Peach skin will freeze purple in winter.

The phenomenon that peach skin will freeze purple in winter is caused by low temperature, which is called the accumulation of purple pigment (LTP) induced by low temperature dormancy. When the temperature drops, peach trees enter a dormant period, at which time the photosynthetic activity is weakened and the chlorophyll content is reduced. At the same time, low temperature stimulation can also promote the accumulation of purple pigment in peach peel. The accumulation of this purple pigment can be used as a defense mechanism to help protect fruits from damage caused by low temperature.