All Physics Faculty Publications
Dynamics of Stomatal Patches for a Single Surface of Xanthium Strumarium L. Leaves Observed with Fluorescence and Thermal Images
Document Type
Article
Journal/Book Title/Conference
Plant, Cell, & Environment
Volume
28
Issue
5
Publisher
Published by Wiley-Blackwell in Plant, Cell, & Environment
Publication Date
5-2005
First Page
633
Last Page
641
Abstract
Fluorescence and thermal imaging were used to examine the dynamics of stomatal patches for a single surface of Xanthium strumarium L. leaves following a decrease in ambient humidity. Patches were not observed in all experiments, and in many experiments the patches were short-lived. In some experiments, however, patches persisted for many hours and showed complex temporal and spatial patterns. Rapidly sampled fluorescence images showed that the measurable variations of these patches were sufficiently slow to be captured by fluorescence images taken at 3-min intervals using a saturating flash of light. Stomatal patchiness with saturating flashes of light was not demonstrably different from that without saturating flashes of light, suggesting that the regular flashes of light did not directly cause the phenomenon. Comparison of simultaneous fluorescence and thermal images showed that the fluorescence patterns were largely the result of stomatal conductance patterns, and both thermal and fluorescence images showed patches of stomatal conductance that propagated coherently across the leaf surface. These nondispersing patches often crossed a given region of the leaf repeatedly at regular intervals, resulting in oscillations in stomatal conductance for that region. The existence of these coherently propagating structures has implications for the mechanisms that cause patchy stomatal behaviour as well as for the physiological ramifications of this phenomenon.
Recommended Citation
J.D. West, D. Peak, J.Q. Peterson, and K.A. Mott, “Dynamics of Stomatal Patches for a Single Surface of Xanthium Strumarium L. Leaves Observed with Fluorescence and Thermal Images,” Plant, Cell & Environment 28, 633-641(2005).
https://doi.org/10.1111/j.1365-3040.2005.01309.x
Comments
Publisher PDF available through link above. Publisher requires a subscription to access article.