Question

Ringing experiment can not be done on a sugar cane plant because

• A. Its xylem is scantly.
• B. Its pholem is with out pholem parenchyma.
• C. Its vascular bundles are scattered.
• D. Its pholem is present inside the xylem.

Answer 1

The correct option is C Its vascular bundles are scattered.

Ringing experiments prove that sugars move through phloem. If the phloem tissue is removed in a ring or girdle, the sugars cannot be transported to roots from aerial parts and plant dies.

In monocots, like sugarcane have scattered vascular bundle. Thus, meaningful ringing experiments cannot be performed on them as it is impossible to remove phloem strands individually from each vascular bundle. In monocot stem some of the vascular bundles are present deeply embedded inside the stem, whereas some are present on the surface.