Jákli, Bálint

[["dc.bibliographiccitation.firstpage","20"],["dc.bibliographiccitation.journal","Journal of Plant Physiology"],["dc.bibliographiccitation.lastpage","30"],["dc.bibliographiccitation.volume","209"],["dc.contributor.author","Jakli, Balint"],["dc.contributor.author","Tavakol, Ershad"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Senbayrama, Mehmet"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2018-11-07T10:27:55Z"],["dc.date.available","2018-11-07T10:27:55Z"],["dc.date.issued","2017"],["dc.description.abstract","Potassium (K) is crucial for crop growth and is strongly related to stress tolerance and water-use efficiency (WUE). A major physiological effect of K deficiency is the inhibition of net CO2 assimilation (AN) during photosynthesis. Whether this reduction originates from limitations either to photochemical energy conversion or biochemical CO2 fixation or from a limitation to CO2 diffusion through stomata and the leaf mesophyll is debated. In this study, limitations to photosynthetic carbon gain of sunflower (Helianthus annuus L.) under K deficiency and PEG-induced water deficit were quantified and their implications on plant-and leaf-scale WUE (WUEp, WUEL) were evaluated. Results show that neither maximum quantum use efficiency (F-v/F-m) nor in-vivo RubisCo activity were directly affected by K deficiency and that the observed impairment of A(N) was primarily due to decreased CO2 mesophyll conductance (g(m)). K deficiency additionally impaired leaf area development which, together with reduced A(N), resulted in inhibition of plant growth and a reduction of WUEp. Contrastingly, WUEL was not affected by K supply which indicated no inhibition of stomatal control. PEG-stress further impeded A(N) by stomatal closure and resulted in enhanced WUEL and high oxidative stress. It can be concluded from this study that reduction of g(m) is a major response of leaves to K deficiency, possibly due to changes in leaf anatomy, which negatively affects A(N) and contributes to the typical symptoms like oxidative stress, growth inhibition and reduced WUEp. (C) 2016 Elsevier GmbH. All rights reserved."],["dc.description.sponsorship","K+S KALI GmbH, Kassel, Germany"],["dc.identifier.doi","10.1016/j.jplph.2016.11.010"],["dc.identifier.isi","000395687400003"],["dc.identifier.pmid","28012363"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/43319"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","PUB_WoS_Import"],["dc.publisher","Elsevier Gmbh, Urban & Fischer Verlag"],["dc.relation.issn","1618-1328"],["dc.relation.issn","0176-1617"],["dc.title","Quantitative limitations to photosynthesis in K deficient sunflower and their implications on water-use efficiency"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","23"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","35"],["dc.bibliographiccitation.volume","430"],["dc.contributor.author","Tavakol, Ershad"],["dc.contributor.author","Jákli, Bálint"],["dc.contributor.author","Cakmak, Ismail"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Karlovsky, Petr"],["dc.contributor.author","Pfohl, Katharina"],["dc.contributor.author","Senbayram, Mehmet"],["dc.date.accessioned","2020-12-10T14:11:48Z"],["dc.date.available","2020-12-10T14:11:48Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1007/s11104-018-3704-8"],["dc.identifier.eissn","1573-5036"],["dc.identifier.issn","0032-079X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/71209"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Optimized potassium nutrition improves plant-water-relations of barley under PEG-induced osmotic stress"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","409"],["dc.bibliographiccitation.issue","1-2"],["dc.bibliographiccitation.journal","Plant and Soil"],["dc.bibliographiccitation.lastpage","423"],["dc.bibliographiccitation.volume","406"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Jakli, Balint"],["dc.contributor.author","Tavakol, Ershad"],["dc.contributor.author","Geilfus, Christoph-Martin"],["dc.contributor.author","Cakmak, Ismail"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Senbayram, Mehmet"],["dc.date.accessioned","2018-11-07T10:09:53Z"],["dc.date.available","2018-11-07T10:09:53Z"],["dc.date.issued","2016"],["dc.description.abstract","In water-scarce agro-environments a clear understanding of how plant nutrients like magnesium (Mg) affect plant traits related to water-use efficiency (WUE) is of great importance. Magnesium plays a crucial role in photosynthesis and is thus a major determinant of biomass formation. This study investigated the effect of Mg deficiency on leaf and whole plant water-use efficiency, delta C-13 composition, hydrogen peroxide (H2O2) production and the activity of key enzymes involved in ROS scavenging in barley. Barley (Hordeum vulgare) was grown in hydroponic culture under three different levels of Mg supply (0.01, 0.1, 0.4 mM Mg). WUE was determined on the leaf-level (leaf-WUE), the biomass-level (biomass-WUE) and via carbon isotope discrimination (delta C-13). Additionally, concentrations of Mg, chlorophyll and H2O2, and the activities of three antioxidative enzymes (ascorbate peroxidase, glutathione reductase and superoxide dismutase) in youngest fully expanded leaves were analyzed. Dry matter production was significantly decreased (by 34 % compared to control) in Mg deficient barley plants. Mg deficiency also markedly reduced leaf Mg concentrations and chlorophyll concentrations, but increased H2O2 concentrations (up to 55 % compared to control) and the activity of antioxidative enzymes. Severe Mg deficiency decreased biomass-WUE by 20 %, which was not reflected regarding leaf-WUE. In line with leaf-WUE data, discrimination against C-13 (indicating time-integrated WUE) was significantly reduced under Mg deficiency. Mg deficiency increased oxidative stress indicating impairment in carbon gain and decreased biomass-WUE. Our study suggests that biomass-WUE was not primarily affected by photosynthesis-related processes, but might be dependent on effects of Mg on night-time transpiration, respiration or root exudation."],["dc.identifier.doi","10.1007/s11104-016-2886-1"],["dc.identifier.isi","000381991600028"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13304"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/39741"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Springer"],["dc.relation.issn","1573-5036"],["dc.relation.issn","0032-079X"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Magnesium deficiency decreases biomass water-use efficiency and increases leaf water-use efficiency and oxidative stress in barley plants"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","414"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Acta Physiologiae Plantarum"],["dc.bibliographiccitation.lastpage","431"],["dc.bibliographiccitation.volume","163"],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Tavakol, Ershad"],["dc.contributor.author","Jákli, Bálint"],["dc.date.accessioned","2018-11-20T08:20:05Z"],["dc.date.available","2018-11-20T08:20:05Z"],["dc.date.issued","2018"],["dc.description.abstract","Potassium (K) and magnesium (Mg) are mineral nutrients that are required in large quantities by plants. Both elements critically contribute to the process of photosynthesis and the subsequent long-distance transport of photoassimilates. If K or Mg is not present in sufficient quantities in photosynthetic tissues, complex interactions of anatomical, physiological and biochemical responses result in a reduction of photosynthetic carbon assimilation. As a consequence, excessive production of reactive oxygen species causes photo-oxidation of the photosynthetic apparatus and causes an up-regulation of photoprotective mechanisms. In this article, we review the functioning of K and Mg in processes directly or indirectly associated with photosynthesis. Focus is given to chloroplast ultrastructure, light-dependent and -independent reactions of photosynthesis and the diffusion of CO2  - a major substrate for photosynthesis - into chloroplasts. We further emphasize their contribution to phloem-loading and long-distance transport of photoassimilates and to the photoprotection of the photosynthetic apparatus."],["dc.identifier.doi","10.1111/ppl.12747"],["dc.identifier.pmid","29667201"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/56843"],["dc.language.iso","en"],["dc.notes.status","zu prüfen"],["dc.relation.eissn","1399-3054"],["dc.title","Functioning of potassium and magnesium in photosynthesis, photosynthate translocation and photoprotection"],["dc.type","journal_article"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]