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Name:  Zhongying
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Question:
Why do plants turn yellow without light? Is it because the chlorophyll breaks down without sunlight?


Replies:
Please see:
http://www.taunton.com/fg/features/plants/4whengreen.htm
http://www.ext.nodak.edu/extnews/askext/indoor/218.htm

Sincerely,

Anthony R. Brach

The green color of plants does indeed come from chlorophyll, and chlorophyll must have light to function, so plants without light lose or do not produce chlorophyll, turning yellow or even white.

J. Elliott


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