Changes in phenolic compounds and cellular ultrastructure of Arctic and Antarctic strains of Zygnema (Zygnematophyceae, Streptophyta) after exposure to experimentally enhanced UV to PAR ratio

We confirmed the production of protective phenolic compounds in all of the tested strains by HPLC analysis for both controls and UV-exposed samples. The phenolic content was higher after UV treatment, but the increase was significant in one strain only. The phenolics were most probably stored at the...

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Bibliographic Details
Published in:Microbial Ecology
Main Authors: Pichrtová, M. (Martina), Remias, D., Lewis, L.A., Holzinger, A.
Format: Article in Journal/Newspaper
Language:English
Published: 2013
Subjects:
green algae
phenolic compouns
UV stress
Antarctic
Arctic
Antarc*
Online Access:https://doi.org/10.1007/s00248-012-0096-9
http://hdl.handle.net/11104/0222048
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Summary:We confirmed the production of protective phenolic compounds in all of the tested strains by HPLC analysis for both controls and UV-exposed samples. The phenolic content was higher after UV treatment, but the increase was significant in one strain only. The phenolics were most probably stored at the cell periphery in vacuoles and cytoplasmic bodies that appear as electrondense particles when observed by TEM. The results indicate that phenolics are involved in UV protection of Zygnema and also revealed different responses to UV stress across the three strains, suggesting that other protection mechanisms may be involved in these organisms.

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