3). 30 seconds . Record the calculated total surface area here: _____ 3. A potometer measures how factors such as light, temperature, humidity, light intensity and wind will affect the rate of transpiration. Tags: Question 9 . The leaf wilts completely in this case. There is a close inter-relationship between transpiration and leaf structure. Stomata shielded by hairs. Wind: higher winds increase the rate of transpiration. 10. The more the number of stomata per unit area of leaf, the greater is the transpiration. It decreases transpiration rate. Experiment to Compare the rate of transpiration from both the surfaces of leaf by Garreau’s Potometer: the roots, A IF, was also 6 atm. answer choices . Transpiration is the loss of water vapour through evaporation from a plant’s surface.It mainly happens through gaps in the leaf called the stomata, which need to open during the daytime to allow gas exchange.Plants need to take in carbon dioxide for photosynthesis and get rid of oxygen, which happens through the stomata. The user above me has also a valid statement too ... but it will be more than it was without the rolling up of the leaf. e. Divide the total mass of the leaves by the mass of l cm2 to find the total leaf surface area. To do this, divide the rate of transpiration (step 1) by the total surface area. Xerophyte adaptations to reduce transpiration ... Spines instead of leaves to reduce surface area for transpiration. 9. These rate … provided the transpiration rate was low (0.4 g/dm^ leaf/hour) but when the transpiration rate was raised threefold, Afr, rose steeply to a value of 12 atm., a steady state value being approached in about 8 hours (see Fig. Solution:-(a) False. 4. Whereas the desert plants with thick cuticle and sunken stomata have low rate of transpiration. It increases transpiration rate. (iv) Voltmeter is an instrument used for measuring the rate of transpiration in green plants. (f) Any two parts of a leaf which allow transpiration (g) The structure in a leaf that allows guttation (h) Loss of water as droplets from the margins of certain leaves. Calculate the rate of transpiration/surface area. Q. Transpiration is. 2. To measure the rate of transpiration we use a piece of equipment called a potometer. Tightly packed cells in the upper half of the leaf containing many chloroplasts ... Humidity: the lower the humidity the faster the rate of transpiration. The main type of potometer is the ‘bubble’ potometer shown in the figure below. The unit of transpiration rate is the moles of water lost in per leaf area per time (mol/cm2/s). Plants regulate the rate of transpiration by opening and closing of stomata (Figure 5.14). Root shoot ratio: Transpiration increases with root shoot ratio. The genus Oryza , which includes rice ( Oryza sativa and Oryza glaberrima ) and wild relatives, is a useful genus to study leaf properties in order to identify structural features that control CO2 access to chloroplasts, photosynthesis, water use efficiency, and drought tolerance. the movement of water through a plant from the roots up the stem ... Q. Leaf structure: The leaves with surface stomata, thin cuticle have high rate of transpiration. Greater is the value of resistance; slower will be the transpiration rate. (c) An instrument used to find the rate of transpiration (d) A plant in which the stomata are sunken (e) The apparatus to record the rate of transpiration in a cut shoot. Give a suitable explanation for the following: (a) A higher rate of transpiration is recorded on a windy day rather than on a calm day. Types of Transpiration. On reducing the transpira-tion rate… A majority (90%) of transpiration takes place via leaf surface, and a process refers as “Foliar transpiration”. Tags: Question 8 ... Stomata in rolled leaves. Rolled up leaves reduces the surface area exposed to the lower water potential in the environment therefore reducing rate of transpiration as rate of diffusion is lowered. SURVEY . (b) Potometer is an instrument used for measuring the rate of transpiration in green plants. This experiment proves that the rate of stomatal transpiration is fairly higher than the cuticular transpiration. Transpiration. 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