Light and Stomatal Function: Blue Light Stimulates Swelling of Guard Cell Protoplasts
- 20 May 1977
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 196 (4292) , 887-889
- https://doi.org/10.1126/science.196.4292.887
Abstract
Onion guard cell protoplasts swell when illuminated with blue light. The response is a 35 to 60 percent increase in volume and is dependent on potassium ion. Epidermal cell protoplasts do not swell under the same conditions. It is postulated that a membrane-bound blue photoreceptor mediates a direct response of guard cells to light.Keywords
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