Tränkner, Merle

[["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.journal","Journal of Agronomy and Crop Science"],["dc.contributor.author","Turcios, Ariel E."],["dc.contributor.author","Papenbrock, Jutta"],["dc.contributor.author","Tränkner, Merle"],["dc.date.accessioned","2021-04-14T08:30:04Z"],["dc.date.available","2021-04-14T08:30:04Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1111/jac.12477"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83089"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1439-037X"],["dc.relation.issn","0931-2250"],["dc.title","Potassium, an important element to improve water use efficiency and growth parameters in quinoa ( Chenopodium quinoa ) under saline conditions"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","10"],["dc.contributor.author","Hauer-Jákli, Melanie"],["dc.contributor.author","Tränkner, Merle"],["dc.date.accessioned","2020-12-10T18:44:39Z"],["dc.date.available","2020-12-10T18:44:39Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.3389/fpls.2019.00766"],["dc.identifier.eissn","1664-462X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78547"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Critical Leaf Magnesium Thresholds and the Impact of Magnesium on Plant Growth and Photo-Oxidative Defense: A Systematic Review and Meta-Analysis From 70 Years of Research"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1"],["dc.bibliographiccitation.journal","Journal of Plant Nutrition"],["dc.bibliographiccitation.lastpage","17"],["dc.contributor.author","Suriyagoda, Lalith"],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2022-02-01T10:31:17Z"],["dc.date.available","2022-02-01T10:31:17Z"],["dc.date.issued","2022"],["dc.identifier.doi","10.1080/01904167.2022.2027977"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/98820"],["dc.language.iso","en"],["dc.notes.intern","DOI-Import GROB-517"],["dc.relation.eissn","1532-4087"],["dc.relation.issn","0190-4167"],["dc.title","Growth and nutrition of rice seedlings when phosphorus or silicon was applied to a soil heavily contaminated with both arsenic and cadmium"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","682"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Plant Nutrition and Soil Science"],["dc.bibliographiccitation.lastpage","692"],["dc.bibliographiccitation.volume","178"],["dc.contributor.author","Senbayram, Mehmet"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Brueck, Holger"],["dc.date.accessioned","2018-11-07T09:53:55Z"],["dc.date.available","2018-11-07T09:53:55Z"],["dc.date.issued","2015"],["dc.description.abstract","The increasing probability of seasonal droughts and freshwater scarcity emphasizes the importance of crop traits such as water-use efficiency (WUE) and its relation to nutrient management. In an earlier study using soil substrate in a pot experiment, we reported significant positive effects of N supply on biomass WUE of tobacco. However, there was a debate that the latter may be due to indirect effects of N supply (hidden drought), most likely because plants supplied with adequate N generally have greater biomass and hence faster depletion of soil water in the root zone. In pot and in field situation, therefore, it is difficult to relate any variation in leaf or biomass WUE to the direct effect of N supply. In this context, the aim of the current study was to re-examine to what extent N fertilization directly affects biomass WUE and related parameters under non-limiting water supply in hydroponics. About 2 weeks after the transfer of tobacco seedlings into nutrient solution containing 2 mM N, plants were treated with high-N or low-N in the form of NH4NO3. A marked decrease in CO2 assimilation with low-N supply compared to high-N supply was measured already 5 d after onset of treatments (DAO). In contrast, three different experiments clearly showed that stomatal conductance (g(s)) remained almost constant until 5 DAO resulting in significantly lower leaf WUE under low-N compared to high-N. Leaf WUE decreased gradually (up to 42% lower leaf WUE) at later stages. Surprisingly, biomass WUE and whole-plant C-13 values were not affected by N supply at any harvest date, which is in contrast to our earlier report where we observed clearly positive effects of N supply on biomass WUE of the same tobacco variety in a pot experiment with soil substrate. Night-time respiration and transpiration rates (measured by gas exchange and thermal imaging) were significantly higher with high-N supply than with low-N supply. The data show that 48.6% and 9.8% of the beneficiary effect of N on daytime leaf WUE were lost when nocturnal stomatal conductance and night-time respiration of the same leaves were taken into consideration. Thus, we conclude that earlier reports showing positive effects of N supply on biomass WUE and C-13 values in soil or field experiments may be due to indirect effect of N supply (e.g., hidden/mild drought)."],["dc.identifier.doi","10.1002/jpln.201400608"],["dc.identifier.isi","000359062700016"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/36429"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1522-2624"],["dc.relation.issn","1436-8730"],["dc.title","Daytime leaf water use efficiency does not explain the relationship between plant N status and biomass water-use efficiency of tobacco under non-limiting water supply"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","2350"],["dc.bibliographiccitation.issue","15"],["dc.bibliographiccitation.journal","Journal of Plant Nutrition"],["dc.bibliographiccitation.lastpage","2367"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Suriyagoda, Lalith D. B."],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2021-04-14T08:25:36Z"],["dc.date.available","2021-04-14T08:25:36Z"],["dc.date.issued","2020"],["dc.identifier.doi","10.1080/01904167.2020.1771578"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81685"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.eissn","1532-4087"],["dc.relation.issn","0190-4167"],["dc.title","Effects of potassium nutrition and water availability on iron toxicity of rice seedlings"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["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"]]

[["dc.bibliographiccitation.firstpage","733"],["dc.bibliographiccitation.issue","6"],["dc.bibliographiccitation.journal","Journal of Plant Nutrition and Soil Science"],["dc.bibliographiccitation.lastpage","745"],["dc.bibliographiccitation.volume","179"],["dc.contributor.author","Jakli, Balint"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Senbayram, Mehmet"],["dc.contributor.author","Dittert, Klaus"],["dc.date.accessioned","2018-11-07T10:05:23Z"],["dc.date.available","2018-11-07T10:05:23Z"],["dc.date.issued","2016"],["dc.description.abstract","Enhancing crop water-use efficiency (WUE) is a major research objective in water-scarce agroecosystems. Potassium (K) enhances WUE and plays a crucial role in mitigating plant stress. Here, effects of K supply and PEG-induced water deficit on WUE of spring wheat (Triticum aestivum L. var. Sonett), grown in nutrient solution, were studied. Plants were treated with three levels of K supply (0.1, 1, 4 mM K+) and two levels of PEG (0, 25%). WUE was determined at leaf level (WUE L), at whole-plant level (WUEP), and via carbon isotope ratio (delta C-13). Effects of assimilation and stomatal conductance on WUE L were evaluated and compared with effects of biomass production and whole-plant transpiration (E-P) on WUEP. Adequate K supply enhanced WUEP up to 30% and by additional 20% under PEG stress, but had no effect on WUEL. E-P was lower with adequate K supply, but this effect may be attributed to canopy microclimate. Shoot delta C-13 responded linearly to time-integrated WUEL in adequately supplied plants, but not in K-deficient plants, indicating negative effects of K deficiency on mesophyll CO2 diffusion. It is concluded that leaf-scale evaluations of WUE are not reliable in predicting whole-plant WUE of crops such as spring wheat suffering K deficiency."],["dc.description.sponsorship","K+S KALI GmbH, Kassel, Germany"],["dc.identifier.doi","10.1002/jpln.201600340"],["dc.identifier.isi","000389031900006"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/38883"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-v C H Verlag Gmbh"],["dc.relation.issn","1522-2624"],["dc.relation.issn","1436-8730"],["dc.title","Adequate supply of potassium improves plant water-use efficiency but not leaf water-use efficiency of spring wheat"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","110751"],["dc.bibliographiccitation.journal","Plant Science"],["dc.bibliographiccitation.volume","302"],["dc.contributor.author","Jamali Jaghdani, Setareh"],["dc.contributor.author","Jahns, Peter"],["dc.contributor.author","Tränkner, Merle"],["dc.date.accessioned","2021-04-14T08:30:24Z"],["dc.date.available","2021-04-14T08:30:24Z"],["dc.date.issued","2021"],["dc.identifier.doi","10.1016/j.plantsci.2020.110751"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17875"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/83223"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.relation.issn","0168-9452"],["dc.rights.access","openAccess"],["dc.subject.ddc","630"],["dc.title","Mg deficiency induces photo-oxidative stress primarily by limiting CO2 assimilation and not by limiting photosynthetic light utilization"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]