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Kinetics of glucose stimulatory effect on silica deposition and growth of natural populations of Fragilaria crotonensis
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SYSNO ASEP 0360257 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Kinetics of glucose stimulatory effect on silica deposition and growth of natural populations of Fragilaria crotonensis Author(s) Znachor, Petr (BC-A) RID, ORCID
Nedoma, Jiří (BC-A) RID, ORCID
Rychtecký, Pavel (BC-A) RID, ORCIDSource Title Phycological Research - ISSN 1322-0829
Roč. 59, č. 2 (2011), s. 123-128Number of pages 6 s. Language eng - English Country JP - Japan Keywords Fragilaria crotonensis ; glucose ; PDMPO ; phytoplankton Subject RIV DA - Hydrology ; Limnology R&D Projects GP206/07/P407 GA ČR - Czech Science Foundation (CSF) GA206/09/0309 GA ČR - Czech Science Foundation (CSF) GA206/08/0015 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z60170517 - HBU-Z, BC-A (2005-2011) UT WOS 000288868000007 DOI 10.1111/j.1440-1835.2011.00609.x Annotation In 2008–2009, we performed in situ experiments examining the effect of glucose addition on silica deposition kinetics and growth rates of Fragilaria crotonensis in the eutrophic Římov Reservoir (Czech Republic). Silica deposition kinetics was measured at 4-h intervals over a 24-h incubation with PDMPO [2-(4-pyridyl)-5{[4-dimethylaminoethylaminocarbamyl)- methoxy] phenyl}oxazole] fluorescence probe. A significant stimulatory effect of glucose supplemented at the concentration of 10-4 M on Fragilaria silification was observed at 20 and 24 h. Fragilaria growth rates almost doubled upon glucose enrichment compared with the untreated control at 24 h. In addition, we conducted a dose-response experiment testing the glucose additions from 10-8 to 10-3 M in a 24-h incubation. Glucose stimulated both Fragilaria silification and growth at concentrations >10–7 M, which might occasionally occur in a reservoir as a result of accidental contamination of water by organic pollution. Workplace Biology Centre (since 2006) Contact Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Year of Publishing 2012
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