Question

When secondary growth occurs, girth of stem increases. Cambial ring increases in diameter due to.

• A. Periclinal division and radial elongation of cambial cells
• B. Anticlinal division and radical elongation of cambial cells
• C. Both periclinal and anticlinal divisions and radial elongation of cambial cells
• D. Radial elongation of cambial cells alone

Answer 1

Answer: (B)

Anticlinal division and radical elongation of cambial cells

During secondary growth, intra and interfascicular cambia join together and form into a ring of cambium called vascular cambium. The cells in the vascular cambium undergo periclinal divisions and undergo elongation radially, produces secondary vascular tissues and ray parenchyma. It leads to an increase in girth of the stem.

So, the correct answer is ‘Periclinal divisions and radial elongation of cambial cells’.