Gafur, Abdul

[["dc.bibliographiccitation.firstpage","49"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","HAYATI Journal of Biosciences"],["dc.bibliographiccitation.lastpage","53"],["dc.bibliographiccitation.volume","14"],["dc.contributor.author","Gafur, Abdul"],["dc.contributor.author","Schützendübel, Andres"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2018-06-18T12:09:24Z"],["dc.date.available","2018-06-18T12:09:24Z"],["dc.date.issued","2007"],["dc.description.abstract","Peroxidase activity of the hybrid poplar Populus×canescens (Ait.) Sm. (= P. tremula L. × P. alba L.) inoculated with compatible and incompetent isolates of Paxillus involutus (Batsch) Fr. was investigated. Screening of the ectomycorrhizal fungal isolates was initiated with exploration of mycelial growth characteristics and mycorrhizal ability in vitro with poplar. Both traits varied within the fungus although they did not seem to be genetically correlated. While isolates SCO1, NAU, and 031 grew faster than others, only isolates MAJ, SCO1, and 031 were able to form ectomycorrhiza with poplar. Isolates MAJ (compatible) and NAU (incompetent) were subsequently selected for further experiments. Activity of peroxidase, one of the defense-related enzymes, was examined in pure culture and short root components of compatible and incompetent interactions between poplar and P. involutus. Peroxidase activities increased significantly in poplar inoculated with incompetent isolate of the fungus compared to control, while induction of the same enzyme was not detected in compatible associations."],["dc.identifier.doi","10.4308/hjb.14.2.49"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/5896"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/15109"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.notes.status","final"],["dc.relation.issn","1978-3019"],["dc.rights","Goescholar"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","ectomycorrhiza; Paxillus involutus; peroxidase; plant defense; poplar"],["dc.subject.ddc","570"],["dc.title","Peroxidase Activity in Poplar Inoculated with Compatible and Incompetent Isolates of Paxillus involutus"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","121"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Mycorrhiza"],["dc.bibliographiccitation.lastpage","131"],["dc.bibliographiccitation.volume","17"],["dc.contributor.author","Langenfeld-Heyser, Rosemarie"],["dc.contributor.author","Gao, J."],["dc.contributor.author","Dučić, Tanja"],["dc.contributor.author","Tachd, P."],["dc.contributor.author","Lu, C. F."],["dc.contributor.author","Fritz, Eberhard"],["dc.contributor.author","Gafur, A."],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:31Z"],["dc.date.available","2017-09-07T11:49:31Z"],["dc.date.issued","2007"],["dc.description.abstract","In order to characterise the effect of ectomycorrhiza on Na+-responses of the salt-sensitive poplar hybrid Populus × canescens, growth and stress responses of Paxillus involutus (strain MAJ) were tested in liquid cultures in the presence of 20 to 500 mM NaCl, and the effects of mycorrhization on mineral nutrient accumulation and oxidative stress were characterised in mycorrhizal and non-mycorrhizal poplar seedlings exposed to 150 mM NaCl. Paxillus involutus was salt tolerant, showing biomass increases in media containing up to 500 mM NaCl after 4 weeks growth. Mycorrhizal mantle formation on poplar roots was not affected by 150 mM NaCl. Whole plant performance was positively affected by the fungus because total biomass was greater and leaves accumulated less Na+ than non-mycorrhizal plants. Energy dispersive X-ray microanalysis using transmission electron microscopy analysis of the influence of mycorrhization on the subcellular localisation of Na+ and Cl− in roots showed that the hyphal mantle did not diminish salt accumulation in root cell walls, indicating that mycorrhization did not provide a physical barrier against excess salinity. In the absence of salt stress, mycorrhizal poplar roots contained higher Na+ and Cl− concentrations than non-mycorrhizal poplar roots. Paxillus involutus hyphae produced H2O2 in the mantle but not in the Hartig net or in pure culture. Salt exposure resulted in H2O2 formation in cortical cells of both non-mycorrhizal and mycorrhizal poplar and stimulated peroxidase but not superoxide dismutase activities. This shows that mature ectomycorrhiza was unable to suppress salt-induced oxidative stress. Element analyses suggest that improved performance of mycorrhizal poplar under salt stress may result from diminished xylem loading of Na+ and increased supply with K+."],["dc.identifier.doi","10.1007/s00572-006-0084-3"],["dc.identifier.gro","3147289"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7443"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4904"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0940-6360"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Paxillus involutus mycorrhiza attenuate NaCl-stress responses in the salt-sensitive hybrid poplar Populus×canescens"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["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"]]