Phototactic responses of Elachista antarctica (Phaeophyceae) spores of different ages across a broad irradiance range using new motion analysis software

Abstract Phototactic movements of Elachista antarctica spores were quantified across a wide range of irradiances from 10 to 800 μmol photons m -2 s -1 using the recently updated version of CellTrak 1.5 motion analysis software. Spores 0–12 h old exhibited phototactic attraction at 80 and 200 μmol ph...

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Bibliographic Details
Published in:Botanica Marina
Main Authors: Bucolo, Philip, Amsler, Charles D., McClintock, James B., Baker, Bill J.
Format: Article in Journal/Newspaper
Language:English
Published: Walter de Gruyter GmbH 2012
Subjects:
Plant Science
Aquatic Science
Ecology, Evolution, Behavior and Systematics
Antarc*
Antarctica
Online Access:http://dx.doi.org/10.1515/bot-2012-0140
https://www.degruyter.com/document/doi/10.1515/bot-2012-0140/xml
https://www.degruyter.com/document/doi/10.1515/bot-2012-0140/pdf
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Summary:Abstract Phototactic movements of Elachista antarctica spores were quantified across a wide range of irradiances from 10 to 800 μmol photons m -2 s -1 using the recently updated version of CellTrak 1.5 motion analysis software. Spores 0–12 h old exhibited phototactic attraction at 80 and 200 μmol photons m -2 s -1 , which contributed to vertical movements up out of the boundary layer to be further dispersed hydrodynamically, but were repelled at 800 μmol photons m -2 s -1 , causing spores to retreat from detrimental irradiances. No significant effects were observed among spores released 24–36 h before measuring phototaxis at 200 and 800 μmol photons m -2 s -1 .

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