Stomatal aperture as a characteristic response to environmental and experimental conditions


The problem of variability in stomatal responses, particularly aperture variance, to environmental and experimental conditions

by Spence R. D. (1987)

Richard D. Spence

in New Physiol. 107(2): 303 – 315. – DOI: 10.1111/j.1469-8137.1987.tb00182.x –


The extreme variability observed in stomatal responses to identical treatments has hindered the drawing of specific conclusions about how stomata respond to environmental factors and the mechanisms that drive these responses.

This review considers stomatal aperture as a characteristic response and the ramifications of the observed within-sample variance in aperture. In the wake of past research efforts, the efficacy of experimental techniques developed to observe stomatal aperture is reviewed, environmental, morphological and physiological factors that are thought to contribute to aperture variance are discussed, and the desirability of implementing procedures to reduce aperture variance is assessed. By taking into account these considerations, researchers may be better able to plan their future efforts.


Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

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