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@ARTICLE{Lanoue:7810,
author = {Lanoue, A. and Burlat, V. and Henkes, G.J. and Koch, I. and
Schurr, U. and Röse, U.S.R.},
title = {{D}e novo biosynthesis of defense root exudates in response
to {F}usarium attack in barley},
journal = {The new phytologist},
volume = {185},
issn = {0028-646X},
address = {Oxford [u.a.]},
publisher = {Wiley-Blackwell},
reportid = {PreJuSER-7810},
pages = {577 - 588},
year = {2010},
note = {This work was supported by the EU-funded Marie-Curie
training network BIORHIZ (Biotic interactions in the
rhizosphere as structuring forces for plant communities,
MRTN-CT-2003-505090). The authors gratefully acknowledge Dr
Jurgen Wildt for his assistance in performing the
<SUP>13</SUP>CO<INF>2</INF> experiment, Dr Gregoire Hummel
for assistance and discussions, and Dr Arnd Kuhn for
comments on an earlier version of the manuscript.},
abstract = {Despite recent advances in elucidation of natural products
in root exudates, there are significant gaps in our
understanding of the ecological significance of products in
the rhizosphere. • Here, we investigated the potential of
barley (Hordeum vulgare) to secrete defense root exudates
when challenged by the soilborne pathogen Fusarium
graminearum. • Liquid chromatography with photodiode array
detection (LC-DAD) was used to profile induced
small-molecular-weight exudates. Thus, t-cinnamic,
p-coumaric, ferulic, syringic and vanillic acids were
assigned to plant metabolism and were induced within 2 d
after Fusarium inoculation. Biological tests demonstrated
the ability of those induced root exudates to inhibit the
germination of F. graminearum macroconidia. In vivo labeling
experiments with 13CO2 revealed that the secreted t-cinnamic
acid was synthesized de novo within 2 d of fungal
infection. Simultaneously to its root exudation, t-cinnamic
acid was accumulated in the roots. Microscopic analysis
showed that nonlignin cell wall phenolics were induced not
only in necrosed zones but in all root tissues. • Results
suggest that barley plants under attack respond by de novo
biosynthesis and secretion of compounds with antimicrobial
functions that may mediate natural disease resistance.},
cin = {ZCH / ICG-3 / JARA-ENERGY},
ddc = {580},
cid = {I:(DE-Juel1)ZCH-20090406 / I:(DE-Juel1)ICG-3-20090406 /
$I:(DE-82)080011_20140620$},
pnm = {Terrestrische Umwelt},
pid = {G:(DE-Juel1)FUEK407},
shelfmark = {Plant Sciences},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000272893800021},
pubmed = {20699651},
doi = {10.1111/j.1469-8137.2009.03066.x},
url = {https://juser.fz-juelich.de/record/7810},
}