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  • Angiosperms  (306)
  • Humans
  • Springer  (308)
  • 1985-1989  (308)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    The compositional distribution of coding sequences and DNA molecules in humans and murids (1988)
    Springer
    Journal of molecular evolution 27 (1988), S. 311-320 
    Details
    ISSN: 1432-1432
    Keywords: Genome composition ; Coding sequences ; Isochores ; Humans ; Murids
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The compositional distributions of coding sequences and DNA molecules (in the 50-100-kb range) are remarkably narrower in murids (rat and mouse) compared to humans (as well as to all other mammals explored so far). In murids, both distributions begin at higher and end at lower GC values. A comparison of homologous coding sequences from murids and humans revealed that their different compositional distributions are due to differences in GC levels in all three codon positions, particularly of genes located at both ends of the distribution. In turn, these differences are responsible for differences in both codon usage and amino acids. When GC levels at first+second codon positions and third codon positions, respectively, of murid genes are plotted against corresponding GC levels of homologous human genes, linear relationships (with very high correlation coefficients and slopes of about 0.78 and 0.60, respectively) are found. This indicates a conservation of the order of GC levels in homologous genes from humans and murids. (The same comparison for mouse and rat genes indicates a conservation of GC levels of homologous genes.) A similar linear relationship was observed when plotting GC levels of corresponding DNA fractions (as obtained by density gradient centrifugation in the presence of a sequence-specific ligand) from mouse and human. These findings indicate that orderly compositional changes affecting not only coding sequences but also noncoding sequences took place since the divergence of murids. Such directional fixations of mutations point to the existence of selective pressures affecting the genome as a whole.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02101193
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  • 2
    Electronic Resource
    Electronic Resource
    Implementation of periodic acid-thiosemicarbazide-silver proteinate staining for ultrastructural assessment of muscle glycogen utilization during exercise (1985)
    Springer
    Cell & tissue research 242 (1985), S. 229-232 
    Details
    ISSN: 1432-0878
    Keywords: Skeletal muscles ; Ultrastructure ; Exercise ; Glycogen ; Humans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Distribution of glycogen particles in semithin and ultrathin sections of biopsy samples from human muscles subjected to either short- or long-term running were investigated using PAS and Periodic Acid-ThioSemiCarbazide-Silver Proteinate (PA-TSC-SP) staining methods. Glycogen particles were predominantly found immediately under the sarcolemma or aligned along the myofibrillar Iband. After long-term exhaustive exercise type-1 fibers with a few or no glycogen particles in the core of the fibers were frequently observed. The subsarcolemmal glycogen stores of these “depleted” type-1 fibers were about three times as large as after exhaustive short-time exercise. Another indication of utilization of subsarcolemmal glycogen stores during anaerobic exercise was that many particles displayed a pale, rudimentary shape. This observation suggests fragmental metabolization of glycogen. Thus, depending on type of exercise and type of fiber differential and sequential glycogen utilization patterns can be observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00225582
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  • 3
    Electronic Resource
    Electronic Resource
    Evolution and systematic relationships in theTriticeae (Poaceae) (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 1-28 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Systematics ; phylogeny ; cladistic ; phytogeography ; isozyme analyses ; chromosome pairing ; DNA analyses ; relationships ; molecular evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The evolution and taxonomic relationships in theTriticeae are discussed with the view to highlight aspects of this agronomically important group of plants, which may be of interest to molecular biology. Some of these aspects are addressed in more detail in adjoining papers in which specific genomic loci have been examined at the DNA sequence or isozyme level. Aspects discussed include the systematics and geographic distribution of theTriticeae species, isozyme and chromosome pairing studies on some of the species as well as more recent developments in DNA analyses. A survey of the systematics of theTriticeae indicated that the genomic system ofLöve is probably the most useful starting point for interpreting molecular data even though the system has many problems from a taxonomic point of view. The geographical distribution ofTriticeae species, using both published and unpublished data, suggested that information of this type taken together with the theory of continental drift provides a broad time-span for considering data from DNA sequence studies. The significance, and modes of analyses, of isozyme studies were assessed because they often provide valuable characters in determining relationships between species. The main character underlyingLöve's andDewey's analyses of theTriticeae, namely chromosome pairing, is discussed with particular reference to isozyme studies to show that in some cases, such as species ofHordeum sensu lato, consistent relationships are obtained. Finally, new developments in understanding chromosome structure are considered in relation to the above variables in the taxonomy and evolution of theTriticeae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936706
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  • 4
    Electronic Resource
    Electronic Resource
    Occurrence of rye (Secale cereale) 350-family DNA sequences inAgropyron and otherTriticeae (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 65-76 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Secale cereale ; Agropyron cristatum ; 350-family DNA sequences ; R and P genome ; in situ hybridization ; Nor-loci ; 5 S-DNA loci ; relationship ; chromosome pairing ; isozymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Evidence is presented that in the R and P genomes (Secale cereale andAgropyron cristatum, respectively) of theTriticeae there exist closely related 350-family DNA sequences in the terminal heterochromatin. This observation is compared to the relationships between these two genomes derived from a comparison of theNor and5 S DNA loci as well as the available data on morphological characters, chromosome pairing, and isozyme studies. It is concluded that the R and P genomes are not closely related and that the common presence of very similar 350-family DNA sequences reflects the parallel amplification of this family of DNA sequences.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936710
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  • 5
    Electronic Resource
    Electronic Resource
    DNA sequence analyses of the ribosomal spacer regions in theTriticeae (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 91-104 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Triticeae ; Ribosomal DNA spacer regions ; phenetic and molecular relationships
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two regions of the ribosomal DNA (rDNA) were sequenced from a range of species from the tribeTriticeae. One region, the central spacer, was found to be more divergent in sequence than the other, the 18 S-spacer junction. Both regions contained sequences 20–30 bp long which were more highly conserved than the remainder of the region and their possible significance in rDNA expression is discussed. Phenetic relationships based on the sequence data were generally consistent with the relationships based on other criteria. Species possessing the S, E, J1J2, D, and B genomes clustered together, with the H genome species being the most distinct of those examined. The R, P, and V genome species occupy an intermediate position in the overall pattern of relationships. Some relationships differed in detail from those established by other parameters, for example the position of the N genome species, and explanations for discrepancies of this type are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936712
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  • 6
    Electronic Resource
    Electronic Resource
    The flavonoids ofBalanites aegyptiaca (Balanitaceae) from Egypt (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 153-158 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Zygophyllaceae ; Balanitaceae ; Balanites aegyptiaca ; Chemosystematics ; quercetin and isorhamnetin glycosides
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Six flavonoid glycosides: quercetin 3-glucoside, quercetin-3-rutinoside; 3-glucoside, 3-rutinoside, 3-7-diglucoside and 3-rhamnogalactoside of isorhamnetin were extracted and identified from the leaves and branches of Egyptian material ofBalanites aegyptiaca. Only isorhamnetin: 3-rutinoside and 3-rhamnogalactoside were recorded from the fruits of the same plant.—Phytochemical aspects ofBalanites aegyptiaca and some genera ofZygophylaceae s. l. viz.Nitraria, Fagonia, Zygophyllum, Seetzenia andTribulus support its affinities with that family.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936042
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  • 7
    Electronic Resource
    Electronic Resource
    Putative genome donors ofArachis hypogaea (Fabaceae), evidence from crosses with synthetic amphidiploids (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 143-151 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Fabaceae ; Arachis hypogaea ; Amphidiploids ; chromosome pairing ; genome ; putative ancestors
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Chromosome pairing, pollen and pod fertility in hybrids between cultivated tetraploidArachis hypogaea and 15 synthetic amphidiploids from 8 diploid species (7 of the A genome and 1 of the B genome) of sect.Arachis have been utilized for the identification of putative genome donors in the evolution of cultivatedA. hypogaea. These results, in conjunction with evidence from morphological similarities, phytogeographical distribution and some phytochemical features, confirm the segmental amphidiploid origin ofA. hypogaea. A. batizocoi andA. duranensis are suggested as the donors of the B genome and the A genome respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936041
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  • 8
    Electronic Resource
    Electronic Resource
    Taxonomical investigations onHelleborus viridis s. l. (Ranunculaceae) in Northern Italy (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 181-188 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Ranunculaceae ; Helleborus viridis subsp.viridis and subsp.occidentalis ; H. odorus subsp.laxus. ; Range of distribution ; taxonomy ; Flora of Northern Italy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The taxon commonly namedHelleborus viridis in Lombardy (NW. Italy) differs from both, subsp.viridis and subsp.occidentalis, and is shown to fall within the variation range ofH. odorus subsp.laxus which has been reported so far for NE. Italy only. TrueH. viridis within Italy grows only in the Maritime Alps.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936045
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  • 9
    Electronic Resource
    Electronic Resource
    Typology of latex starch grains of certainEuphorbiaceae and their possible significance in systematics (1988)
    Springer
    Plant systematics and evolution 160 (1988), S. 189-193 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Euphorbiaceae ; Euphorbia ; Chamaesyce ; Latex starch grains ; phylogenetic and taxonomic implications
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Latex starch grains of certain Indian species ofEuphorbiaceae belonging toEuphorbia, Chamaesyce, Pedilanthus, Synadenium andMonadenium have been studied. They exhibit distinct shapes in different taxa, i.e., rod, spindle, osteoid, dumb-bell and discoid. This helps i.a. in the taxonomic circumscription ofChamaesyce fromEuphorbia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936046
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  • 10
    Electronic Resource
    Electronic Resource
    Germination behaviour in populations ofCapsella bursa-pastoris (Cruciferae) (1988)
    Springer
    Plant systematics and evolution 161 (1988), S. 35-47 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Cruciferae ; Capsella bursa-pastoris ; Adaptation ; germination behaviour in natural populations ; seed dormancy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Germination behaviour of variousCapsella bursa-pastoris populations collected from Scandinavia, Middle Europe and the Alps, was tested in unheated, non-illuminated greenhouses (46 populations) and in growth chambers using 5–7 alternating temperature regimes (16 populations). For all populations, the influence of temperature on germination rate is straightforward: the higher the temperature, the greater the germination. Germination capacity, however, may depend on the geographical region. There is also a strong seed age effect on both, rate and capacity of germination. Once dormancy was broken, seeds from all populations were able to germinate over the entire range of temperatures. Some populations revealed a more or less pronounced temperature optimum for germination capacity, others germinated equally well over the entire temperature range. This indicates genetic heterogeneity between populations. However, no correlation between germinability and any environmental pattern was detected. The data indicate thatCapsella bursa-pastoris has adopted a germination strategy which includes a broad temperature tolerance. Germination of wildCapsella plants seems to be regulated by the factors contributing to the inception and breaking of dormancy which depend on pre- and postharvest conditions. Adaptation in germination behaviour inCapsella bursa-pastoris is different from that in other life history traits (flowering behaviour, growth form parameters).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00936010
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