W. Beyschlag et J. Eckstein, Towards a causal analysis of stomatal patchiness: the role of stomatal size variability and hydrological heterogeneity, ACTA OECOL, 22(3), 2001, pp. 161-173
The induction of the well known and widespread phenomenon 'stomatal patchin
ess' has been attributed to a variety of potential causes: from low PPFD le
vels, all kinds of stress conditions to CO2-changes and even fungal infecti
ons. A mechanism which explains the occurrence of reproducible patterns of
static (i.e. stable) stomatal patchiness at low PPFD levels is proposed. Fu
rther, experimental evidence is presented for the hypothesis that dynamic (
i.e. not stable) stomatal patchiness is a consequence of heterogeneous wate
r status in different parts of the leaf and can be induced by all ambient f
actors which cause such heterogeneities. (C) 2001 Editions scientifiques et
medicales Elsevier SAS.