1. Why is the genus Flaveria a good model to study photosynthesis? The genus Flaveria is a good model to study photosynthesis because the plant is going through evolutionary changes with some species in their C4, C3 and C4&C3 in-between (intermediates) states lead to tracing its genetics .
2. What is photorespiration and why is it a problem in C3 plants? Photorespiration is located in the mesophyll cells and happens when the plant is in hot conditions leading to the stroma to close off preventing water loss (cause plants shrink) and not preventing O2 to diffuse through the cell. Thus creating and uptake in the concentration of O2 leading to the RuBP to bonded to O2 instead of CO2 producing a molecule that is useless to the cell while not
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How have C4 plants solved the problem of photorespiration? C4 plants solved the problem of photorespiration by using new methods involving special bundle sheath cells. So as the CO2 diffuses into the mesophyll cell in goes to a number of transformations ultimate leading to the formation of Glycine. Then Glycine is transported to the bundle sheath cells where the Calvin Cycle is completed. Furthermore, the bundle sheath has a low concentration of oxygen and high concentration of carbon dioxide which in turn does not allow the Rubisco to have a chance of bonding to oxygen allowing for the overall production of glucose.
4. What is the photorespiratory pump and what does it do in C3-C4 intermediates? The photorespiratory pump refers to the transport of the of the Glycine into the Bundle Sheath. In C3-C4 intermediates, photorespiration by refixing photorespired CO2 released in the bundle sheath cell allowing for there to be a concentration of CO2.
5. Why is establishment of a photorespiratory pump considered a key evolutionary step in the transition from C3 to C4 photosynthesis? The establishment of the photorespiratory pump is considered a key evolutionary step in the transition from C3 to C4 photosynthesis because the pump mostly eliminates the photorespiration of a plant from
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What is the role of glycine decarboxylase enzyme in the photorespiratory pump in C3-C4 intermediates? What reaction does it catalyze and how does it make photosynthesis more efficient in the C3-C4 intermediates? Why is it a benefit for C3-C4 intermediates to produce this enzyme in the bundle sheath cells? Glycine decarboxylase enzyme(GDC) gene is expressed in a different way in C3-C4 intermediates which makes them only produced in the bundle sheath. The role of GDC is to decarboxylate Glycine thus leading to Oxygen being used in the Calvin Cycle. It is beneficial to produce this enzyme in the bundle sheath because it is impermeable to CO2 allowing for there to be a high concentration within the breadth sheath in turn preventing O2 from interfering with the cycle. This makes Photosynthesis more efficient because the cycle will produce a carbohydrate at the end instead of a molecule that has no benefit to the
Photosynthesis occurs each time the sun’s light reaches the lives of a plant. The chemical ingrediants for photosynthesis are carbon dioxide (CO2), a gas that passes from the air into a plant via tiny pores, and water (H20), which absorbed from the soil by the plant’s roots. Inside leaf cells, tiny structures called chloroplasts use light energy to rearrange the atoms of the ingrediants to produce sugars, most importantly glucose (C6H12O6) and other organic molecules. Chlorophyll gives the plant its green color (Simon, 02/2012, pp. 92-93). Chemical reactions transfers the sun’s light energy into the chemical bonds that hold energy-carrying molecules. The most common are
Both photosynthesis and cellular respiration are the main pathways of energy transportation in organisms. However, the reactants and the products are exact opposites in photosynthesis and in cellular respiration.
In light reactions, light is absorbed by chlorophyll in the thylakoid membrane and energizes the electrons. ATP is created from ADP and P. NADP accepts electrons and turns in to NADPH, which is energy. Once the light reactions have taken place, the light-independent, or ‘dark’ reaction occurs in the stroma, where CO2 is converted to sugar. The
photosynthesis happens in two stages: light reaction and carbon fixation also known as calvin cycle.light reaction TAKES PLACE IN THYLAKOID USE light energy to produces atp and nadph whereas, calvin cycle takes place instroma uses energy derived from light dependent reaction to make GA3P from CO2 ( Bio166 lab execise manual, 2015). the purpose of this experiment was to separate plant
Water- Water is required in the photosynthetic reaction. When plants lack water, their stomata close to prevent further water loss. At the same time, closing the stomata cells doesn't allow CO2 to diffuse into the leaf. Water is also therefore, linked to the carbon dioxide factor.
The process of photosynthesis, by which light energy is used to convert inorganic compounds into organic substances with the release of oxygen, may be the most important biological event sustaining life (Keir et al. 2017). In the light-dependent reactions, the chloroplasts of a plant use the pigment chlorophyll to convert light energy into chemical energy. This energy is used to split water and produce oxygen (Eller et al. 2015). The energy is later used in the light independent reactions, where carbon dioxide (CO2) undergoes carbon fixation with the aid of enzyme rubisco, because it catalyses both carboxylation and oxygenation reactions and most of responses of photosynthesis to light, CO2, and temperature (John Evans 2013).
Photosynthesis is a huge concept to learn and understand in the field of biology. Plants have their own special way of using the ATP they produce. Photosynthesis is a process where plants harness the sunlight they receive and they produce carbohydrates, as well as oxygen for living things and other plants. Now the sunlight ultimately powers the process of
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.
Photosynthesis is a very complicated process. It is not as simple as plants need a little sunlight, water, and carbon dioxide, and viola oxygen is produced. There are many steps and processes that occur during photosynthesis which make it very complicated. Now the actual word photosynthesis in Greek means photo- “light”, and –synthesis “putting together”. This is the overall basic foundation that photosynthesis stands behind. Photosynthesis can only happen in plants and some algae, due to them having an organelle called chloroplast. Chloroplast has a pigment, which is called chlorophyll. Chlorophyll is a light absorbing pigment, which allows the plant to control solar energy and use it to distribute energy and food for the plant itself. Chloroplasts are usually located in the green tissue in the interior of the leaf called the mesophyll. A usual cell has around thirty to forty chloroplast. In the inner compartment there is a thick fluid called the stroma, with a system of interconnected membranous
First, the three reactants of photosynthesis are Carbon Dioxide, Water, and Sunlight. These are the three things that a plant needs to survive. Carbon Dioxide is what plants breath in, we breath out carbon dioxide and they release oxygen, so it is a exchange sort of. Water is what keeps the plants hydrated so they can function. Also plants need sunlight because they turn light into their food, so it is important for the process of photosynthesis.
Photosynthesis and cell respiration are some of the two most important biological processes that organisms go through. Photosynthesis is the biological process plants undergo to convert light energy into chemical energy. In chloroplasts the chlorophyll act as catalysts for this process. The process uses carbon dioxide (CO2) and Water (H2O) in order to produce glucose (C6H1206) and oxygen (02). Thus, it is read as 6CO2 + 6H2O —> C6H12O6 + 6O2. Photosynthesis is split into two different processes. The first process is light Dependent meaning i uses energy being absorbed to break down and molecules at a rapid photosynthetic rate. The second process is Light Independent meaning it uses ATP and NADH absorbed during when light was present to breakdown glucose instead. Therefore, Healthy plants are green because Chlorophyll absorbs red and blue light, but reflects green light signifying stored light.Some Anaerobic bacteria undergo photosynthesis meaning it can’t grow in oxygen and uses Carbon Dioxide and other substances like hydrogen sulfide to photosynthesis. In general all plants need Carbon Dioxide. (Ensminger, 2014)
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
Without photosynthesis we would not be able to receive energy. We should be more appreciate of plants, without them we would not survive. This paper will explain the basic components require for photosynthesis, the role of chlorophyll, how energy is transferred, and photosystems I and II and the most precious product results of photosynthesis.
To metabolic pathways involved in photosynthesis are light reaction and dark reaction. The first stage of the photosynthetic system is the light-dependent reaction, which converts solar energy into chemical energy. Light absorbed by chlorophyll or other photosynthetic pigments is used to drive a transfer of electrons and hydrogen from water to and acceptor called NADP , reducing it to the form of NADPH by adding a pair of electrons and a single proton. The water or some other donor molecule is split in the process. The light reaction also generates ADP, a process called photophosphorylation. ATP is a versatile source of chemical energy used in most biological processes. The light reaction produces no carbohydrates such as sugars.
Food and fuel supply need to increase in order to adequately satisfy current and future populations (Tilman et al., 2011). It has been proposed that improvements to photosynthesis are likely to be a part of the way in which this demand can be met but first a more thorough understanding of the different carbon fixing mechanisms needs to be obtained (Sinclair et al., 2004). There are different methods by which plants fix carbon. Most plants fix carbon using either the C3 or C4 pathways. C4 photosynthesis involves the operation of a carbon concentrating mechanism (CCM) across mesophyll and bundle sheath cells by adding an initial carboxylation reaction in the mesophyll and decarboxylation reaction in the bundle sheath. This increases photosynthetic efficiency by concentrating CO2 around the final carboxylase ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBisCO) in order to increase the average carboxylation rate of RuBisCO (Vc) and supress the energetically wasteful photorespiration pathway (Jordan and Ogren, 1983).