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Title: The Sycamore Maple Bacterial Culture Collection From a TNT Polluted Site Shows Novel Plant-Growth Promoting and Explosives Degrading Bacteria
Authors: Thijs, Sofie
Sillen, Wouter
Truyens, Sascha
Beckers, Bram
van Hamme, Jonathan
van Dillewijn, Pieter
Samyn, Pieter
Carleer, Robert
Weyens, Nele
Vangronsveld, Jaco
Issue Date: 2018
Citation: Frontiers in Plant Science, 9 (Art N° 1134)
Abstract: Military activities have worldwide introduced toxic explosives into the environment with considerable effects on soil and plant-associated microbiota. Fortunately, these microorganisms, and their collective metabolic activities, can be harnessed for site restoration via in situ phytoremediation. We characterized the bacterial communities inhabiting the bulk soil and rhizosphere of sycamore maple (Acer pseudoplatanus) in two chronically 2,4,6-trinitrotoluene (TNT) polluted soils. Three hundred strains were isolated, purified and characterized, a majority of which showed multiple plant growth promoting (PGP) traits. Several isolates showed high nitroreductase enzyme activity and concurrent TNT-transformation. A 12-member bacterial consortium, comprising selected TNT-detoxifying and rhizobacterial strains, significantly enhanced TNT removal from soil compared to non-inoculated plants, increased root and shoot weight, and the plants were less stressed than the un-inoculated plants as estimated by the responses of antioxidative enzymes. The sycamore maple tree (SYCAM) culture collection is a significant resource of plant-associated strains with multiple PGP and catalytic properties, available for further genetic and phenotypic discovery and use in field applications.
URI: http://hdl.handle.net/1942/28326
DOI: 10.3389/fpls.2018.01134
ISI #: 000440679500001
ISSN: 1664-462X
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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