A significant influence on the growth of plants has a light . If you grow green plant in the dark, it turns of abnormal appearance. Such etiolated pl

Light effect on plant growth [Influence, Impact, Role]

A significant influence on the growth of plants has a light. If you grow green plant in the dark, it turns of abnormal appearance. Such etiolated plants grow very long. They grow long, drawn out and, moreover, have very weak and feeble shoots. The anatomical structure of such etiolated plants with shorter leaves is also quite remarkable. The mechanical and conductive tissues hardly develop in etiolated plants. Thus, the third phase of growth almost does not pass in them. This example shows a great formative influence of light on plant growth.

All flowering plants, except of parasites need light for normal growth. Experiments show that plants require a relatively low intensity light for growth. Of particular importance for plant growth are blue-violet rays.

Plants that receive light, richer in ultraviolet rays, usually gain rosette shape. Such rosette forms are particularly common in mountainous environments where always more ultraviolet rays than in the valleys.

Not all plants need light for its normal growth. Taken from http://worldofschool.org

Fungi and bacteria

Bacteria and fungi without chlorophyll grow better in the dark. Even the hat mushrooms spend almost all their life in the form of mycelium under the ground, and only the fruiting bodies are formed on the light. Light acts negatively on the growth of fungi and bacteria. From this fact it was concluded long age that the role of light, particularly sunlight, in the disinfection of rooms. An old proverb says: “Where the sun does not look often, there comes to the doctor.”

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