yep...it's phytochrome mediated shoot elongation i think though.
Phytochromes are plant photoreceptors which detect red and far-red light.
The proportion of far-red light a plant receives is increased if the light
has passed through or been reflected from a "canopy" of other plants. This
induces the spindly growth mentioned previously
"Colin Mitchell Beier" <cbeier at vt.edu> wrote in message
news:8phhsk$9f6$1 at solaris.cc.vt.edu...
> is this phenomenon at all related to cytochrome mediated shoot elongation?