rễ phụ

Cây đa có nhiều rễ phụ mọc từ cành xuống đất.

Definition

1. Noun:
   • Aerial root / Adventitious root: A root that grows from the stem or branch of a plant, above the ground, rather than from the primary root system in the soil. It often serves for support, climbing, or additional nutrient absorption.

Usage Examples

• Noun:
  • Cây đa có nhiều rễ phụ rủ xuống từ cành cây. (The banyan tree has many aerial roots hanging down from its branches.)
  • Rễ phụ giúp cây trầu bám vào thân cây khác. (Adventitious roots help the betel plant cling to another tree's trunk.)
  • Những rễ phụ này hấp thụ độ ẩm từ không khí. (These aerial roots absorb moisture from the air.)

Advanced Usage

• In botany, "rễ phụ" is a specific type of adventitious root, which is any root that grows from an unusual part of the plant (like a stem or leaf).
• "Rễ phụ khí sinh": Refers specifically to epiphytic aerial roots, common in orchids, which absorb water and nutrients directly from the air.

Variants and Related Words

• Rễ chính (n): Primary root or taproot; the main root growing downward from the seed.
• Rễ con (n): Lateral root or fibrous root; smaller roots branching from the main root.
• Rễ cọc (n): Taproot system.

Synonyms

• Aerial root: A root growing above ground.
• Adventitious root: A root arising from a non-root tissue (stem, leaf).
• Prop root: A type of aerial root that provides mechanical support (e.g., in corn or mangroves).

Related Botanical Terms

• Cây biểu sinh (epiphyte): A plant that grows on another plant and often has prominent aerial roots (e.g., many orchids).
• Rễ giả (pseudoroot): A root-like structure that is not a true root, sometimes confused with "rễ phụ" in casual speech.