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| Hauptseite > Publikationsdatenbank > Interspecies-cooperations of abutilon theophrasti with root colonizing microorganisms disarm BOA-OH allelochemicals |
| Hauptseite > Publikationsdatenbank > Interspecies-cooperations of abutilon theophrasti with root colonizing microorganisms disarm BOA-OH allelochemicals |
| Journal Article | FZJ-2017-06470 |
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2017
Landes Bioscience
Austin, Tex.
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Please use a persistent id in citations: doi:10.1080/15592324.2017.1358843
Abstract: A facultative, microbial micro-community colonizing roots of Abutilon theophrasti Medik. supports theplant in detoxifying hydroxylated benzoxazolinones. The root micro-community is composed of severalfungi and bacteria with Actinomucor elegans as a dominant species. The yeast Papiliotrema baii and thebacterium Pantoea ananatis are actively involved in the detoxification of hydroxylated benzoxazolinonesby generating H2O2. At the root surface, laccases, peroxidases and polyphenol oxidases cooperate forinitiating polymerization reactions, whereby enzyme combinations seem to differ depending on thehydroxylation position of BOA-OHs. A glucosyltransferase, able to glucosylate the natural benzoxazolinonedetoxification intermediates BOA-5- and BOA-6-OH, is thought to reduce oxidative overshoots bydamping BOA-OH induced H2O2 generation. Due to this detoxification network, growth of Abutilontheophrasti seedlings is not suppressed by BOA-OHs. Polymer coats have no negative influence.Alternatively, quickly degradable 6-hydroxy-5-nitrobenzo[d]oxazol-2(3H)-one can be produced by themicro-community member Pantoea ananatis at the root surfaces. The results indicate that Abutilontheophrasti has evolved an efficient strategy by recruiting soil microorganisms with special abilities fordifferent detoxification reactions which are variable and may be triggered by the allelochemicals structureand by environmental conditions.
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