Leaves do not reserve moisture and nutrients | Leaves shed easily
Trees will be beautiful and colorful with plenty green leaves in the rainy season. But in the winter season, only trunks of many trees are visible with very less leaves. Leaves shed in the winter season. When the temperature of the atmosphere falls suddenly from one level to another level, the capacity of any tree in absorbing the nutrients from the Earth gets reduced. Then roots of the trees could not function well. Tree could not be provided with sufficient water and moisture by the roots. If this condition prolongs for a longer period, then leaves shed rapidly and even the tree may die.
When water is not sufficiently absorbed by the tree, it uses the nutrient substances and moisture stored in the trunks and branches. But there is no water reserve for leaves. So leaves shed. Just before the ripening or shedding of a leaf, a small auxiliary bud is formed at the end connection between the branch and leave. Gradually it dries up and leaf sheds easily. In the next season, trees resume their capacity of absorbing and look radiant with new shoots.