Is a potometer an apparatus?
Is a potometer an apparatus?
A potometer is a piece of apparatus designed to measure water uptake in a leafy shoot. There are 2 types of potometer – the bubble potometer and the weight potometer.
What is potometer is used for?
A potometer’ (from Greek ποτό = drunken, and μέτρο = measure), sometimes known as transpirometer, is a device used for measuring the rate of water uptake of a leafy shoot which is almost equal to the water lost through transpiration. The causes of water uptake are photosynthesis and transpiration.
Which apparatus is used to measure transpiration?
potometer
The instrument used for measuring the rate of transpiration is called a potometer.
What is a potometer made of?
A very simple potometer can be made by inserting a leaf-bearing plant stem snugly into a piece of plastic tubing and connecting the tubing to a pipette, or graduated length of glass tubing, full of water.
What is the difference between a potometer and photometer?
A potometer measures water loss from leaves. A bubble potometer measures the rate of water loss from a plant by transpiration. A weight photometer measures the amount of water lost by a plant through transpiration. The washing line method is used to prove that most water loss occurs from the lower surface of the leaf.
Why are potometer used to measure transpiration?
The faster the bubble moves, the greater the rate of water uptake – and so the greater the assumed rate of transpiration. The potometer is set up underwater to avoid unwanted air bubbles in the xylem of the plant which may disrupt the transpiration stream.
Why is a capillary tube used in a potometer?
A simple potometer is a piece of capillary tubing to which a plant has been connected. The water uptake is measured by recording the time taken for a bubble in the tube to move a set distance….Example results.
| Time in minutes | Distance moved by bubble in mm |
|---|---|
| 30 | 95 |
What is Ganong potometer?
A potometer is a device, which is used to measure water uptake by shoot during transpiration. It is also known as transpirometer. The Ganong’s potometer is used to measure the transpiration rate in a laboratory. The Ganong’s potometer comprises a glass tube, which is bent twice, a glass cylinder having a wide mouth.
What is a simple potometer?
A simple potometer is a piece of capillary tubing to which a plant has been connected. The water uptake is measured by recording the time taken for a bubble in the tube to move a set distance. Aim of the experiment. To find the rate of water uptake of a plant.
How do you measure the rate of transpiration?
The rate of transpiration can be calculated by measuring the distance travelled by an air bubble in a capillary tube over a given time. The faster the bubble moves, the greater the rate of water uptake – and so the greater the assumed rate of transpiration.
