This research was conducted to investigate light intensity effects on lucky bamboo vegetative growth in Azad University, Abhar Branch during 2008. The experiment was arranged as a complete randomized block design with 5 treatments (0.75, 1.14, 1.89, 2.29 and 4.09 µmol∙m-2∙s-1) in 10 replication. Results showed that 1.89 µmol/m-2/s-1 had significant differences from others treatments. The higher level of root number, shoot length and total weight of plants were obtained in 1.89 µmol∙m-2∙s-1 reatment. Number of shoot, shoot length and number of leaf per shoot were differ in different nodes and were highest in upping nod.
Seedlings characteristics are during the growth time as a crucial factor in determining the ultimate fate of the plants. Therefore should be tried always seedlings have to very good condition. Seedling growth and quality are under influenced by environmental factors including light intensity (Lavendar, 1984). If environmental factors such as light intensity changes, also are under affect other factors and final quality of seedlings (Chaar et al., 1997). Seedling producers with changing and optimizing the light intensity regulated the seedlings growth, development, and plant vegetative quality (Lavendar, 1984).
Lucky Bamboo with the scientific name Dracaena sanderiana has owned to Dracaenaceae family. This variety of dracaena does not belong to real bamboos of the Poaceae family. This plant are popular because beautiful leaves and robustness to apartment conditions. This plant is among plants that allowed indirect and low light intensity. So they classified in plants group with low light need (Brown, 2008). Brown (2008) reported ...
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...results of this experiment showed that Lucky Bamboo is including Plants that have required too little light intensity. High light intensity can be cause yellowing of leaves. If want of results these experiments have a general recommendation for keeping these plants in apartment thus can say Because the total amount of light produced by sodium lamps with 400 watts at 3 meters distance is equivalent to 19 µmol s-1m-2. So use of a sodium or fluorescent lamp with 40 watts can to provide power equal to 1 / 9 µmol s-1m-2 for the plant (Barzegar & Yadegari, 2010). As that observed of this experiment the best treatment of light intensity for the optimum growth in Lucky bamboo plant is equivalent energy to 1 / 89 µmol s-1m-2. Can also provided light intensity needed for this shade-friendly plant with use a 40-watt incandescent lamp at a three meters distance apartment.
Two members of the group were instructed to visit the laboratory each day of the experiment to water and measure the plants (Handout 1). The measurements that were preformed were to be precise and accurate by the group by organizing a standardized way to measure the plants. The plants were measured from the level of the soil, which was flat throughout all the cups, to the tip of the apical meristems. The leaves were not considered. The watering of the plants took place nearly everyday, except for the times the lab was closed. Respective of cup label, the appropriate drop of solution was added to the plant, at the very tip of the apical meristems.
The effect of water quality on Vegetative measurements and photosynthesis indices of the trees are presented in Table 1. No significant differences were found between parameters: gs, shoot number in both years, but others were higher in RW application. Height of trees and leaf area in first year was not significant but in second year it increased by 42 and 29% respectively in application RW. Photosynthesis rate appears significantly higher (23.4 µmol m−2 s−1) in plants receiving recycle water than clean water.
Hawaii is such a diverse and unique area that it is said to be a biologist’s paradise. Biologists travel here to study the wide variety of species and one such species is Aleurites moluccana or the kukui tree. The kukui tree is originally from Southeast Asia, particularly the Indo-Malaysia region, and has moved its way into the Pacific. It was first introduced to the Hawaiian islands when the Polynesians navigated their way here hundreds of years ago (Elevitch, C. R., & Manner, H. I., 2006). Since then, the kukui tree’s physical adaptations have helped it to thrive in Hawaii and native Hawaiians were able to utilize this plant in a number of ways.
Investigating the Effect of Light Intensity on the Size of a Plantain Leaf Title: To investigate the effect of light intensity on the size of a plantain leaf. Hypothesis: I predict that the size of the plantain leaves would increase as the light intensity decreases. Therefore, plantain leaves found in the shade will have larger surface areas than leaves found in an open area. Theory: Sunlight is an essential factor need to complete the process of photosynthesis.
Experiment #1: The purpose of this experiment is to investigate the effects of baking soda and light intensity on the rate of photosynthesis of green spinach leave through the observation of floating disk.
The Effect of Light Intensity on the Rate of Oxygen Production in a Plant While Photosynthesis is Taking Place
In this laboratory, the degree of absorbance for the pigments in a leaf sample were observed using mechanisms that involved pigment isolation from a leaf extract, obtaining wavelength measurements, and displaying the measurements on an absorption spectra.
Multiple perspective of any kind requires a unique way of telling a story. Especially from individuals and different viewpoints on the same event. This story gives the audience seven narrators that tell each their side of the matter in the same event and all seem to contradict themselves. This is an interesting plot device from which inconsistent testimonies of the same experience can be shown and looked at. Which narrator is true, which narrator is telling a lie; it is curious to read the differences and some of the same “facts” reported by these witnesses? How can their stories are based on truth and where are the lies. Again, there is a wider range to these individual stories share. Namely who did it,
Instead I will vary the light intensity the plant is provided with. I will do this by placing the light at different distances from the aquatic plant. I also thought about varying the wattage of the lamp I will be
the effect light has on the growth of pea plants. It will take place in an environment with controlled light, with equal amounts of plants being grown in the light and in the dark. All elements of the experiment other than light will be kept the same, such as amount of seeds in each pot, amount of soil in each pot and amount of water given to each plant each day. This will ensure a fair experiment. Prediction: I predict that in general, the plants grown in the light will grow better than those grown in the dark.
Photosynthesis is, “the process by which plants convert light energy from the Sun into chemical energy in the form of carbohydrates” thus producing, “food for all living organisms, directly or indirectly” (Zheng). Photosynthesis has been examined in thousands of different ways. Many of these experiments include studying the rate of photosynthesis and pigment accumulation by obtaining plants and then stressing their light and nutrient intake (Okunlola and Adekunle). Photosynthetic pigments reflect and absorb different wavelengths of visible light based off their polarity. In this experiment, we studied photosynthetic pigments, first, by determining polarity and then, by measuring the amount of light of a given wavelength that a pigment absorbs. We used two methods in this experiment, chromatography and spectrophotometry. Chromatography “is a method used to separate mixtures of substances into their components” (lab book) and spectrophotometry is the use of a spectrophotometer to measure transmittance of light through a liquid. We used our knowledge of polarity to predict that since the least polar pigments move the most, pigment 1 is chlorophyll b, pigment 2 is chlorophyll a, pigment 3 is an anthocyanin, pigment 4 is a xanthophyll, and since most polar pigments move the least, pigment 5 is
The reason light intensity is being used compared to whether or not a plant needs light. It is because The experiment wants to show that the rates of photosynthesis will vary according to how much light from a light bulb will be trapped in. the chloroplasts, in the leaf. The more energy trapped the more efficient a chemical reaction can take place and the speed of photosynthesis will increase. There are many things which can affect the photosynthesis of a plant such as light intensity, temperature and carbon dioxide levels.
Increases in temperature can decrease the efficiency of photosynthesis; however the extent of this impact may be determine on the species' dependency on light.
In the lab exercise regarding plant structure and function, we examined slides containing the different kinds of roots (monocot, dicot). We labeled the parts and pointed out the different roles of each in the plant structure. Also, we examined monocot stems and dicot stems in order to familiarize ourselves with its external and internal structures. We sketched and labeled the parts of the stem and looked closely at the positions of each part. In the last part of the lab, we classified leaves into different kinds according to their leaf venation, bases of leaves, and apices of leaves. As an additional exercise, we sketched 20 animals and classified them according to phylum and class. We were also able to discover the scientific and common names of the animals. Overall, the exercises we did enabled us to familiarize ourselves with plant structure thus, gaining a better understanding for plant life and its importance.
This is the same if there is the light intensity is too high as this can damage the chloroplasts in plants and this will minimize the rate of photosynthesis. As shown in the graph as the light intensity increases, the photosynthesis rate increases until a point is reached where the rate begins to level off into a plateau. At a low light intensity, photosynthesis occurs slowly because only a small quantity of ATP and NADPH is produced. As the light intensity shown in the graph is gradually increasing, more ATP and NADPH (NADH is used in cellular respiration and NADPH is used in photosynthesis) are produced, which means more oxygen and sugar is produced, therefore increasing the rate of photosynthesis. But as the light intensity increases even more and past a certain light intensity on the graph, this is due to the other factors such as carbon dioxide limiting the rate of