Definition

Noun: 1. A specialized pore, especially on a leaf, that releases water: A "water pore" is a small opening, typically found on the surface or edge of a leaf in vascular plants, from which water is secreted. This process is part of guttation, where excess water and dissolved minerals are exuded from the plant.

Usage and Examples

• Noun:
  • The presence of water pores at the leaf margins is a key anatomical feature for identifying some plant species.
  • In the early morning, you can often see droplets of water at the water pores, a result of guttation.

Advanced Usage

• In Botanical Context: The term is used almost exclusively in botany and plant physiology to describe the specific structures, often synonymous with or a component of a hydathode, which is the complex tissue containing the water pore.
  • The study focused on the mechanism of ion secretion through the water pores of the hydathode.

Variants and Related Words

• Hydathode (n): A more precise botanical term for the specialized structure on a leaf that contains one or more water pores and is involved in guttation.
• Stoma (n): A pore used for gas exchange (taking in carbon dioxide, releasing oxygen and water vapor); distinct from a water pore which exudes liquid water.
• Guttation (n): The process of exuding water droplets from water pores or hydathodes.

Synonyms

• Hydathode pore
• Water stoma (Note: This can be a less precise synonym, as "stoma" typically refers to pores for gas exchange).

Notes on Meaning

• The term "water pore" is highly specific. It does not refer to a pore in the skin, a hole in a container, or any metaphorical use. Its meaning is confined to plant anatomy.
• It is often used interchangeably with "hydathode," though technically a hydathode is the entire secretory structure, and the water pore is the actual opening.

Noun

1. a pore that exudes water on the surface or margin of a leaf of higher plants