Beginning in late autumn, and then throughout the winter tree and shrub species of flora of our region in a state of rest.Such winter phenomena in the life of plants are caused by many reasons.Among them - a significant reduction of temperature, lack of adequate nutrition and others.Life processes of plants are inhibited, even under favorable conditions have arisen suddenly could not renew.Many people probably noticed that if in December and January bring home the cut sprig of a tree and put it in the water in the heat, it does not "wake up", while maintaining its lifeless appearance.But if you already like to do at the end of winter, when spring approaches, the bloom buds instantly, although the street is still very cold.Why is this happening?What role does the life of plants in the winter?What makes the flora in the wild and in the surrounding squares and parks to wake up, spreading fresh foliage?These and other interesting questions will try to answer in this article.
Plants
winter in tropical countries that winter that summer - the temperature is not particularly "jumps" to the major averages.Therefore, the trees in the tropics and subtropics, and grow green all year round.Other business - central Russia, for example.Or Siberia.Here, fluctuations in temperature "plus-minus" sometimes breaks up into fifty degrees, and that many species of deciduous trees destructively.Wise nature has come up with for these plants with leaves, the protective reaction of the poor living conditions that arise in the cold.Winter phenomena in plant life - a kind of "lock" of life processes, helps to survive difficult times.What happens to them?
Metabolism
Winter events in the life of the plant cause a state of rest, slowing metabolism inside the barrel.Visible growth of trees suspended.As the return of moisture to the atmosphere.As well as using the power of the root system.No, winter trees, of course, is also growing.Just do it very slowly, imperceptibly to the human eye.Moisture also circulates (complete cessation of circulation, according to the observations of scientists, occurs at minus 18).A big tree in the winter evaporates still in the air up to 250 ml of water.But, you see, these processes occur much more slowly than in the spring and the summer.
Dropping leaves
Almost all the trees shed their leaves during the winter (except evergreen).It gradually turn yellow and fall throughout the autumn, leaving bare branches.These winter phenomena in the life of plants are also related to the mechanisms of protection from the cold: the plant loses its leaves, as if locked from the environment.Stops almost photosynthesis, a process vital to containing chlorophyll leaves.Power is minimal, as the main portion of the carbon dioxide are processed with the help of the foliage.A root system, due to the frost reduces the flow of moisture and minerals from the soil.
Features transition into hibernation
can say that the first signal for the plant is to reduce the daylight.When the daylight hours shortened considerably, there is a change in the cells of the relations between the substances responsible for metabolism and tissue growth.The tree as it begins to be prepared to slow down the processes of life.
How long hibernation trees
Such a state of deep hibernation, comparable to hibernation, different species of trees and shrubs lasts differently.For example, birch or poplar - until the end of January.A maple or linden carried out in this state up to six months (in particularly cold winters).At lilac same period of hibernation ends by December.
