Cold injury is a very important factor affecting the growth of fruit trees, vegetables, pastures and crops. Low temperature can also lead to plant death. Carrots are no exception.
When the temperature is lower than 0℃, the intercellular space and xylem vessels and tracheids freeze, and the water in the cells enters the intercellular space and freezes continuously, resulting in the inability of water to flow in plants and dehydration in cells, which makes many metabolic reactions in cells unable to proceed, thus leading to the freezing of plants.
Moreover, the longer the low temperature condition lasts, the ice crystals in plants will automatically recrystallize, which will aggravate the freezing injury.
Frozen carrots can no longer be stored and eaten.
Extended data:
In order to resist severe cold and prevent freezing injury, plants have also developed some methods to resist freezing injury. Carrots use the sugar in their bodies to grow tenaciously in the cold winter.
When the temperature is low in winter, carrots will convert the starch in the body into soluble sugars, such as glucose and fructose, and arrange these soluble sugars in the gaps between cells. The soluble sugar content is positively correlated with the cold resistance of plants, that is, the higher the soluble sugar content, the stronger the cold resistance of plants.
Soluble sugar can reduce the freezing point of cell fluid and freeze at 0℃. Under the action of sugar, it can only be frozen at a temperature of MINUS 3℃ or even lower, which is equivalent to enhancing the ability to resist low temperature. It can play the role of "antifreeze", prevent cells from freezing, protect cells from cracking, and enhance the cold resistance of carrots, which can grow healthily even in cold winter.
In the process of resisting the cold, the soluble sugar content in carrots increases, so people feel sweeter.
People's Network-Ruan: Interesting! Carrots are afraid of cold and winter is sweeter?
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