Open stoma, light micrograph

Open stoma, light micrograph

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Caption: Open stoma, light micrograph. This structure (oval) is a pore that regulates the exchange of gases and water vapour into and out of a plant. Stomatal closure is a natural response to darkness or drought as a means of conserving water. Each pore is controlled by two guard cells. The pore opens when the guard cells become turgid with water, and close when the guard cells lose water. This stoma is from a tulip plant. Magnification: x445 when printed at 10 centimetres across.


Keywords: air flow, anatomical, biological, biology, botanical, botany, breathing hole, carbon dioxide, cell, cells, contrast, dic, differential interference, flora, gas exchange, guard cell, light micrograph, light microscope, lm, nature, open, oxygen, plant, plant anatomy, pore, respiration, stoma, stomata, tissue, transpiration, tulip, tulipa, water, water exchange
