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  • Drosophila melanogaster
  • Springer  (30)
  • American Meteorological Society
  • Blackwell Publishing Ltd
  • International Union of Crystallography
  • Springer Nature
  • 2015-2019
  • 1985-1989  (30)
  • 1975-1979
  • 1970-1974
  • 1960-1964
  • 1950-1954
  • 1989  (30)
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  • 2015-2019
  • 1985-1989  (30)
  • 1975-1979
  • 1970-1974
  • 1960-1964
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  • 1
    Digitale Medien
    Digitale Medien
    Rover/sitter foraging behavior inDrosophila melanogaster: Genetic localization to chromosome2L using compound autosomes (1989)
    Springer
    Journal of insect behavior 2 (1989), S. 291-299 
    Details
    ISSN: 1572-8889
    Schlagwort(e): larval behavior ; compound autosomes ; genetic mapping ; Drosophila melanogaster
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract Genetic control of the rover/sitter behavioral polymorphism in Drosophila melanogasterlarvae was localized to the left arm of chromosome 2.Ten independent left and right compound second chromosomes were generated in isogenic rover and sitter strains by gamma irradiation and substituted into 25 different lines. Comparisons were made between lines to determine the chromosome arm contributions to rover/sitter phenotype expression.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01068056
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Rover/sitterDrosophila melanogaster larval foraging polymorphism as a function of larval development, food-patch quality, and starvation (1989)
    Springer
    Journal of insect behavior 2 (1989), S. 301-313 
    Details
    ISSN: 1572-8889
    Schlagwort(e): Drosophila melanogaster ; larval foraging behavior ; genetics ; development ; plasticity ; patch quality
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract The genetically based rover/sitter behavioral difference in Drosophila melanogasterlarval foraging is expressed throughout most of the larval instars when larvae forage on food patches of differing food quality. The amount of locomotor behavior decreases when third-instar larvae of both rover and sitter strains are starved just prior to the behavioral test. Such strain differences in locomotor behavior are maintained despite the starvation-induced decrease in locomotion found in both strains. Measurements of larval body length and width, taken at 24, 48, 72, and 96 h posthatching, reveal that rover and sitter larval growth rates do not differ. The finding that rover/sitter differences are expressed in a variety of environments and throughout the majority of the larval instars should aid in attempts to uncover selection pressures which may differentially affect the two morphs in environmentally heterogeneous natural populations.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01068057
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Development of behavioral competence in youngDrosophila melanogaster adults (1989)
    Springer
    Journal of insect behavior 2 (1989), S. 575-588 
    Details
    ISSN: 1572-8889
    Schlagwort(e): aging ; behavior ; central nervous system ; Drosophila melanogaster ; Diptera
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Abstract We have monitored the ontogeny of several behaviors performed by young Drosophila melanogasteradults. Very young flies are less active than older flies and are less responsive to gravity, light, an odorant, and sucrose applied to their tarsi. In addition, very young males do not consume sucrose or perform any courtship behaviors in response to virgin females, which provide chemical and visual stimuli to courting males. The rate at which flies become maximally competent to respond to stimuli is a function of the behavior. Sensory and motor deficits are not solely responsible for young flies' inability to respond to the stimuli, which suggests that the central nervous system continues to develop after eclosion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01053355
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Microgeographic variation in aDrosophila melanogaster larval behavior (1989)
    Springer
    Journal of insect behavior 2 (1989), S. 829-834 
    Details
    ISSN: 1572-8889
    Schlagwort(e): Drosophila melanogaster ; larval behavior ; microhabitat ; heritability
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01049403
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Sexual isolation between Drosophila melanogaster females and D. simulans males: sexual maturation of males (1989)
    Springer
    Entomologia experimentalis et applicata 52 (1989), S. 159-166 
    Details
    ISSN: 1570-7458
    Schlagwort(e): Sexual isolation ; sexual maturation ; Drosophila melanogaster ; Drosophila simulans
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Beschreibung / Inhaltsverzeichnis: Résumé Des lignées isofemelles de D. simulans ont été examinées pour déterminer l'âge de la maturité sexuelle des mâles avec des femelles conspécifiques et pour établir la fréquence de l'hybridation avec des femelles de D. melanogaster. Les mâles ont commencé à être sexuellement mûrs le premier jour après l'émergence, mais leur aptitude à la copulation a augmenté lentement pendant le jour suivant. Les estimations, tant de l'âge du début de la maturation sexuelle que de l'âge du passage de mâle immature à mâle sexuellement mûr dépendaient étroitement des génotypes des femelles utilisées dans les expériences. Il n'y avait pas de différences nettes entre les lignées de mâles. Par contre, des différences dans les fréquences d'hybridation avec les femelles de D. melanogaster ont été observées. De ces résultats, on peut conclure que les différences dans la réussite des hybridations des lignées de mâles de D. simulans n'étaient pas dues à la vitesse de maturation sexuelle des mâles.
    Notizen: Abstract Isofemale lines of D. simulans were examined to determine the age of sexual maturity of males with conspecific females, and for the frequency of hybridization with D. melanogaster females. Males started to mature sexually on the first day after eclosion but their ability to mate slowly increased during the following day. The estimates of both the age sexual maturation started and the switch from immature to mature males were strongly dependent on the female genotypes used in the tests. No clear differences in speed of maturation were apparent between male lines. In contrast, differences in frequency of hybridization with D. melanogaster females did occur. From the above results it is concluded that the differential hybridization success of male D. simulans lines is not related to the speed at which males mature sexually.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00163250
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Drosophila melanogaster does not dealkylate [14C]sitosterol (1989)
    Springer
    Cellular and molecular life sciences 45 (1989), S. 983-985 
    Details
    ISSN: 1420-9071
    Schlagwort(e): Drosophila melanogaster ; sterol metabolism ; phytosterols ; dealkylation ; desmosterol ; sitosterol ; radiolabeled sterols
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Drosophila melanogaster was unable to dealkylate and convert [14C]sitosterol to cholesterol and no evidence was found for conversion of [14C]desmosterol to cholesterol. Therefore,D. melanogaster is incapable of dealkylating and converting C28 and C29 phytosterols to cholesterol.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01953056
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    20-Hydroxyecdysone induced aggregation of Drosophila S3 cells is inhibited by antibodies to a hormone-dependent extracellular glycoprotein (1989)
    Springer
    Development genes and evolution 198 (1989), S. 14-18 
    Details
    ISSN: 1432-041X
    Schlagwort(e): Drosophila melanogaster ; Cell lines ; 20-Hydroxyecdysone ; Extracellular glycoproteins
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The S3 cell line of Drosophila exhibits numerous responses to the molting hormone 20-hydroxyecdysone, including mitotic arrest, cell aggregation and extensive changes in cell surface and extracellular glycoproteins. We have produced polyclonal antibodies to a major hormone induced extracellular glycoprotein to investigate the role of this molecule in cell aggregation. This glycoprotein with a molecular weight of 110 kD (P110) is found primarily in the culture medium of hormone-induced cells. Upon reduction, the electrophoretic mobility of P110 is decreased, indicating the presence of internal disulfide bonds. Results from treatment of medium proteins with a cross-linking reagent indicate that the molecule is part of a higher molecular weight oligomer (300–400 kD). Fab fragments of anti P110 effectively inhibit the reaggregation of hormone-treated S3 cells, while preimmune Fab fragments have no effect. On the basis of these results, we propose that the P110 glycoprotein complex in the medium of hormone-treated cells functions in hormone-dependent cell-cell adhesion.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00376365
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Further analysis on the male-specific lethal mutations that affect dosage compensation in Drosophila melanogaster (1989)
    Springer
    Development genes and evolution 198 (1989), S. 34-38 
    Details
    ISSN: 1432-041X
    Schlagwort(e): Drosophila melanogaster ; Dosage compensation ; Male-specific lethal mutations
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary The male-specific lethal genes (msl) of D. melanogaster represent a set of genes whose functions are required for the specific X chromosome hypertranscription in males (dosage compensation). We have carried out the clonal analysis of one of those msl mutations: msl-3 b. Clones homozygous for msl-3 b are deleterious; this mutation presents cell autonomy and in the cases where msl clones appeared in sexually dimorphic regions (5th and 6th tergites) they do not show sexual transformation. Moreover, the lethal phase and the growth dynamics (measured by the protein content during larval growth) are the same for male larvae homozygous for one msl mutation (msl-1) or three msl mutations (msl-2 msl-1 mle), i.e. the msl mutations do not show additive effects. This paper considers the possible interactions between the msl genes that bring about dosage compensation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00376368
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Molecular structure of a naturally occurring alcohol dehydrogenase null activity allele inDrosophila melanogaster (1989)
    Springer
    Biochemical genetics 27 (1989), S. 679-688 
    Details
    ISSN: 1573-4927
    Schlagwort(e): alcohol dehydrogenase ; null allele ; DNA rearrangement ; Drosophila melanogaster
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract An alcohol dehydrogenase null activity allele,Adh nAH52 , extracted from a natural population ofDrosophila melanogaster has been cloned and sequenced. Compared with the wild-type consensus sequence, the nucleotide sequence ofAdh nAH52 contains eight extra bases in intron 2, adjacent to the 5' splice site. It seems likely that the extra bases result from two structural changes, with a 10-base pair insertion at the same site as a 2-base pair deletion. The insertion includes an 8-base pair duplication of an adjoining region. This structural change alters transcription to give rise to an mRNA which is longer than normal and at 10% of the wild-type level.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02396060
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Positive regulation of theDrosophila melanogaster G6PD gene by an insertion sequence (1989)
    Springer
    Biochemical genetics 27 (1989), S. 379-393 
    Details
    ISSN: 1573-4927
    Schlagwort(e): Drosophila melanogaster ; glucose-6-phosphate dehydrogenase (G6PD) ; transposable genetic element ; positive regulation ; chromatin structure
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Abstract In a previous study, we have shown that the three high-G6PD activity mutants are characterized by insertion of the Ins1 sequence consisting of a core sequence flanked by two defective P elements (KP and KP'; the 32nd base of the KP was replaced by guanine in the KP') in front of exonI of the G6PD gene and that the sequence responsible for positive regulation of the G6PD gene expression might be the core sequence but not the flanking KP and KP' elements. The core sequence is composed of either one or two identical units in each mutant. In this report we present evidence (1) that insertion of the Ins1 sequence gives rise to overproduction of G6PD mRNA, (2) that the length and the 5′ end of G6PD mRNA do not differ in wild-type and three mutants, (3) that the insertion site of the Ins1 sequence is the same in the mutants, and (4) that each unit of the core sequence has a pair of DNase I-hypersensitive sites. The possibility exists that the binding of some regulatory proteins to the DNase I-hypersensitive sites might accelerate the transcription rate of the G6PD gene.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00553905
    Standort Signatur Erwartet Verfügbarkeit
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