Red plants under red light

["Philippe Lemaire" <ph.lemaire at CompaqNet_be>]

Thanks for the answer...

I also think the red is hidden "below" the green as most nice trees in spring and
autumn that are only green in summer !

However the question is then :
Does light without green slow down photosynthesis ?
It is meant with the same Fe, NO3, PO4 level anywhere in the tank.

Regards,

Philippe



| Date: Sat, 14 Sep 2002 05:48:34 -0700 (PDT)
| From: john wheeler <jcwheel76 at yahoo_com>
| Subject: Re: Red plants
| 
| Hey gang,
| 
| 
| Richard Sexton wrote:
| >>(Assuming sufficient iron) Blue light makes red
| leaves, (IIRC).<<
| 
| I'm not so sure about that. I am sure that iron has
| little or nothing to do with red pigments in plants.
| 
| Red pigment or Anthocyanin is produced as a response
| to UV-B, by a complex enzymatic process. Simply put,
| the sun, or other light that produces UV-B, causes
| this process and not the prescence of a metal. There
| is no iron, or any other metal in anthocyanin.
| (Source: Mark Fisher)
| 
| There has been talk about limiting NO3 and jackin' up
| PO4 to bring out reds, but *I think* that has more to
| do with NO3-chlorophyll relationship making more
| green. In other words, there isn't less red just more
| green in the prescence of elevated NO3. (a little
| specualtion on my part;)
| 
| John Wheeler
| 
|  
|