Fig. 2
From: Effect of temperature stress on the early vegetative development of Brassica oleracea L.
Incidence of temperature on anatomical and functional characteristics of stomata in two cultivars of Brassica oleracea exposed to chilling (12 °C) and high (32 °C) temperatures. a. Number of stomata per mm2. b. Area of stomata (μm). c. Stomatal conductance measured with a leaf porometer. In all panels bars denote the mean of at least 20 measurements ± SE. Mean values within each cultivar with different letters are signifficantly different (P < 0.05)