Wildhagen, Henning

[["dc.bibliographiccitation.firstpage","304"],["dc.bibliographiccitation.issue","2"],["dc.bibliographiccitation.journal","Environmental and Experimental Botany"],["dc.bibliographiccitation.lastpage","311"],["dc.bibliographiccitation.volume","72"],["dc.contributor.author","Luo, Zhi-Bin"],["dc.contributor.author","Li, Ke"],["dc.contributor.author","Gai, Ying"],["dc.contributor.author","Göbel, Cornelia"],["dc.contributor.author","Wildhagen, Henning"],["dc.contributor.author","Jiang, Xiangning"],["dc.contributor.author","Feußner, Ivo"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Polle, Andrea"],["dc.date.accessioned","2017-09-07T11:49:32Z"],["dc.date.available","2017-09-07T11:49:32Z"],["dc.date.issued","2011"],["dc.description.abstract","Ectomycorrhizas (EMs) are mutualistic associations between soil fungi and plant roots. Although the physical interaction occurs only in roots, mycorrhizas may alter the physiology of the whole plant, resulting in changes in host responses to abiotic stress. To elucidate the influence of an ectomycorrhizal fungus on leaf physiology and performance under salt stress, we analysed the levels of nutrient elements, phytohormones, carbohydrates, amino compounds and fatty acids in leaves of Populus × canescens. The poplars were cultivated either in the presence or absence of Paxillus involutus and either with or without salt stress imposed by 150 mM NaCl. Leaves of ectomycorrhizal plants displayed higher quantum yield of photochemistry (ΦPSII), increased concentrations of phosphorus and potassium, decreased concentrations of galactose, increased concentrations of the stress metabolite γ-amino butyric acid and a lower unsaturated-to-saturated fatty acid ratios than those of non-ectomycorrhizal plants. Salt exposure of P. × canescens led to leaf chlorosis and shedding, decreases in ΦPSII, K+-to-Na+ ratio, 9Z-hexadecenoic acid, 9Z-octadecenoic acid and unsaturated-to-saturated fatty acid ratio, and increases in ABA, glucose, fructose and some amino compounds. Under salinity leaves of ectomycorrhizal plants showed an alleviation of leaf chlorosis, improved water status, higher ΦPSII and K+-to-Na+ ratio, less accumulation of major amino compounds and lower unsaturated-to-saturated fatty acid ratios than those of non-mycorrhizal plants. These results indicate that ectomycorrhizas attenuate salinity induced injury in leaves of P. × canescens, which may be ascribed to the improved nutrient status, osmo-regulation and changes in fatty acid composition in leaves of ectomycorrhizal plants."],["dc.identifier.doi","10.1016/j.envexpbot.2011.04.008"],["dc.identifier.gro","3147312"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/4918"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0098-8472"],["dc.title","The ectomycorrhizal fungus (Paxillus involutus) modulates leaf physiology of poplar towards improved salt tolerance"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1515"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Plant Physiology"],["dc.bibliographiccitation.lastpage","1529"],["dc.bibliographiccitation.volume","160"],["dc.contributor.author","Larisch, Christina"],["dc.contributor.author","Dittrich, Marcus"],["dc.contributor.author","Wildhagen, Henning"],["dc.contributor.author","Lautner, Silke"],["dc.contributor.author","Fromm, Jörg"],["dc.contributor.author","Polle, Andrea"],["dc.contributor.author","Hedrich, Rainer"],["dc.contributor.author","Rennenberg, Heinz"],["dc.contributor.author","Müller, Tobias"],["dc.contributor.author","Ache, Peter"],["dc.date.accessioned","2017-09-07T11:50:44Z"],["dc.date.available","2017-09-07T11:50:44Z"],["dc.date.issued","2012"],["dc.description.abstract","Understanding seasonality and longevity is a major challenge in tree biology. In woody species, growth phases and dormancy follow one another consecutively. In the oldest living individuals, the annual cycle may run for more than 1,000 years. So far, however, not much is known about the processes triggering reactivation from dormancy. In this study, we focused on wood rays, which are known to play an important role in tree development. The transition phase from dormancy to flowering in early spring was compared with the phase of active growth in summer. Rays from wood samples of poplar (Populus × canescens) were enriched by laser microdissection, and transcripts were monitored by poplar whole-genome microarrays. The resulting seasonally varying complex expression and metabolite patterns were subjected to pathway analyses. In February, the metabolic pathways related to flower induction were high, indicating that reactivation from dormancy was already taking place at this time of the year. In July, the pathways related to active growth, like lignin biosynthesis, nitrogen assimilation, and defense, were enriched. Based on “marker” genes identified in our pathway analyses, we were able to validate periodical changes in wood samples by quantitative polymerase chain reaction. These studies, and the resulting ray database, provide new insights into the steps underlying the seasonality of poplar trees."],["dc.identifier.doi","10.1104/pp.112.202291"],["dc.identifier.gro","3147741"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/5130"],["dc.language.iso","en"],["dc.notes.status","final"],["dc.notes.submitter","chake"],["dc.relation.issn","0032-0889"],["dc.title","Poplar Wood Rays Are Involved in Seasonal Remodeling of Tree Physiology"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dc.type.peerReviewed","no"],["dspace.entity.type","Publication"]]