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"]]