Photosynthesis And Plant Respiration

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Photosynthesis is a plant’s mechanism of converting sunlight and CO2 into energy in the form of organic material (Hohmann-Marriott and Blankenship 2011). Plant respiration is the process of using energy and oxygen to produce CO2 (Gonzalez-Meler et al. 2004). Almost all plants reproduce and respire, therefore it is important to know what factors could affect the rate of photosynthesis and respiration to better understand how plants function.
Some research has shown that elevated CO2 concentrations may determine plant productivity by affecting plant physiological processes, and ecosystem structure and functions such as photosynthesis ( Xu et al. 1987). However, other researchers have conducted experiments that found other results. Two plants,
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This is what we intend to do in our experiment to fill in the knowledge gaps concerning the correlation between the photosynthesis and respiration rates to the amount of CO2 a plant has been grown in.
The objective of our research was to determine how the rate of photosynthesis and respiration are affected by growing Brassica rapa FAST PLANTS in high and low CO2 concentrations. I hypothesized that the rate of photosynthesis and the rate of respiration will not have a significant difference in correlation to the concentration of CO2 that B. rapa was grown in because the stomatal density of the same plants grown in high and low CO2 concentrations did not have a significant difference (VanLaan et al. 2016
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Some of which were grown in high CO2 concentrations and some grown in low CO2 concentrations. The plants had been planted on October 17th and were ten days old when we preformed our experiment on them. The B. rapa seed variety is FAST PLANT seeds retrieved from Carolina Biological. The seeds were planted in a unique B. rapa soil, 4 pellets of fertilizer peer cell with 3 seeds per cell and 16 quads of 4 cells per shoebox tub with a wicking mat and water with anti-algal squares. Seedlings were thinned to one per cell three days after planting (Muilenberg et al. 2014). The only factor intentionally varied in this experiment was the CO2 content the plants were grown in, temperature, light, humidity, and soil nutrients all were controlled in the growing chamber. Each student group was assigned a different plant to assure that the same plant was not used more than once. 45 plants were used for each concentration CO2 making a total of 90 B. rapa plants used. The independent variable, or treatment, in this experiment was the CO2 concentrations of 350 ppm and 700 ppm the plants were grown in. The dependent variables were the respiration and photosynthetic rates of the plants. In conducting this experiment, we took one bundle of B. rapa from high CO2 concentration and one from low CO2 concentrations and measured the photosynthetic rates of each with a light shining on the leaves and the respiration

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