Schützendübel, Andres

[["dc.bibliographiccitation.firstpage","887"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Plant Physiology"],["dc.bibliographiccitation.lastpage","898"],["dc.bibliographiccitation.volume","127"],["dc.contributor.author","Schützendübel, Andres"],["dc.contributor.author","Schwanz, Peter"],["dc.contributor.author","Teichmann, Thomas"],["dc.contributor.author","Gross, Kristina"],["dc.contributor.author","Langenfeld-Heyser, Rosemarie"],["dc.contributor.author","Godbold, Douglas L."],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2021-11-22T14:31:50Z"],["dc.date.available","2021-11-22T14:31:50Z"],["dc.date.issued","2001"],["dc.description.abstract","To investigate whether Cd induces common plant defense pathways or unspecific necrosis, the temporal sequence of physiological reactions, including hydrogen peroxide (H(2)O(2)) production, changes in ascorbate-glutathione-related antioxidant systems, secondary metabolism (peroxidases, phenolics, and lignification), and developmental changes, was characterized in roots of hydroponically grown Scots pine (Pinus sylvestris) seedlings. Cd (50 microM, 6 h) initially increased superoxide dismutase, inhibited the systems involved in H(2)O(2) removal (glutathione/glutathione reductase, catalase [CAT], and ascorbate peroxidase [APX]), and caused H(2)O(2) accumulation. Elongation of the roots was completely inhibited within 12 h. After 24 h, glutathione reductase activities recovered to control levels; APX and CAT were stimulated by factors of 5.5 and 1.5. Cell death was increased. After 48 h, nonspecific peroxidases and lignification were increased, and APX and CAT activities were decreased. Histochemical analysis showed that soluble phenolics accumulated in the cytosol of Cd-treated roots but lignification was confined to newly formed protoxylem elements, which were found in the region of the root tip that normally constitutes the elongation zone. Roots exposed to 5 microM Cd showed less pronounced responses and only a small decrease in the elongation rate. These results suggest that in cells challenged by Cd at concentrations exceeding the detoxification capacity, H(2)O(2) accumulated because of an imbalance of redox systems. This, in turn, may have triggered the developmental program leading to xylogenesis. In conclusion, Cd did not cause necrotic injury in root tips but appeared to expedite differentiation, thus leading to accelerated aging."],["dc.identifier.doi","10.1104/pp.127.3.887"],["dc.identifier.fs","27899"],["dc.identifier.pmid","11706171"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7452"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/93406"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.relation.issn","0032-0889"],["dc.rights.access","openAccess"],["dc.subject","Cadmium; physiological reactions"],["dc.subject.mesh","Antioxidants"],["dc.subject.mesh","Apoptosis"],["dc.subject.mesh","Ascorbate Peroxidases"],["dc.subject.mesh","Cadmium"],["dc.subject.mesh","Cell Differentiation"],["dc.subject.mesh","Glutathione Reductase"],["dc.subject.mesh","Hydrogen Peroxide"],["dc.subject.mesh","Hydroponics"],["dc.subject.mesh","Immunohistochemistry"],["dc.subject.mesh","Lignin"],["dc.subject.mesh","Lipids"],["dc.subject.mesh","Membrane Lipids"],["dc.subject.mesh","Oxidative Stress"],["dc.subject.mesh","Peroxidases"],["dc.subject.mesh","Phenols"],["dc.subject.mesh","Pinus"],["dc.subject.mesh","Plant Roots"],["dc.subject.mesh","Superoxide Dismutase"],["dc.title","Cadmium-induced changes in antioxidative systems, hydrogen peroxide content, and differentiation in Scots pine roots."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","91"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","Plant Biology"],["dc.bibliographiccitation.lastpage","99"],["dc.bibliographiccitation.volume","6"],["dc.contributor.author","Gafur, Abdul"],["dc.contributor.author","Schützendübel, Andres"],["dc.contributor.author","Langenfeld-Heyser, Rosemarie"],["dc.contributor.author","Fritz, Eberhard"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2018-06-25T12:50:20Z"],["dc.date.available","2018-06-25T12:50:20Z"],["dc.date.issued","2004"],["dc.description.abstract","Isolates of Paxillus involutus (Batsch) Fr. collected from different hosts and environmental conditions were screened for their ability to form ectomycorrhizal symbiosis with hybrid poplar P. x canescens (= Populus tremula L. x P. alba) in vitro. The ability to form ectomycorrhiza varied between the fungal isolates and was not correlated with the growth rate of the fungi on agar-based medium. The isolate MAJ, which was capable of mycorrhiza synthesis under axenic conditions, and the incompetent isolate NAU were characterized morphologically and anatomically. MAJ formed a typical hyphal mantle and a Hartig net, whereas NAU was not able to penetrate the host cell walls and caused thickenings of the outer cell walls of the host. MAJ, but not NAU, displayed strong H2O2 accumulation in the outer hyphal mantle. Increases in H2O2 in the outer epidermal walls and adjacent hyphae of the incompetent isolate were moderate. No increases of H2O2 in response to the mycobionts were found inside roots. Suggested functions of H2O2 production in the outer hyphal mantle of the compatible interaction are: growth regulation of the host's roots, defence against other invading microbes, or increasing plant-innate immunity. The system established here for P. x canescens compatible and incompetent fungal associations will be useful to take advantage of genomic information now available for poplar to study tree-fungal interactions at the molecular and physiological level."],["dc.identifier.doi","10.1055/s-2003-44718"],["dc.identifier.pmid","15095139"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15141"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.title","Compatible and incompetent Paxillus involutus isolates for ectomycorrhiza formation in vitro with poplar (Populus x canescens) differ in H2O2 production"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]