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The effect of UV-B radiation and humic substances on growth and motility of the flagellate, Euglena gracilis
Department of Plant Physiology, Lund University.ORCID iD: 0000-0003-2835-097X
1993 (English)In: Journal of Plankton Research, ISSN 0142-7873, E-ISSN 1464-3774, Vol. 15, p. 715-722Article in journal (Refereed) Published
Abstract [en]

The effects of ultraviolet-B radiation (UV-B, 250–315 nm) were determined on Euglena gracilis with respect to speed, phototactic orientation, specific growth rate, and in the presence of humic substances. Humic substances had a protective effect when studying the speed and specific growth rate. However, the degree of phototactic orientation decreased in UV-B radiation both with and without humic substances. The inhibition of O2 evolution and speed was most pronounced when using cutoff filters WG280 and WG295. The photosynthetic inhibitor DCMU (10−6 M) did not have any effect on the speed, but the 02 evolution decreased to zero. The effect of different wavelengths in the UV-B region on the speed of E.gracilis showed the maximum sensitivity at 280 and 290 nm.

Place, publisher, year, edition, pages
1993. Vol. 15, p. 715-722
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Natural Sciences
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URN: urn:nbn:se:mau:diva-37502DOI: 10.1093/plankt/15.6.715OAI: oai:DiVA.org:mau-37502DiVA, id: diva2:1508459
Available from: 2020-12-10 Created: 2020-12-10 Last updated: 2022-02-28Bibliographically approved

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Ekelund, Nils

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