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plant growth in different light spectra

Husain Qutbuddin tahiyyat at eis1.eis.com.eg
Wed Mar 11 10:37:26 EST 1998

I am doing an experiment in which I am exposing plants to different =
spectra of light for a length of time (a few days) and then measuring =
their length increase in that period of time. Although growth is not a =
direct effect of photosynthesis it would be expected that the plants =
will grow more when they are exposed to the violet, blue and red =
spectra, because the plant pigments absorb these ranges most. But I am =
also comparing the increase of length of the plants when exposed to =
these ranges to its increase when their exposed to normal light. Can =
anyone predict if the plants will grow faster when exposed to only =
normal light compared to its growth in violet, blue or red? Assuming of =
course that the growth will be a consequence of the plant =
photosynthesizing faster.

Any specific book references which give answer to this question will =
also be appreciated.


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