Ecophysiology, secondary pigments and ultrastructure of Chlainomonas sp. (Chlorophyta) from the European Alps compared with Chlamydomonas nivalis forming red snow.

FEMS Microbiology Ecology
Daniel RemiasAndreas Holzinger

Abstract

Red snow is a well-known phenomenon caused by microalgae thriving in alpine and polar regions during the melting season. The ecology and biodiversity of these organisms, which are adapted to low temperatures, high irradiance and freeze-thaw events, are still poorly understood. We compared two different snow habitats containing two different green algal genera in the European Alps, namely algae blooming in seasonal rock-based snowfields (Chlamydomonas nivalis) and algae dominating waterlogged snow bedded over ice (Chlainomonassp.). Despite the morphological similarity of the red spores found at the snow surface, we found differences in intracellular organization investigated by light and transmission electron microscopy and in secondary pigments investigated by chromatographic analysis in combination with mass spectrometry. Spores ofChlainomonassp. show clear differences fromChlamydomonas nivalisin cell wall arrangement and plastid organization. Active photosynthesis at ambient temperatures indicates a high physiological activity, despite no cell division being present. Lipid bodies containing the carotenoid astaxanthin, which produces the red color, dominate cells of both species, but are modified differently. While inChlainomo...Continue Reading

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Citations

Jul 22, 2016·Journal of Photochemistry and Photobiology. B, Biology·Andreas HolzingerDimitri D Deheyn
May 13, 2018·The Journal of Eukaryotic Microbiology·Dovilė BarcytėJosef Elster
Jun 13, 2019·The Journal of Eukaryotic Microbiology·Mariana S PandeiradaAntónio J Calado
Dec 12, 2019·Journal of Phycology·Ronald W Hoham, Daniel Remias
Mar 24, 2017·FEMS Microbiology Ecology·Rupert G PerkinsMarian L Yallop
Jan 19, 2018·FEMS Microbiology Ecology·Roman J DialS McKenzie Skiles
Aug 8, 2018·Nature Communications·Takahiro SegawaHiroshi Mori
Nov 1, 2016·FEMS Microbiology Ecology·Josef ElsterMax Häggblom
May 1, 2020·Frontiers in Microbiology·Casey B EngstromLynne M Quarmby
Jun 4, 2021·Journal of Microbiological Methods·Philipp DopplerOliver Spadiut

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Datasets Mentioned

BETA
LN897303
GU117574
GU117577

Methods Mentioned

BETA
light microscopy
transmission electron microscopy
PCR

Software Mentioned

MrBayes
MrModelTest
PAUP
Garli

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