% IMPORTANT: The following is UTF-8 encoded. This means that in the presence % of non-ASCII characters, it will not work with BibTeX 0.99 or older. % Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or % “biber”. @ARTICLE{Kuang:908268, author = {Kuang, Weiqi and Sanow, Stefan and Kelm, Jana M and Müller Linow, Mark and Andeer, Peter and Kohlheyer, Dietrich and Northen, Trent and Vogel, John P and Watt, Michelle and Arsova, Borjana}, title = {{N}-dependent dynamics of root growth and nitrate and ammonium uptake are altered by the bacterium {H}erbaspirillum seropedicae in the cereal model {B}rachypodium distachyon}, journal = {The journal of experimental botany}, volume = {73}, number = {15}, issn = {0022-0957}, address = {Oxford}, publisher = {Oxford Univ. Press}, reportid = {FZJ-2022-02502}, pages = {5306–5321}, year = {2022}, abstract = {Nitrogen (N) fixation in cereals by root-associated bacteria is a promising solution for reducing use of chemical N fertilizers in agriculture. However, plant and bacterial responses are unpredictable across environments. We hypothesized that cereal responses to N-fixing bacteria are dynamic, depending on N supply and time. To quantify the dynamics, a gnotobiotic, fabricated ecosystem (EcoFAB) was adapted to analyse N mass balance, to image shoot and root growth, and to measure gene expression of Brachypodium distachyon inoculated with the N-fixing bacterium Herbaspirillum seropedicae. Phenotyping throughput of EcoFAB-N was 25–30 plants h−1 with open software and imaging systems. Herbaspirillum seropedicae inoculation of B. distachyon shifted root and shoot growth, nitrate versus ammonium uptake, and gene expression with time; directions and magnitude depended on N availability. Primary roots were longer and root hairs shorter regardless of N, with stronger changes at low N. At higher N, H. seropedicae provided $11\%$ of the total plant N that came from sources other than the seed or the nutrient solution. The time-resolved phenotypic and molecular data point to distinct modes of action: at 5 mM NH4NO3 the benefit appears through N fixation, while at 0.5 mM NH4NO3 the mechanism appears to be plant physiological, with H. seropedicae promoting uptake of N from the root medium.Future work could fine-tune plant and root-associated microorganisms to growth and nutrient dynamics.}, cin = {IBG-2 / IBG-1}, ddc = {580}, cid = {I:(DE-Juel1)IBG-2-20101118 / I:(DE-Juel1)IBG-1-20101118}, pnm = {2171 - Biological and environmental resources for sustainable use (POF4-217)}, pid = {G:(DE-HGF)POF4-2171}, typ = {PUB:(DE-HGF)16}, pubmed = {35512445}, UT = {WOS:000813473600001}, doi = {10.1093/jxb/erac184}, url = {https://juser.fz-juelich.de/record/908268}, }