Summary
It is known that kinetin and abscisic acid affect stomatal aperture. A statistically significant interaction between kinetin and abscisic acid at concentrations of abscisic acid between 10-5 and 10-6M is demonstrated for barley. It is suggested from this and other work that the results obtained may only be true for graminaceous species and not for other monocotyledons or for dicotyledons.
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Cooper, M.J., Digby, J. & Cooper, P.J. Effects of plant hormones on the stomata of barley: A study of the interaction between abscisic acid and kinetin. Planta 105, 43–49 (1972). https://doi.org/10.1007/BF00385162
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DOI: https://doi.org/10.1007/BF00385162