Pena, Rodica

[["dc.bibliographiccitation.firstpage","879"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","Functional Plant Biology"],["dc.bibliographiccitation.lastpage","889"],["dc.bibliographiccitation.volume","37"],["dc.contributor.author","Winkler, Jana B."],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Simon, Judy"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Offermann, Christine"],["dc.contributor.author","Sternad, Wolfgang"],["dc.contributor.author","Clemenz, Christian"],["dc.contributor.author","Naumann, Pascale Sarah"],["dc.contributor.author","Gasche, Rainer"],["dc.contributor.author","Kögel-Knabner, Ingrid"],["dc.contributor.author","Gessler, Arthur"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:50:45Z"],["dc.date.available","2017-09-07T11:50:45Z"],["dc.date.issued","2010"],["dc.description.abstract","The goal of this work was to increase the understanding of factors regulating nitrogen (N) competition between roots and soil microbes. For this purpose, root assimilate supply was diminished or abolished in beech (Fagus sylvatica L.) seedlings by girdling, drought stress or a combination of both factors. This was revealed by 13C tracer abundance in root tips after 13CO2 pulse labelling of the shoots. Analysis of different root tip fractions revealed that only 6% were ectomycorrhizal. Carbon (C) allocation to ectomycorrhizal and vital non-mycorrhizal root tips was ~26% higher than to distorted root tips. Drought resulted in ~30% increased ammonium (NH4+) and amino acid concentrations in roots and ~65% increased soil NH4+ concentrations, probably because of lower consumption of NH4+ by free-living microorganisms. Root uptake of glutamine of 13 nmol g–1 fresh mass h–1 decreased 2-fold with drought, although the number of vital root tips did not decrease. Carbon content in biomass of free-living microbes increased with glucose application regardless of drought, resulting in significant depletion in soil nitrate (NO3–), root NH4+ and amino acid concentrations. Our results suggest that the root–soil system of young beech trees was C-limited, and this prevented amino acid metabolism in roots and microbial NO3– consumption in the soil, thereby exerting feedback inhibition on uptake of inorganic N by roots. We suggest that rhizodeposition is a key link in regulating the plant–microbial N balance."],["dc.identifier.doi","10.1071/fp09309"],["dc.identifier.gro","3147814"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5143"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1445-4408"],["dc.title","Carbon and nitrogen balance in beech roots under competitive pressure of soil-borne microorganisms induced by girdling, drought and glucose application"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","657"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","668"],["dc.bibliographiccitation.volume","369"],["dc.contributor.author","Guo, Chanjuan"],["dc.contributor.author","Simon, Judy"],["dc.contributor.author","Gasche, Rainer"],["dc.contributor.author","Naumann, Pascale Sarah"],["dc.contributor.author","Bimüller, Carolin"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Kögel-Knabner, Ingrid"],["dc.contributor.author","Zeller, Bernd"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Dannenmann, Michael"],["dc.date.accessioned","2017-09-07T11:49:20Z"],["dc.date.available","2017-09-07T11:49:20Z"],["dc.date.issued","2013"],["dc.description.abstract","Aims Our aims were to characterize the fate of leaf-litter-derived nitrogen in the plant-soil-microbe system of a temperate beech forest of Southern Germany and to identify its importance for N nutrition of beech seedlings. Methods 15N-labelled leaf litter was traced in situ into abiotic and biotic N pools in mineral soil as well as into beech seedlings and mycorrhizal root tips over three growing seasons. Results There was a rapid transfer of 15N into the mineral soil already 21 days after tracer application with soil microbial biomass initially representing the dominant litter-N sink. However, 15N recovery in non-extractable soil N pools strongly increased over time and subsequently became the dominant 15N sink. Recovery in plant biomass accounted for only 0.025 % of 15N excess after 876 days. After three growing seasons, 15N excess recovery was characterized by the following sequence: non-extractable soil N >> extractable soil N including microbial biomass >> plant biomass > ectomycorrhizal root tips. Conclusions After quick vertical dislocation and cycling through microbial N pools, there was a rapid stabilization of leaf-litter-derived N in non-extractable N pools of the mineral soil. Very low 15N recovery in beech seedlings suggests a high importance of other N sources such as root litter for N nutrition of beech understorey."],["dc.identifier.doi","10.1007/s11104-013-1603-6"],["dc.identifier.gro","3147263"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4889"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0032-079X"],["dc.title","Minor contribution of leaf litter to N nutrition of beech (Fagus sylvatica) seedlings in a mountainous beech forest of Southern Germany"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1622"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Soil Biology and Biochemistry"],["dc.bibliographiccitation.lastpage","1631"],["dc.bibliographiccitation.volume","41"],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Simon, Judy"],["dc.contributor.author","Gasche, Rainer"],["dc.contributor.author","Holst, Jutta"],["dc.contributor.author","Naumann, Pascale Sarah"],["dc.contributor.author","Kögel-Knabner, Ingrid"],["dc.contributor.author","Knicker, Heike"],["dc.contributor.author","Mayer, Helmut"],["dc.contributor.author","Schloter, Michael"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Papen, Hans"],["dc.date.accessioned","2017-09-07T11:49:15Z"],["dc.date.available","2017-09-07T11:49:15Z"],["dc.date.issued","2009"],["dc.description.abstract","Nitrogen (N) cycling in terrestrial ecosystems is complex since it involves the closely interwoven processes of both N uptake by plants and microbial turnover of a variety of N metabolites. Major interactions between plants and microorganisms involve competition for the same N species, provision of plant nutrients by microorganisms and labile carbon (C) supply to microorganisms by plants via root exudation. Despite these close links between microbial N metabolism and plant N uptake, only a few studies have tried to overcome isolated views of plant N acquisition or microbial N fluxes. In this study we studied competitive patterns of N fluxes in a mountainous beech forest ecosystem between both plants and microorganisms by reducing rhizodeposition by tree girdling. Besides labile C and N pools in soil, we investigated total microbial biomass in soil, microbial N turnover (N mineralization, nitrification, denitrification, microbial immobilization) as well as microbial community structure using denitrifiers and mycorrhizal fungi as model organisms for important functional groups. Furthermore, plant uptake of organic and inorganic N and N metabolite profiles in roots were determined. Surprisingly plants preferred organic N over inorganic N and nitrate (NO3−) over ammonium (NH4+) in all treatments. Microbial N turnover and microbial biomass were in general negatively correlated to plant N acquisition and plant N pools, thus indicating strong competition for N between plants and free living microorganisms. The abundance of the dominant mycorrhizal fungi Cenococcum geophilum was negatively correlated to total soil microbial biomass but positively correlated to glutamine uptake by beech and amino acid concentration in fine roots indicating a significant role of this mycorrhizal fungus in the acquisition of organic N by beech. Tree girdling in general resulted in a decrease of dissolved organic carbon and total microbial biomass in soil while the abundance of C. geophilum remained unaffected, and N uptake by plants was increased. Overall, the girdling-induced decline of rhizodeposition altered the competitive balance of N partitioning in favour of beech and its most abundant mycorrhizal symbiont and at the expense of heterotrophic N turnover by free living microorganisms in soil. Similar to tree girdling, drought periods followed by intensive drying/rewetting events seemed to have favoured N acquisition by plants at the expense of free living microorganisms."],["dc.identifier.doi","10.1016/j.soilbio.2009.04.024"],["dc.identifier.gro","3147229"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4861"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0038-0717"],["dc.title","Tree girdling provides insight on the role of labile carbon in nitrogen partitioning between soil microorganisms and adult European beech"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","733"],["dc.bibliographiccitation.issue","12"],["dc.bibliographiccitation.journal","Forests"],["dc.bibliographiccitation.volume","9"],["dc.contributor.author","Magh, Ruth-Kristina"],["dc.contributor.author","Yang, Fengli"],["dc.contributor.author","Rehschuh, Stephanie"],["dc.contributor.author","Burger, Martin"],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Burzlaff, Tim"],["dc.contributor.author","Ivanković, Mladen"],["dc.contributor.author","Rennenberg, Heinz"],["dc.date.accessioned","2020-12-10T18:47:05Z"],["dc.date.available","2020-12-10T18:47:05Z"],["dc.date.issued","2018"],["dc.description.sponsorship","Waldklimafonds"],["dc.identifier.doi","10.3390/f9120733"],["dc.identifier.eissn","1999-4907"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78636"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.publisher","MDPI"],["dc.relation.eissn","1999-4907"],["dc.rights","https://creativecommons.org/licenses/by/4.0/"],["dc.title","Nitrogen Nutrition of European Beech Is Maintained at Sufficient Water Supply in Mixed Beech-Fir Stands"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Geophysical Research Abstracts"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Simon, Judy"],["dc.contributor.author","Gasche, Rainer"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Papen, Hans"],["dc.date.accessioned","2018-11-26T14:44:17Z"],["dc.date.available","2018-11-26T14:44:17Z"],["dc.date.issued","2010"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56964"],["dc.language.iso","en"],["dc.notes.status","fcwi"],["dc.relation.conference","EGU General Assembly"],["dc.relation.eventend","2010-05-07"],["dc.relation.eventlocation","Vienna, Austria"],["dc.relation.eventstart","2010-05-02"],["dc.title","Tree girdling as a tool to study plant-microbe C- and N interactions in beech rhizsophere"],["dc.type","conference_abstract"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","520"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","New Phytologist"],["dc.bibliographiccitation.lastpage","528"],["dc.bibliographiccitation.volume","199"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Tejedor, Javier"],["dc.contributor.author","Zeller, Bernd"],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:36Z"],["dc.date.available","2017-09-07T11:49:36Z"],["dc.date.issued","2013"],["dc.description.abstract","Summary - The spatiotemporal dynamics of, and interspecific differences in, the acquisition of litter‐derived nitrogen (N) by natural assemblages of ectomycorrhizal root tips are poorly understood. - Small cylindrical mesh bags containing 15N‐labelled beech (Fagus sylvatica) leaf litter that permit hyphal but not root ingrowth were inserted vertically into the top soil layer of an old‐growth beech forest. The lateral transfer of 15N into the circumjacent soil, roots, microbes and ectomycorrhizas was measured during an 18‐month exposure period. - Ectomycorrhial fungi (EMF) showed large interspecific variation in the temporal pattern and extent of 15N accumulation. Initially, when N was mainly available from the leachate, microbes were more efficient at N immobilization than the majority of EMF, but distinct fungal species also showed significant 15N accumulation. During later phases, the enrichment of 15N in Tomentella badia was higher than in microbes and other EMF species. Roots and soil accumulated 15N with a large delay compared with microbes and EMF. - Because approximately half of the studied fungal species had direct access to N from leaf litter and the remainder to N from leached compounds, we suggest that EMF diversity facilitates the N utilization of the host by capturing N originating from early‐released solutes and late degradation products from a recalcitrant source."],["dc.identifier.doi","10.1111/nph.12272"],["dc.identifier.gro","3147332"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4938"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0028-646X"],["dc.title","Interspecific temporal and spatial differences in the acquisition of litter-derived nitrogen by ectomycorrhizal fungal assemblages"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","89"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","114"],["dc.bibliographiccitation.volume","418"],["dc.contributor.author","Simon, Judy"],["dc.contributor.author","Dannenmann, Michael"],["dc.contributor.author","Pena, Rodica"],["dc.contributor.author","Gessler, Arthur"],["dc.contributor.author","Rennenberg, Heinz"],["dc.date.accessioned","2020-12-10T14:11:46Z"],["dc.date.available","2020-12-10T14:11:46Z"],["dc.date.issued","2017"],["dc.identifier.doi","10.1007/s11104-017-3293-y"],["dc.identifier.eissn","1573-5036"],["dc.identifier.issn","0032-079X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71201"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Nitrogen nutrition of beech forests in a changing climate: importance of plant-soil-microbe water, carbon, and nitrogen interactions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]