English to German Science Botany

The phytochrome photosystem includes the two interconvertable forms of phytochromes, Pr and Pfr, which
have their sensitivity peaks in the red at 660 nm and in the far-red at 730 nm, respectively [1]. Photomorphogenetic
responses mediated by phytochromes are usually related to the sensing of the light quality through the red (R) to farred
(FR) ratio (R/FR) [1]. The importance of phytochromes can be evaluated by the different physiological responses
where they are involved, such as leaf expansion, neighbour perception, shade avoidance, stem elongation, seed germination
and flowering induction [1]. Although shade-avoidance response is usually controlled by phytochromes through
the sensing of R/FR ratio, the blue-light and PAR level is also involved in the related adaptive morphological responses [1].