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Light and stomatal function: blue light stimulates swelling of guard cell protoplasts

Light and stomatal function: blue light stimulates swelling of guard cell protoplasts

Science 196(4292): 887-889

ISSN/ISBN: 0036-8075

PMID: 17821809

DOI: 10.1126/science.196.4292.887

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.

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Accession: 000421345

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