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  • Abscisic acid  (1)
  • Allozyme polymorphism  (1)
  • Degenerative disease  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Marchiafava-Bignami disease: serial changes in corpus callosum on MRI (1992)
    Springer
    Neuroradiology 34 (1992), S. 480-482 
    Details
    ISSN: 1432-1920
    Keywords: Degenerative disease ; Magnetic resonance imaging ; Corpus callosum ; Marchiafava-Bignami disease
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Serial MRI findings of changes in corpus callosum lesions in two cases of Marchiafava-Bignami disease are presented. In both, MRI displayed diffuse swelling of the corpus callosum in the acute stage, thought to represent oedema and demyelination. In the chronic stage, in addition to atrophy of the corpus callosum with presumed focal necrosis, previously undescribed focal hypointensity on T2-weighted images, of unknown cause, was observed in the corpus callosum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00598954
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Genetic diversity and multilocus associations in Cunninghamia lanceolata (Lamb.) Hook from The People's Republic of China (1994)
    Springer
    Theoretical and applied genetics 88 (1994), S. 465-471 
    Details
    ISSN: 1432-2242
    Keywords: Genetic structure ; Multilocus associations ; Allozyme polymorphism ; Cunninghamia lanceolata
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Open-pollinated seeds were assayed for allozyme polymorphisms at 24 loci to assess genetic diversity and multilocous associations in 16 populations of Cunninghamia lanceolata (Lamb.) Hook in the People's Republic of China. On average, the percentage of polymorphic loci was 88.0, the number of alleles per locus was 3.0, and the expected heterozygosity was 0.394. The distribution of genetic diversity was not correlated with the geographic and climatic variables of the populations. However, allele frequencies correlated linearly with the mean annual temperature of the populations at Mdh-1, Mdh-2, Mnr-2, Pgi-1, and Skdh-1 and with the altitude of the populations at Aph-4 and 6Pg-2. Of the total gene diversity 6% was attributed to among-population differentiation; 94% resided within populations. Two-locus gametic disequilibria were found in 15 of the 16 populations, and higher-order gametic disquilibria were significant in most populations. The gametic disequilibria did not correlate with geographic and climatic variables. The results suggest that population subdivision, founder effect, occurrence across diverse environments, a mating system dominated by inbreeding, and historical events from 2000 years of cultivation are contributing factors in the generation and maintenance of the multilocus genetic structure in this conifer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00223662
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Differential expression of two functional serine/threonine protein kinases from soyabean that have an unusual acidic domain at the carboxy terminus (1997)
    Springer
    Molecular genetics and genomics 255 (1997), S. 359-371 
    Details
    ISSN: 1617-4623
    Keywords: Key words Protein phosphorylation ; Osmotic stress Serine protein kinase ; Abscisic acid
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two soybean cDNA clones, SPK-3 and SPK-4, encoding putative protein kinases were isolated and characterized. Both cDNAs encoded approximately 40-kDa serine/threonine kinases with unusual stretches of acidic amino acids in their carboxy-terminal regions, which are highly homologous to PKABA1 from wheat and ASKs from Arabidopsis. These kinases are encoded by one- or two-copy genes in the soybean genome. Notably, SPK-3 and -4 showed different patterns of expression in various soybean tissues. SPK-3 is highly expressed in dividing and elongating tissues of young seedlings but relatively weakly in tissues of mature plants. In contrast, SPK-4 showed relatively high and constitutive expression in all the tissues examined except for leaf tissues of mature plants. Although various stressors, such as dehydration and high salinity, increased the expression of both genes, the induction kinetics were different. The two genes also differed in their response to abscisic acid (ABA). SPK-3 was induced but SPK-4 was not affected by exogenously supplied abscisic acid. In accordance with these expression data analysis of the activity of a chimeric SPK-3 promoter::β-glucuronidase (GUS) reporter gene by transient expression in tobacco leaves confirmed the inducibility of SPK-3 by salt and ABA. Polyclonal antibodies raised against a recombinant SPK-4 protein produced in Escherichia coli specifically recognized both recombinant SPK-3 and -4 proteins. Kinase assays using affinity-purified SPK-4/antibody complexes with crude soybean extracts as substrate identified specific phosphorylation of two 41 and 170 kDa soybean proteins that were phosphorylated on serine residues. Taken together, our results suggest that SPK-3, and/or SPK-4 are functional serine protein kinase(s). Furthermore, SPK-3 and -4 may play different roles in the transduction of various environmental stresses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004380050507
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
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