Now showing 1 - 4 of 4
  • 2020Journal Article
    [["dc.bibliographiccitation.firstpage","110383"],["dc.bibliographiccitation.journal","Plant Science"],["dc.bibliographiccitation.volume","292"],["dc.contributor.author","Schulze, Joachim"],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Ballesteros, Gabriel"],["dc.contributor.author","Casieri, Leonardo"],["dc.contributor.author","Salinas, Gabriela"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.date.accessioned","2020-12-10T15:20:52Z"],["dc.date.available","2020-12-10T15:20:52Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1016/j.plantsci.2019.110383"],["dc.identifier.issn","0168-9452"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72834"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Ammonium acts systemically while nitrate exerts an additional local effect on Medicago truncatula nodules"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]
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  • 2015Journal Article
    [["dc.bibliographiccitation.firstpage","637"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","The Plant Journal"],["dc.bibliographiccitation.lastpage","648"],["dc.bibliographiccitation.volume","81"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Fischinger, Stephanie Anastasia"],["dc.contributor.author","Sulieman, Saad"],["dc.contributor.author","Avenhaus, Ulrike"],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","Hein, Hans"],["dc.contributor.author","Koester, Beke"],["dc.contributor.author","Baumgarten, Vanessa"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T10:01:25Z"],["dc.date.available","2018-11-07T10:01:25Z"],["dc.date.issued","2015"],["dc.description.abstract","Symbiotic nitrogen fixation is a process of considerable economic, ecological and scientific interest. The central enzyme nitrogenase reduces H+ alongside N-2, and the evolving H-2 allows a continuous and non-invasive in vivo measurement of nitrogenase activity. The objective of this study was to show that an elaborated set-up providing such measurements for periods as long as several weeks will produce specific insight into the nodule activity's dependence on environmental conditions and genotype features. A system was developed that allows the air-proof separation of a root/nodule and a shoot compartment. H-2 evolution in the root/nodule compartment can be monitored continuously. Nutrient solution composition, temperature, CO2 concentration and humidity around the shoots can concomitantly be maintained and manipulated. Medicago truncatula plants showed vigorous growth in the system when relying on nitrogen fixation. The set-up was able to provide specific insights into nitrogen fixation. For example, nodule activity depended on the temperature in their surroundings, but not on temperature or light around shoots. Increased temperature around the nodules was able to induce higher nodule activity in darkness versus light around shoots for a period of as long as 8h. Conditions that affected the N demand of the shoots (ammonium application, Mg or P depletion, super numeric nodules) induced consistent and complex daily rhythms in nodule activity. It was shown that long-term continuous measurements of nodule activity could be useful for revealing special features in mutants and could be of importance when synchronizing nodule harvests for complex analysis of their metabolic status."],["dc.identifier.doi","10.1111/tpj.12751"],["dc.identifier.isi","000350036200009"],["dc.identifier.pmid","25640854"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38013"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1365-313X"],["dc.relation.issn","0960-7412"],["dc.title","Long-term non-invasive and continuous measurements of legume nodule activity"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2014Journal Article
    [["dc.bibliographiccitation.firstpage","400"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","PLANT PHYSIOLOGY"],["dc.bibliographiccitation.lastpage","411"],["dc.bibliographiccitation.volume","164"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Koester, Beke"],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","Baumgarten, Vanessa"],["dc.contributor.author","Dirks, Jan"],["dc.contributor.author","Salinas-Riester, Gabriela"],["dc.contributor.author","Pommerenke, Claudia"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T09:47:01Z"],["dc.date.available","2018-11-07T09:47:01Z"],["dc.date.issued","2014"],["dc.description.abstract","The mechanism through which nitrate reduces the activity of legume nodules is controversial. The objective of the study was to follow Medicago truncatula nodule activity after nitrate provision continuously and to identify molecular mechanisms, which down-regulate the activity of the nodules. Nodule H-2 evolution started to decline after about 4 h of nitrate application. At that point in time, a strong shift in nodule gene expression (RNA sequencing) had occurred (1,120 differentially expressed genes). The most pronounced effect was the down-regulation of 127 genes for nodule-specific cysteine-rich peptides. Various other nodulins were also strongly down-regulated, in particular all the genes for leghemoglobins. In addition, shifts in the expression of genes involved in cellular iron allocation and mitochondrial ATP synthesis were observed. Furthermore, the expression of numerous genes for the formation of proteins and glycoproteins with no obvious function in nodules (e. g. germins, patatin, and thaumatin) was strongly increased. This occurred in conjunction with an up-regulation of genes for proteinase inhibitors, in particular those containing the Kunitz domain. The additionally formed proteins might possibly be involved in reducing nodule oxygen permeability. Between 4 and 28 h of nitrate exposure, a further reduction in nodule activity occurred, and the number of differentially expressed genes almost tripled. In particular, there was a differential expression of genes connected with emerging senescence. It is concluded that nitrate exerts rapid and manifold effects on nitrogenase activity. A certain degree of nitrate tolerance might be achieved when the down-regulatory effect on late nodulins can be alleviated."],["dc.identifier.doi","10.1104/pp.113.228312"],["dc.identifier.isi","000329447400031"],["dc.identifier.pmid","24285852"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/35015"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Amer Soc Plant Biologists"],["dc.relation.issn","1532-2548"],["dc.relation.issn","0032-0889"],["dc.title","An RNA Sequencing Transcriptome Analysis Reveals Novel Insights into Molecular Aspects of the Nitrate Impact on the Nodule Activity of Medicago truncatula"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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  • 2014Journal Article
    [["dc.bibliographiccitation.firstpage","6035"],["dc.bibliographiccitation.issue","20"],["dc.bibliographiccitation.journal","Journal of Experimental Botany"],["dc.bibliographiccitation.lastpage","6048"],["dc.bibliographiccitation.volume","65"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","von Stieglitz, Ilsabe"],["dc.contributor.author","Neumann, Janice"],["dc.contributor.author","Salinas-Riester, Gabriela"],["dc.contributor.author","Pommerenke, Claudia"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T09:33:09Z"],["dc.date.available","2018-11-07T09:33:09Z"],["dc.date.issued","2014"],["dc.description.abstract","Legume nodules are plant tissues with an exceptionally high concentration of phosphorus (P), which, when there is scarcity of P, is preferentially maintained there rather than being allocated to other plant organs. The hypothesis of this study was that nodules are affected before the P concentration in the organ declines during whole-plant P depletion. Nitrogen (N-2) fixation and P concentration in various organs were monitored during a whole-plant P-depletion process in Medicago truncatula. Nodule gene expression was profiled through RNA-seq at day 5 of P depletion. Until that point in time P concentration in leaves reached a lower threshold but was maintained in nodules. N-2-fixation activity per plant diverged from that of fully nourished plants beginning at day 5 of the P-depletion process, primarily because fewer nodules were being formed, while the activity of the existing nodules was maintained for as long as two weeks into P depletion. RNA-seq revealed nodule acclimation on a molecular level with a total of 1140 differentially expressed genes. Numerous genes for P remobilization from organic structures were increasingly expressed. Various genes involved in nodule malate formation were upregulated, while genes involved in fermentation were downregulated. The fact that nodule formation was strongly repressed with the onset of P deficiency is reflected in the differential expression of various genes involved in nodulation. It is concluded that plants follow a strategy to maintain N-2 fixation and viable leaf tissue as long as possible during whole-plant P depletion to maintain their ability to react to emerging new P sources (e. g. through active P acquisition by roots)."],["dc.identifier.doi","10.1093/jxb/eru341"],["dc.identifier.isi","000344658800026"],["dc.identifier.pmid","25151618"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/31906"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","1460-2431"],["dc.relation.issn","0022-0957"],["dc.title","RNA-seq transcriptome profiling reveals that Medicago truncatula nodules acclimate N-2 fixation before emerging P deficiency reaches the nodules"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]
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