Question

What happens to plants during etiolation?

Answer 1

Etiolation, or weakening, of a plant occurs when its stems grow longer and more rapidly than normally because of a lack of sunlight. Spindly plants in search of light lose strength, have long internodes and few leaves. Nodes are the areas of the stem where leaves are located; internodes are the stem areas between nodes. Plants developing early in the season experience the greatest internode growth, while growth decreases at the end of the growing season

Answer 2

The pale color is caused from a lack of chlorophyll – the pigment in leaves that makes them green. Internodes (the length between growing points on a stem) are longer and leaves are sparse. The plant stretches during etiolation because it increases the likelihood of it finding light.


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