Question

Root pressure can be measured by

• A. Attaching a barometer to the cut end of the stem
• B. Attaching a manometer to the cut end of the stem
• C. Attaching a thermometer to the cut end of the stem
• D. Attaching a potometer to the cut end of the stem

Answer 1

The correct option is B Attaching a manometer to the cut end of the stem

The root pressure can be measured by attaching a suitable mercury manometer to the cut end of the stem. Root pressure provides a force which causes pushing of water in the stem. A continuous flow of water is maintained in the plants because the leaves transpire water through stomata and to replace the lost water the water drawn by the roots moves up.