Abstract
The moss Physcomitrella patens has become a powerful model system in modern plant biology. Highly standardized cell
culture techniques, as well as the necessary tools for computational biology, functional
genomics and proteomics have been established. Large EST collections are available
and the complete moss genome will be released soon. A simple body plan and the small
number of different cell types in Physcomitrella facilitate the study of developmental processes. In the filamentous juvenile moss
tissue, developmental decisions rely on the differentiation of single cells. Developmental
steps are controlled by distinct phytohormones and integration of environmental signals.
Especially the phytohormones auxin, cytokinin, and abscisic acid have distinct effects
on early moss development. In this article, we review current knowledge about phytohormone
influences on early moss development in an attempt to fully unravel the complex regulatory
signal transduction networks underlying the developmental decisions of single plant
cells in a holistic systems biology approach.
Key words
Bryophyte - cell cycle - homologous recombination - cell differentiation - auxin -
cytokinin - ABA
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R. Reski
Faculty of Biology
Plant Biotechnology
University of Freiburg
Schänzlestraße 1
79104 Freiburg
Germany
Email: ralf.reski@biologie.uni-freiburg.de
Editor: H. Rennenberg
