leaf node

Thân thiện

A gardener carefully examines a leaf node on a young plant stem.

Definition

1. Noun (Botany):
   • A leaf node is the specific point on a plant stem where one or more leaves are attached. It is typically a slightly swollen or raised area from which a leaf bud, leaf stalk (petiole), or leaves directly emerge. This structure is a fundamental part of plant morphology, marking the location of leaf growth and often containing meristematic tissue for potential new branch development.

Usage

• The term leaf node is used primarily in botanical, horticultural, and gardening contexts to describe plant anatomy and to give precise instructions for activities like pruning or propagation.
• It is a countable noun (e.g., "a leaf node," "several leaf nodes").

Examples

• Noun:
  • When taking a cutting for propagation, make the cut just below a leaf node.
  • New branches on this plant will only sprout from the leaf nodes along the stem.
  • The botanist examined the spacing between each leaf node to help identify the species.

Advanced Usage

• "Internode": The section of stem two leaf nodes is called an internode. Growth in length often occurs in the internodes.
• In plant propagation (e.g., stem cuttings), the leaf node is a critical site because it contains cells that can develop into new roots. Instructions often specify placing a node below the soil or water surface.

Variants and Related Words

• Node (Noun): A more general term for a point on a stem where leaves or branches arise. A leaf node is a specific type of node.
• Axillary Bud (Noun): The bud located in the axil (upper angle) between a leaf and the stem, at a leaf node. This bud can develop into a new branch or flower.
• Internode (Noun): The stem segment between two successive nodes.

Synonyms

• Botanical Node: A more formal synonym emphasizing the botanical context.
• Leaf Axil Point: A descriptive phrase referring to the location.

Related Phrases

• "Above a leaf node": A directional phrase used in pruning instructions, meaning to cut the stem at a point farther from the roots than the node.
  • Prune the stem above a leaf node to encourage bushier growth.
• "Below a leaf node": A directional phrase used in propagation instructions, meaning to cut the stem at a point closer to the roots than the node.
  • For the best chance of rooting, cut the stem below a leaf node.

Học thuật

Noun

1. (botany) the small swelling that is the part of a plant stem from which one or more leaves emerge

Từ đồng nghĩa

• node