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Title: Bioaugmentation with PGP-trace element tolerant bacterial consortia affects Pb uptake by Helianthus annuus grown on trace element polluted military soils
Authors: SARAN, Anabel 
IMPERATO, Valeria 
Fernandez, L.
Vannucchi, F.
Merini, L. J.
STEFFANIE, Natascha 
D'HAEN, Jan 
THIJS, Sofie 
Issue Date: 2020
Source: International journal of phytoremediation,
Status: Early view
Abstract: In this study, we sought to compose consortia of plant growth-promoting (PGP) and trace element tolerant bacteria, to improve plant growth and inhibit uptake and translocation of trace elements, eventually allowing the cultivation of profit making crops on trace elements polluted soils, reducing the risks of entrance of these elements into the food chain. Sunflower (Helianthus annuus L.) was grown on two polluted military soils (MS1 and MS2) in greenhouse microcosms and inoculated with three different bacterial consortia (C1, C2, C3). Growth and physiological status of the plants were unaffected during the experiment with the inoculation. After 2 months, plants were harvested. Consortium C2 and C3 decreased Pb shoot bioaccumulation by respectively 80-85% when plants were grown in the MS1 and even to concentrations below detection limit in plants grown in MS2. Differences in uptake and (sub)cellular localization of Pb and Cd in selected bacterial isolates were investigated in vitro by TEM-EDX. Pb absorption was observed by Bacillus wied manni ST9 and Bacillus paramycoides ST9 cultures. While adsorption at the bacterial cell wall was observed by Bacillus paramycoides ST9 and retention in the extracellular matrix by Cellulosi microbium cellulans ST54.
Notes: Saran, A (corresponding author), Consejo Nacl Invest Cient & Tecn, EEA Anguil INTA, La Pampa, Argentina.; Saran, A (corresponding author), Hasselt Univ, Ctr Environm Sci, Environm Biol, Diepenbeek, Belgium.
Other: Saran, A (corresponding author, Consejo Nacl Invest Cient & Tecn, EEA Anguil INTA, La Pampa, Argentina ; Hasselt Univ, Ctr Environm Sci, Environm Biol, Diepenbeek, Belgium.
Keywords: Commercial crop;inoculation;polluted soils
Document URI:
ISSN: 1522-6514
e-ISSN: 1549-7879
DOI: 10.1080/15226514.2020.1805408
ISI #: WOS:000559852900001
Rights: 2020 Taylor & Francis Group, LLC
Category: A1
Type: Journal Contribution
Validations: ecoom 2021
Appears in Collections:Research publications

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