Abstract

Dormancy is the state of plants in which the growth processes are stopped, the intensity of metabolism decreases.
 Dormancy is expressed in a delay of the seeds germination, tubers, and buds opening. It is the normal physiological state
 of plants, and it should be considered as a hereditary biological adaptation to the unfavorable conditions of a particular season.
 Dormancy can be controlled by external conditions (exogenous or compulsory dormancy) or by the internal factors
 (endogenous, organic or deep dormancy). In addition, there are such types of dormancy as combined, winter, summer,
 extended, preliminary. In areas with harsh winters winter dormancy is a prevalent survival strategy for both herbaceous
 and woody plants. Winter dormancy is a certain physiological state of woody and shrub plants, in which the plant is able
 to withstand low negative temperatures of air and soil.

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