Journal Article

Involvement of Calyculin A- and Okadaic Acid-sensitive Protein Phosphatase in the Blue Light Response of Stomatal Guard Cells

Toshinori Kinoshita and Ken-ichiro Shimazaki

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 38, issue 11, pages 1281-1285
Published in print January 1997 | ISSN: 0032-0781
Published online January 1997 | e-ISSN: 1471-9053 | DOI: http://dx.doi.org/10.1093/oxfordjournals.pcp.a029117
Involvement of Calyculin A- and Okadaic Acid-sensitive Protein Phosphatase in the Blue Light Response of Stomatal Guard Cells

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Calyculin A (CA) and okadaic acid (OA), inhibitors of protein phosphatases, inhibited blue light (BL)-dependent H+pumping in Vicia guard cell protoplasts at half-inhibitory concentrations of 4.5 nM and 400 nM, respectively. Light-induced stomatal opening in Viciaepidermis was completely suppressed by CA at 100 nM and by OA at 1 μM. These results suggest that CA- and OA-sensitive protein phosphatase is involved in the BL response of stomatal guard cells.

Keywords: Blue light; Guard cell protoplasts; H+-ATPase; Protein phosphatase; Stomata; Vicia faba L

Journal Article.  0 words. 

Subjects: Biochemistry ; Molecular and Cell Biology ; Plant Sciences and Forestry

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