Question

Which is used to measure the rate of transpiration?
(A) Atmometer
(B) Psychrometer
(C) Potometer
(D) Porometer

Answer 1

The method of motion of water through a plant and leading to the evaporation of water from the leaves is acknowledged as transpiration. The evaporation of water takes the region through the aerial components of the plant life such as shoots, leaves and additionally the flowers. The technique of water taken up and lost by way of the plant is a necessary component and is maintained at a particular rate relying on the habitat of the plant.

Complete answer:
Water is an essential thing that is required via the flowers for carrying out a number of methods mainly the photosynthetic process. The roots take up water from the soil and it reaches the leaves thru special conducting tissues. In this process, some amount of water is used via the plant but most of it is misplaced to the surroundings via the manner of transpiration.

Transpiration can be defined as the elimination of excess water from the components of the shoot machine that is current above the floor levels. The technique of transpiration takes area when the water is misplaced in the shape of water vapors, from the leaves and shoots. The stomata allows the diffusion of gases such as carbon dioxide and oxygen and the opening of the stomata causes the water current near the surface of leaves to be lost to the environment.

The quantity of water lost via the plants in the shape of water vapors over a time length is acknowledged as the price of transpiration of plants. The fee of transpiration relies upon the opening and closing of the stomatal pores.

Now let us find solution from given options:
(A) Atmometer : An atmometer or evaporimeter is a scientific instrument used for measuring the price of water evaporation from a moist floor to the atmosphere. Atmometers are mostly used through farmers and growers to measure evapotranspiration (ET) prices of plants at any subject location.
(B) Psychrometer : A psychrometer is defined as an instrument used to measure the relative humidity in the atmosphere through the use of two thermometers: a dry bulb thermometer, is used to measure the temperature by means of being exposed to the air. a moist bulb thermometer, measures temperature by using the bulb dipped in a liquid.
(C) Potometer : Various environmental factors can be also accountable for the rate of transpiration. The fee of transpiration is measured by way of the use of a potometer. A potometer is used to measure the charge of transpiration which is proportional to the water up taken via the plant.
(D) Porometer : The Porometer measures stomatal aperture in phrases of leaf conductance to water vapour. This is a most important determinant of water loss from plant leaves and of Carbon dioxide uptake in photosynthesis.

Thus the correct answer is option ‘C’.

Note: Transpiration is an essential phenomenon of flowers and in this process due to the ordinary opening and closing of the stomata water from the surfaces of flora as water vapors. The charge of transpiration is measured through calculating the distance protected by an air bubble in a particular time interval a capillary tube. The photometer is an apparatus used to determine the rate of transpiration in plants.