Exposed To Light After A Set Period Of Etiolation Experiment
1. Introduction
Etiolation is a process which occurs in plants which are grown without light. This process increases the chance of a plant to reach the light and to actually photosynthesise. Certain characteristics occur with plants grown in the dark, these are:
• Long, weak stems - Due to etiolation a plant can increase the possibility that it will reach a light source, often it will have to go higher. Therefore the stems are often longer. The stems are also strongly attracted to light and it will actually elongate towards the light.
• Longer internodes – As shown on the right, plants have three nodes. The internode is the space in between the nodes. Plants grown in the dark have much longer internodes. This can be explained, as the stems
…show more content…
The hormone cytokinin causes this after the exposure of light. Chloroplasts contain chlorophyll and due to this the plant turns green.
1.1 Research question
For this experiment, I want to find out what will happen to cress seeds that are etiolising (growing in the dark) when they are then exposed to light. To conduct this experiment, I came up with the following research question:
‘Will exposure to light after a set period of etiolation cause a plant to de-etiolize?’
2. Hypothesis
If a plant is exposed to light after a set period of etiolation, then a plant will de-etioize and the production of chloroplasts instead of etioplasts will be stimulated.
2.1 Motivation
Plants that have etiolation, have etioplasts. Due to the lack of light, there is a lack of chlorophyll and the plant turns yellowish. After being exposed to light, the etioplasts will be stimulated to develop into chloroplasts. These chloroplasts contain chlorophyll and this causes the plant to turn green. The plant will de-etiolize seeing as the etioplasts are replaced for the chloroplasts and the plant will not etiolize anymore, it will photosynthesise.
3. Procedure
3.1
Lesser Celandine Research Paper
1698 Words | 7 PagesIt is a short-day plant and tends to flower and bear fruit earlier in spring than most native species and this allows it to grow better with little to no competition (Huebner et al., 2006; Axtell et al., 2010; Kertabad et al., 2013). When lesser celandine grows, it tends to form in patches of green marsh that inhibit the growth of native plant species and shortly after these green marshes form it drops green sepals exposing bright yellow flowers (Axtell et al., 2010; Kertabad et al., 2013). The flowering process of lesser celandine is controlled by a few indication variables such as; water availability, light reception, and temperature (Axtell et al., 2010). It is an unusual plant when it comes to reproduction as it is a dicotyledon, but it only produces monocotyledon seedlings (Kertabad et al., 2013). Lesser celandine may use aerial bulblets for reproduction, but it primarily reproduces through subterranean bulblets or tubers (Axtell et al.
Spinach Leaf Chromatography Lab Report
1386 Words | 6 PagesAnalysis: The chromatography paper revealed that chlorophyll a, chlorophyll b, carotenes, and xanthophylls, are present in a spinach leaf. This is because a plant needs several different types of pigments in order to photosynthesize properly while simultaneously protecting itself from the dangers of too much sunlight. Chlorophyll a is the primary photosynthetic pigment in all plants, however, all of the other pigments are important as well because they are the ones that provide extra layers of protection in order to shield the plant from harm. Discussion/conclusions: I accept my hypothesis because the data from the lab revealed that a spinach leaf does not only have chlorophyll, although that is all we can see with our naked eye, but also contains carotenes and xanthophylls that help to protect it. One thing I learned through this lab is that chlorophyll, although it is very important to the plant, it is not the only pigment that is important.
Chemical Reactions Lab Report
1029 Words | 5 PagesPhotosynthesis consists of two stages, the light reactions and the dark reactions. The light reactions convert light into energy (ATP and NADHP) Occurs in thylakoid stacks of grana Sunlight is converted into ATP (free energy containing molecule) and NADPH (high energy electron carrying molecule) Chlorophyll absorbs light energy and starts a chain of
Germinated Seeds In The Dark Essay
387 Words | 2 PagesWe accept our hypothesis of the germinated seeds in the dark and the dormant seeds in the dark having a higher rate of cellular respiration then germinated seeds in the light and the dormant seeds in the light. The germinated seeds in the dark had 0mL of change in oxygen levels while the germinated seeds in the light had -.05mL of change in their oxygen levels. The germinated seeds in the dark had a .05mL more for their change in oxygen then the germinated seeds in the light, therefore the germinated seeds in the dark had a higher rate of cellular respiration then the germinated seeds in the light. The dormant seeds in the dark had 0mL of change in their oxygen levels and the dormant seeds in the light had -.16mL of change in their oxygen levels. The dormant seeds in the dark had a .16mL greater change in their
Invasive Species In The Mojave Desert
597 Words | 3 PagesAlien plants include flowers used only for the purpose of landscaping and plants that hail from other regions that are not from the desert. Humans are the ringmasters of furthering the spread of invasive species. 90% of the cause of tortoise decline is obtained from human activity. Nonnative seeds attach to our vehicles, clothes, and pets. Consequently, the seeds fall on native soil and occupy vacant space, preventing native plants to grow properly.
Photosynthesis/Scientific Method Worksheet
201 Words | 1 PagesPhotosynthesis/Scientific Method Worksheet 1. State and explain your pre-experience hypothesis: We were supposed to place (Elodea) in two tubes, which one should closer to a light source and the other with no light on it. The experience consisted in observe and count the amount of bubbles coming out from the plant in both tubes.
Germinated Peas Inspire Synthesis
412 Words | 2 PagesThe purpose of this lab was to measure the amount of CO2 gas given off by germinated peas under certain conditions of light. We conjectured that the more amount of light the peas are exposed to, the higher the respiration rate they will have. Our data supported this because it showed that the germinated peas that were exposed to light 24 hours before the experiment had a steeper slope (as seen in table 1), therefore having a greater respiration rate. The peas that were not exposed to any light 24 hours before the experiment had a reduced rate because of its lack of exposure to light. Both pea’s respiration rates showed that the more light the peas were exposed to, the greater respiration rate they would have (Figure 1).
Spinach Leaf Photosynthesis
970 Words | 4 PagesPurpose: The purpose of this experiment is to see how long it takes for the 10 spinach leaf discs to undergo photosynthesis and thereby rise in the two solutions. Hypothesis: All of the leaf discs in the sodium bicarbonate solution should be floating before the discs in plain water because the bicarbonate is a carbon source that will allow photosynthesis to continue. Background: Light is absorbed by leaf pigments (chlorophyll) which makes electrons within a photosystem moved to a higher energy level.
Spinach Leaf Photosynthesis Lab Report
1169 Words | 5 PagesHypothesis: If four lights (UV Light, LED Light, Infrared Light, and Blue Light) are used to perform photosynthesis on a spinach leaf, then the spinach will respond most to the blue light and perform a more efficient photosynthetic process.
Metabolism Exam Paper
1281 Words | 6 PagesAlexandra Fowler Due: 10/25/2015 Metabolism Exam Answer the following questions as completely and concisely as possible. Some answers may be a single word, but for more detailed responses, keep you answer to 3 sentences or less. What is the electron donor of an organism growing chemorganotrophically? The electron donor of an organism growing chemorganotrophically is an organic compound such as glucose, acetate, etc.
Isolation In Flowers For Algernon
1743 Words | 7 PagesTwo Ends of the Spectrum: Behavioural Isolation It’s a scenario that is common, if not heartbreaking. Someone who is different is ridiculed, taught to try and hide what him or her unique, and grows up hating who they really are. In America, young girls are taught that “beautiful” means light-skinned, blue-eyed, and blond-haired; in China, beautiful exemplifies pale skin, long, glossy black hair, and big eyes- because that is what surrounds us. That is the norm.
Bees: A Case Study
970 Words | 4 PagesOnce light bypass the sun leaves through their large sinuses, shade leaves have large surface area to allow light to penetrate onto their leaves, hence why there is more surface area and smaller sinuses in shade leaves. 2.c) When observing the difference value in
Compare And Contrast Cellular Respiration And Photosynthesis
420 Words | 2 Pagesphotosynthesis and cellular respiration are extremely important in the cycle of energy to sustain life simply because nutrients would not metabolize in a productive manner. Both have numerous stages in which the process of energy occurs, and relationships with organelles located in the eukaryotic cell. Photosynthesis is a process by which green plant and other organism manufacture their food using sunlight to synthesize foods from carbon dioxide and water while cellular respiration is the oxidation of organic compounds that occurs within cells, producing energy for cellular processes. Photosynthesis occurs within organelles called chloroplasts. These organelles can absorb light, and are located inside of leaves.
Raisin In The Sun Symbolism
793 Words | 4 PagesRegarding the circumstances the plant will not grow as they do not have the ‘“sunshine” to do
Effect Of Light Intensity On The Rate Of Transpiration
1950 Words | 8 PagesResearch Question: How does the presence of light impact the rate of transpiration in plants? Aim: The aim of this experiment was to investigate how the presence of light affects the rate of transpiration in plants. Hypothesis: As light intensity increases, the rate of transpiration (water uptake) in a plant increases.
More about Exposed To Light After A Set Period Of Etiolation Experiment
Lesser Celandine Research Paper
1698 Words | 7 PagesSpinach Leaf Chromatography Lab Report
1386 Words | 6 PagesChemical Reactions Lab Report
1029 Words | 5 PagesGerminated Seeds In The Dark Essay
387 Words | 2 PagesInvasive Species In The Mojave Desert
597 Words | 3 PagesPhotosynthesis/Scientific Method Worksheet
201 Words | 1 PagesGerminated Peas Inspire Synthesis
412 Words | 2 PagesSpinach Leaf Photosynthesis
970 Words | 4 PagesSpinach Leaf Photosynthesis Lab Report
1169 Words | 5 PagesMetabolism Exam Paper
1281 Words | 6 PagesIsolation In Flowers For Algernon
1743 Words | 7 PagesBees: A Case Study
970 Words | 4 PagesCompare And Contrast Cellular Respiration And Photosynthesis
420 Words | 2 PagesRaisin In The Sun Symbolism
793 Words | 4 PagesEffect Of Light Intensity On The Rate Of Transpiration
1950 Words | 8 Pages