Phyllotaxy

Definition

Phyllotaxy is the arrangement of leaves on a plant stem. It affects light capture, photosynthesis efficiency, and overall plant health.

5 Must Know Facts For Your Next Test

1. There are three main types of phyllotaxy: alternate, opposite, and whorled.
2. Alternate phyllotaxy means one leaf per node, arranged in a spiral or helical pattern.
3. Opposite phyllotaxy has two leaves per node, positioned directly across from each other.
4. Whorled phyllotaxy features three or more leaves per node.
5. Phyllotaxy impacts how well plants can maximize sunlight exposure for photosynthesis.

Review Questions

• What are the three primary types of phyllotaxy?
• How does alternate phyllotaxy differ from opposite phyllotaxy?
• Why is phyllotaxy important for plant health?

Related terms

Node: A point on the stem where leaves or branches originate.

Photosynthesis: The process by which green plants use sunlight to synthesize nutrients from carbon dioxide and water.

Leaf Blade: The broad, flat part of a leaf where most photosynthesis occurs.