Thread: PHOTOSYNTHESIS
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Old 14-03-2005, 03:20 AM
 
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wrote:
what are the wavelengths that plants need to produce energy? do they
need uv-a and uv-b light or is normal light enough?

400-700nm
No they do not need UV-a or b and normal light?
Not sure what normal light "is".

Plants possess a number of pigments and if you look at O2 evolution
over the spectrum, 400-700 nm is the usable active radiation
wavelengths.

While max absorptions levels are often mentioned, the reality is that
O2 prodouction is fairly stable throughout this range.

All light energy falls into the 2 reactions centers as P680*nm or
P700*nm to run photosynthesis.

Anything above that is fine. Plants can and do adapt their pigments to
catch whatever is available.

Regards,
Tom Barr

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