Growth, Differentiation and Sexuality

derstanding of how these perceive and transmit
the signals, and how they interact is largely lacking.
The availability of an increasing number of
genomes, and the constant improvement of molecular
methods open the possibility for reverse genetic
approaches and should allow a rapid increase
of our knowledge in the future.
Acknowledgements. We thank J. Yu for helpful discussion,
J. Yu, E. Polak, S. Kilaru and W. Chaisaena for sharing unpublished
data, N. Read for Fig. 14.7D, and K. Vienken
for genome analyses. Work of R. Fischer’s laboratory was
funded by the DFG (SFB395), the University of Marburg,
the Max-Planck-Institute for Terrestrial Microbiology, Marburg,
and the special program “Lebensmittel und Gesundheit”
of Baden-Würtenberg. Work by U. Kües’ research
group was funded by the ETH Zurich, the Swiss National
Science Foundation (grant 31-59157.99) and the Deutsche
Bundesstiftung Umwelt.
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