Question

Organization of stem apex into corpus and tunica is determined mainly by

• A. Rate of shoot tip-growth
• B. Rate of cell growth
• C. Regions of meristematic activity
• D. Planes of cell division

Answer 1

Answer:

D. Planes of cell division

• The tunica corpus concept was given by Schmidt (1924) which was based on plane of divisions of cells.

• According to this concept there are two portions in shoot apex tunica and corpus.

• The tunica shows only anticlinal divisions and thus it is responsible for surface growth.

• The corpus shows divisions in all plans and thus responsible for volume growth.