Onion Epidermis Plasmolysis
by Gerd Guenther/science Photo Library
Title
Onion Epidermis Plasmolysis
Artist
Gerd Guenther/science Photo Library
Medium
Photograph - Photograph
Description
Differential interference contrast (DIC) light micrograph of the outer epidermis of an onion scale under plasmolysis. For better visualisation, a red onion variety was used here, which contains the red plant dye anthocyanin in the vacuoles. When a saturated sugar solution is added, there is a concentration balance in the intact cells, water migrates through the cell membranes to the outside, and the vacuoles shrink. This process is reversible. Magnification: x120 at a print width of 10 centimetres.
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April 28th, 2022
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