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perforation plate
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Diagram comparing xylem and phloem cells, showing labeled illustrations of a vessel member, tracheids, and fiber for xylem on the left, and a sieve element, companion cell, sieve plate, sieve areas, and fiber for phloem on the right.
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perforation plate

botany
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Diagram comparing xylem and phloem cells, showing labeled illustrations of a vessel member, tracheids, and fiber for xylem on the left, and a sieve element, companion cell, sieve plate, sieve areas, and fiber for phloem on the right.
vascular cells Figure 6: Cells of the xylem and phloem.

In botany, a perforation plate refers to the end walls of vessel members in angiosperms. These plates have perforations, or holes, that allow for efficient water conduction through the plant's xylem.12

Tracheids, the more primitive water-conducting cells found in all vascular plants, lack these perforations and instead have pits in their cell walls. The evolution of vessel members with perforation plates in angiosperms enabled them to occupy a wider range of habitats due to their more efficient water transport system compared to vessel-less plants.12

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3 Britannica Sources
  1. tracheid
  2. magnoliid clade - Vegetative structures
  3. perforated

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