Light for vegetative growth vs flowering?

[Magnus A]

Hello

This is a statement Ross made recently in another thread

"The higher the number - the more it is designed for growth of leaves. The yellower it is the more it is designed for flowering."

I would like to have some references for this, becouse:

Light is absorbed and converted to usefull energy in the plants Photosystem I and Photosystem II. In this processes there is NO differentiation in red and blue light. The light is absorbed in an ANTENNA system and the ENERGY is transfered to the reaction centre. As the energy needed to make the reaction center work is quantified and all excess enrergy is lost as heat the system does not care if the light is blue or red. The Photosystem creates the energy carriers (NADPH and ATP) that the plants use for living. There is NO other light driven reactions in the plants that create energy for the plants.

What is the explenetion for the above statement?

I think but I do not know!
That the light intensity and the heat radiation from the different colored lightsource was significant different. That is the reason that it has been observed an different under badly controled experiments. This IF an experiment ever was performed....

The blue and red light gave different temperature and different light intensities that the plants reacted on NOT the wavelenght......


Why do I bring this up? Just becouse my own interest in rupicolous laelias and Sophronitis seams to indicate that they only flower realy good when they are abused with very high light intensities OUTDOOR and it seems that it is the blue to Ultraviolet light that is needed to initiate good flowering not the light. I have an thought that the light protection mechanism, were the plants "take care of" high energy light (blue and particular UV) create some metabolites that initiate flowering.... (temperature could also play me a joke but I think I see a difference in lants that is in the shade and in full sun on the same balcony, to few observation to draw any conclusion)


It got some what long nad a little to scientific but what do you think about this???
Ross is the blue vs red light just something that comes from an old orchidgrower that everyone lissened to and that thsi persons statement was always taken as the truth?


/Magnus

Sorry for any spelling misstakes