Tränkner, Merle

[["dc.bibliographiccitation.firstpage","234"],["dc.bibliographiccitation.journal","Plant Physiology and Biochemistry"],["dc.bibliographiccitation.lastpage","243"],["dc.bibliographiccitation.volume","144"],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Jamali Jaghdani, Setareh"],["dc.date.accessioned","2020-12-10T15:20:52Z"],["dc.date.available","2020-12-10T15:20:52Z"],["dc.date.issued","2019"],["dc.identifier.doi","10.1016/j.plaphy.2019.09.040"],["dc.identifier.issn","0981-9428"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/16919"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/72835"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY-NC-ND 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by-nc-nd/4.0"],["dc.title","Minimum magnesium concentrations for photosynthetic efficiency in wheat and sunflower seedlings"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","100040"],["dc.bibliographiccitation.journal","Plant Stress"],["dc.bibliographiccitation.volume","2"],["dc.contributor.author","Jamali Jaghdani, Setareh"],["dc.contributor.author","Jahns, Peter"],["dc.contributor.author","Tränkner, Merle"],["dc.date.accessioned","2021-11-16T14:59:07Z"],["dc.date.available","2021-11-16T14:59:07Z"],["dc.date.issued","2021"],["dc.description.abstract","Limited magnesium (Mg) supply adversely affects photosynthesis. This is particularly related to the high demand for Mg of key enzymes in the chloroplast, such as the photosystems, the ATP synthase and ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco). The accepted critical Mg concentrations for yield and dry matter (DM) are 1.5–3.5 mg Mg g−1 DM. Earlier studies on Mg deficiency indicated that carbon fixation by Rubisco is severely affected in various plant species, whereas the impact of Mg scarcity on light reactions and photoprotective mechanisms is quite variable. The latter could be related to species-specific differences in the general high light-sensitivity of photosynthetic light reactions. To test this hypothesis, we studied the impact of Mg deficiency in spinach (Spinacia oleracea) plants, which are known to be rather high light resistant. S. oleracea seeds were grown hydroponically under four Mg treatments (1 (control), 0.05, 0.025 and 0.015 mM) and the impact of Mg deficiency on CO2 assimilation, photosynthetic light reactions and photoprotection was determined. Our results show that the photosynthetic efficiency and the overall light stress response were not altered under Mg deficiency, whereas the CO2 assimilation as well as leaf and root Mg concentrations were significantly reduced."],["dc.identifier.doi","10.1016/j.stress.2021.100040"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17874"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/93057"],["dc.language.iso","en"],["dc.notes.intern","Migrated from goescholar"],["dc.relation.issn","2667-064X"],["dc.rights.access","openAccess"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.subject","Chlorophyll fluorescence, Crop nutrition, Mg, Photoprotection, Photosynthesis"],["dc.subject.ddc","630"],["dc.title","The impact of magnesium deficiency on photosynthesis and photoprotection in Spinacia oleracea"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["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.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Hou, Wenfeng"],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Lu, Jianwei"],["dc.contributor.author","Yan, Jinyao"],["dc.contributor.author","Huang, Siyuan"],["dc.contributor.author","Ren, Tao"],["dc.contributor.author","Cong, Rihuan"],["dc.contributor.author","Li, Xiaokun"],["dc.date.accessioned","2020-12-10T18:46:49Z"],["dc.date.available","2020-12-10T18:46:49Z"],["dc.date.issued","2020"],["dc.description.abstract","Evaluation of nitrogen (N) status by leaf color is a kind of classic nutritional diagnostic method. However, the color of leaves is influenced not only by N, but also by other nutrients such as potassium (K). Two-year field trials with a factorial combination of N and K were conducted to investigate the effects of different N and K rates on soil plant analysis development (SPAD) readings and leaf N, K, magnesium (Mg), and chlorophyll concentrations. Visual inspections in leaf greenness revealed darker green leaves with increasing N rates, while paler green leaves with increasing K rates. Data showed that SPAD readings, chlorophyll, N and Mg concentrations, and the chloroplast area increased significantly with raising N rates, while declined sharply with the increase in K rates due to the antagonistic relationships between K+ and NH4 + as well as Mg2+. It was also probable that the increase in K promoted the growth of leaves and diluted their N and Mg concentrations. The paler leaf appearance resulting from the application of K may overestimate the actual demand for N in the diagnosis of rice N status. The strong antagonistic relationships between K+, NH4 +, and Mg2+ should be considered in rice production and fertilization."],["dc.identifier.doi","10.3389/fpls.2020.00165"],["dc.identifier.eissn","1664-462X"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78557"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.publisher","Frontiers Media S.A."],["dc.relation.eissn","1664-462X"],["dc.rights","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Diagnosis of Nitrogen Nutrition in Rice Leaves Influenced by Potassium Levels"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","6031"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","International Journal of Molecular Sciences"],["dc.bibliographiccitation.lastpage","6045"],["dc.bibliographiccitation.volume","15"],["dc.contributor.author","Cabeza, Ricardo A."],["dc.contributor.author","Lingner, Annika"],["dc.contributor.author","Liese, Rebecca"],["dc.contributor.author","Sulieman, Saad"],["dc.contributor.author","Senbayram, Mehmet"],["dc.contributor.author","Traenkner, Merle"],["dc.contributor.author","Dittert, Klaus"],["dc.contributor.author","Schulze, Joachim"],["dc.date.accessioned","2018-11-07T09:41:34Z"],["dc.date.available","2018-11-07T09:41:34Z"],["dc.date.issued","2014"],["dc.description.abstract","Legumes match the nodule number to the N demand of the plant. When a mutation in the regulatory mechanism deprives the plant of that ability, an excessive number of nodules are formed. These mutants show low productivity in the fields, mainly due to the high carbon burden caused through the necessity to supply numerous nodules. The objective of this study was to clarify whether through optimal conditions for growth and CO2 assimilation a higher nodule activity of a supernodulating mutant of Medicago truncatula (M. truncatula) can be induced. Several experimental approaches reveal that under the conditions of our experiments, the nitrogen fixation of the supernodulating mutant, designated as sunn (super numeric nodules), was not limited by photosynthesis. Higher specific nitrogen fixation activity could not be induced through short-or long-term increases in CO2 assimilation around shoots. Furthermore, a whole plant P depletion induced a decline in nitrogen fixation, however this decline did not occur significantly earlier in sunn plants, nor was it more intense compared to the wild-type. However, a distinctly different pattern of nitrogen fixation during the day/night cycles of the experiment indicates that the control of N-2 fixing activity of the large number of nodules is an additional problem for the productivity of supernodulating mutants."],["dc.identifier.doi","10.3390/ijms15046031"],["dc.identifier.fs","608778"],["dc.identifier.isi","000336841200057"],["dc.identifier.pmid","24727372"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/11711"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/33763"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Mdpi Ag"],["dc.relation.issn","1422-0067"],["dc.rights.access","openAccess"],["dc.subject.mesh","Carbon Dioxide"],["dc.subject.mesh","Medicago truncatula"],["dc.subject.mesh","Nitrogen"],["dc.subject.mesh","Nitrogen Fixation"],["dc.subject.mesh","Phosphorus"],["dc.subject.mesh","Photosynthesis"],["dc.subject.mesh","Plant Shoots"],["dc.subject.mesh","Root Nodules, Plant"],["dc.title","The Activity of Nodules of the Supernodulating Mutant Mt(sunn) Is not Limited by Photosynthesis under Optimal Growth Conditions"],["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","235"],["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Nogueira Júnior, Antonio F."],["dc.contributor.author","Tränkner, Merle"],["dc.contributor.author","Ribeiro, Rafael V."],["dc.contributor.author","Tiedemann, Andreas von"],["dc.contributor.author","Amorim, Lilian"],["dc.date.accessioned","2020-04-29T12:31:18Z"],["dc.date.available","2020-04-29T12:31:18Z"],["dc.date.issued","2020"],["dc.description.abstract","Downy mildew caused by Plasmopara viticola is one of the most destructive diseases of Vitis vinifera worldwide. Grapevine breeding programs have introgressed P. viticola-resistant traits into cultivated V. vinifera genotypes and launched interspecific hybrids with resistance against downy mildew. In general, pathogen infection affects primary metabolism, reduces plant growth and development and modifies the secondary metabolism toward defense responses, which are costly in terms of carbon production and utilization. The objective of this work was to evaluate the photosynthesis impairment by inducible defenses at the leaf level in V. vinifera cultivars resistant to P. viticola. Photosynthetic limitations imposed by P. viticola in susceptible and resistant grapevine cultivars were evaluated. Histochemical localization of hydrogen peroxide and superoxide and the activity of ascorbate peroxidase were assessed. Measurements of leaf gas exchange, chlorophyll fluorescence and the response of leaf CO2 assimilation to increasing air CO2 concentrations were taken, and photosynthetic limitations determined in cultivars Solaris (resistant) and Riesling (susceptible). The net photosynthetic rates were reduced (-25%) in inoculated Solaris plants even before the appearance of cell death-like hypersensitive reactions (\"HR\"). One day after \"HR\" visualization, the net photosynthetic rate of Solaris was reduced by 57% compared with healthy plants. A similar pattern was noticed in resistant Cabernet Blanc and Phoenix plants. While the susceptible cultivars did not show any variation in leaf gas exchange before the appearance of visual symptoms, drastic reductions in net photosynthetic rate and stomatal conductance were found in diseased plants 12 days after inoculation. Decreases in the maximum Rubisco carboxylation rate and photochemical impairment were noticed in Riesling after inoculation with P. viticola, which were not found in Solaris. Damage to the photochemical reactions of photosynthesis was likely associated with the oxidative burst found in resistant cultivars within the first 24 h after inoculation. Both chlorophyll degradation and stomatal closure were also noticed in the incompatible interaction. Taken together, our data clearly revealed that the defense response against P. viticola causes a photosynthetic cost to grapevines, which is not reversible even 12 days after the pathogen infection."],["dc.identifier.doi","10.3389/fpls.2020.00235"],["dc.identifier.pmid","32265949"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17386"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/64473"],["dc.language.iso","en"],["dc.notes.intern","DeepGreen Import"],["dc.publisher","Frontiers Media S.A."],["dc.relation.eissn","1664-462X"],["dc.relation.issn","1664-462X"],["dc.rights","http://creativecommons.org/licenses/by/4.0/"],["dc.title","Photosynthetic Cost Associated With Induced Defense to Plasmopara viticola in Grapevine"],["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"]]