Red and far-red light effects on a short-term behavioral response of a dinoflagellate.


Journal Article

Cessation of movement (stop response) is used as a criterion for light reception by the dinoflagellate Gyrodinium dorsum Kofoid. Brief irradiation (2 seconds at 470 nanometers) elicits a stop response in cells any time during the 6-minute interval after removal from growth lights. This stop response is inactivated by exposure for 4 minutes to 470-nanometer light prior to stimulation. Red light (620 nanometers) reactivates this stop response, and far-red light (700 nanometers) reverses this reactivation. This red-far-red photo reversibility is taken as evidence for phytochrome involvement.

Full Text

Duke Authors

Cited Authors

  • Forward, R; Davenport, D

Published Date

  • September 1, 1968

Published In

Volume / Issue

  • 161 / 3845

Start / End Page

  • 1028 - 1029

PubMed ID

  • 5671481

Pubmed Central ID

  • 5671481

Electronic International Standard Serial Number (EISSN)

  • 1095-9203

International Standard Serial Number (ISSN)

  • 0036-8075

Digital Object Identifier (DOI)

  • 10.1126/science.161.3845.1028


  • eng