Question

What is a coleoptile in plants?

Answer 1

Coleoptiles in plants:

1. Coleoptiles is the first leaf of a monocotyledon which forms a protective sheath about the plumule.
2. These are cylindrical structures that ensheath the shoot apex and first leaf in grass seedlings.
3. It assists in the emergence of the shoot apex (first leaf) by safeguarding it while it passes through the soil.
4. Once it emerges, the first leaf breaks through the coleoptile tip.
5. Auxin is the plant growth hormone present at the tip of the coleoptile.
6. Auxin was first isolated from the coleoptile of oats seedlings.