root hair

Học thuật
Thân thiện
root hair

A tiny root hair absorbs water from the moist soil.

Definition
  1. Noun:
    • A microscopic tubular extension of a root's epidermal cell: A "root hair" is a very thin, hair-like projection that grows from an epidermal cell located near the tip of a plant root. Its primary function is to significantly increase the surface area of the root for the absorption of water and mineral nutrients from the soil.
Usage
  • Noun:
    • The root hair is essential for a plant's uptake of water and dissolved minerals.
    • The delicate structure of a root hair allows it to penetrate between soil particles.
    • Damage to the root hairs can impair a plant's ability to absorb nutrients effectively.
Examples
  • Noun:
    • The formation of a root hair greatly increases the root's absorptive surface.
    • Scientists observed the root hairs under a microscope to study nutrient absorption.
    • Water enters the plant primarily through the root hairs.
Advanced Usage

  • "Root hair development": Refers to the biological process by which root hairs form and elongate from specific epidermal cells.

    • The study focused on the genes controlling root hair development.

  • "Root hair zone": The region of a young root just behind the growing tip where root hairs are most abundant and active.

    • Nutrient absorption is most efficient in the root hair zone.
Variants and Related Words
  • Root epidermis (n): The outermost layer of cells covering the root, from which root hairs originate.
  • Trichoblast (n): The specific epidermal cell that gives rise to a root hair.
  • Rhizosphere (n): The narrow region of soil directly influenced by root secretions and associated microorganisms, which is intimately contacted by root hairs.
Synonyms
  • Absorptive hair: A descriptive synonym emphasizing the primary function.
  • Root trichome: A more technical botanical term, though "trichome" can refer to hair-like structures on other plant parts as well.
Related Phrases

  • Root hair elongation: The process by which a root hair grows in length.

    • Soil moisture levels can affect the rate of root hair elongation.

  • Root hair deformation: A change in the normal shape or structure of root hairs, often in response to pathogens or symbionts like nitrogen-fixing bacteria.

    • The bacteria caused root hair deformation as part of the infection process.
root hair

A tiny root hair absorbs water from the moist soil.

Noun
  1. thin hairlike outgrowth of an epidermal cell just behind the tip; absorbs nutrients from the soil