Question

Root pressure helps in ascent of sap by

• A. Pumping food in phloem
• B. Pumping sap into xylem in roots
• C. Pumping sap in stem for sending it to roots
• D. All of the above

Answer 1

The correct option is B Pumping sap into xylem in roots

Root pressure is the transverse osmotic pressure in the cells of a root system. It helps in the ascent of sap to the leaves by pumping sap into xylem present in the roots. According to Godlewski, ascent of sap occurs due to the pumping action of the cells of xylem parenchyma as a result of root pressure.

Thus, the correct answer is option B.