For further research into the stomatal frequency and size we could conduct an

For further research into the stomatal frequency and

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increases its chances of capturing light and carbon dioxide in order to go through photosynthesis. For further research, into the stomatal frequency and size, we could conduct an experiment in order to test the energetic cost and fitness cost of having a large number of small stomata versus a small number of large stomata. This could provide information on how plant species have adapted to their different environments.
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References: Franks PJ & Farquhar GD (2007) The mechanical diversity of stomata and its significance in gas exchange control. Plant Physiology 143: 78-87 Mitton JB, Grant MC, Yoshino AM (1998) Variation in allozymes and stomatal size in pinyon associated with soil moisture. American Journal of Botany 85: 1262-1265 Sack L (2016) Lab 6: Transpiration Rate, Stomata and Leaf Venation. EEB 162L. Plant Physiology Lab Manual pp 30-36 Wullschleger SD, Wilson KB, Hanson PJ (200) Environmental control of whole plant transpiration, canopy conductance and estimates of the decoupling coefficient for large red maple trees. Agricultural and Forest Meteorology 104: 157-168
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Figures: Table 1. Transpiration rate of Heteromeles arbutifolia in different conditions. Control Length travelled (mm) Volume used (mm3) mL Rate (mL / minutes) Rate (uL / minutes) Average Percentage Difference from Control 5 1.5 20.8 0.02 0.004 4.2 4.2 0 Shade 5 1.5 20.8 0.02 0.004 4.2 10 2 27.7 0.03 0.005 5.5 15 2 27.7 0.03 0.005 5.5 5.1 0.2 Sunlight 5 3 41.6 0.04 0.008 8.3 10 3.5 48.5 0.05 0.009 9.7 15 4 55.4 0.06 0.01 11.1 9.7 1.3 Cold Wind 5 3 41.6 0.04 0.008 8.3 10 2.5 34.6 0.03 0.006 6.9 15 2 27.7 0.03 0.005 5.5 6.9 0.7 Table 2. Stomatal frequency and size in four different plant species. Species Abaxial Density (stomata/mm2) Average Abaxial Stomata Size (graticules) Average Abaxial Stomata Size (mm) Macadamia (Dicot) 316.384 17.5 graticules 0.044 mm Podocarpus (Gymnosperm ) 16.761 13.7 graticules 0.034 mm Poaceae (Monocot) 728.814 9.5 graticules 0.024 mm Polypod (Fern) 41.808 22.8 graticules 0.057 mm Figure 1. Plot of Secondary vein length per area vs. Leaf size in Platanus racemosa.
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Figure 2. Plot of Secondary vein length per area vs. Leaf size in Phillyrea angustifolia. Figure 3. Sketch of a Phillyrea angustifolia leaf and Platanus racemosa leaf showing the major vein orders.
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