Copy of Plant Transpiration Lab.docx - AP Bio Plant Transpiration Lab Question How does temperature affect the rate of transpiration in a Golden Pothos

Copy of Plant Transpiration Lab.docx - AP Bio Plant...

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AP Bio Plant Transpiration Lab Question: How does temperature affect the rate of transpiration in a Golden Pothos plant? Hypothesis: We believe that the higher the temperature, the higher the rate of transpiration in a Golden Pothos plant. Discussion: We believe that the higher the temperature, the higher the rate of transpiration in a Golden Pothos plant. After close observations, it is clear that temperature is directly related with the rate of transpiration. Our hypothesis was proven correct. In order to vary the temperature of the air surrounding the plant and keep the wattage of light on the plant the same, a CSL bulb that was equivalent to a 100 Watt incandescent and an actual 100 Watt incandescent. When using the
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CSL bulb, the temperature around the leaf was 25.8 degrees Celsius and the transpiration rate was about 0.00131 mL/hr/cm ². With the incandescent the temperature around the leaf was 28.5 degrees Celsius and this leaf had a transpiration rate of 0.00336 mL/hr/cm². Thus, the data shows that even a slight, three degree increase in temperature will significantly increase the transpiration rate of the leaf. The science behind this is that with the amount of light (amount other variables) held constant, the varied temperature of the air around the leaf produced different transpiration rates. Cooler air has a higher relative humidity than warmer air, meaning
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