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. 2021 Jan 30;197(4):867–883. doi: 10.1007/s00442-021-04857-3

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© The Author(s) 2021

Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 4 — Example stomatal morphologies and distributions alongside stomatal closing (a, b) and opening (c, d) kinetics expressed as absolute and relative values for a cycad (Cycas sinanensis), a basal angiosperm (Magnolia grandiflora), a eudicot angiosperm (Chenopodium quinoa) and a monocot (Arundo donax). The key for identification of species is given on the left-hand y-axis. The rate of change of stomatal conductance, G_s, during stomatal opening or closing (G_s50%) is determined from the initial 50% of the G_s response