  We explore the possibility of putting constraints on quintessence models with
large-scale structure observations. In particular we compute the linear and
second order growth rate of the fluctuations in different flavors of
quintessence scenarios. We show that effective models of quintessence (e.g.
with a constant equation of state) do not account of the results found in more
realistic scenarios.
  The impact of these results on observational quantities such as the shape of
the non-linear power spectrum in weak lensing surveys or the skewness of the
convergence field are investigated. It appears that the observational signature
of quintessence models are specific and rather large. They clearly cannot be
mistaken with a change of (\Omega_{0}).
