Plumule

Definition

The plumule is the part of a seed embryo that develops into the shoot bearing the first true leaves. It emerges above the soil during germination and is crucial for photosynthesis initiation.

5 Must Know Facts For Your Next Test

1. The plumule is located above the cotyledons in a seed embryo.
2. It develops into the young shoot, including stems, leaves, and buds.
3. During seed germination, the plumule grows upward, breaking through the soil surface.
4. The health of the plumule is vital for successful plant growth as it begins photosynthesis.
5. In monocots, the plumule is protected by a sheath called the coleoptile.

Review Questions

• What role does the plumule play in seed germination?
• Where is the plumule located within a seed embryo?
• How does the plumule contribute to photosynthesis?

Related terms

Radicle: The part of a seed embryo that develops into the primary root.

Cotyledon: First leaf or one of two leaf-like structures present in seeds that provide nutrients to seedlings.

Coleoptile: A protective sheath covering emerging shoots in monocotyledonous plants.