True color of leaves

Harald Teicher hteicher at biobase.dk
Tue Mar 21 04:15:45 EST 1995


David Mauzerall (mauzera at ROCKVAX.ROCKEFELLER.EDU) wrote:
: Dear Ray: Leaves are colored by the pigments they contain. They are bluish 
: from the chlorophyll and yellowish from the carotenoids, resuling in the 
: usual green. If the carotenoids predominate they can be reddish or purplish. 
: In the fall, the chlorophyll goes before the carotenoids, exposing their colors 
: alone. The carotenoids can also oxidize (as does the chlorophyll) to give some 
: of the deeper colors of someleaves such as maples. The radio man was confusing 
: chlorophyll and photosynthesis.

according to paper chromatographic and spectroscopic studies i have done as an
undergrad, chlorophyl seperates from  other plant pigments on the 
chromatograph as two *green* bands (chl a and chl b), while the caroteinoids
separate as yellow or orange bands. spectroscopic data reveal that chlorophyl
does not absorb (ie relects) *green* light. either i am colour-blind, or i
have missed something important, so if you have any evidence for *blue*
chlorophyl i would be very interested in hearing about it.

thank you for your time

harry



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