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  • Homoeologous recombination  (2)
  • IR spectroscopy  (2)
  • Springer  (4)
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  • Springer  (4)
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  • 1
    Electronic Resource
    Electronic Resource
    Mapping of the K+/Na+ discrimination locus Kna1 in wheat (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 448-454 
    Details
    ISSN: 1432-2242
    Keywords: Key words  Wheat ; Salt tolerance ; Homoeologous recombination ; QTL ; RFLP ; Genetic marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract   In saline environments, bread wheat, Triticum aestivum L. (genomes AABBDD), accumulates less Na+ and more K+ in expanding and young leaves than durum wheat, T. turgidum L. (genomes AABB). Higher K+/Na+ ratios in leaves of bread wheat correlate with its higher salt tolerance. Chromosome 4D from bread wheat was shown in previous work to play an important role in the control of this trait and was recombined with chromosome 4B in the absence of the Ph1 locus. A population of plants disomic for 4D/4B recombined chromosomes in the genetic background of T. turgidum was developed to investigate the genetic control of K+/Na+ discrimination by chromosome 4D. Evidence was obtained that the trait is controlled by a single locus, designated Kna1, in the long arm of chromosome 4D. In the present work, K+/Na+ discrimination was determined for additional families with 4D/4B chromosomes. The concentrations of Na+ and K+/Na+ ratios in the youngest leaf blades clustered in two nonoverlapping classes, and all recombinant families could be unequivocally assigned to Kna1 and kna1 classes. The Kna1 locus scored this way was mapped on a short region in the 4DL arm and was completely linked to Xwg199, Xabc305, Xbcd402, Xpsr567, and Xpsr375; it was also mapped as a quantitative trait. The results of the QTL analysis, based on the K+/Na+ ratios in the young leaves of greenhouse-grown plants and flag leaves of field-grown plants, agreed with the position of Kna1 determined as a qualitative trait. Several aspects of gene introgression by manipulation of the Ph1 locus are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001220050148
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  • 2
    Electronic Resource
    Electronic Resource
    Mapping of the K+/Na+ discrimination locus Kna1 in wheat (1996)
    Springer
    Theoretical and applied genetics 92 (1996), S. 448-454 
    Details
    ISSN: 1432-2242
    Keywords: Wheat ; Salt tolerance ; Homoeologous recombination ; QTL ; RFLP ; Genetic marker
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In saline environments, bread wheat, Triticum aestivum L. (genomes AABBDD), accumulates less Na+ and more K+ in expanding and young leaves than durum wheat, T. turgidum L. (genomes AABB). Higher K+/Na+ ratios in leaves of bread wheat correlate with its higher salt tolerance. Chromosome 4D from bread wheat was shown in previous work to play an important role in the control of this trait and was recombined with chromosome 4B in the absence of the Ph1 locus. A population of plants disomic for 4D/4B recombined chromosomes in the genetic background of T. turgidum was developed to investigate the genetic control of K+/Na+ discrimination by chromosome 4D. Evidence was obtained that the trait is controlled by a single locus, designated Kna1, in the long arm of chromosome 4D. In the present work, K+/Na+ discrimination was determined for additional families with 4D/4B chromosomes. The concentrations of Na+ and K+/Na+ ratios in the youngest leaf blades clustered in two nonoverlapping classes, and all recombinant families could be unequivocally assigned to Kna1 and kna1 classes. The Kna1 locus scored this way was mapped on a short region in the 4DL arm and was completely linked to Xwg199, Xabc305, Xbcd.402, Xpsr567, and Xpsr375; it was also mapped as a quantitative trait. The results of the QTL analysis, based on the K+/Na+ ratios in the young leaves of greenhousegrown plants and flag leaves of field-grown plants, agreed with the position of Knal determined as a qualitative trait. Several aspects of gene introgression by manipulation of the Ph1 locus are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223692
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  • 3
    Electronic Resource
    Electronic Resource
    The structure ofO-arylmercury derivatives of dihydroxy-9,10-anthraquinones and their reactions with anions (1996)
    Springer
    Russian chemical bulletin 45 (1996), S. 2784-2791 
    Details
    ISSN: 1573-9171
    Keywords: IR spectroscopy ; electron spectroscopy ; hydroxyanthraquinone derivatives
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The structure of mono- and di-O-arylmercury-derivatives of quinizarin (1,4-dihydroxy-9, 10-anthraquinone) and anthrarufin (1,5-dihydroxy-9, 10-anthraquinone) and their reactions with Br−, Cl−, OH−, andtBuO− anions in the solid state and in aprotic solvents were examined by vibrational and electron spectroscopy. These reactions result in cleavage of the O-Hg bond. The formation of ions or contact ion pairs depends on the size and nature of the counterion; quinizarin dianions give very strong ion pairs with K+ cations, which do not cleave in DMSO. The electronic structure of mono- and dianions of the compounds studied is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01430643
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  • 4
    Electronic Resource
    Electronic Resource
    Visualization of solid-state reactions of anisylmercury and triphenylphosphinegold derivatives of phthaleins with bromides (1993)
    Springer
    Russian chemical bulletin 42 (1993), S. 2028-2030 
    Details
    ISSN: 1573-9171
    Keywords: phthaleins ; electronic reflectance spectroscopy ; IR spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The visualization of solid-state reactions of bis-O-metallated phenolphthaleins and xylenolphthaleins (M=HgC6H4OMe, AuPPh3) with bromides, which has been discovered for the first time, was studied by IR and electronic reflectance spectroscopy. The appearance of intense coloration (purple, violet, or blue) after short-term grinding of colorless or faintly colored solid samples with salts is due to their ionization with the formation of ion pairs or dianions depending on the nature of the counterion. The reaction affects only a small fraction of the molecules in the surface layers of the metallocomplexes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00698891
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