Chapter 1
The sleep of the giants
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Chapter 2
Natural antifreeze inside the trunk
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Chapter 3
Evergreen strategies across the globe
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YOUR GOAL
Master of How trees survive winter
Ch 1 · The sleep of the giants
artiteacher The sleep of the giants
Pumping sweet sugar right into my cells, my own antifreeze when the winter wind blows.
Fun Fact
Leaf recycling: Before dropping leaves, trees salvage up to 50 percent of their nitrogen, storing it in roots to jumpstart growth in spring.
Glossary
dormancy (noun)
A state of temporary metabolic inactivity or minimal activity in an organism. In autumn, trees produce abscisic acid to trigger this protective state and survive freezing winter temperatures.
A state of temporary metabolic inactivity or minimal activity in an organism. In autumn, trees produce abscisic acid to trigger this protective state and survive freezing winter temperatures.
Quiz
Which plant hormone triggers the cells to digest themselves and detach a tree's leaf in autumn?
Quiz
What is the name of the protective, cork-like substance that seals a tree's leaf scar after shedding?
Quiz
What valuable nutrient do trees salvage and store in their roots before leaves fall?
Quiz
What temperature can a dormant sugar maple tree withstand without freezing to death?
