Transpiration In Plants Essay

1309 words - 6 pages

Transpiration is the process that allows plants to release H20 in the form of water vapor into the atmosphere. This process mostly occurs during the time the stomata, the microscopic pores on the surface of a leaf, are open for the passage of CO2 and O2. Transpiration plays a huge role for plants, as 90% of the water that enters the plant is through transpiration. It also allows the plant to receive key nutrients and minerals in order to survive. By transpiring, or evaporating, it causes the plant to suck up more water from its roots, causing a constant flow of water through the plant, which is optimal for survival. If transpiring were to terminate, then the plant would continue to ...view middle of the document...

Water is then lost to the air from these mesophylls, causing a great negative pressure in the air-water interface. In order to reduce this pressure, water molecules from the more hydrated parts of the plants are pulled upwards toward this area to lessen the tension. Once water lost from the air reaches the leaves, it diffuses through tiny whole called stomata, which allow the plants to breathe. As more water escapes, more water is drawn up from the xylem by suction pressure.In order to defy such gravity pulling within the plant, there must be special properties that allow it to do so. Such special properties lie within water. Its special properties include cohesion, adhesion, as well as surface area. Cohesion is due to hydrogen bonding, making it possible to pull without the water molecules breaking. As water molecules exit the xylem, it tugs on adjacent water molecules, as it is repeated molecule by molecule, causing an endless chain of molecules sticking to each other as it pull upward. Another property of water is the property of adhesion, which is the ability of a substance to stick to another substance other than itself. Since the walls of the xylem walls are hydrophilic, the hydrogen bonds within water attach itself strongly to these walls, allowing it to stick and travel upwards. Surface tension of water also plays a role in this upward pull. Surface tension is a measure of how difficult it is to break or stretch the surface of a liquid. Since water has such a high surface tension due to hydrogen bonding, they are arranged orderly, hydrogen-bonded to one another and to the water below. All these factors enable water to defy gravity and flow upward in the plant in order to reach the leaf.Many factors contribute to the process of transpiration in a very important way. However, one of the most important factors is the ability for plants to regulate themselves. If regulation did not occur, and evaporation took place too often, the plant would release to much water and lack water within the plant, causing it to die. Or if the plant did not transpire enough, the plant would hold too much water causing too much pressure in many areas, also causing it to die. Plants control water gain and loss by opening and closing their stomata. The stomata have two guard cells surrounding it, which opens or closes depending on whether it is becoming more or less turgid. When these guard cells take in water from neighboring cells, they become more turgid and bowed. It is oriented in such a way that the guard cells buckle outwards when turgid, causing the size of the pore to increase. When cells lose water and become flaccid, the are less bowed and the pore closes. Turgor pressure, which...

Other Essays On Transpiration In Plants

essay that is supper sis for you and all your friends - Heritage Glen - Assignment

1304 words - 6 pages specific function. Transgenic Organism:​ an organism whose genome has been altered by the transfer of a gene or genes from another species or breed: transgenic mice. Transpiration: ​ is the process where plants absorb water through the roots and then give off water vapor through pores in their leaves. Tumour:​ a swelling of a part of the body, generally without inflammation, caused by an abnormal growth of tissue, whether benign or malignant. Vaccination:​ treatment with a vaccine to produce immunity against a disease; inoculation.

deforestation and watershed lab report - science-grade 9 - lab report

3241 words - 13 pages , as river water and ultimately resulting in permanent drying. I hypothesized this because I know that forests transport relatively large quantities of water into the atmosphere, via transpiration by plants. This furthermore replenishes clouds while simultaneously commencing the precipitation that maintains the forests. Furthermore, I also hypothesized that the clear-cut watershed would have a greater waterflow than that of the reference forest, I

Why Martin Luther King Jr gave his "I Have a Dream" speech - Ridgeland High School and Oral Communication - Informative Speech

1914 words - 8 pages . nitrogen fixation c. decomposition b. excretion d. denitrification b. excretion d. denitrification ANSWER: A 28. Carbon cycles through the biosphere in all of the following processes EXCEPT a. photosynthesis. c. burning of fossil fuels. b. transpiration. d. decomposition of plants and animals. ANSWER: B 29. How is carbon stored in the biosphere? a. in the atmosphere as carbon dioxide b. underground as fossil fuels and calcium carbonate rock c. in

Geography physical notes leaving cert - Leaving cert - Research

3027 words - 13 pages consult their Advising Examiner before awarding marks. A key word may be awarded marks, only if it is presented in the correct context. e.g. Question: Briefly outline how water from the soil reaches the leaf. Marking scheme - concentration gradient/ root hair/ osmosis/ cell to cell/ root pressure/ xylem/ cohesion (or explained)/ adhesion (or capillarity or explained)/ Dixon and Joly/ transpiration or evaporation/ tension any six 6(3

Persuasive Essay Gay And Lesbi

623 words - 3 pages . As stated in the Constitution of the United States, "All people are created equal." These organizations are fighting for equality. We all deserve the same basic rights whether we are gay, straight, black, or white. No one deserves to be judged, discriminated against, or treated unfairly. These groups also try to strengthen the gay and lesbian movement at the state and local level while connecting these activities to a national vision of change.All

Mark Mcgwire Vs Sammy Sosa

1206 words - 5 pages Sammy Sosa's statistic's because they haven't been in the league the same amount of time. The only way to fairly evaluate and compare these two individuals is to truly wait until they have both retired from baseball. Today we can only compare them to what they have done to today. McGwire and Sosa's hitting average over all is very close. McGwire has a .265 and Sosa has a .264. At the rate their going Sosa will probably have a better

Master and slave. an analysis

495 words - 2 pages Each of the characters in The Tempest finds themselves in bondage. However, by the end of the story, the same characters are set free from whatever enslaves them. A few characters one can see enslaved are Prospero, Miranda, Ariel, and Caliban.Prospero is in bondage to his magic. Since his exile by his brother from his dukedom in Milan, he has had but a few books to help pass the twelve long years. During this time, he becomes very proficient in

Methods Of Therapy

2480 words - 10 pages METHODS OF THERAPY Therapy, from a psychologist's viewpoint, has many different meanings. It can be physical or psychological, or even both. In this paper, several different aspects of therapy will be discussed. First the word therapy will be defined more clearly, and then psychotherapy and how it differs from other interactions yet is also similar. Next therapy will be examined from the Psychodynamic, Cognitive and Humanistic-Existential points

Phineas And Gene A Comparitive

1538 words - 7 pages Phineas and Gene: A Comparative Study Throughout the story, Phineas and Gene, the two main characters, showed a number of contrasting traits. Phineas was a confident, non competitive, naive, irresponsible, and unintelligent person throughout the story, whereas Gene, Phineas' roommate, was insecure, competitive, mature, responsible, and intelligent throughout the story.Phineas had a confident nature in everything he did. As Phineas and Gene first

Mafia

2008 words - 9 pages . In 1903, Nicola Gentile, a native of Siculiana, Sicily, finding no occupation in his village, came to America as a stowaway on a ship to soon begin his life full of crime. Although barely able to read and write, he believed that he possessed an uncommon strength of will to be sinister. This trait would soon help him to rise to the high rank in the Mafia. After arriving in America, he was amazed at the grand vastness of the buildings and streets

Baseball Strike

1354 words - 6 pages . Small market teams are rising to power with their demands while large market team owners are finding it hard to deal with the teams and their issues, while still trying to please the players. In essence, it is a three - way battle between the two sides of large and small market owners and the players. Neither side is showing any sort of sympathy for the other side. They are sticking with their proposals without any thoughts of changing them

Similar Papers

Discuss The Xylem And Phloem. (Structure, Changes In The Xylem Of Woody Plants, Transport)

996 words - 4 pages walls of xylem conducting cells are complete they die. The contents within the cell disintegrate and leave a strong hollow cylinder filled with water. Water can travel in kind of a straight line due to the fact that these cells are stacked on top of each other. Tracheids are conducting cells of primitive vascular plants and they're long and extremely thin cells. Important in the transport is rays. Rays run from the center of the tree laterally

The Importance Of Hydrogen Bonds In Living Organisms Biology Essay

636 words - 3 pages The importance of hydrogen bonds in living organisms Hydrogen bonds are of great importance throughout living organisms. They are weak and formed between hydrogen atoms and other atoms, normally oxygen, which are nevertheless cumulatively strong. An example of hydrogen bonds is between water molecules in the process of cohesion tension which occurs in plants during transpiration. As water evaporates from mesophyll cells in the leaf into air

French A Level Human Influence On The Environment Ao4 French Research

635 words - 3 pages water, when they are cut down, water runs straight into rivers, causing flooding. also, the local climate gets drier as there is much less transpiration occurring. · Disturbance of the balance of carbon dioxide and oxygen When trees die, carbon dioxide is naturally released. When they are burnt, all the carbon dioxide is released at once. alternatively, if wood is used in furniture the carbon is stored and not released, disrupting the carbon cycle

The Importance Of Ecosystem Services Environmental Science Essay

1237 words - 5 pages Essay: written by student Charlotte Discuss ways in which farmers may control the environment of crop plants and animals to increase productivity/maximise crop yields To capitalise on the productivity of plants and animals in an agricultural environment there are several steps which a farmer can take to improve growing conditions and therefore yield. By providing optimum conditions for growth factors such as temperature and nutrient supply and