Question

Identify the process taking place in this experiment.

• A. Ringing experiment for translocation of sap
• B. Demonstration of root pressure
• C. Eosin test to demonstrate ascent of sap
• D. Demonstration of transpiration

Answer 1

The correct option is A Ringing experiment for translocation of sap

• The demonstration in the experiment is a ringing experiment for the translocation of sap.
• Translocation is the process of transporting liquids from leaves to other tissues throughout the plant. Movement of water from the soil to the leaves is done in xylem vessels.
• Organic materials mainly produced in the leaves are moved around the plant in the living cells of the phloem.
• Unlike xylem, which is composed of dead cells, the phloem is composed of living cells that transport sap. The water-based solution rich in sugars made by the process of photosynthesis is called sap.
• In the ringing experiment, a ring of bark is scraped away that also removes the phloem.
• After a while sugar is transported down the stem but it is stopped by the ring. This means, a bulge above the ring forms of sugar. This suggests that sugar moves down the stem in the phloem.
  So, the correct answer is option A.