Yeast and Temperature
How does temperature affect yeast?
At low temperatures (0-10 C) yeast will not grow, but
not die either. At temperatures 10-37 C yeast will
grow and multiply, faster at higher temperatures with
an optimal growth at 30 or 37 C (that depends on the
species). At higher temperature the cells become
stressed, meaning that their content becomes damaged
and which can be repaired to some degree. At high
temperatures (>50 C) the cells die. The bacteria can
survive freezing under certain conditions.
When baking bread all yeast dies during the process.
Dr. Trudy Wassenaar
yeast is a unique type of fungi that grows quickly by rapid cell division.
It grows best at about 100 degrees fahrenheit, colder will cause it to go
dormant, much warmer could kill it
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Update: June 2012