I was curious given this week’s extremely low temperatures, and how yearly, trees seem to avoid death of their cells and structures in what would be otherwise destructive temperatures. How do they do this?
In: Biology
As tree grows older it generates new cells from inside out. The outer layer of cells then becomes it’s bark. The nutrients (sap)flow through the walls (or layers). Over a period of time the outer bark stops receiving the nutrients. It dies and forms the basis for a woody structure. It has dried fiber and miniscule air dots. Many such layers protects the inside of a tree.
However, depending upon the size of the tree and bark thickness, a tree can get freez and die too.
In tropical landscapes, such things happen to even older trees because the fiber of the bark is not strong enough to withstand cold.
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