Phytochromes control photomorphogenesis by differentially regulated, interacting signaling pathways in higher plants

Ferenc Nagy, Eberhard Schäfer

Research output: Contribution to journalArticlepeer-review

Abstract

In this review the kinetic properties of both phytochrome A and B measured by in vivo spectroscopy in Arabidopsis are described. Inactivation of phyA is mediated by destruction and that of phyB by fast dark reversion. Recent observations, describing a complex interaction network of various phytochromes and cryptochromes, are also discussed. The review describes recent analysis of light-dependent nuclear translocation of phytochromes and genetic and molecular dissection of phyA- and phyB-mediated signal transduction. After nuclear transport, both phyA- and phyB-mediated signal transduction probably include the formation of light-dependent transcriptional complexes. Although this hypothesis is quite attractive and probably true for some responses, it cannot account for the complex network of phyA-mediated signaling and the interaction with the circadian clock. In addition, the biological function of phytochromes localized in the cytosol remains to be elucidated.
Original languageEnglish
Pages (from-to)329-55
Number of pages27
JournalAnnual Review of Plant Biology
Volume53
DOIs
Publication statusPublished - 2002

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