How carbon dioxide can affect the rate of photosynthesis

Photosynthesis is the conversion of light energy to chemical energy into sugars. It is the process in plants that uses carbon dioxide, water, and sunlight from its surroundings and releases oxygen as a byproduct (6H2O+6CO2+light energy -> C6H12O6+6O2). Photosynthesis is required for plants because they are autotrophs, organisms that make their own food. Plants require a specific environment that is ideal to them to be able to carry out the process. Environmental conditions can either increase or decrease the rate of photosynthesis. Things like colors of light, pH, and temperature can all affect the rate of photosynthesis in plants.

Introduction: Photosynthesis can be defined as a solar powered process that removes atmospheric carbon dioxide and transforms it into oxygen and carbohydrates (Harris-Haller 2014). Photosynthesis can be considered to be the most important biochemical process on Earth because it helps plants to grow its roots, leaves, and fruits, and plants serve as autotrophs which are crucial to the food chain on earth. Several factors determine the process of photosynthesis. Light is one these factors and is the main subject of this experiment. The intensity of light is a property of light that is important for photosynthesis to occur. Brighter light causes more light to touch the surface of the plant which increases the rate of photosynthesis (Speer 1997). This is why there is a tendency of higher rates of photosynthesis in climates with a lot of sunlight than areas that primarily do not get as much sunlight. Light wavelength is also a property of

The purpose of this lab is to observe the effect of white, green, and dark light on a photosynthetic plant using a volumeter and followed by the calculation of the net oxygen production using different wavelengths color of white and green light, and also the calculation of oxygen consumption under a dark environment, and finally the calculation of the gross oxygen production.

The purpose of this experiment was to investigate the effects of light intensity on the rate of photosynthesis in a Moneywort plant. By observing the plant in distilled water mixed with sodium bicarbonate, different light bulbs were targeted onto the plant. The measurement of the amount of bubbles present on the plant during the trial of the experiment enabled us to identify the comparisons between the activity of the light and the process of photosynthesis.

-Measuring the pH of a solution (such as in the lab we had) could also help determine the rate of photosynthesis. You would need a much more specific pH meter, but generally, if pH goes down, the level of CO2 is higher, meaning more cellular respiration. Higher pH means there’s less CO2, so more photosynthesis.

* By using the dropper and measuring cylinder, 7 ml sodium carbonate solution was added to the test tube

mL cylinder to the beaker on the stir plate and empty it into the beaker. Place the pH probe in the beaker and record the pH in the data table. Drag the beaker to the red disposal bucket. Double-click the bottle of NaHCO3 to move it to the Stockroom counter. Repeat steps 5 and 6 for KNO3.

• Design a scientific experiment to determine the effect of the variable on the rate of photosynthesis for the organism

Measure 500ml of tap water in the 500cm3 beaker, then measure 5g of sodium hydrogen carbonate using the 50cm3 beaker and weight scale and place in the beaker of water, using the glass rod to dissolve it into the mixture.

4.Measure 35mL of warm water and add them into each of the 4 test tubes at about roughly the same time. It is essential that the water is warm. Do not seal the test tube.

The intention of this experiment is to determine the effects of pH on the rate of photosynthesis in living leaves. Photosynthesis is a process by which plants convert light energy captured from the sun into chemical energy which they use to perform various plant functions. During the photosynthesis process, light, carbon dioxide, and water react to produce products: sugar and oxygen. The equation for photosynthesis is:

Plants occur around the world in a wide variety of environments, but how does the environment affect photosynthesis rate? Temperature, light intensity, water supply, and the amount of carbon dioxide are all factors that contribute photosynthesis rate. For the lab on photosynthesis, our group tested the Anacharis Bunch plant, which is an aquatic plant that needs moderate light in order for photosynthesis to occur (“Anacharis (Egeria densa)”). For photosynthesis to take place, energy from the sun is required. When sunlight strikes a plant, the stoma opens and carbon dioxide along with energy from the sun are absorbed into the chlorophyll as well as water which is transported up through the leaves to the chloroplasts where the chlorophyll are located. The chlorophyll then uses carbon dioxide, water, and the sun’s energy to produce to sugars such as glucose. After the glucose is produced, the energy that is stored in the glucose is then used to form ATP, which is carried throughout the plant and into the chloroplast where the energy is used for photosynthesis and other cellular functions. As a byproduct of synthesizing, a plant releases oxygen and water into the air. Then the cycle of photosynthesis which is made up of two parts, the Light Reactions and the Calvin Cycle, start all over again (“A Primer on Photosynthesis”). To figure out the rate at which the Anacharis Bunch plant photosynthesizes under different conditions, my group and I decided to test the

Measure 50ml of Sodium Hydroxide and pour in to the burette (use funnel, and remove after use).

For all living organisms including plants, respiration is the process of converting chemical energy into a usable form of energy (Biol 171L Lab 7). Even if an organism does not have an energy source, they will keep respiring. For autotrophic plants, the process of obtaining energy is called photosynthesis. It harvests solar energy, carbon dioxide, and water to form a usable form of energy (Tanaka 2009). The factors that go into this process includes the pigment the plant possesses, and the intensity, wavelength, and direction of the light. Plants that contain the pigment chlorophyll-a are the ones we see as the leaves of common trees, or grass.

Water can be kept a constant by keeping the same amount of water in the beaker. Temperature- Enzymes are used in photosynthesis and the respiration of the plant. Therefore, increasing the temperature will increase enzyme reaction and the photosynthetic rate until a certain point is reached when the enzymes denature. The temperature can be kept somewhat a constant by performing the experiment in one session, when the air temperature shouldn't change enough to affect water temperature. A transparent glass block will also be placed in front of the lamp to retain some of the heat from the lamp.