change color, trees enter a hibernation mode, conserving energy for winter.
- Nutrients flow to limbs slows down, and leaves eventually die and fall off.