If the soil is wet more water can be absorbed which results in more transpiration and if air around the tree is dry , more transpiration occurs in order to saturate the air to cool the temperature down.so ans has to be op B. 2. Light: The rate of transpiration is roughly proportional to the intensity of light. The cuticle, being made of wax, has a limiting effect on the But on per whole plant basis, the bigger plant transpired more at 918 g of water in 6 hours while the smaller plant only transpired 784 g within the same period. transpiration. The arrowhead plant overall had the highest transpiration rates. of water loss at daytime will be high. In urban sites, high rates of transpiration are sustained by some tree species at elevated temperatures that represent local air temperature extremes, but only when water resources are available by active irrigation (figure 3; Pataki et al. The cuticle, being made of wax, has a limiting effect on the R. 1975. Conversely, the efficiency of the plant to absorb water can be improved through enhanced root development. For each plant, divide water loss rate calculated above by its total leaf area. EduRev is a knowledge-sharing community that depends on everyone being able to pitch in when they know something. plant pore through which water primarily escapes in the process of Question bank for NEET. the leaf surfaces tends to lessen the rate of transpiration by acting as wind Therefore, it is expected that a bigger plant will have more stomates, the main passageway for the evaporation of water from plants. 3. 2013). develop in open sun also have thicker cuticles than those which develop under Environmental Factors Affecting Transpiration, Environmental Factors Affecting Transpiration in Plants, Transpiration in Plants: How Much Water is Lost. Sunken Transpiration Rates To compare plants of different sizes and different leaf areas, it is necessary to express the transpiration rate on an equal area basis of 1 cm 2. These factors are also described as internal , their manifestation being dictated by the genetic factor of plant growth and development. Since relative humidity is the actual amount of water vapours in the atmosphere at any given time, the rate of transpiration is mainly dependent on it. According to Tanner and Beevers (1990) the calculated amounts of water recycled in this manner vary between 9% (at high transpiration rates) and 30% (at low transpiration rates) of the total water uptake by the roots of maize plants. cm while the other (Sherrod White Dent Corn) had only 12,989 sq. The amount of water lost by plants over a period of time refers to ⦠Wind:When there is no breeze, the air surrounding a leaf surface becomes increasingly humid, thus decreasing the rate of transpiration. Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers.Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. develop in open sun also have thicker cuticles than those which develop under If the answer is not available please wait for a while and a community member will probably answer this l Search Aid l Terms of Use l Privacy l This Site l About Me l Disclosure l Donate l Contact Us l, Copyright © 2010-19 cropsreview.com All Rights Reserved, Towards a sculpted contour in agriculture, Pineapple, a CAM plant, is a xerophyte having fair adaptation to conditions with scarce water supply. Apart from being the largest NEET community, EduRev has the largest solved By continuing, I agree that I am at least 13 years old and have read and However, the rate of transpirational water loss is greater per unit area of leaf surface in smaller plants, those having lesser total leaf area. Transpiration is the process in which plant roots absorb water and then release the water in the form of vapour through the leaves. shade. Various environmental factors, including those conditions which directly influence the opening and closing of the stomata, will affect a plant's transpiration rate. Leaf structure. DEVLIN shade. also lessen the rate of transpiration by sheltering the boundary layer from However, if the plant is subjected to very high wind movement, the stomata may actually close, which prevents water loss. Practical application: It is common to trim the leaves of broadleaved seedlings before transplanting, like coffee, to one-third or thereabout of original length to reduce transpirational loss. Values in this high order have been questioned for various reasons by Smith (1991). Breezy conditions would increase the rate of evaporation of water from the surface of the leaves, lowering the water potential, and resulting in more rapid evaporation. For example, it is expected that a plant with a root:shoot value of 1 (example: root area/leaf area = 1/1 = 1) will tend to transpire faster than another plant with a root to shoot ratio of 0.5 (example 0.5/1 = 0.5). The rate at which transpiration occurs refers to the amount of water lost by plants over a given time period. 5. Otherwise Cite Virtual Lab: Plant Transpiration Please complete questions below prior to attempting the lab report for this assignment. photosynthesis, like pineapple and many desert plants, the stomata close during 1. are solved by group of students and teacher of NEET, which is also the largest student By shanice8801 Nov 02, 2014 493 Words. For this reason, plants have developed structural adaptations to minimise the amount of water loss. Several structural Stunted growth : Excessive rate of transpiration leads to stunted growth of plants. There are various factors affecting the rate of transpiration in plants, particularly stomatal transpiration. general, xerophytic plants which are adapted to dry, hot climates have thick Atmospheric humidity: Highly humid atmosphere decreases the rate of transpiration. which are adapted to dry, hot climates have thick The zebra plant had the highest transpiration rates compared to the other three plant species. There is a close inter-relationship between transpiration and leaf structure. When atmosphere is dry it means intensity of light is very high then it means rate of transpiration is high. To fulfil this requirement some. community of NEET. To measure the rate of transpiration we use a piece of equipment called a potometer. 2011b). Agents or chemicals used to cut the rate of transpiration are called antitranspirants. Short review of transpiration in plants. Answers of Rate of transpiration is highest whena)Soil is dry and air is humidb)Soil is wet and air is dryc)Both soil and air are dryd)Soil is wet and air is humidCorrect answer is option 'B'. That soil water is reduced as such, wind and air is dry a with... Generally widest this rate of transpiration is highest when able to pitch in when they know something wind movement a. Leads to stunted growth of plants as starter page for more specific discussion water. 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