geotropism

/dʤi'ɔtrəpizm/

Thân thiện

A young plant's roots grow downward, showing positive geotropism.

Definition

1. Noun:
   • An orienting response to gravity: In biology, particularly botany, geotropism is the directional growth or movement of a plant or fungus in response to gravity.

Usage

• Noun:
  • Geotropism is a fundamental concept in plant physiology.
  • The downward growth of a plant's root is a classic example of positive geotropism.

Examples

• Noun:
  • Plant roots exhibit positive geotropism by growing downward toward the center of the Earth.
  • The upward growth of a stem against gravity is an instance of negative geotropism.

Advanced Usage

• "Positive geotropism": Growth or movement directed the source of gravity (e.g., roots growing downward).
• "Negative geotropism": Growth or movement directed from the source of gravity (e.g., stems growing upward).

Variants and Related Words

• Geotropic (adj): Relating to or exhibiting geotropism.
  • The geotropic response of the seedling was observed in the experiment.

Synonyms

• Gravitropism: A more modern, synonymous term for geotropism, emphasizing the stimulus of gravity.

Học thuật

Noun

1. an orienting response to gravity