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Stress-related levels of abscisic acid in guard cell protoplasts ofVicia fabaL.

✍ Scribed by Elmar W. Weiler; H. Schnabl; C. Hornberg

Publisher: Springer-Verlag
Year: 1982
Tongue: English
Weight: 472 KB
Volume: 154
Category: Article
ISSN: 0032-0935
DOI: 10.1007/bf00385492

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✦ Synopsis

Levels of abscisis acid (ABA) were determined in isolated guard cell (GCP) and mesophyll cell (MCP) protoplasts of Vicia faba L. in relation to water stress. Incubation of GCP and MCP in 0.4 M or 0.8 M mannitol resulted in an average increase in the level of free abscisic acid (ABA) in the cells of 34% (GCP) and 38% (MCP) within 15-60 rain. It is concluded that guard cell protoplasts form ABA in response to osmotic stress.

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