Effects of rare earth elements on growth rate, lipids, fatty acids and pigments in microalgae

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388971%3A_____%2F17%3A00479289" target="_blank" >RIV/61388971:_____/17:00479289 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/67985939:_____/17:00479289 RIV/00216208:11310/17:10360957

Výsledek na webu

<a href="http://dx.doi.org/10.1111/pre.12180" target="_blank" >http://dx.doi.org/10.1111/pre.12180</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/pre.12180" target="_blank" >10.1111/pre.12180</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effects of rare earth elements on growth rate, lipids, fatty acids and pigments in microalgae

Popis výsledku v původním jazyce

The extensive exploitation of rare earth elements (REEs), particularly in electronic technologies and agriculture has concomitantly raised the environmental load. Their resulting effects on primary producers such as microalgae are, however, poorly understood. We have studied these effects on two microalgae of biotechnological interest. The yellow-green alga Trachydiscus minutus (Eustigmatophyceae, Ochrophyta), and the green alga Parachlorella kessleri (Trebouxiophyceae, Chlorophyta) were cultivated in mineral medium supplemented with 10molL(-1) chlorides of REEs: cerium, gadolinium, lanthanum, lutetium, praseodymium, scandium, and with monazite, which is a mineral rich in those elements. We observed growth rates at different mean light intensities (20, 50, 150 and 300molm(-2)s(-1)). The high growth rate of P. kessleri was not affected by the presence of any lanthanide, and decreased proportionally with light intensity (from 0.2 to 0.04 doublings per hour). In contrast, the growth rate of T. minutus was about three times lower compared with P. kessleri, with an optimum at 50molm(-2)s(-1) and decreased at higher or lower light intensities. In the presence of Ce3+, La3+ and Sc3+, the growth rate markedly increased to a value that corresponded to the growth rate in P. kessleri at the same light intensity. The composition and content of pigments and lipids were followed at the optimum light intensity for both species. The lipid content (percentage of dry weight) varied only slightly in the presence of individual rare earths. There was, however, an increase in saturated fatty acids at the expense of polyunsaturated fatty acids. The effect of REEs on pigments was variable: the presence of Ce3+, Gd3+, La3+ and Sc3+ caused an increase in the concentrations of major pigments such as lutein, violaxanthin, -carotene or chlorophylls, while Pr3+ and Lu3+ reduced them.

Název v anglickém jazyce

Effects of rare earth elements on growth rate, lipids, fatty acids and pigments in microalgae

Popis výsledku anglicky

The extensive exploitation of rare earth elements (REEs), particularly in electronic technologies and agriculture has concomitantly raised the environmental load. Their resulting effects on primary producers such as microalgae are, however, poorly understood. We have studied these effects on two microalgae of biotechnological interest. The yellow-green alga Trachydiscus minutus (Eustigmatophyceae, Ochrophyta), and the green alga Parachlorella kessleri (Trebouxiophyceae, Chlorophyta) were cultivated in mineral medium supplemented with 10molL(-1) chlorides of REEs: cerium, gadolinium, lanthanum, lutetium, praseodymium, scandium, and with monazite, which is a mineral rich in those elements. We observed growth rates at different mean light intensities (20, 50, 150 and 300molm(-2)s(-1)). The high growth rate of P. kessleri was not affected by the presence of any lanthanide, and decreased proportionally with light intensity (from 0.2 to 0.04 doublings per hour). In contrast, the growth rate of T. minutus was about three times lower compared with P. kessleri, with an optimum at 50molm(-2)s(-1) and decreased at higher or lower light intensities. In the presence of Ce3+, La3+ and Sc3+, the growth rate markedly increased to a value that corresponded to the growth rate in P. kessleri at the same light intensity. The composition and content of pigments and lipids were followed at the optimum light intensity for both species. The lipid content (percentage of dry weight) varied only slightly in the presence of individual rare earths. There was, however, an increase in saturated fatty acids at the expense of polyunsaturated fatty acids. The effect of REEs on pigments was variable: the presence of Ce3+, Gd3+, La3+ and Sc3+ caused an increase in the concentrations of major pigments such as lutein, violaxanthin, -carotene or chlorophylls, while Pr3+ and Lu3+ reduced them.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10606 - Microbiology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Phycological Research

ISSN

1322-0829

e-ISSN

—

Svazek periodika

65

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

226-234

Kód UT WoS článku

000404727400006

EID výsledku v databázi Scopus

2-s2.0-85018390479