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Statements

Subject Item
n2:RIV%2F00216208%3A11310%2F13%3A10134050%21RIV14-GA0-11310___
rdf:type
skos:Concept n16:Vysledek
rdfs:seeAlso
http://dx.doi.org/10.1080/01490451.2012.697976
dcterms:description
The hyperarid core of the Atacama Desert represents one of the driest places on Earth with an exceptional occurrence of microbial life coping with extreme environmental stress factors. The gypsum crusts have already been found to harbor diverse communities in this area. Here, we present a Raman spectroscopic study, complemented by correlative microscopic imaging using SEM-BSE and fluorescence microscopy, of the endolithic microbial communities inside the Ca-sulphate crusts dominated by phototrophic microorganisms. Differences of pigment composition within different zones follow the cyanobacterial and algal colonization and also reveal the degradation of phycobiliproteins within the decayed biomass of cyanobacteria. Carotenoids of at least three different types were recognized, differing in dependence on the particular phylum of phototrophic microorganisms. Moreover, calcium oxalate monohydrate - whewellite - was found to be associated with the algae and hyphal associations living in the lower regions of the crust. The 785 nm excitation wavelength employed here was found to be the correct source for studying pigment composition as well as for the detection of the oxalate. A comparison of these results with those using 514.5 nm laser excitation which is widely adopted for the detection of carotenoids due to the resonance Raman effect is made and discussed. The hyperarid core of the Atacama Desert represents one of the driest places on Earth with an exceptional occurrence of microbial life coping with extreme environmental stress factors. The gypsum crusts have already been found to harbor diverse communities in this area. Here, we present a Raman spectroscopic study, complemented by correlative microscopic imaging using SEM-BSE and fluorescence microscopy, of the endolithic microbial communities inside the Ca-sulphate crusts dominated by phototrophic microorganisms. Differences of pigment composition within different zones follow the cyanobacterial and algal colonization and also reveal the degradation of phycobiliproteins within the decayed biomass of cyanobacteria. Carotenoids of at least three different types were recognized, differing in dependence on the particular phylum of phototrophic microorganisms. Moreover, calcium oxalate monohydrate - whewellite - was found to be associated with the algae and hyphal associations living in the lower regions of the crust. The 785 nm excitation wavelength employed here was found to be the correct source for studying pigment composition as well as for the detection of the oxalate. A comparison of these results with those using 514.5 nm laser excitation which is widely adopted for the detection of carotenoids due to the resonance Raman effect is made and discussed.
dcterms:title
Phototrophic Community in Gypsum Crust from the Atacama Desert Studied by Raman Spectroscopy and Microscopic Imaging Phototrophic Community in Gypsum Crust from the Atacama Desert Studied by Raman Spectroscopy and Microscopic Imaging
skos:prefLabel
Phototrophic Community in Gypsum Crust from the Atacama Desert Studied by Raman Spectroscopy and Microscopic Imaging Phototrophic Community in Gypsum Crust from the Atacama Desert Studied by Raman Spectroscopy and Microscopic Imaging
skos:notation
RIV/00216208:11310/13:10134050!RIV14-GA0-11310___
n16:predkladatel
n17:orjk%3A11310
n3:aktivita
n14:Z n14:P n14:I
n3:aktivity
I, P(GAP210/10/0467), P(GPP210/12/P330), Z(MSM0021620855)
n3:cisloPeriodika
5
n3:dodaniDat
n12:2014
n3:domaciTvurceVysledku
n21:8453403 n21:9951814
n3:druhVysledku
n15:J
n3:duvernostUdaju
n7:S
n3:entitaPredkladatele
n19:predkladatel
n3:idSjednocenehoVysledku
96135
n3:idVysledku
RIV/00216208:11310/13:10134050
n3:jazykVysledku
n20:eng
n3:klicovaSlova
Raman; phycobiliproteins; gypsum; cyanobacteria; Atacama Desert; algae
n3:klicoveSlovo
n6:algae n6:Atacama%20Desert n6:Raman n6:gypsum n6:cyanobacteria n6:phycobiliproteins
n3:kodStatuVydavatele
GB - Spojené království Velké Británie a Severního Irska
n3:kontrolniKodProRIV
[411BB649D00F]
n3:nazevZdroje
Geomicrobiology Journal
n3:obor
n10:DD
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
6
n3:projekt
n11:GPP210%2F12%2FP330 n11:GAP210%2F10%2F0467
n3:rokUplatneniVysledku
n12:2013
n3:svazekPeriodika
30
n3:tvurceVysledku
Ascaso, Carmen Howell G. M., Edwards Camara-Gallego, Beatriz Wierzchos, Jacek Jehlička, Jan Vítek, Petr
n3:wos
000322301100005
n3:zamer
n4:MSM0021620855
s:issn
0149-0451
s:numberOfPages
12
n22:doi
10.1080/01490451.2012.697976
n8:organizacniJednotka
11310