1. Cold protection, heatstroke prevention and insect prevention.
2. The most important function of gas exchange is to transport nutrients.
3. Provide attachment places for insects, fungi and mosses.
4. As an important basis for identifying tree species and tree age.
In horticulture, epiphytes and flowers, such as orchids, can't grow in soil, and are often cultivated with tree dander.
6. Some barks can be used as bottle stoppers, lifebuoys, sound insulation boards, etc. In North America and northeastern China, birch bark is used to make boats and utensils.
7. Some barks are edible. The most commercially valuable tree species are cinchona and Cinnamomum cassia, which can extract quinine and spices. Aspirin is extracted from willow bark.
These are the functions of the bark of Solanum nigrum. I hope it helps you.