Varariegated Plants

The green pigment involved in photosynthesis is chlorophyll. Chlorophyll is green in appearance because it absorbs red and blue light, making these colours unable to be seen. It is the reflection of the green light that reaches out eyes, giving chlorophyll a green colour. This green light that can be seen cannot be used by the plant for photosynthesis. Therefore, theoretically growth should be inhibited in the plants only exposed to green light.

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

Effect of inorganic carbon availability, using varying concentrations of bicarbonate treatments, on the photosynthetic activity of Egeria densa

An important part of photosynthesis is the intake of carbon; thus, it can be presumed that increasing the amount of available carbon will increase photosynthetic activity. In most plants there is an increased rate of photosynthetic rate, but it is limited by other factors and reaches a plateau (Lei H, Zhishan Z.

In this lab, four different types of leaves were tested to see the rate at which each leaf photosynthesized. This lab demonstrates how plants store light, capture light, and use light as energy for reproduction and growth, by photosynthesis. The control in this experiment was spinach, which was tested before any of the other plants were. The other plants that were tested were English Ivy, C4 Plant, and a multicolored plant. Each type of leaf was tested in a sodium bicarbonate solution and a solution of distilled water. It will be shown in the discussion whether the hypothesis made was correct or incorrect. It will be shown in the discussion what could have

To determine the effect of light on CO2 production for photosynthesis, the amount of light an Elodea plant received was inhibited with a mesh cloth while a second beaker of the same Elodea plant was exposed to the full light intensity. The purpose of this experiment was to then compare and determine if CO2 production would be decreased if direct light was inhibited.

In this lab, students did an experiment to figure out the amount of oxygen and carbon dioxide being produced during photosynthesis and respiration. First, they did an experiment in the light using spinach leaves. They put the spinach leaves in the chamber and turn the light on and start collecting the data in the computer. The rate of production of oxygen was high because of photosynthesis, however without light there were not photosynthesis happening, that is why there was more carbon dioxide being produced because of cellular respiration. The level of carbon dioxide increases steadily when the leaf is in the dark. The plant’s mitochondria are producing carbon dioxide gas as a by product of cellular respiration (which uses glucose

Abstract: Photosynthesis is an essential process which is a beneficial for both human and plants. To have a better understanding of this process will help know what plants require to speed up the process or what slows down the process. Carbon Dioxide plays a key role and determining whether or not it speeds up the process of photosynthesis very crucial. This experiment was done by thoroughly examining the photosynthetic activity of an aquatic plant Elodea Densa by increasing the concentration of CO2 and keeping the intensity of light and temperature constant. The main question for this study was to find out weather the amount of CO2 effects the photosynthetic rate. The data showed that there was no positive correlation between the amount of CO2 present and the photosynthetic rate.

However, the photosynthetic process can be affected by different environmental factors. In the following experiment, we tested the effects that the light intensity, light wavelength and pigment had on photosynthesis. The action spectrum of photosynthesis shows which wavelength of light is the most effective using only one line. The absorption spectrum plots how much light is absorbed at different wavelengths by one or more different pigment types. Organisms have different optimal functional ranges, so it is for our benefit to discover the conditions that this process works best. If the environmental conditions of light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will increase with average light intensity and under the wavelengths of white light which will correspond to the absorption spectrum of the pigments. The null hypothesis to this would be; if the environmental conditions light intensity, light wavelength and pigment type are changed, then the rate of photosynthesis will decrease with average light intensity and under the white light which will correspond to the absorption spectrum of the pigments.

Because chlorophyll-a takes in violet-blue, and orange-red lights to use in photosynthesis, it reflects green, and that is the color we see. This study investigates the relationship between the wavelength of light and the total respiration of the plant Elodea. The purpose is to see the effect of the presence or absence of certain wavelengths can have on the process of photosynthesis. Because Elodea is a plant that reflects green light, it can be assumed that red lights, the complimentary color to green will be absorbed the most contributing to the process of photosynthesis and respiration making the most oxygen.

Plant- Different species plants have different photosynthetic rates due to the different leaf structures of the plants. Even plants of the same species may have slightly different rates of photosynthesis since there may be more or less chlorophyll in the leaves to absorb light. The size of the plant is also important since this would affect the amount of surface area for gas exchange.

Photosynthesis is the conversion of light energy to chemical energy. There are many different factors that can affect the rate of photosynthesis, those being light intensity, the temperature of the water, the amount of carbon dioxide in the water, and the color of the light. In this experiment we chose to alter the color of light that was used in the process involving the aquatic plant Elodea while maintaining the other 3 factors. This experiment was conducted to see how much of an effect the color of the light played in the amount of carbon dioxide produced in the process of photosynthesis. We measured the amount of NaOH that was needed to color the water pink and then converted the net difference of drops into the net volume of carbon dioxide that was produced or consumed. The results showed that there was not a significant difference in the amount of carbon dioxide produced when using a standard regular colored light bulb compared to a green light bulb.

The object of this experiment was to study how different environmental conditions affected the rate of transpiration of a plant. The environmental factors we looked at were the affects of various temperatures and different light amounts in the different temperatures. We found that as the temperature warmed up, the rate of transpiration was higher. When the temperature was at five degrees Celsius, the rate of transpiration was very low. When we took out half of the light source and measured the rate of transpiration in the three temperatures we found the same variability of results as earlier where the cold temperature transpired less than the hot temperature but, with less light the overall transpiration rate was less all

Our lab investigated the morphological characteristics of leaves found in the sun and shade on various species of maple and oak trees around campus. Our null hypothesis was Acer and Quercus acclimate similarly with regards to SLW (specific leaf weight), size, and sinuosity. Our hypothesis was Quercus acclimation is greater than Acer SLW, size, and sinuosity. We tested these hypotheses by picking small sections of a branches from both maple and oak trees. A group was assigned either a maple or an oak tree, and needed a total of three different trees per group. Once three different trees were chosen, groups needed three shade leaves and three sun leaves of off each different tree. In total, each group should then end up with 18 leaves for testing. After collecting the leaves, we ran them through the LiCor 3100 leaf area meter to identify the area of each leaf. Major results found by the classes’ mutual data was each one of our p-values were greater than .05. This means that we failed to reject the null hypothesis. Thus, the lab results do not support our hypothesis that Quercus acclimation is greater than Acer SLW, size, and sinuosity.

The increase in mesophyll cells is not surprising, as having a readily available source of carbon dioxide would warrant more chloroplasts with photosynthetic chlorophyll are needed for increased photosynthetic activity to drive the Calvin cycle. In another study, as the number of mesophyll cells increased in the leaves of the birch trees clones, the amount of chloroplasts increase and gain in size, which aids in increased photosynthetic rates (Oksanen, et al., 2005). As photosynthesis occurs more rapidly, there is a need for more energy, which is met by the amount of mitochondria in the leaf cells being increased as a result of the increased carbon dioxide level. As the powerhouse of the cell, increased mitochondria could aid in stimulation of growth of new shoots of the birch tree, as well as an increase in photosynthesis and cell respiration. This suggests that trees that are exposed to increasingly higher levels of atmospheric carbon dioxide may grow more rapidly than those grown at current levels.