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Reduction in growth rate in Phaeodactylum tricornutum (Bacillariophyceae) and Dunaliella tertiolecta (Chlorophyceae) induced by UV-B radiation

Paper ID Volume ID Publish Year Pages File Format Full-Text
31031 44532 2007 7 PDF Available
Title
Reduction in growth rate in Phaeodactylum tricornutum (Bacillariophyceae) and Dunaliella tertiolecta (Chlorophyceae) induced by UV-B radiation
Abstract

The effect of UV-B radiation (UVBR, 280–315 nm) on growth rate during 72 h of incubation, was measured for two marine microalgae – Dunaliella tertiolecta (Chlorophyceae) and Phaeodactylum tricornutum (Bacillariophyceae). The resulting inhibition of growth rate was analysed by calculating biological weighting functions (BWFs). The growth rate of D. tertiolecta was slightly more inhibited by UVBR (over the whole range of the spectrum) than was the growth rate of P. tricornutum, but the wavelength dependencies were the same.Our results were compared with results from photosynthesis experiments of Andreasson and Wängberg [1], where two methods, pulse amplitude modulation (PAM) fluorescence and carbon fixation, were measured for these same algae. The BWF for the growth rate, here, showed more wavelength dependency than the BWF for the previous two photosynthesis measurements – except for the carbon fixation BWF in P. tricornutum, which was closer to the BWF for growth rate. The wavelength dependency of the growth rate inhibition showed less variation between the species than the inhibition of the photosynthesis.

Keywords
Biological weighting function; Cell growth rate; Dunaliella tertiolecta; Phaeodactylum tricornutum; UV-B radiation
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Reduction in growth rate in Phaeodactylum tricornutum (Bacillariophyceae) and Dunaliella tertiolecta (Chlorophyceae) induced by UV-B radiation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology B: Biology - Volume 86, Issue 3, 1 March 2007, Pages 227–233
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us