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@INPROCEEDINGS{Sanow:1050625,
author = {Sanow, Stefan and Kelm, Jana and Huesgen, Pitter and
Schaaf, Gabriel and Watt, Michelle and Arsova, Borjana},
title = {{M}olecular {S}trategies {U}nderlying
{P}seudomonas-{E}nhanced {G}rowth in {N}itrogen-{S}tressed
{B}rachypodium},
reportid = {FZJ-2026-00377},
year = {2025},
abstract = {Bacterial association with non-nodulating plants are
gaining increasing interest as means to promote more
sustainable agricultural practices. In particular, bacteria
with genomic predisposition to N-fixation are of interest
for reducing the environmental impact associated with
N-fertilizers.Pseudomonas koreensis (Pk) has been shown to
possess plant growth-promoting properties, but its effects
under limited N have not yet been investigated in planta.
Furthermore, Brachypodium’s time-resolved molecular
acclimatization to the presence of Pk is expected to show
the plasticity of the plant system under Pk’s modulation,
providing insight for future applications. This study
integrated noninvasive root and shoot phenotyping, elemental
analysis, δ15N natural abundance, proteomics and
lipidomics. Results showed phenotype recovery of
N-deficiency symptoms about two weeks post-inoculation, with
increased N content in inoculated plants but decreased C in
inoculated roots, indicating nutrient exchanges during
plant-microbe interaction (PMI). A trend toward decreased
δ15N signatures did not fully confirm N-fixation by Pk,
although Pk grew on N-free medium in vitro. Importantly,
proteomic and lipidomic changes were detected in
Brachypodium: proteomic shifts were driven by N limitation
and Pk inoculation- bringing central N metabolism protein
abundance of low N inoculated plants to levels similar of
high N plants. Lipidomic changes responded to nitrogen
limitation alone.In conclusion, associative plant-microbe
interactions offer multiple strategies to mitigate plant
abiotic stress, and the potential molecular mechanisms will
be discussed in this presentation.},
month = {Jul},
date = {2025-07-06},
organization = {International Brachypodium Research
Conference 2025, Ascona (Switzerland),
6 Jul 2025 - 10 Jul 2025},
subtyp = {Invited},
cin = {IBG-2},
cid = {I:(DE-Juel1)IBG-2-20101118},
pnm = {2171 - Biological and environmental resources for
sustainable use (POF4-217)},
pid = {G:(DE-HGF)POF4-2171},
typ = {PUB:(DE-HGF)6},
url = {https://juser.fz-juelich.de/record/1050625},
}