Steingrobe, Bernd

[["dc.bibliographiccitation.artnumber","121"],["dc.bibliographiccitation.journal","BMC Plant Biology"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Khorassani, Reza"],["dc.contributor.author","Hettwer, Ursula"],["dc.contributor.author","Ratzinger, Astrid"],["dc.contributor.author","Steingrobe, Bernd"],["dc.contributor.author","Karlovsky, Petr"],["dc.contributor.author","Claassen, Norbert"],["dc.date.accessioned","2018-11-07T08:53:06Z"],["dc.date.available","2018-11-07T08:53:06Z"],["dc.date.issued","2011"],["dc.description.abstract","Background: In soils with a low phosphorus (P) supply, sugar beet is known to intake more P than other species such as maize, wheat, or groundnut. We hypothesized that organic compounds exuded by sugar beet roots solubilize soil P and that this exudation is stimulated by P starvation. Results: Root exudates were collected from plants grown in hydroponics under low-and high-P availability. Exudate components were separated by HPLC, ionized by electrospray, and detected by mass spectrometry in the range of mass-to-charge ratio (m/z) from 100 to 1000. Eight mass spectrometric signals were enhanced at least 5-fold by low P availability at all harvest times. Among these signals, negative ions with an m/z of 137 and 147 were shown to originate from salicylic acid and citramalic acid. The ability of both compounds to mobilize soil P was demonstrated by incubation of pure substances with Oxisol soil fertilized with calcium phosphate. Conclusions: Root exudates of sugar beet contain salicylic acid and citramalic acid, the latter of which has rarely been detected in plants so far. Both metabolites solubilize soil P and their exudation by roots is stimulated by P deficiency. These results provide the first assignment of a biological function to citramalic acid of plant origin."],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft (DFG), Bonn, Germany [FOR546]"],["dc.identifier.doi","10.1186/1471-2229-11-121"],["dc.identifier.isi","000295014600001"],["dc.identifier.pmid","21871058"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6941"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/22328"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Biomed Central Ltd"],["dc.relation.issn","1471-2229"],["dc.rights","CC BY 2.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/2.0"],["dc.title","Citramalic acid and salicylic acid in sugar beet root exudates solubilize soil phosphorus"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","105"],["dc.bibliographiccitation.issue","1/2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","121"],["dc.bibliographiccitation.volume","332"],["dc.contributor.author","Samal, Debasmita"],["dc.contributor.author","Kovar, John"],["dc.contributor.author","Steingrobe, Bernd"],["dc.contributor.author","Sadana, Upkar"],["dc.contributor.author","Bhadoria, Pratapbhanu"],["dc.contributor.author","Claassen, Norbert"],["dc.date.accessioned","2019-07-09T11:52:33Z"],["dc.date.available","2019-07-09T11:52:33Z"],["dc.date.issued","2010"],["dc.description.abstract","Plant species differ in nutrient uptake efficiency. With a pot experiment, we evaluated potassium (K) uptake efficiency of maize (Zea mays L.), wheat (Triticum aestivum L.), and sugar beet (Beta vulgaris L.) grown on a low-K soil. Sugar beet and wheat maintained higher shoot K concentrations, indicating higher K uptake efficiency. Wheat acquired more K because of a greater root length to shoot dry weight ratio. Sugar beet accumulated more shoot K as a result of a 3- to 4-fold higher K influx as compared to wheat and maize, respectively. Nutrient uptake model NST 3.0 closely predicted K influx when 250 mg K kg−1 were added to the soil, but under-predicted K influx under low K supply. Sensitivity analysis showed that increasing soil solution K concentration (CLi) by a factor of 1.6–3.5 or buffer power (b) 10- to 50-fold resulted in 100% prediction of K influx. When both maximum influx (Imax) and b were increased by a factor of 2.5 in maize and wheat and 25 in sugar beet, the model could predict measured K influx 100%. In general, the parameter changes affected mostly calculated K influx of root hairs, demonstrating their possible important role in plant K efficiency."],["dc.identifier.doi","10.1007/s11104-009-0277-6"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5020"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/60220"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","Springer"],["dc.publisher.place","Dordrecht"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject.ddc","570"],["dc.title","Potassium uptake efficiency and dynamics in the rhizosphere of maize (Zea mays L.), wheat (Triticum aestivum L.), and sugar beet (Beta vulgaris L.) evaluated with a mechanistic model"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","1166"],["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Sustainability"],["dc.bibliographiccitation.lastpage","18"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Römer, Wilhelm"],["dc.contributor.author","Steingrobe, Bernd"],["dc.date.accessioned","2019-07-09T11:45:19Z"],["dc.date.available","2019-07-09T11:45:19Z"],["dc.date.issued","2018"],["dc.description.abstract","Between 2004 and 2011 the German Government funded 17 different projects to develop techniques of phosphorus recycling from wastewater, sewage sludges, and sewage sludge ashes. Several procedures had been tested, such as precipitation, adsorption, crystallization, nano-filtration, electro-dialysis, wet oxidation, pyrolysis, ion exchange, or bioleaching. From these techniques, 32 recycling products were tested by five different institutes for their agronomic efficiency, that is, their plant availability, mainly in pot experiments. This manuscript summarizes and compares these results to evaluate the suitability of different technical approaches to recycle P from wastes into applicable fertilizers. In total, 17 products of recycled sewage sludge ashes (SSA), one meat and bone meal ash, one sinter product of meat and bone meal, one cupola furnace slag, nine Ca phosphates from crystallization or from precipitation, Seaborne-Ca-phosphates, Seaborne-Mg-phosphate, and 3 different struvites were tested in comparison to controls with water soluble P, that is, either single super phosphate (SSP) or triple super phosphate (TSP). Sandy and loamy soils (pH: 4.7–6.8; CAL-P: 33–49 ppm) were used. The dominant test plant was maize. Phosphorus uptake from fertilizer was calculated by the P content of fertilized plants minus P content of unfertilized plants. Calculated uptake from all products was set in relation to uptake from water soluble P fertilizers (SSP or TSP) as a reference value (=100%). The following results were found: (1) plants took up less than 25% P in 65% of all SSA (15 products); (2) 6 products (26%) resulted in P uptake of 25 and 50% relatively to water soluble P. Only one Mg-P product resulted in an uptake of 67%. With cupola furnace slag, 24% P uptake was reached on sandy soil and nearly the same value as TSP on loamy soil. The uptake results of Ca phosphates were between 0 and 50%. Mg-P products from precipitation processes consistently showed a better P supply in relation to comparable Ca-P compounds. With struvite the same P uptake as for water soluble P was reached. The fertilizer effect of the tested P recycling products can clearly be differentiated: TSP = struvite > Mg-P = sinter-P > Ca-P, cupola-slag > thermally treated sewage sludge ashes > meat-and-bone meal ash = Fe-P."],["dc.identifier.doi","10.3390/su10041166"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15109"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59209"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.publisher","MDPI"],["dc.relation.eissn","2071-1050"],["dc.relation.issn","2071-1050"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","630"],["dc.title","Fertilizer Effect of Phosphorus Recycling Products"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]