Winter rust is for plants, especially trees and shrubs, the period when the days are shorter and the nights are longer and colder, in which growth is almost stopped. If the number of hours of light is artificially extended by, for example, street lights, the flora will hold longer leaf in the immediate vicinity. Many perennial herbaceous plants form tubers with resting buds or thickened roots with vegetation points.
The winter rust will be lifted when the temperature rises and a few weeks will be between 0 and 5 ° C and the days will get longer. This can also be done artificially by administering certain chemicals or adjusting the amount of hours light and dark, as happens in the boxes often. As a result, certain plants can be bloomed at any time. Resting can also be forced by administration of the phytohormone abscisic acid and can be terminated by administration of gibberellin. Animals
In animals, a similar period is generally referred to as hibernation, although some animals, for example bears, actually hold a form of winter rest.
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