Re: color of light and color of plant leaves

["Daniel Larsson" <defdac at hotmail_com>]

James Purchase said:
>What are you asking? UV-A and UV-B are NOT part of the visible spectrum

>That doesn't mean that plants don't react and respond to radiation in these
>ranges - it just isn't involved (beneficially) with photosynthesis.

.. and that what was I was referring to. I have managed to trigger
anthocyanin
with a Hagen Reptiglo 5.0 bulb and L. arcuata, L. inclinata, P. palustris
all got
deep red and almost black with a couple of days.
I don't care about photosynthesis really. I care about color and the
pigments
that is responsible for the colors and what to do to trigger them.

You stated that this is done by mimic the sunlight as close as possible (and
have proper nutrient levels etc). Sunlight isn't only what we humans can see
as you said yourself =).
Sunlight also contains UV-light, and almost every hobbyist uses bulbs
without
the UV-portion, which isn't really realistic or close to sunlight.

So my question was: Should we try to get closer to sunlight by using UV-A
and UV-B also?

(UV-C is the part that cause damage to DNA by the way (and used in
UV-filters). To much exposure of UV-B can be dangerous - that's why we
and the plants develop pigments.)

>Perhaps the colors we see in some varieties of aquatics have very little to
>do (directly) with photosynthesis.

Exactly ;)I