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  • Angiosperms  (6)
  • Iron  (6)
  • Autoradiography  (4)
  • Lepidoptera  (4)
  • Springer  (20)
  • American Association for the Advancement of Science
  • Annual Reviews
  • Elsevier
  • Springer Science + Business Media
  • 1980-1984  (20)
  • 1981  (20)
Collection
Keywords
Publisher
  • Springer  (20)
  • American Association for the Advancement of Science
  • Annual Reviews
  • Elsevier
  • Springer Science + Business Media
Years
  • 1980-1984  (20)
Year
  • 1
    Electronic Resource
    Electronic Resource
    Repellency of pheromones released by females of Heliothis armigera and H. zea to females of both species (1981)
    Springer
    Entomologia experimentalis et applicata 30 (1981), S. 123-127 
    Details
    ISSN: 1570-7458
    Keywords: Sex Pheromones ; Repellent ; Heliothis armigera ; Heliothis zea ; Lepidoptera ; Noctuidae ; cotton bollworm ; corn earworm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Résumé L'examen en olfactomètre a porté sur les réactions face à d'autres femelles de la même espèce, de femelles vierges ou ayant copulé d'Heliothis armigera Hübner et H. zea Boddie. Le lot comprenait 8 femelles, vierges ou ayant copulé en présence d'une femelle vierge ou ayant copulé. Les 4 combinaisons possibles de femelles vierges et de femelles ayant copulé ont été examinées avec 12 répétitions pour chaque espèce. Un extrait de l'extrémité de l'abdomen de femelles vierges d'une espèce a été présenté aux femelles de l'autre espèce pour examiner les possibilités de réactions interspécifiques aux phéromones. Pour chaque espèce, les réactions interspécifiques de répulsion entre femelles ont été hautement significatives par rapport aux témoins, à l'exception toutefois des réactions de femelle ayant copulé face à des femelles ayant elles aussi copulé. Les répulsions moyennes chez H. armigera et H. zea pour les 8 femelles de chaque expérience ont été: a) vierges en présence d'une vierge: 7,33 et 7,66; b) vierges en présence d'une femelles ayant copulé: 5,76 et 5,58; c) femelles ayant copulé en présence d'une vierge: 4,67 et 4,83. Les différences sont hautement significatives entre chaque paire de moyennes et entre chaque paire et le lot témoin; 3,17; 3,17; 3,42; 4,00 pour H. armigera; 3,17; 3,50; 2,83 et 3,75 pour H. zea. Les femelles vierges des deux espèces, H. armigera et H. zea ont présenté une réaction de répulsion en présence d'un extrait de l'abdomen de l'autre espèce; les répulsions moyennes étant respectivement 5,53 et 5,33 contre 3,83 et 3,58 pour le lot trémoin. On peut en conclure que ces répulsions doivent entraîner une tendance à la répartition uniforme.
    Notes: Abstract An olfactometer was used to determine the effect of pheromones released by females of the bollworms Heliothis armigera (Hübner) and H. zea (Boddie) on females of the same species. Four combinations of virgin and mated females were tested for repellency of one to the other. Evidence is presented that females of the two bollworms were repelled by females of the same species. In addition, extracts of virgin female abdomens of each species repelled virgin females of the other species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00300876
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  • 2
    Electronic Resource
    Electronic Resource
    Microgeographic edaphic differentiation in allozyme polymorphisms of wild barley (Hordeum spontaneum, Poaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 287-292 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Poaceae ; Hordeum spontaneum ; Allozymes ; microgeographic differentiation ; population genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Allozymic variation in proteins encoded by 22 loci was analyzed electrophoretically in 278 individual plants of wild barley,Hordeum spontaneum, the progenitor of cultivated barley, in four 100 meter transects, in Israel, each equally subdivided into basalt and terra rossa soil types. Significant differentiation according to soil was found in 9 alleles. Our results suggest that allozyme polymorphisms in wild barley are at least partly adaptive, and differentiate by edaphic natural selection rather than by stochastic processes, and/or neutrality of allozymic variants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985193
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  • 3
    Electronic Resource
    Electronic Resource
    Proteoid root morphology and function inLupinus albus (1981)
    Springer
    Plant and soil 60 (1981), S. 143-147 
    Details
    ISSN: 1573-5036
    Keywords: Acidity ; Iron ; Lupinus albus ; Manganese reduction ; Proteoid roots ; Root exudates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Current theories of phosphorus uptake by plants imply that they can augment diffusion to their root axes by the development of abundant root hairs or mycorrhizas. Some phosphorus efficient plants have root morphology with multi-branched roots and localised regions of densely packed root hairs, which we suggest is better suited to the retention of substances exuded by the roots than uptake of substances moving to the root by diffusion. Evidence of substantial exudation by the proteoid roots ofLupinus albus is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02377120
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of calcium carbonate and organic matter on the growth and concentration of iron and manganese in sorghum (Sorghum bicolor) (1981)
    Springer
    Plant and soil 60 (1981), S. 295-300 
    Details
    ISSN: 1573-5036
    Keywords: Calcium carbonate ; Iron ; Manganese ; Organic matter ; Sorghum
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The effect of CaCO3 and organic matter on the availability of iron and manganese was studied on sorghum (Sorghum bicolor). Addition of calcium carbonate caused significant decrease in dry matter and grain yield. But yields tended to increase with the addition of organic matter at the rate of 15 t/ha. The iron concentration decreased with the addition of CaCO3 at all the stages of crop growth. Like iron, concentration of manganese also decreased with the increase in added CaCO3. Organic matter increased the iron concentration both at seedling and flowering stage. The concentration of manganese was, however, dependent on the stage of the crop.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02374113
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  • 5
    Electronic Resource
    Electronic Resource
    Histochemical, cytochemical and autoradiographic studies on the rostellum ofHymenolepis diminuta (1981)
    Springer
    Parasitology research 64 (1981), S. 335-345 
    Details
    ISSN: 1432-1955
    Keywords: Hymenolepis diminuta ; Autoradiography ; Ultracytochemistry ; Histochemistry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Histochemical studies on the rostellum ofHymenolepis diminuta revealed diastase-stable, protein/neutral carbohydrate-rich material localized in the rostellum tegument. The remainder of the rostellum, primarily composed of the glycogen-rich myocytons of the rostellum musculature, is protein-poor, but rich in diastase-labile, neutral and acidic carbohydrates. Ultrastructural cytochemical studies, using the periodic acid-thiocarbohydrazideosmium (PATCO) technique, indicated that the granules of the rostellar tegumental cytons and distal cytoplasm are carbohydrate-rich. Lipids are present in the rostellar myocytons but not in the tegumental cytons. Autoradiography using a pulse-labeling with [3H]leucine revealed an apical translocation of tegumental granules, but at a slower rate than had been reported for the strobilar tegument of the same organism. Neither [3H]galactose nor [3H]glucose were incorporated into the rostellar tegumental granules. The function of the secretory glycoprotein(s) produced in the rostellar tegument and its (their) possible role in the regulation of maturation and/or strobilization remain enigmatic.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00927380
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  • 6
    Electronic Resource
    Electronic Resource
    Synthesis of the intranuclear crystals in Scolopendrium vulgare (L.) SM (1981)
    Springer
    Planta 152 (1981), S. 137-144 
    Details
    ISSN: 1432-2048
    Keywords: Autoradiography ; Intranuclear crystals ; Nucleus, crystolo-Protein transfer-Pteridophytes ; Scolopendrium
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Proteinaceous intranuclear crystals are found in the fern Scolopendrium vulgare. During mitosis these crystals are eliminated from the nucleus into the cytoplasm, where they are dissolved. New crystals appear in the nucleus. The site of synthesis of intranuclear crystal proteins was investigated using quantitative ultrastructural autoradiography after incubation with tritiated lysine. The results suggest a migration of cytoplasmic proteins to the nucleus, part of which would then be incorporated into the intranuclear crystals.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00391185
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  • 7
    Electronic Resource
    Electronic Resource
    Embryology ofEriocaulon setaceum (Eriocaulaceae) (1981)
    Springer
    Plant systematics and evolution 138 (1981), S. 175-188 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Eriocaulaceae ; Eriocaulon setaceum ; Embryology ; systematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Eriocaulon setaceum can be characterized by: young microsporangium wall with epidermis, endothecium (with fibrous thickenings), and glandular tapetum (uninucleate cells); pollen grains 3-celled, spiraperturate; embryo sac development according to the Polygonum type and with antipodal cyst; endosperm nuclear; embryo small, with incipient differentiation into cotyledonary and epicotylary loci; seed coat mainly from the inner layers of the integuments; pericarp 2-layered and membranous. Embryologically, theEriocaulaceae are nearer to theXyridaceae than to otherFarinosae. Their elevation to the rank of an order,Eriocaulales, therefore appears justified.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00985181
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  • 8
    Electronic Resource
    Electronic Resource
    Genetic variation inSolanum pennellii: Comparisons with two other sympatric tomato species (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 11-45 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Solanaceae ; Lycopersicon ; Solanum pennellii ; Allozymes ; electrophoresis ; isozymes ; mating systems ; self-incompatibility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Genetic variation—primarily in 19 genetic loci of seven enzyme systems—was analyzed in accessions from various parts of the geographic range ofSolanum pennellii, which according to all tested biosystematic criteria behaves like a species ofLycopersicon. In comparison with the largely sympatricL. hirsutum andL. pimpinellifolium, this species exhibits the same trends of reduced allogamy and decreased genetic variation toward the north and south margins of its distribution, though to a much lesser degree; it does not exhibit their trends toward smaller flower size in the same peripheral regions. All three species agree to a considerable extent in the ranking of their tested loci in respect to degree of variablility; however, overall polymorphy is highest inS. pennellii. Except for the appearance of self-compatibility at its southernmost margin,S. pennellii is exclusively and rigidly self-incompatible. Alleles are distributed much more uniformly over the range than in the previously mentioned species, marginal and internal endemic mutants being much less abundant. A marked geographic disagreement is evident in regions of high and low variation. These differences in patterns of genetic variability are reconciled in terms of observed differences in mating systems, probable age of distributions, and adaptive strategies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983920
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  • 9
    Electronic Resource
    Electronic Resource
    Heterochromatin and chromosome variation in cultivated species ofTulipa subg.Eriostemones (Liliaceae) (1981)
    Springer
    Plant systematics and evolution 139 (1981), S. 47-55 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Tulipa subg.Liliaceae ; Eriostemones ; Giemsa banding ; heterochromatin ; karyosystematics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The chromosomes of several cultivatedTulipa species belonging to the subg.Eriostemones were examined using conventional staining and C-banding techniques. Most of the species have lightly banded chromosomes with heterochromatin content varying from nil to about 15%. The banding patterns of several taxa are described and discussed in regard to species relationships.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983921
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  • 10
    Electronic Resource
    Electronic Resource
    The evolutionary significance of multigermicity in the genusSpinacia (Chenopodiaceae) (1981)
    Springer
    Plant systematics and evolution 137 (1981), S. 57-61 
    Details
    ISSN: 1615-6110
    Keywords: Angiosperms ; Chenopodiaceae ; Spinacia ; S. turkestanica ; S. tetrandra ; Reproduction ; multigermicity ; seedball ; dioecy ; evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The presence of multigerm seedballs in the chenopodiacious genusSpinacia is noted. In the wild, colonising, and “weedy” dioecious species,S. turkestanica andS. tetrandra, the distribution of a multigerm seedball could effectively overcome the problem posed by isolation of the sexes. The hypothesis is tested assessing the extent of intra-seedball progeny hybridisations and seed production in the two wild species. The success in seed production by intra-seedball progeny crosses suggests that the distribution of such seedball progeny groups permits not only a percentage survival under isolation of these dioecious plants, but also the colonisation of areas outside that of the parent populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00983204
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