Arctic, Antarctic, and temperate green algae Zygnema spp. under UV-B stress: vegetative cells perform better than pre-akinetes

Protoplasma
A HolzingerMartina Pichrtová

Abstract

Species of Zygnema form macroscopically visible mats in polar and temperate terrestrial habitats, where they are exposed to environmental stresses. Three previously characterized isolates (Arctic Zygnema sp. B, Antarctic Zygnema sp. C, and temperate Zygnema sp. S) were tested for their tolerance to experimental UV radiation. Samples of young vegetative cells (1 month old) and pre-akinetes (6 months old) were exposed to photosynthetically active radiation (PAR, 400-700 nm, 400 μmol photons m-2 s-1) in combination with experimental UV-A (315-400 nm, 5.7 W m-2, no UV-B), designated as PA, or UV-A (10.1 W m-2) + UV-B (280-315 nm, 1.0 W m-2), designated as PAB. The experimental period lasted for 74 h; the radiation period was 16 h PAR/UV-A per day, or with additional UV-B for 14 h per day. The effective quantum yield, generally lower in pre-akinetes, was mostly reduced during the UV treatment, and recovery was significantly higher in young vegetative cells vs. pre-akinetes during the experiment. Analysis of the deepoxidation state of the xanthophyll-cycle pigments revealed a statistically significant (p < 0.05) increase in Zygnema spp. C and S. The content of UV-absorbing phenolic compounds was significantly higher (p < 0.05) in you...Continue Reading

References

Jun 1, 1970·The Journal of Cell Biology·R J McLean, G F Pessoney
Dec 27, 2005·Micron : the International Research and Review Journal for Microscopy·Andreas Holzinger, Cornelius Lütz
Apr 30, 2008·Nucleic Acids Research·Karsten Suhre, Philippe Schmitt-Kopplin
Aug 8, 2009·Micron : the International Research and Review Journal for Microscopy·Andreas HolzingerCornelius Lütz
Sep 11, 2012·Micron : the International Research and Review Journal for Microscopy·Franziska KaplanAndreas Holzinger
May 23, 2014·Photochemical & Photobiological Sciences : Official Journal of the European Photochemistry Association and the European Society for Photobiology·Stamenković Marija, Hanelt Dieter
Jun 13, 2015·Journal of Photochemistry and Photobiology. B, Biology·Anja HartmannMarkus Ganzera
Oct 16, 2015·Interface Focus·Yuru Deng, Zakaria A Almsherqi
Apr 1, 2012·Journal of Phycology·Rosalina StanchevaJohn D Hall
Jun 1, 2016·Frontiers in Plant Science·Andreas Holzinger, Martina Pichrtová
Jul 22, 2016·Journal of Photochemistry and Photobiology. B, Biology·Andreas HolzingerDimitri D Deheyn

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Citations

Mar 10, 2020·Journal of Experimental Botany·Erwann ArcAndreas Holzinger
Jun 13, 2020·Journal of Experimental Botany·Henrik Buschmann, Andreas Holzinger
Sep 15, 2020·Trends in Plant Science·Jan de Vries, Till Ischebeck

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Methods Mentioned

BETA
transmission electron microscopy
Light microscopy

Software Mentioned

MetaCyc
LipidMaps
Adobe Photoshop
maXis
KNApSAcK
Genedata Expressionist
PAST
QuickPhoto Camera
MassTRIX
Statistica

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