Shifting the Phase of the Circadian Rhythm in Bioluminescence in Gonyaulax with Vanillic Acid | Zendy

Richard S. Kiessig | Zendy; Jeffrey M. Herz | Zendy; Beatrice M. Sweeney | Zendy

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Shifting the Phase of the Circadian Rhythm in Bioluminescence in Gonyaulax with Vanillic Acid

Author(s) -

Richard S. Kiessig,

Jeffrey M. Herz,

Beatrice M. Sweeney

Publication year - 1979

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.63.2.324

Subject(s) - circadian rhythm , vanillic acid , bioluminescence , depolarization , chemistry , benzoic acid , biology , biophysics , biochemistry , chromatography , endocrinology

Exposure for 4 hours to vanillic acid (4-hydroxy 3-methoxy benzoic acid) caused large delay phase shifts (5 to 6 hours) in the circadian rhythm of bioluminescence in Gonyaulax polyedra, when assayed at either 10 to 14 circadian time or 22 to 02 circadian time in constant light and temperature, provided that the pH of the medium was 7.1 or lower. Corresponding changes in the pH with acetic acid did not shift phase. Vanillic acid caused detectable depolarization of the membranes of Gonyaulax, as demonstrated with the cyanine dye fluorescence technique.

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