Question

Abscission layer is made up of

• A. Cork cells
• B. Sclerenchymatous cells
• C. Collenchymatous cells
• D. Parenchymatous cells

Answer 1

Answer: (D)

Parenchymatous cells

Abscission layer is produced at the base of leaf/fruit, during maturity, between separation layer of organ and protection layer of the stem. It produces a lower concentration of auxin in separation layer on organ side and higher in protection layer on stem side thereby causing abscission. As we know that parenchymatous cells are thin walled polyhedral, isodiametric living cells with sufficient cytoplasm and one or more nuclei. Abscission layer is made up of cutinized parenchymatous cells, which are easily disintegrated causing the abscission.

So, the correct answer is option D.