Popko, Jennifer

[["dc.bibliographiccitation.firstpage","242"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Plant Biology"],["dc.bibliographiccitation.lastpage","258"],["dc.bibliographiccitation.volume","12"],["dc.contributor.author","Popko, Jennifer"],["dc.contributor.author","Hänsch, Robert"],["dc.contributor.author","Mendel, R.-R."],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Teichmann, Thomas"],["dc.date.accessioned","2017-09-07T11:49:56Z"],["dc.date.available","2017-09-07T11:49:56Z"],["dc.date.issued","2010"],["dc.description.abstract","The plant hormones auxin and abscisic acid may at first sight appear to be a conflicting pair of plant regulators. Abscisic acid content increases during stress and protects plant water status. The content of free auxin in the developing xylem of poplar declines during stress, while auxin conjugates increase. This indicates that specific down‐regulation of a signal transduction chain is important in plant adaptation to stress. Diminished auxin content may be a factor that adapts growth and wood development of poplar during adverse environmental conditions. To allow integration of environmental signals, abscisic acid and auxin must interact. Data are accumulating that abscisic acid–auxin cross‐talk exists in plants. However, knowledge of the role of plant hormones in the response of trees to stress is scarce. Our data show that differences in the localisation of ABA synthesis exist between the annual, herbaceous plant Arabidopsis and the perennial woody species, poplar."],["dc.identifier.doi","10.1111/j.1438-8677.2009.00305.x"],["dc.identifier.gro","3149779"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/6478"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","1435-8603"],["dc.title","The role of abscisic acid and auxin in the response of poplar to abiotic stress"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","61"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant molecular biology"],["dc.bibliographiccitation.lastpage","75"],["dc.bibliographiccitation.volume","74"],["dc.contributor.author","Behnke, Katja"],["dc.contributor.author","Kaiser, Andreas"],["dc.contributor.author","Zimmer, Ina"],["dc.contributor.author","Brüggemann, Nicolas"],["dc.contributor.author","Janz, Dennis"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Hampp, Rüdiger"],["dc.contributor.author","Hänsch, Robert"],["dc.contributor.author","Popko, Jennifer"],["dc.contributor.author","Schmitt-Kopplin, Philippe"],["dc.contributor.author","Ehlting, Barbara"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Barta, Csengele"],["dc.contributor.author","Loreto, Francesco"],["dc.contributor.author","Schnitzler, Jörg-Peter"],["dc.date.accessioned","2018-06-12T08:31:25Z"],["dc.date.available","2018-06-12T08:31:25Z"],["dc.date.issued","2010"],["dc.description.abstract","In plants, isoprene plays a dual role: (a) as thermo-protective agent proposed to prevent degradation of enzymes/membrane structures involved in photosynthesis, and (b) as reactive molecule reducing abiotic oxidative stress. The present work addresses the question whether suppression of isoprene emission interferes with genome wide transcription rates and metabolite fluxes in grey poplar (Populus x canescens) throughout the growing season. Gene expression and metabolite profiles of isoprene emitting wild type plants and RNAi-mediated non-isoprene emitting poplars were compared by using poplar Affymetrix microarrays and non-targeted FT-ICR-MS (Fourier transform ion cyclotron resonance mass spectrometry). We observed a transcriptional down-regulation of genes encoding enzymes of phenylpropanoid regulatory and biosynthetic pathways, as well as distinct metabolic down-regulation of condensed tannins and anthocyanins, in non-isoprene emitting genotypes during July, when high temperature and light intensities possibly caused transient drought stress, as indicated by stomatal closure. Under these conditions leaves of non-isoprene emitting plants accumulated hydrogen peroxide (H(2)O(2)), a signaling molecule in stress response and negative regulator of anthocyanin biosynthesis. The absence of isoprene emission under high temperature and light stress resulted transiently in a new chemo(pheno)type with suppressed production of phenolic compounds. This may compromise inducible defenses and may render non-isoprene emitting poplars more susceptible to environmental stress."],["dc.identifier.doi","10.1007/s11103-010-9654-z"],["dc.identifier.pmid","20526857"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/6811"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15024"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.relation.eissn","1573-5028"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","RNAi-mediated suppression of isoprene emission in poplar transiently impacts phenolic metabolism under high temperature and high light intensities: a transcriptomic and metabolomic analysis"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]