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The effect of temperature and KCl concentration on stomatal aperture in isolated abaxial epidermal strips of C. communis. Strips (15) were pre-incubated on the appropriate KCl concentration (25 cm3) at RT for 3 h and then transferred to the appropriate watch glass of KCl solution (2.0 cm3), which had been prechilled where necessary and incubated under a PPFD of 350 μmol m−2 s−1 for 1.5 h. Stomatal aperture was measured as described for Figure 3.
