Spinach Hypothesis

Have you ever really wondered how different variables can affect how plants go through photosynthesis? Well, in this experiment, the purpose was to see how various environmental conditions can affect the overall photosynthetic capacity of a specific plant. The factors, light, darkness, cold, and heat were applied to see how the different components would affect the photosynthesis on spinach plants. Each group was given a different factor to test. Out group was given the light factor. The hypothesis for this experiment is that when adding light as a factor, the light will affect the overall plant photosynthesis.

The purpose of this lab was to see which level of light (measured in lux) made Spinacia oleracea (Spinach) leaf disks float the fastest. Our hypothesis was that an increase in light intensity will decrease the time it takes Spinacia oleracea disks to float. If light intensity is increased, then the time it takes Spinacia oleracea disks to float will be decreased. The mean for the no light (0 Lux) sample and the low light (4 x100 Lux) sample was 1200 seconds with no standard deviation because none of the disks in these two samples floated. The mean and standard deviation for the medium light (110 x100 Lux) was 902 seconds +- 84 seconds. The mean of the high light sample (410 x 100 Lux) was 692 seconds with no standard deviation because only two Spinacia oleracea disks floated so there was no need to measure the variability of the data. The final results indicated that the highest light intensity led to the quickest rise of Spinacia oleracea disks, supporting our hypothesis.

The ravg for the experimental group was 0.1613 and the ravg for the control group was 0.2047. The results indicated that our predictions were correct; duckweed that received less light exhibited a lower rate of

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.

My lab partners and I performed an experiment that involved placing spinach disks into separate cups of distilled water (dH2O) and 0.2% sodium bicarbonate (NaHCO3) solution to examine photosynthesis in leaf tissue (Department of EEB, 2015). Discovering that the spinach disks quickly floated to the top of the 0.2% NaHCO3 solution and not in dH2O, we wondered if varied concentrations of carbonation would affect the rate of photosynthesis (PS). We tested this by halving the 0.2% NaHCO3 solution (using equal parts dH2O and 0.2% NaHCO3 solution to make 0.1% NaHCO3 solution). I hypothesize that if the spinach disks are placed in the 0.1% NaHCO3 solution, then they will have a slower PS compared to the disks placed in 0.2% NaHCO3. CO2

The rate of photosynthesis is affected by environmental factors like light intensity, light wavelength, and temperature. This experiment will test the

Therefore, I was correct in my hypothesis that dark will have an effect on the germination of radish seeds. Also, I was very close in predicting that the seeds grown in the light will germinate twice as much as the seeds grown in the dark; the control seeds grew a little less than double the size of the experimental seeds. Ultimately, my experiment proved that light is a very important factor in the growth of any plant. However, I’ve learned that seeds grown in the dark will germinate, though slowly, as

Based on your data, draw a conclusion regarding how light intensity affects the rate of photosynthesis.

What is the relationship between the increase in light intensity and the photosynthetic rate in leaves from a corn plant? How does this relationship compare with what you observed for tomato plants?

This experiment demonstrates the effects of pH on the rate of photosynthesis by examining the behavior of leaf disks in different pH solutions under light. In this experiment, we used five different pH levels: pH 5, pH 6, pH 7, pH 8 and pH 9. These solutions were created using a combination of hydrochloric acid and sodium hydroxide. Spinancia olcerea or spinach, leaves were used in the experiment to examine the effects of pH on the rate of photosynthesis. The rate of photosynthesis was measured by counting the number of leaf disks that rose to the surface of the solution after each minute. In acidic solutions, the rate of photosynthesis increased while in basic solutions, the rate of photosynthesis decreased.

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.

Simple mimic light environment can fool the crops sometimes. On the experiment to postharvest cabbage and Arabidopsis they found that the clock control over glucosinolate accumulation can continue to function in postharvest cabbage and during 4◦C storage and the simple stimulus of light is sufficient to entrain the clock not only of postharvest cabbage but also of diverse noncrucifer postharvest vegetables and fruits (Goodspeed 2013). Liu and etc. also demonstrated that light/dark cycles during postharvest storage improved several aspects of kale, cabbage, green leaf lettuce and