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A population of giant tailed virus-like particles associated with heterotrophic flagellates in a lake-type reservoir
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SYSNO ASEP 0450149 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název A population of giant tailed virus-like particles associated with heterotrophic flagellates in a lake-type reservoir Tvůrce(i) Weinbauer, M.G. (FR)
Dolan, J. R. (FR)
Šimek, Karel (BC-A) RID, ORCIDZdroj.dok. Aquatic Microbial Ecology. - : Inter-Research - ISSN 0948-3055
Roč. 76, č. 2 (2015), s. 111-116Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. DE - Německo Klíč. slova viral infection ; virus induced mortality ; burst size ; heterotrophic flagellates Vědní obor RIV EE - Mikrobiologie, virologie CEP GA13-00243S GA ČR - Grantová agentura ČR Institucionální podpora BC-A - RVO:60077344 UT WOS 000366331300003 EID SCOPUS 84946553151 DOI 10.3354/ame01769 Anotace Using transmission electron microscopy (TEM), a population of giant virus-like particles (VLPs) with a head diameter of ca. 405 nm and a flexible ca. 1100 nm long tail was detected in a lake-type reservoir. These giant VLPs were abundant in situ at the start of a survey period (3.3 × 104 particles ml−1) and increased by 7-fold within 96 h. This VLP population vanished in dialysis bag incubations of 0.8 μm-filtered reservoir water (free of bacterivorous flagellates) but increased markedly in the enhanced bacterivory treatment, i.e. 5 μm filtered water. In the latter, incubation, heterotrophic nanoflagellate (HNF) abundance increased approximately 15-fold during the study. A multiple regression analysis using microbial abundances and grazing rates as parameters indicated that 78% of the variability in the abundance of giant VLPs was explained by HNF abundance and grazing rates. Our data support the hypothesis that this virus population infects flagellates. Observation of a presumptive lysing flagellate cell suggests a viral burst size of 15. Estimations of decay and net production rates from dialysis bag incubations indicate that lysis due to giant viruses could cause between 10 to 60% of the mortality of the total flagellate community and, thus, viruses are potentially a significant factor shaping the population dynamics of fl a gellates in freshwater. Pracoviště Biologické centrum (od r. 2006) Kontakt Dana Hypšová, eje@eje.cz, Tel.: 387 775 214 Rok sběru 2016
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