Botany online 1996-2004. No further update, only historical document of botanical science!
Dichroitic (Orientated) Phytochrome Molecules |
PR is oriented in parallel to the surface, PFR is vertical to it.
A: homogenous distribution at the cell surface. PR and PFR alternate.
B: Exposure to polarized bright red light (orange double arrow) causes a local difference in the orientation of PFR molecules (W.HAUPT, 1977). PR