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Authors Hernandez-del Amo, E; Dolinova, I; la Ramis-Jorba, G; Gich, F; Baneras, L
Author Full Name Hernandez-del Amo, Elena; Dolinova, Iva; la Ramis-Jorba, Gal; Gich, Frederic; Baneras, Lluis
Title Limited effect of radial oxygen loss on ammonia oxidizers in Typha angustifolia root hairs
Source SCIENTIFIC REPORTS
Language English
Document Type Article
Keywords Plus WASTE-WATER TREATMENT; CONSTRUCTED WETLANDS; NITRIFICATION-DENITRIFICATION; MICROBIAL COMMUNITIES; INTERNAL AERATION; NITROGEN REMOVAL; PLANT; RHIZOSPHERE; MACROPHYTES; BACTERIAL
Abstract The benefits of plant-microbe interactions have been exploited extensively for nutrient removal. Radial oxygen loss in aquatic macrophytes potentially promotes nitrification and accelerates nitrogen removal through coupled nitrification-denitrification process. Nitrification is likely the limiting activity for an effective nitrogen removal in wetlands. In this work, we have quantified the effect of radial oxygen losses in Typha angustifolia plants in environments of contrasting salinities, including a temporary lagoon, a constructed wetland, and a river estuary. In all sites, radial oxygen diffusion occurred mainly at a narrow band, from 1 to 5 cm from the root tip, and were almost absent at the tip and basal sections of the root (> 5 cm). Root sections with active oxygen diffusion tended to show higher bacterial and archaeal densities in the rhizoplane according to 16S rRNA gene abundance data, except at higher salinities. Archaeal amoA /bacterial amoA gene ratios were highly variable among sites. Archaeal nitrifiers were only favoured over bacteria on the root surface of Typha collected from the constructed wetland. Collectively, radial oxygen loss had little effect on the nitrifying microbial community at the smaller scale (differences according to root-section), and observed differences were more likely related to prevailing physicochemical conditions of the studied environments or to longterm effects of the root microenvironment (root vs sediment comparisons).
Author Address [Hernandez-del Amo, Elena; la Ramis-Jorba, Gal; Gich, Frederic; Baneras, Lluis] Univ Girona, Inst Aquat Ecol IEA, Grp Mol Microbial Ecol, Edifici Aulari Comu LEAR, Girona 17003, Catalonia, Spain; [Dolinova, Iva] Tech Univ Liberec, Inst Nanomat Adv Technol & Innovat, Studentska 2, Liberec 46117, Czech Republic; [la Ramis-Jorba, Gal] Ctr Tecnol Leitat, Innovacio 2, Terrassa 08225, Spain
Reprint Address Baneras, L (corresponding author), Univ Girona, Inst Aquat Ecol IEA, Grp Mol Microbial Ecol, Edifici Aulari Comu LEAR, Girona 17003, Catalonia, Spain.
E-mail Address lluis.banyeras@udg.edu
ORCID Number Hernandez-del Amo, Elena/0000-0001-9190-4221
Funding Agency and Grant Number University of Girona [MPCUdG2016/121, UdG PONT2019/09]; Catalan Government [2017SGR-548]
Funding Text Authors want to acknowledge fruitful discussions with Prof. Hans Brix for fixing up a useful set-up for estimating potential -O2 diffusion rates along the root axis. Dr. Sara Ramio-Pujol is acknowledged for assisting in field work and initial processing of samples. EHdA received a grant from the University of Girona (IF-UDG2013). This work was funded by University of Girona (Projects MPCUdG2016/121 and UdG PONT2019/09). IEA has been recognised as a consolidated research group by the Catalan Government (2017SGR-548).
Publisher NATURE RESEARCH
Publisher City BERLIN
Publisher Address HEIDELBERGER PLATZ 3, BERLIN, 14197, GERMANY
ISSN 2045-2322
29-Character Source Abbreviation SCI REP-UK
ISO Source Abbreviation Sci Rep
Publication Date SEP 24
Year Published 2020
Volume 10
Issue 1
Article Number 15694
Digital Object Identifier (DOI) 10.1038/s41598-020-72653-9
Page Count 13
Web of Science Category Multidisciplinary Sciences
Subject Category Science & Technology - Other Topics
Document Delivery Number QD2RG
Unique Article Identifier WOS:000615371600011
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