Cabeza, Ricardo A.

[["dc.bibliographiccitation.artnumber","1133"],["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Avenhaus, Ulrike"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Salinas-Riester, Gabriela"],["dc.contributor.author","Pommerenke, Claudia"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T10:19:28Z"],["dc.date.available","2018-11-07T10:19:28Z"],["dc.date.issued","2016"],["dc.description.abstract","Nitrogenase is an oxygen labile enzyme. Microaerobic conditions within the infected zone of nodules are maintained primarily by an oxygen diffusion barrier (ODB) located in the nodule cortex. Flexibility of the ODB is important for the acclimation processes of nodules in response to changes in external oxygen concentration. The hypothesis of the present study was that there are additional molecular mechanisms involved. Nodule activity of Medicago truncatula plants were continuously monitored during a change from 21 to 25 or 30% oxygen around root nodules by measuring nodule H-2 evolution. Within about 2 min of the increase in oxygen concentration, a steep decline in nitrogenase activity occurred. A quick recovery commenced about 8 min later. A qPCR-based analysis of the expression of genes for nitrogenase components showed a tendency toward upregulation during the recovery. The recovery resulted in a new constant activity after about 30 min, corresponding to approximately 90% of the pre-treatment level. An RNAseq-based comparative transcriptome profiling of nodules at that point in time revealed that genes for nodule-specific cysteine-rich (NCR) peptides, defensins, leghaemoglobin and chalcone and stilbene synthase were significantly upregulated when considered as a gene family. A gene for a nicotianamine synthase-like protein (Medtr1g084050) showed a strong increase in count number. The gene appears to be of importance for nodule functioning, as evidenced by its consistently high expression in nodules and a strong reaction to various environmental cues that influence nodule activity. A Tnt1-mutant that carries an insert in the coding sequence (cds) of that gene showed reduced nitrogen fixation and less efficient acclimation to an increased external oxygen concentration. It was concluded that sudden increases in oxygen concentration around nodules destroy nitrogenase, which is quickly counteracted by an increased neoformation of the enzyme. This reaction might be induced by increased formation of NCR peptides and necessitates an efficient iron supply to the bacteroid, which is probably mediated by nicotianamine. The paper is dedicated to the 85th birthday of Prof. Dr. Gunther Schilling, University of Halle/Wittenberg, Germany, https://de.wikipedia.org/wiki/Gunther_Schilling"],["dc.description.sponsorship","Open-Access Publikationsfonds 2015"],["dc.identifier.doi","10.3389/fpls.2015.01133"],["dc.identifier.isi","000367654300001"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/12764"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41665"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Frontiers Media Sa"],["dc.relation.issn","1664-462X"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Short-Term Molecular Acclimation Processes of Legume Nodules to Increased External Oxygen Concentration"],["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","6031"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","International Journal of Molecular Sciences"],["dc.bibliographiccitation.lastpage","6045"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Sulieman, Saad"],["dc.contributor.author","Senbayram, Mehmet"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T09:41:34Z"],["dc.date.available","2018-11-07T09:41:34Z"],["dc.date.issued","2014"],["dc.description.abstract","Legumes match the nodule number to the N demand of the plant. When a mutation in the regulatory mechanism deprives the plant of that ability, an excessive number of nodules are formed. These mutants show low productivity in the fields, mainly due to the high carbon burden caused through the necessity to supply numerous nodules. The objective of this study was to clarify whether through optimal conditions for growth and CO2 assimilation a higher nodule activity of a supernodulating mutant of Medicago truncatula (M. truncatula) can be induced. Several experimental approaches reveal that under the conditions of our experiments, the nitrogen fixation of the supernodulating mutant, designated as sunn (super numeric nodules), was not limited by photosynthesis. Higher specific nitrogen fixation activity could not be induced through short-or long-term increases in CO2 assimilation around shoots. Furthermore, a whole plant P depletion induced a decline in nitrogen fixation, however this decline did not occur significantly earlier in sunn plants, nor was it more intense compared to the wild-type. However, a distinctly different pattern of nitrogen fixation during the day/night cycles of the experiment indicates that the control of N-2 fixing activity of the large number of nodules is an additional problem for the productivity of supernodulating mutants."],["dc.identifier.doi","10.3390/ijms15046031"],["dc.identifier.fs","608778"],["dc.identifier.isi","000336841200057"],["dc.identifier.pmid","24727372"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11711"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33763"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mdpi Ag"],["dc.relation.issn","1422-0067"],["dc.rights.access","openAccess"],["dc.subject.mesh","Carbon Dioxide"],["dc.subject.mesh","Medicago truncatula"],["dc.subject.mesh","Nitrogen"],["dc.subject.mesh","Nitrogen Fixation"],["dc.subject.mesh","Phosphorus"],["dc.subject.mesh","Photosynthesis"],["dc.subject.mesh","Plant Shoots"],["dc.subject.mesh","Root Nodules, Plant"],["dc.title","The Activity of Nodules of the Supernodulating Mutant Mt(sunn) Is not Limited by Photosynthesis under Optimal Growth Conditions"],["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.artnumber","46264"],["dc.bibliographiccitation.journal","Scientific Reports"],["dc.bibliographiccitation.volume","7"],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Schulze, Joachim"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.date.accessioned","2018-11-07T10:25:02Z"],["dc.date.available","2018-11-07T10:25:02Z"],["dc.date.issued","2017"],["dc.description.abstract","Nitrogen fixation of Medicago truncatula is regulated by the nitrogen status of leaves through inducing a repeatedly occurring 24-h nodule activity rhythm that reduces per day nitrogen fixation. The hypotheses of the present study were that (1) long-term moderate whole-plant P deficiency in Medicago truncatula induces an according daily rhythm in nitrogenase activity comparable to that induced by nitrate application and (2), the changes in the nodule transcriptome that go along with a strong nitrogenase activity decline during the afternoon would be similar under P deficiency or after nitrate supply. The nodules of plants in a low P treatment developed a rhythmic pattern of activity that resembled the pattern following nitrate application. A comprehensive, RNAseq-based comparative transcriptome profiling of nodules during a repeated part of the rhythm revealed similarities between P deficiency versus nitrate supply. Under both treatments, the formation of nitrogenase was targeted by a reduction in the expression of genes for nodule-specific cysteine-rich peptides (NCR), and possibly also by a disturbance of the inner cell iron allocation. A strong reduction in the expression of leghemoglobin is likely to have restricted the supply of oxygen for respiration."],["dc.identifier.doi","10.1038/srep46264"],["dc.identifier.isi","000398978400001"],["dc.identifier.pmid","28393902"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14936"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/42771"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Nature Publishing Group"],["dc.relation.issn","2045-2322"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Nitrate application or P deficiency induce a decline in Medicago truncatula N-2-fixation by similar changes in the nodule transcriptome"],["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","333"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Plants"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Schwember, Andrés R."],["dc.contributor.author","Schulze, Joachim"],["dc.contributor.author","del Pozo, Alejandro"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.date.accessioned","2020-12-10T18:47:19Z"],["dc.date.available","2020-12-10T18:47:19Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.3390/plants8090333"],["dc.identifier.eissn","2223-7747"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16527"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78719"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Regulation of Symbiotic Nitrogen Fixation in Legume Root Nodules"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]