Have a look at:
http://photoscience.la.asu.edu/photo...hotointro.html

Carotenoids can function as acessory pigments to scavenge energy not
immediately useful by chlorophylls. A shade plant with a lot of
carotenoids (or other pigments) may be trying to use what light it
receives as efficiently as possible.

M.Reed

sunjuice wrote:

let me reformulate my question:

Why are a lot of carotenoids found in shade plants?

--
sunjuice
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