Red (R) and far-red (FR) light are sensed by phytochromes, which exist in two inter-convertible forms, the R-light absorbing inactive form (Pr) and the FR-light absorbing active form (Pfr) (Smith, 1995).
Red (R) and far-red (FR) light are sensed by phytochromes, whichexist in two inter-convertible forms, the R-light absorbing inactiveform (Pr) and the FR-light absorbing active form (Pfr) (Smith,1995).