Found it interesting, thought I'd share.

"A surplus of light like the strong UV radiation in high mountains causes drastically reduced elongation of the internodes, a decrease of the assimilating surface, often to a strongly enhanced production of anthocyanes and usually also to intensely coloured flowers."

"the growth of lettuce seedlings is not influenced by the subsequent exposure to light of the wave lengths lambda = 658 nm and lambda = 768 nm, while the exposure to both wave length at the same time increases growth."

So what can the phytochrome system do for me? Oh not much, just

Inhibition of the elongation of the hypocotyl
Inhibition of translocation from the cotyledons
Increase of the surface area of the cotyledons
Unfolding of the cotyledonsâ?? lamina
Development of hairs at the hypocotyl
Opening of the hypocotylâ??s hook
Development of the primary leaves
Development of mature leaf primordia
Increase in the negative geotropic reaction of the hypocotyl
Development of xylem elements
Differentiation of the stomata within the epidermis of the cotyledons
Development of super-etioplasts in the cotyledonsâ?? mesophyll
Changes in the intensity of the cell respiration
Synthesis of anthocyane in the cotyledons and the hypocotyl
Increase in the synthesis of carotenoids
Increase in the capacity of the chlorophyll synthesis
Increase in the RNA synthesis within cotyledons
Increase in the protein synthesis within cotyledons
Intensification of the storage fat breakdown
Intensification of the Storage protein breakdown
Increase in the synthesis of ethylene
Acceleration of the Shibata-shift within the cotyledons
Determination of the cotyledonsâ?? capacity to photophosphorylate
Modulation of the cotyledonsâ?? enzyme synthesis

More:
Botany online: Plant Responses - Light - Photomorphogenesis, Phytochrome
Opie Yutts Reviewed by Opie Yutts on . The concept of the red / far-red system (phytochrome system) Found it interesting, thought I'd share. "A surplus of light like the strong UV radiation in high mountains causes drastically reduced elongation of the internodes, a decrease of the assimilating surface, often to a strongly enhanced production of anthocyanes and usually also to intensely coloured flowers." "the growth of lettuce seedlings is not influenced by the subsequent exposure to light of the wave lengths lambda = 658 nm and lambda = 768 nm, while the exposure to both wave length Rating: 5