5. When stomata are open, transpiration rates increase; when they are closed, transpiration rates decrease. Request PDF | Reduced atmospheric pressure in Radish: Alteration of NCER and transpiration at decreased oxygen partial pressures | Fundamental to the future of ⦠With decrease in atmospheric pressure, the rate of transpiration will (a) increase (b) decrease rapidly (c) decrease slowly (d) remain the same. It causes decrease in the rate of transpiration.
IV. ... A higher rate of transpiration is recorded on a windy day rather than on a calm day. Transpiration rates decrease proportionally to the amount of humidity in the air. Special cells called guard cells control each poreâs opening or closing. Low RH also favors faster transpiration due to stronger atmospheric demand. With decrease in atmospheric pressure, the rate of transpiration will (a) increase (b) decrease rapidly (c) decrease slowly (d) remain the same Solution 2: (a) increase Question 3: The rate of transpiration is more when (a) atmosphere is dry (b) temperature is high (c) humidity is high (d) atmosphere is dry and temperature is high Solution 3: What conditions will decrease the rate of transpiration? Air that is humid does not accept water vapor easily, and drier air makes it easier for a plant to release water by evaporation through the stomata on its external surfaces. Tension created by loss of water due to transpiration can be observed with the help of an instrument called potometer. (v) Atmospheric pressure: The reduction of atmospheric pressure reduces the density of the external atmosphere. It is because atmosphere is more saturated with moisture and retards the diffusion of water vapour from the intercellular spaces of ⦠Since relative humidity is the actual amount of water vapours in the atmosphere at any given time, the rate of transpiration ⦠Decrease in temperature, increase in humidity, no or reduced air movement and low light intensities. The rate of transpiration ⦠In this study, daily atmospheric pressure and evaporation data observed in the Ercan Meteorological Station located in Northern Cyprus were used. during period of high transpiration, the diameter of stem increases. (5) Atmospheric pressure : Lowering of atmospheric pressure reduces the density of the air. Availability of Water: The rate of transpiration depends upon the rate of absorption of soil water by roots. Transpiring leaf continuously adds water vapour to the atmosphere. If the rate of transpiration increases, the rate of absorption of water by the root increases too. External factors. Question A.3. Thus, rate of transpiration increases with the decrease in atmospheric pressure. Wind velocity. This allows more rapid diffusion of water. Relative humidity: Increase in atmospheric humidity decrease the rate of transpiration Wind : More the wind velocity in the atmosphere more is the rate of transpiration Water Content of the soil : Sufficient availability of water in the soil allows stomata to remain open and thus helps transpiration to continue at a faster rate | EduRev Class 10 Question is disucussed on EduRev Study Group by 143 Class 10 Students. Decrease rapidly c. Decrease slowly d. Remain the same. 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