Schinkel, Christoph

[["dc.bibliographiccitation.firstpage","3318"],["dc.bibliographiccitation.issue","9"],["dc.bibliographiccitation.journal","International Journal of Molecular Sciences"],["dc.bibliographiccitation.volume","21"],["dc.contributor.affiliation","Schinkel, Christoph C. F.; \t\t \r\n\t\t Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, Untere Karspüle 2, 37073 Göttingen, Germany, christoph.cf.schinkel@gmail.com"],["dc.contributor.affiliation","Syngelaki, Eleni; \t\t \r\n\t\t Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, Untere Karspüle 2, 37073 Göttingen, Germany, eleni.syngelaki@uni-goettingen.de"],["dc.contributor.affiliation","Kirchheimer, Bernhard; \t\t \r\n\t\t Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Vienna, Austria, bernhard.kirchheimer@univie.ac.at"],["dc.contributor.affiliation","Dullinger, Stefan; \t\t \r\n\t\t Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, 1030 Vienna, Austria, stefan.dullinger@univie.ac.at"],["dc.contributor.affiliation","Klatt, Simone; \t\t \r\n\t\t Section Safety and Environmental Protection, University of Goettingen, Humboldtallee 15, 37073 Göttingen, Germany, simone.klatt@zvw.uni-goettingen.de"],["dc.contributor.affiliation","Hörandl, Elvira; \t\t \r\n\t\t Department of Systematics, Biodiversity and Evolution of Plants (with Herbarium), University of Goettingen, Untere Karspüle 2, 37073 Göttingen, Germany, ehoeran@gwdg.de"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Syngelaki, Eleni"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Dullinger, Stefan"],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2021-04-14T08:26:23Z"],["dc.date.available","2021-04-14T08:26:23Z"],["dc.date.issued","2020"],["dc.date.updated","2022-09-07T00:24:28Z"],["dc.description.sponsorship","Deutsche Forschungsgemeinschaft"],["dc.description.sponsorship","Austrian Science Fund"],["dc.identifier.doi","10.3390/ijms21093318"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17424"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/81927"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-399"],["dc.notes.intern","Merged from goescholar"],["dc.relation.eissn","1422-0067"],["dc.rights","Goescholar"],["dc.rights.uri","https://goescholar.uni-goettingen.de/licenses"],["dc.title","Epigenetic Patterns and Geographical Parthenogenesis in the Alpine Plant Species Ranunculus kuepferi (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.subtype","original_ja"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.artnumber","plw064"],["dc.bibliographiccitation.journal","AoB Plants"],["dc.bibliographiccitation.volume","8"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Dellinger, Agnes S."],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Winkler, Manuela"],["dc.contributor.author","Dullinger, Stefan"],["dc.contributor.author","Hoerandl, Elvira"],["dc.date.accessioned","2018-11-07T10:19:37Z"],["dc.date.available","2018-11-07T10:19:37Z"],["dc.date.issued","2016"],["dc.description.abstract","Apomictic plants expand their geographical distributions more to higher elevations compared to their sexual progenitors. It was so far unclear whether this tendency is related to mode of reproduction itself or represents a side effect of polyploidy. Apomixis is advantageous for range expansions as no mating partners and pollinators are needed (Baker's rule). Polyploidy is thought to infer fitness advantages and a higher vigour that would enable plants to adjust better to more extreme climatic conditions. However, little is known about actual performance of plants at higher elevations. We analyzed 81 populations of Ranunculus kuepferi from the whole distribution area in the European Alps to quantify apomictic versus sexual seed formation via flow cytometric seed screening. Seed set and vegetative growth were measured as fitness parameters. All parameters were correlated to geographical distribution, elevation, temperature and precipitation. Flow cytometric seed screening revealed predominantly obligate sexuality (88.9 %) and facultative apomixis in diploid populations, while tetraploid populations are predominantly facultative (65.4%) to obligate apomictic. Apomictic seed formation correlated significantly to higher elevations, which explains also the observed niche shift to lower temperatures. However, within the tetraploid range, there is no apparent correlation of degree of facultative apomixis to geographical distance. Apomixis appeared in diploids three times independently in separated, otherwise sexual populations in the southwestern refugial areas of the Alps. Diploid apomixis was not successful in range expansions, and obligate sexual polyploids were not observed. Polyploidy may relate to cold tolerance as an adaptation to conditions at high elevations, where diploid sexuals have no fitness advantage. Instead, facultative apomixis may have aided colonization of higher elevations and range expansions in the Alps without mate and pollinator limitation, but did not necessarily involve long-distance dispersal. A direct influence of low temperatures on unreduced gamete formation cannot be ruled out."],["dc.identifier.doi","10.1093/aobpla/plw064"],["dc.identifier.isi","000392970700001"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41704"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Oxford Univ Press"],["dc.relation.issn","2041-2851"],["dc.title","Correlations of polyploidy and apomixis with elevation and associated environmental gradients in an alpine plant"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.peerReviewed","yes"],["dc.type.status","published"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","716"],["dc.bibliographiccitation.issue","4"],["dc.bibliographiccitation.journal","Journal of Biogeography"],["dc.bibliographiccitation.lastpage","726"],["dc.bibliographiccitation.volume","43"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Dellinger, Agnes S."],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Moser, Dietmar"],["dc.contributor.author","Winkler, Manuela"],["dc.contributor.author","Lenoir, Jonathan"],["dc.contributor.author","Caccianiga, Marco"],["dc.contributor.author","Guisan, Antoine"],["dc.contributor.author","Nieto-Lugilde, Diego"],["dc.contributor.author","Svenning, Jens-Christian"],["dc.contributor.author","Thuiller, Wilfried"],["dc.contributor.author","Vittoz, Pascal"],["dc.contributor.author","Willner, Wolfgang"],["dc.contributor.author","Zimmermann, Niklaus E."],["dc.contributor.author","Hoerandl, Elvira"],["dc.contributor.author","Dullinger, Stefan"],["dc.date.accessioned","2018-11-07T10:16:26Z"],["dc.date.available","2018-11-07T10:16:26Z"],["dc.date.issued","2016"],["dc.description.abstract","AimEmerging polyploids may depend on environmental niche shifts for successful establishment. Using the alpine plant Ranunculus kuepferi as a model system, we explore the niche shift hypothesis at different spatial resolutions and in contrasting parts of the species range. LocationEuropean Alps. MethodsWe sampled 12 individuals from each of 102 populations of R. kuepferi across the Alps, determined their ploidy levels, derived coarse-grain (100x100m) environmental descriptors for all sampling sites by downscaling WorldClim maps, and calculated fine-scale environmental descriptors (2x2m) from indicator values of the vegetation accompanying the sampled individuals. Both coarse and fine-scale variables were further computed for 8239 vegetation plots from across the Alps. Subsequently, we compared niche optima and breadths of diploid and tetraploid cytotypes by combining principal components analysis and kernel smoothing procedures. Comparisons were done separately for coarse and fine-grain data sets and for sympatric, allopatric and the total set of populations. ResultsAll comparisons indicate that the niches of the two cytotypes differ in optima and/or breadths, but results vary in important details. The whole-range analysis suggests differentiation along the temperature gradient to be most important. However, sympatric comparisons indicate that this climatic shift was not a direct response to competition with diploid ancestors. Moreover, fine-grained analyses demonstrate niche contraction of tetraploids, especially in the sympatric range, that goes undetected with coarse-grained data. Main conclusionsAlthough the niche optima of the two cytotypes differ, separation along ecological gradients was probably less decisive for polyploid establishment than a shift towards facultative apomixis, a particularly effective strategy to avoid minority cytotype exclusion. In addition, our results suggest that coarse-grained analyses overestimate niche breadths of widely distributed taxa. Niche comparison analyses should hence be conducted at environmental data resolutions appropriate for the organism and question under study."],["dc.identifier.doi","10.1111/jbi.12663"],["dc.identifier.isi","000373154000007"],["dc.identifier.pmid","27482126"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/13234"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/41038"],["dc.notes.intern","Merged from goescholar"],["dc.notes.status","zu prüfen"],["dc.notes.submitter","Najko"],["dc.publisher","Wiley-blackwell"],["dc.relation.issn","1365-2699"],["dc.relation.issn","0305-0270"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","A matter of scale: apparent niche differentiation of diploid and tetraploid plants may depend on extent and grain of analysis"],["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","392"],["dc.bibliographiccitation.issue","3"],["dc.bibliographiccitation.journal","Ecology Letters"],["dc.bibliographiccitation.lastpage","401"],["dc.bibliographiccitation.volume","21"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Wessely, Johannes"],["dc.contributor.author","Gattringer, Andreas"],["dc.contributor.author","Hülber, Karl"],["dc.contributor.author","Moser, Dietmar"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Appelhans, Marc"],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Caccianiga, Marco"],["dc.contributor.author","Dellinger, Agnes"],["dc.contributor.author","Guisan, Antoine"],["dc.contributor.author","Kuttner, Michael"],["dc.contributor.author","Lenoir, Jonathan"],["dc.contributor.author","Maiorano, Luigi"],["dc.contributor.author","Nieto-Lugilde, Diego"],["dc.contributor.author","Plutzar, Christoph"],["dc.contributor.author","Svenning, Jens-Christian"],["dc.contributor.author","Willner, Wolfgang"],["dc.contributor.author","Hörandl, Elvira"],["dc.contributor.author","Dullinger, Stefan"],["dc.date.accessioned","2019-07-09T11:45:27Z"],["dc.date.available","2019-07-09T11:45:27Z"],["dc.date.issued","2018"],["dc.description.abstract","Asexual taxa often have larger ranges than their sexual progenitors, particularly in areas affected by Pleistocene glaciations. The reasons given for this 'geographical parthenogenesis' are contentious, with expansion of the ecological niche or colonisation advantages of uniparental reproduction assumed most important in case of plants. Here, we parameterized a spread model for the alpine buttercup Ranunculus kuepferi and reconstructed the joint Holocene range expansion of its sexual and apomictic cytotype across the European Alps under different simulation settings. We found that, rather than niche broadening or a higher migration rate, a shift of the apomict's niche towards colder conditions per se was crucial as it facilitated overcoming of topographical barriers, a factor likely relevant for many alpine apomicts. More generally, our simulations suggest potentially strong interacting effects of niche differentiation and reproductive modes on range formation of related sexual and asexual taxa arising from their differential sensitivity to minority cytotype disadvantage."],["dc.identifier.doi","10.1111/ele.12908"],["dc.identifier.pmid","29349850"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/15210"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59232"],["dc.language.iso","en"],["dc.notes.intern","Merged from goescholar"],["dc.relation","info:eu-repo/grantAgreement/EC/FP7/310886/EU//HISTFUNC"],["dc.relation.issn","1461-0248"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.subject.ddc","570"],["dc.title","Reconstructing geographical parthenogenesis: effects of niche differentiation and reproductive mode on Holocene range expansion of an alpine plant."],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dc.type.version","published_version"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.journal","Frontiers in Plant Science"],["dc.bibliographiccitation.volume","11"],["dc.contributor.author","Syngelaki, Eleni"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2020-12-10T18:46:50Z"],["dc.date.available","2020-12-10T18:46:50Z"],["dc.date.issued","2020"],["dc.description.abstract","The exposure to environmental stress can trigger epigenetic variation, which may have several evolutionary consequences. Polyploidy seems to affect the DNA methylation profiles. Nevertheless, it abides unclear whether temperature stress can induce methylations changes in different cytotypes and to what extent a treatment shift is translated to an epigenetic response. A suitable model system for studying these questions is Ranunculus kuepferi, an alpine perennial herb. Diploid and autotetraploid individuals of R. kuepferi were exposed to cold (+7°C day/+2°C night; frost treatment −1°C cold shocks for 3 nights per week) and warm (+15° day/+10°C night) conditions in climate growth chambers for two consecutive flowering periods and shifted from one condition to the other after the first flowering period. Methylation-sensitive amplified fragment-length polymorphism markers were applied for both years, to track down possible alterations induced by the stress treatments. Patterns of methylation suggested that cytotypes differed significantly in their profiles, independent from year of treatment. Likewise, the treatment shift had an impact on both cytotypes, resulting in significantly less epiloci, regardless the shift's direction. The AMOVAs revealed higher variation within than among treatments in diploids. In tetraploids, internally-methylated loci had a higher variation among than within treatments, as a response to temperature's change in both directions, and support the hypothesis of temperature stress affecting the epigenetic variation. Results suggest that the temperature-sensitivity of DNA methylation patterns shows a highly dynamic phenotypic plasticity in R. kuepferi, as both cytotypes responded to temperature shifts. Furthermore, ploidy level, even without effects of hybridization, has an important effect on epigenetic background variation, which may be correlated with the DNA methylation dynamics during cold acclimation."],["dc.identifier.doi","10.3389/fpls.2020.00435"],["dc.identifier.eissn","1664-462X"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/17389"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/78560"],["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","Effects of Temperature Treatments on Cytosine-Methylation Profiles of Diploid and Autotetraploid Plants of the Alpine Species Ranunculus kuepferi (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1093"],["dc.bibliographiccitation.issue","8"],["dc.bibliographiccitation.journal","Plant Systematics and Evolution"],["dc.bibliographiccitation.lastpage","1108"],["dc.bibliographiccitation.volume","303"],["dc.contributor.author","Schinkel, Christoph C. F."],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Dullinger, Stefan"],["dc.contributor.author","Geelen, Danny"],["dc.contributor.author","De Storme, Nico"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2019-07-09T11:44:26Z"],["dc.date.available","2019-07-09T11:44:26Z"],["dc.date.issued","2017"],["dc.description.abstract","Polyploidy is one of the most important evolutionary processes in plants. In natural populations, polyploids usually emerge from unreduced gametes which either fuse with reduced ones, resulting in triploid offspring (triploid bridge), or with other unreduced gametes, resulting in tetraploid embryos. The frequencies of these two pathways, and male versus female gamete contributions, however, are largely unexplored. Ranunculus kuepferi occurs with diploid, triploid and autotetraploid cytotypes in the Alps, whereby diploids are mostly sexual, while tetraploids are facultative apomicts. To test for the occurrence of polyploidization events by triploid bridge, we investigated 551 plants of natural populations via flow cytometric seed screening. We assessed ploidy shifts in the embryo to reconstruct female versus male gamete contributions to polyploid embryo and/or endosperm formation. Seed formation via unreduced egg cells (BIII hybrids) occurred in all three cytotypes, while only in one case both gametes were unreduced. Polyploids further formed seeds with reduced, unfertilized egg cells (polyhaploids and aneuploids). Pollen was highly variable in diameter, but only pollen >27 μm was viable, whereby diploids produced higher proportions of well-developed pollen. Pollen size was not informative for the formation of unreduced pollen. These results suggest that a female triploid bridge via unreduced egg cells is the major pathway toward polyploidization in R. kuepferi, maybe as a consequence of constraints of endosperm development. Triploids resulting from unreduced male gametes were not observed, which explains the lack of obligate sexual tetraploid individuals and populations. Unreduced egg cell formation in diploids represents the first step toward apomixis."],["dc.identifier.doi","10.1007/s00606-017-1435-6"],["dc.identifier.pmid","29081576"],["dc.identifier.purl","https://resolver.sub.uni-goettingen.de/purl?gs-1/14758"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/59011"],["dc.notes.intern","Merged from goescholar"],["dc.rights","CC BY 4.0"],["dc.rights.uri","https://creativecommons.org/licenses/by/4.0"],["dc.title","Pathways to polyploidy: indications of a female triploid bridge in the alpine species Ranunculus kuepferi (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","1287"],["dc.bibliographiccitation.issue","7"],["dc.bibliographiccitation.journal","Annals of Botany"],["dc.bibliographiccitation.lastpage","1298"],["dc.bibliographiccitation.volume","121"],["dc.contributor.author","Klatt, Simone"],["dc.contributor.author","Schinkel, Christoph C F"],["dc.contributor.author","Kirchheimer, Bernhard"],["dc.contributor.author","Dullinger, Stefan"],["dc.contributor.author","Hörandl, Elvira"],["dc.date.accessioned","2020-12-10T18:16:08Z"],["dc.date.available","2020-12-10T18:16:08Z"],["dc.date.issued","2018"],["dc.identifier.doi","10.1093/aob/mcy017"],["dc.identifier.eissn","1095-8290"],["dc.identifier.issn","0305-7364"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/75067"],["dc.language.iso","en"],["dc.notes.intern","DOI Import GROB-354"],["dc.title","Effects of cold treatments on fitness and mode of reproduction in the diploid and polyploid alpine plant Ranunculus kuepferi (Ranunculaceae)"],["dc.type","journal_article"],["dc.type.internalPublication","yes"],["dspace.entity.type","Publication"]]