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Reinhard Doll - One of the best experts on this subject based on the ideXlab platform.
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Neue Taraxacum‐Arten des Kaukasus
Feddes Repertorium, 2008Co-Authors: Reinhard DollAbstract:In der vorliegenden Arbeit werden vier Taraxacum-Sippen aus dem Kaukasus neu beschrieben: Sect. Scariosa: Taraxacum lenkoranense Doll sp. nov.; sect. Erythrocarpa: Taraxacum bakuense Doll sp. nov., Taraxacum scolopendriforme Doll sp. nov., Taraxacum shirakium Doll sp. nov. In the present work are described as new four Taraxacum taxa from the Caucasus: Sect. Scariosa: Taraxacum lenkoranense Doll sp. nov.; sect. Erythrocarpa: Taraxacum bakuense Doll. sp. nov., Taraxacum scolopendriforme Doll sp. nov., Taraxacum shirakium Doll sp. nov.
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Neue Taraxacum-Arten aus der UdSSR Mit 4 Tafeln
Feddes Repertorium, 2008Co-Authors: Reinhard DollAbstract:Es werden die folgenden vier neuen Taraxacum-Arten aus der UdSSR beschrieben und diskutiert: sect. Scariosa H.-M. emend. Dahlst.: Taraxacum ziwaschum Doll sp. nov.; sect. Macrocornuta v. Soest: Taraxacum pawlodarskum Doll sp. nov.; sect. Parvula H.-M. emend. v. Soest: Taraxacum ustamenum Doll sp. nov.; sect. Erythrocarpa (H.-M.) Dahlst. emend. v. Soest: Taraxacum pseudo-tianschanicum Doll sp. nov. The following four new Taraxacum-species from the USSR are described and discussed: sect. Scariosa H.-M. emend. Dahlst.: Taraxacum ziwaschum Doll sp. nov.; sect. Macrocornuta v. Soest: Taraxacum pawlodarskum Doll sp. nov.; sect. Parvula H.-M. emend. v. Soest: Taraxacum ustamenum Doll sp. nov.; sect. Erythrocarpa (H.-M.) Dahlst. emend. v. Soest: Taraxacum pseudo-tianschanicum Doll sp. nov.
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Zur Taraxacum-Flora der Mongolischen Volksrepublik
Feddes Repertorium, 2008Co-Authors: Reinhard DollAbstract:In der folgenden Arbeit werden 8 Taraxacum-Sippen aus der Mongolischen Volksrepublik vorgestellt. Von diesen sind zwei neu fur die Wissenschaft: Taraxacum bornuurense Doll sp. nov. und Taraxacum mongoliforme Doll sp. nov. In the following work are presented 8 Taraxacum-Taxa from the Mongolian people republic. From these are two new for the science: Taraxacum bornuurense Doll sp. nov. and Taraxacum mongoliforme Doll sp. nov.
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Neue Taraxacum‐Sippen aus dem Kaukasus
Feddes Repertorium, 2008Co-Authors: Reinhard DollAbstract:In der folgenden Arbeit werden 5 fur die Wissenschaft neue Taraxacum-Sippen aus der Armenischen SSR vorgestellt: sect. Ceratophora Dahlst.: Taraxacum glabratum Doll sp. nov., T. papposum Doll sp. nov.; sect. Erythrocarpa (H.-M.) Dahlst. emend. v. Soest: Taraxacum calocephaloides Doll sp. nov., T. pseudo-gracilens Doll sp. nov.; sect. Orientalia H.-M.: Taraxacum wardenium Doll sp. nov. Auserdem werden weitere Klein-Arten und Arten diskutiert. In the following work are presented 5 Taraxacum-Taxa as new for science from the Armenian SSR: sect. Ceratophora Dahlst.: Taraxacum glabratum Doll sp. nov., T. papposum Doll sp. nov.; sect. Erythrocarpa (H.-M.) Dahlst. emend. v. Soest: Taraxacum calocephaloides Doll sp. nov., T. pseudo-gracilens Doll sp. nov.; sect. Orientalia H.-M.; Taraxacum wardenium Doll sp. nov. Besides are discussed farther species and microspecies.
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Eine neue Art der Gattung Taraxacum aus Afghanistan
Feddes Repertorium, 2008Co-Authors: Reinhard DollAbstract:Im folgenden wird eine neue Art der Gattung Taraxacum beschrieben: Taraxacum pseudo-lobulatum Doll sp. nov. In this paper a new species of the genus Taraxacum is described: Taraxacum pseudo-lobulatum Doll sp. nov.
Rubar Hussein M Salih - One of the best experts on this subject based on the ideXlab platform.
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complete chloroplast genomes from apomictic Taraxacum asteraceae identity and variation between three microspecies
PLOS ONE, 2017Co-Authors: Rubar Hussein M Salih, ľubos Majeský, Trude Schwarzacher, Richard J Gornall, Pat HeslopharrisonAbstract:Chloroplast DNA sequences show substantial variation between higher plant species, and less variation within species, so are typically excellent markers to investigate evolutionary, population and genetic relationships and phylogenies. We sequenced the plastomes of Taraxacum obtusifrons Markl. (O978); T. stridulum Travnicek ined. (S3); and T. amplum Markl. (A978), three apomictic triploid (2n = 3x = 24) dandelions from the T. officinale agg. We aimed to characterize the variation in plastomes, define relationships and correlations with the apomictic microspecies status, and refine placement of the microspecies in the evolutionary or phylogenetic context of the Asteraceae. The chloroplast genomes of accessions O978 and S3 were identical and 151,322 bp long (where the nuclear genes are known to show variation), while A978 was 151,349 bp long. All three genomes contained 135 unique genes, with an additional copy of the trnF-GGA gene in the LSC region and 20 duplicated genes in the IR region, along with short repeats, the typical major Inverted Repeats (IR1 and IR2, 24,431bp long), and Large and Small Single Copy regions (LSC 83,889bp and SSC 18,571bp in O978). Between the two Taraxacum plastomes types, we identified 28 SNPs. The distribution of polymorphisms suggests some parts of the Taraxacum plastome are evolving at a slower rate. There was a hemi-nested inversion in the LSC region that is common to Asteraceae, and an SSC inversion from ndhF to rps15 found only in some Asteraceae lineages. A comparative repeat analysis showed variation between Taraxacum and the phylogenetically close genus Lactuca, with many more direct repeats of 40bp or more in Lactuca (1% larger plastome than Taraxacum). When individual genes and non-coding regions were for Asteraceae phylogeny reconstruction, not all showed the same evolutionary scenario suggesting care is needed for interpretation of relationships if a limited number of markers are used. Studying genotypic diversity in plastomes is important to characterize the nature of evolutionary processes in nuclear and cytoplasmic genomes with the different selection pressures, population structures and breeding systems.
Pat Heslopharrison - One of the best experts on this subject based on the ideXlab platform.
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complete chloroplast genomes from apomictic Taraxacum asteraceae identity and variation between three microspecies
PLOS ONE, 2017Co-Authors: Rubar Hussein M Salih, ľubos Majeský, Trude Schwarzacher, Richard J Gornall, Pat HeslopharrisonAbstract:Chloroplast DNA sequences show substantial variation between higher plant species, and less variation within species, so are typically excellent markers to investigate evolutionary, population and genetic relationships and phylogenies. We sequenced the plastomes of Taraxacum obtusifrons Markl. (O978); T. stridulum Travnicek ined. (S3); and T. amplum Markl. (A978), three apomictic triploid (2n = 3x = 24) dandelions from the T. officinale agg. We aimed to characterize the variation in plastomes, define relationships and correlations with the apomictic microspecies status, and refine placement of the microspecies in the evolutionary or phylogenetic context of the Asteraceae. The chloroplast genomes of accessions O978 and S3 were identical and 151,322 bp long (where the nuclear genes are known to show variation), while A978 was 151,349 bp long. All three genomes contained 135 unique genes, with an additional copy of the trnF-GGA gene in the LSC region and 20 duplicated genes in the IR region, along with short repeats, the typical major Inverted Repeats (IR1 and IR2, 24,431bp long), and Large and Small Single Copy regions (LSC 83,889bp and SSC 18,571bp in O978). Between the two Taraxacum plastomes types, we identified 28 SNPs. The distribution of polymorphisms suggests some parts of the Taraxacum plastome are evolving at a slower rate. There was a hemi-nested inversion in the LSC region that is common to Asteraceae, and an SSC inversion from ndhF to rps15 found only in some Asteraceae lineages. A comparative repeat analysis showed variation between Taraxacum and the phylogenetically close genus Lactuca, with many more direct repeats of 40bp or more in Lactuca (1% larger plastome than Taraxacum). When individual genes and non-coding regions were for Asteraceae phylogeny reconstruction, not all showed the same evolutionary scenario suggesting care is needed for interpretation of relationships if a limited number of markers are used. Studying genotypic diversity in plastomes is important to characterize the nature of evolutionary processes in nuclear and cytoplasmic genomes with the different selection pressures, population structures and breeding systems.
Bartosz J. Płachno - One of the best experts on this subject based on the ideXlab platform.
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Immunodetection of some pectic, arabinogalactan proteins and hemicellulose epitopes in the micropylar transmitting tissue of apomictic dandelions (Taraxacum, Asteraceae, Lactuceae)
Protoplasma, 2017Co-Authors: Robert Gawecki, Katarzyna Sala, Ewa U. Kurczyńska, Piotr Świątek, Bartosz J. PłachnoAbstract:In apomictic Taraxacum species, the development of both the embryo and the endosperm does not require double fertilisation. However, a structural reduction of ovular transmitting tissue was not observed in apomictic dandelions. The aim of this study was to analyse the chemical composition of the cell walls to describe the presence of arabinogalactan proteins (AGPs), hemicellulose and some pectic epitopes in the micropylar transmitting tissue of apomictic Taraxacum . The results point to (1) the similar distribution of AGPs in different developmental stages, (2) the absence of highly methyl-esterified homogalacturonan (HG) in transmitting tissue of ovule containing a mature embryo sac and the appearance of this pectin domain in the young seed containing the embryo and endosperm, (3) the similar pattern of low methyl-esterified pectin occurrence in both an ovule and a young seed with an embryo and endosperm in apomictic Taraxacum and (4) the presence of hemicelluloses recognised by LM25 and LM21 antibodies in the reproductive structure of Taraxacum .
Ge Xue - One of the best experts on this subject based on the ideXlab platform.
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NOTES ON THE GENUS Taraxacum F.H.WIGG. FROM THE DESERT REGION OF CHINA
Journal of Desert Research, 1998Co-Authors: Ge XueAbstract:There are only 9 species of Taraxacum F.H.Wigg.genus in 《Chinese Desert Flora》(Vol. 3). In the paper 12 species of the genus Taraxacum F.H.Wigg. from the desert region of China have been sorted out through specimen identification and textual research. Meanwhile, distribution and habitat of these species are reported.
