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  1. Dictionary
    Guard cell
    /ɡärd sel/

    noun

    • 1. each of a pair of curved cells that surround a stoma, becoming larger or smaller according to the pressure within the cells.

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  3. asknature.org › strategy › guard-cells-regulate-gasHow Guard Cells Function — Biological Strategy — AskNature

    May 2, 2020 · Guard cells are a pair of two cells that surround each stoma opening. To open, the cells are triggered by one of many possible environmental or chemical signals. These can include strong sunlight or higher than average levels of carbon dioxide inside the cell.

  4. www.cell.com › current-biology › fulltextGuard cells: Current Biology - Cell Press

    Guard cells. What are guard cells? A pair of guard cells surrounds each stoma on the leaf surface. Stomata are important because they regulate the uptake of CO 2 from the atmosphere for photosynthesis and also the loss of water vapour from the plant during transpiration. The aperture of the stomatal pore is controlled by the two guard cells.

  5. www.ck12.org › flexi › biologyFlexi answers - What are guard cells? What are their ...

    Flexi Says: Guard cells are specialized cells in the epidermis of leaves, stems, and other organs that are used to control gas exchange. They are produced in pairs with a gap between them that forms a stomatal pore. The primary function of guard cells is to control the opening and closing of stomata, thus regulating the exchange of gases ...

  6. www.sciencedirect.com › guard-cellGuard Cell - an overview | ScienceDirect Topics

    Guard cells are another type of plant single-cell models to study early signal transduction and stress tolerance mechanisms in plants. Guard cells are surrounded by stomatal pores and are located in leaf epidermis. Guard cells control influx and efflux of CO2 and water from leaves, respectively.

  7. www.ncbi.nlm.nih.gov › pmc › articlesThe Membrane Transport System of the Guard Cell and Its ...

    Apr 13, 2017 · Guard cells integrate ion transport with secretory traffic that adds new membrane surface as the cells expand; conversely, rates of endocytosis coordinate with solute export as the cell volume decreases.

    • Mareike Jezek, Michael R. Blatt
    • 10.1104/pp.16.01949
    • 2017
    • Plant Physiol. 2017 Jun; 174(2): 487-519.

  8. bio.libretexts.org › Bookshelves › Botany10.2.2: Specialized Cells - Biology LibreTexts

    Guard cells are the pairs of cells, shaped a bit like parentheses or two sides of a donut, that flank the stoma. The guard cells regulate when the stoma is open or closed, which in turn regulates gas exchange with the environment and the rate of transpiration.

  9. www.bbc.co.uk › bitesize › guidesTransport and structure of specialised plant cells - Plant ...

    Most plants regulate the size of stomata with guard cells. Each stoma is surrounded by a pair of sausage-shaped guard cells. In bright light the guard cells take in water by

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