tree trunk carries out the functions of the central highway, bringing nutrients from the roots to the leaves, flowers and fruits.In winter, it stores substances necessary for life, for it takes place in the summer sap flow.Usually there is one tree trunk.It grows vertically to the ground, but can be tilted or twisted as a result of any natural phenomena or third-party interventions.The trunk of the tree is increased by the growth of the apical bud - is the main escape of the whole plant.The division increases the thickness of the cambium.Wood - the bulk of the trunk is divided into tree rings.On top of a tree trunk bark covers - protective shell.As a rule, for this part of the plant is characterized by a shape close to the cylinder.Escape thickness comes to the top of the tree.
But sometimes even the trunk of the tree suddenly begins to mutate, and he at one or more locations appears outgrowth or cap.Typically, these deviations occur as a result of a dramatic shift in the development of a specific tree for reasons of natural character, or human intervention.Capa can grow not only on the trunk, but also to the roots of the trees.The build-up in the trunk of the tree can be single or may be a group of connected verevkoobraznymi processes.Capa always covered with bark, even on the roots.The build-up is not considered a disease of the tree, but a vicious wood as a building material.
On the other hand, burl wood texture ensures its relevance sculptors, designers, artists, cabinetmakers.It is valued for its beauty and uniqueness.It is caused by growth of a tree in a particular place: in the woods, in the mountains, close to the pond.From burls made veneers, furniture, board games, sculpture, prints, jewelry, knife handles, trim for cars, household items and much more.Wood is very difficult to build-up and processed on the machines, or manually, since the fibers are arranged irregularly and uniform.Some of them strongly tightened, making thorough unusually solid and durable.But Wood growths, undoubtedly, is very beautiful, it is widely used in the applied arts, from it make boxes, chests, utensils and more.
Sometimes a change, like a cap, says about the disease of trees.Photography is done with the tree on which the caps were removed, and it is obvious that changes the texture of the wood is not.Diseases of the tree, as a rule, complex processes that occur in dense interdependence with the environment.They are very diverse in character, and pathology.During the illness of the affected tissues die, but the tree as a whole is reduced viability.Also, these trees are immediately attracted masses of stem pests - insects.Biologists divide several species of trees diseases: cancer, necrosis, rot (root and stem).The trees themselves are often unable to cope with the disease themselves.This helps them to people: in the garden - the gardener, in the forest - an expert biologist.But, unfortunately, impaired ecology of the planet brings more and more new diseases of trees.
