Wildhagen, Henning

[["dc.bibliographiccitation.firstpage","129"],["dc.bibliographiccitation.issue","1"],["dc.bibliographiccitation.journal","New Phytologist"],["dc.bibliographiccitation.lastpage","141"],["dc.bibliographiccitation.volume","194"],["dc.contributor.author","Janz, Dennis"],["dc.contributor.author","Lautner, Silke"],["dc.contributor.author","Wildhagen, Henning"],["dc.contributor.author","Behnke, Katja"],["dc.contributor.author","Schnitzler, Jörg-Peter"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Fromm, Jörg"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:19Z"],["dc.date.available","2017-09-07T11:49:19Z"],["dc.date.issued","2012"],["dc.description.abstract","Summary - Salinity causes osmotic stress and limits biomass production of plants. The goal of this study was to investigate mechanisms underlying hydraulic adaptation to salinity. - Anatomical, ecophysiological and transcriptional responses to salinity were investigated in the xylem of a salt‐sensitive (Populus × canescens) and a salt‐tolerant species (Populus euphratica). - Moderate salt stress, which suppressed but did not abolish photosynthesis and radial growth in P. × canescens, resulted in hydraulic adaptation by increased vessel frequencies and decreased vessel lumina. Transcript abundances of a suite of genes (FLA, COB‐like, BAM, XET, etc.) previously shown to be activated during tension wood formation, were collectively suppressed in developing xylem, whereas those for stress and defense‐related genes increased. A subset of cell wall‐related genes was also suppressed in salt‐exposed P. euphratica, although this species largely excluded sodium and showed no anatomical alterations. Salt exposure influenced cell wall composition involving increases in the lignin : carbohydrate ratio in both species. - In conclusion, hydraulic stress adaptation involves cell wall modifications reciprocal to tension wood formation that result in the formation of a novel type of reaction wood in upright stems named ‘pressure wood’. Our data suggest that transcriptional co‐regulation of a core set of genes determines reaction wood composition."],["dc.identifier.doi","10.1111/j.1469-8137.2011.03975.x"],["dc.identifier.gro","3147274"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7404"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4894"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0028-646X"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Salt stress induces the formation of a novel type of ‘pressure wood’ in two Populus species"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","submitted_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1902"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Plant Physiology"],["dc.bibliographiccitation.lastpage","1917"],["dc.bibliographiccitation.volume","151"],["dc.contributor.author","Luo, Zhi-Bin"],["dc.contributor.author","Janz, Dennis"],["dc.contributor.author","Jiang, Xiangning"],["dc.contributor.author","Göbel, Cornelia"],["dc.contributor.author","Wildhagen, Henning"],["dc.contributor.author","Tan, Yupeng"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Feussner, Ivo"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:32Z"],["dc.date.available","2017-09-07T11:49:32Z"],["dc.date.issued","2009"],["dc.description.abstract","Ectomycorrhizas (EMs) alleviate stress tolerance of host plants, but the underlying molecular mechanisms are unknown. To elucidate the basis of EM-induced physiological changes and their involvement in stress adaptation, we investigated metabolic and transcriptional profiles in EM and non-EM roots of gray poplar (Populus × canescens) in the presence and absence of osmotic stress imposed by excess salinity. Colonization with the ectomycorrhizal fungus Paxillus involutus increased root cell volumes, a response associated with carbohydrate accumulation. The stress-related hormones abscisic acid and salicylic acid were increased, whereas jasmonic acid and auxin were decreased in EM compared with non-EM roots. Auxin-responsive reporter plants showed that auxin decreased in the vascular system. The phytohormone changes in EMs are in contrast to those in arbuscular mycorrhizas, suggesting that EMs and arbuscular mycorrhizas recruit different signaling pathways to influence plant stress responses. Transcriptome analyses on a whole genome poplar microarray revealed activation of genes related to abiotic and biotic stress responses as well as of genes involved in vesicle trafficking and suppression of auxin-related pathways. Comparative transcriptome analysis indicated EM-related genes whose transcript abundances were independent of salt stress and a set of salt stress-related genes that were common to EM non-salt-stressed and non-EM salt-stressed plants. Salt-exposed EM roots showed stronger accumulation of myoinositol, abscisic acid, and salicylic acid and higher K+-to-Na+ ratio than stressed non-EM roots. In conclusion, EMs activated stress-related genes and signaling pathways, apparently leading to priming of pathways conferring abiotic stress tolerance."],["dc.identifier.doi","10.1104/pp.109.143735"],["dc.identifier.gro","3147308"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/7448"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4914"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0032-0889"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Upgrading Root Physiology for Stress Tolerance by Ectomycorrhizas: Insights from Metabolite and Transcriptional Profiling into Reprogramming for Stress Anticipation"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]