Botany1 Sci Paper
The Effect of Light Intensity on Photosynthesis and Transpiration
Inna V. Raymundo
BOTANY I Section V-6L
August 29, 2012
¹A scientific paper submitted in partial fulfillment of the requirements in Botany I laboratory under Dr. Nonnie Bautista, 1st sem, 2012-2013.
ABSTRACT Photosynthesis and transpiration both play important roles in plants. But there are factors which affect the rate of photosynthesis and transpiration. The external factor that was identified is the light intensity. It is crucial in the photosynthesis and the variation of its quality affects the photosynthetic rate. The effect of light intensity on photosynthesis and transpiration was determined by counting the number of bubbles in high and low light intensities. The rate of photosynthesis is the number of bubbles produced. The experiment showed that the higher the light intensity is, the greater is the rate of photosynthesis and transpiration.
INTRODUCTION Photosynthesis All living things need energy to survive. The sun is our main source of energy but the energy provided by it does not directly provide us the energy we need to completely survive. In plants, they absorb radiant energy and convert it into chemical energy. This process is called photosynthesis. Photosynthesis can be considered the ultimate source of life for nearly all plants and animals by providing the source of energy that drives all their metabolic processes. In the process of photosynthesis, the carbohydrates are synthesized in CO2 and H2O in the presence of sunlight and chlorophyll and O2 is released (Ruben and Kamen, 1957). The chloroplasts of plants capture light energy that has travelled 160 million kilometers from the sun and convert it to chemical energy stored in sugar and other organic molecules (Campbell and Reece, 2002). This process is directly dependent on the supply of water, light, and carbon dioxide. Limiting one of the factors can limit photosynthesis
Inna V. Raymundo
BOTANY I Section V-6L
August 29, 2012
¹A scientific paper submitted in partial fulfillment of the requirements in Botany I laboratory under Dr. Nonnie Bautista, 1st sem, 2012-2013.
ABSTRACT Photosynthesis and transpiration both play important roles in plants. But there are factors which affect the rate of photosynthesis and transpiration. The external factor that was identified is the light intensity. It is crucial in the photosynthesis and the variation of its quality affects the photosynthetic rate. The effect of light intensity on photosynthesis and transpiration was determined by counting the number of bubbles in high and low light intensities. The rate of photosynthesis is the number of bubbles produced. The experiment showed that the higher the light intensity is, the greater is the rate of photosynthesis and transpiration.
INTRODUCTION Photosynthesis All living things need energy to survive. The sun is our main source of energy but the energy provided by it does not directly provide us the energy we need to completely survive. In plants, they absorb radiant energy and convert it into chemical energy. This process is called photosynthesis. Photosynthesis can be considered the ultimate source of life for nearly all plants and animals by providing the source of energy that drives all their metabolic processes. In the process of photosynthesis, the carbohydrates are synthesized in CO2 and H2O in the presence of sunlight and chlorophyll and O2 is released (Ruben and Kamen, 1957). The chloroplasts of plants capture light energy that has travelled 160 million kilometers from the sun and convert it to chemical energy stored in sugar and other organic molecules (Campbell and Reece, 2002). This process is directly dependent on the supply of water, light, and carbon dioxide. Limiting one of the factors can limit photosynthesis
Cited: Campbell, N.A. and J.B. Reece. 2002. Biology. 6th ed. California: Benjamin and Cummings Pub. Co. Inc. pp. 176, 759-761. Whiting, David, et.al.2009.Plant Growth Factors: Photosynthesis, Respiration and Transpiration. GardenNotes. Madriaga, E., Lee, A., Ventura, F., 1994. Biology. Rex printing company. pp. 20, 91,94. Ruben, S. and M. Kamen. 1957. Journal of the American Chemical Society 63: 877-879. Sterling, T., Ph.D. 2004. Transpiration-Water Movement Through Plants. Zafaralla, M.T., et.al. 2007. Explorations in Plant Science. pp. 63-66. Henderson State University. Separation of Pigments by Paper Chromatography. Retrieved from: http://www.hsu.edu/pictures.aspx?id=1653