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A simple incubation tank for photosynthesis measurements with six light intensities

Published online by Cambridge University Press:  21 August 2009

Viktor R. Tóth  and
Sándor Herodek
Viktor R. Tóth*
Affiliation:
Hungarian Academy of Sciences, Balaton Limnological Research Institute, Klebelsberg K.u. 3, Tihany, 8237, Hungary
Sándor Herodek
Affiliation:
Hungarian Academy of Sciences, Balaton Limnological Research Institute, Klebelsberg K.u. 3, Tihany, 8237, Hungary
*
[email protected]
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Abstract

The aim of the study was to design and put together a compact, easy-to-assemble and cost-efficient incubation system for aquatic plant photosynthesis measurements. Incubation tank consisting of glass sidewalls and mirror inner walls was constructed. The tank was split into six incubation cells and two water collecting cells. Each incubation cell was built of mirror with reflective side turned into the incubation cells to prevent the self shading of plants and minimized the variance of light intensity within the cell. The wall of each incubation cell facing the source of light was made of 3 mm glass and was covered by light absorbing film. To produce different light intensities single light source (fluorescent tubes) and light absorbing film (3M Scotchtint™ Sun Control RE50NEARL) were chosen. The sidewall of each incubation cell was covered with metal-coated neutral sun control film to produce six distinct light intensities. The different transparency of the sidewalls was achieved by lamination of the chosen film in increasing numbers of layers. The effect of the lamination on optical properties of the film was also studied. The variation of photon flux density within a cell was 3.9%. Continuous use of the system and occasional repetitive measurements of film's transparency showed that it maintained its neutral optical properties over a long period of time.

Keywords

Incubation tankphotosynthesislight intensitiesaquatic macrophytesecophysiology
Type
Research Article
Information
Annales de Limnologie - International Journal of Limnology , Volume 45 , Issue 3 , 2009 , pp. 195 - 202
Copyright
© EDP Sciences, 2009

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