Onion leaf epidermis with stomata pores
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Onion leaf epidermis with stomata pores
Light micrograph of epidermal cells on the leaf of the onion, Allium cepa, showing four stomata, or pores on the surface. The pores allow the passage of gases through the otherwise impermeable epidermis to the interior of the leaf. On either side of the pores are guard cells. These regulate the size of the pores, and thus the rate of gas transfer, by expanding or contracting due to internal hydrostatic pressure. Magnification x400 at 35mm size
Science Photo Library features Science and Medical images including photos and illustrations
Media ID 9194261
© POWER AND SYRED/SCIENCE PHOTO LIBRARY
Allium Cepa Epidermis Onion Plants Pore Stoma Cells
EDITORS COMMENTS
This print captures the intricate beauty of an onion leaf epidermis, showcasing its delicate network of cells and four distinct stomata pores. The onion leaf, scientifically known as Allium cepa, possesses these pores on its surface to allow the passage of essential gases through its otherwise impermeable epidermis. The stomata pores play a crucial role in facilitating gas exchange within the leaf. Positioned on either side of the pores are guard cells that act as gatekeepers, regulating the size of the openings to control the rate at which gases are transferred. These remarkable guard cells expand or contract due to internal hydrostatic pressure, thus maintaining a delicate balance between efficient gas exchange and preventing excessive water loss. At a magnification of x400 and captured at 35mm size, this light micrograph reveals astonishing details that might go unnoticed by our naked eyes alone. It offers us a glimpse into nature's ingenious design and reminds us of the complexity hidden within even seemingly simple structures like an onion leaf. With its focus on botany and plant science, this image from Science Photo Library serves as a testament to mankind's continuous exploration and understanding of our natural world. It invites viewers to appreciate both the aesthetic appeal and scientific significance found in every corner of nature – from humble onions to grand ecosystems – reminding us once again why we should cherish and protect our precious planet Earth.
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