Throughout the year, some leaves change colour from green, to yellow, to red. Discover the role chlorophyll, carotene and anthocynanin pigments play in making this happen.
- Leaf colour depends on which pigment molecules occurs in the greatest quantity.
- Chlorophyll is the pigment that gives leaves their green colour and allows them to covert solar energy into chemical energy.
- Carotene is a pigment that changes the color of leaves to orangey yellow during the autumn as temperatures drop.
- Anthocyanin is a pigment that turns leaves red because more sugars accumulate in leaves in autumn.
In the course of a year, deciduous trees go through an amazing transformation.
Complex chemical reactions inside each leaf create vibrant, seasonal changes in colour.
In spring and summer, most leaves are a vibrant green.
This is due to a green pigment inside the leaf cells called chlorophyll.
This pigment converts the Sun's …
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