Stomatal Opening Is Induced in Epidermal Peels of Commelina communis L. by GTP Analogs or Pertussis Toxin

H. J. Lee; E. B. Tucker; R. C. Crain; Y. Lee

doi:10.1104/pp.102.1.95

Stomatal Opening Is Induced in Epidermal Peels of Commelina communis L. by GTP Analogs or Pertussis Toxin

Plant Physiol. 1993 May;102(1):95-100. doi: 10.1104/pp.102.1.95.

Authors

H. J. Lee¹, E. B. Tucker, R. C. Crain, Y. Lee

Affiliation

¹ Department of Life Science, Pohang Institute of Science and Technology, Pohang, Korea (H.J.L., Y.L.).

Abstract

Pretreatment with pertussis toxin or microinjection of guanosine- 5[prime]-(3-thiotriphosphate) (GTP-[gamma]-S) into guard cells in peeled epidermis of Commelina communis L. promoted stomatal opening under subsaturating white light. Guanosine-5[prime]-(2-thiodiphosphate) (GDP-[beta]-S) and adenosine-5[prime]-(3-thiotriphosphate) (ATP-[gamma]-S) did not change stomatal aperture under identical conditions. These results indicate that G proteins may be involved in the regulation of stomatal opening.