Autumn time - time of preparation for winter. Plants are prepared for the
winter sleep to gain forces to rapid growth in spring.
With the advent of autumn, the duration of daylight is decreasing. Tree
produces less nutrients, slowing down all its processes.
The chlorophyll begins to collapse, and green color in the leaves
decreasing. There comes a time of other pigments: yellow xanthophyll,
carotene, orange and red anthocyanin. Because of these pigments leaves
obtain a bright color. Along with green color of leaves go, and
carbohydrates. They are moving in the winter, "pantries", which will be
partially converted before spring. After leaf fall wood is very is rich
with starch, and fallen leaves do not contain it almost completely.
The process leave-fall begins in the summer. At the bottom there is a
special cork layer generating. It has a smooth wall, which can easily be
separated from each other. When the cells of the layer begin to collapse,
then we can talk about the beginning of leaf fall. Slowly whirling leaves
of all colors and shades covers the ground with a beautiful carpet. The
leaves are falling, and creating a new cork layer, ready to become the
basis for the formation of new leaves at spring.
Tree is preparing itself for winter.