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1.

001-es BibID:BIBFORM023642
Első szerző:Bokor Katalin
Cím:Strains of Drosophila melanogaster differ in alcohol tolerance / Katalin Bokor, Katalin Pecsenye
Dátum:1997
Megjegyzések:The influence of environmental ethanol on different fitness components and the larval activities of some enzymes were studied in three strains of Drosoplzilu melunoguster. All three strains carried the Adli '-stGpdh♭ allele combination on their second chromosomes while they had unique allele combinations at the Odh and AIdox loci on their third chromosomes (strain 1: OdhS-Aldoxr; strain 2: Od/i♭-Aldos.'; strain 3: Odh~♭*-Aldo.u"). Normal lines and exposure lines, kept on 5 % ethanol supplemented medium for at least 20 generations, were established from each strain and the responses of the two lines to different ethanol concentrations were compared. Two survival components were estimated in the juvenile life history stages. In addition, the weights of the emerging adult males were measured at various concentrations of ethanol. The changes in the activities of two enzymes (ADH and rGPDH) were also surveyed in the larvae after the different ethanol treatments. Strain-specific differences were observed in the responses of all investigated traits to ethanol. Od/z"-Aldo.uF larvae seemed to be more tolerant to ethanol than the larvae of the other two strains while the utilisation of ethanol as energy source appeared to be the least effective in this strain. Larvae of the exposure lines had significantly higher tolerance to ethanol, and the adult males were heavier than the ones from thc normal lines. The enzymatic responses of the two lines to the ethanol treatments were also different. ADH activity, fresh male weight, and pupa-to-adult survival seemed only to be associated under short-term exposure to ethanol. Ethanol tolerance appeared to be independent of the utilisation of ethanol in the larva-to-pupa stage.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 126 : 2 (1997), p. 103-113. -
További szerzők:Pecsenye Katalin (1954-) (biológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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2.

001-es BibID:BIBFORM023989
Első szerző:Bokor Katalin
Cím:Differences in the effect of ethanol on fertility and viability components among laboratory strains of Drosophila melanogaster / Katalin Bokor, Katalin Pecsenye
Dátum:2000
ISSN:0018-0661
Megjegyzések:We studies the effect of ethanol on several fitness components in six Drosohila melanogaster strains. Mating success, fecundity, egg-to-larva, egy-to-pupa and egg-to-adult survival and the number of emerging adults were estimated in a single series of experiments. The strains either had different combinations of genetic background and Adh genotypes with identical OdhF genotype or different Adh-Odh two-locus genotypes with similar genetic background. Ethanol had the greatest effect on mating success and fecundity, while its influence was lower on survival. When the experimental conditions were contrasted to the natural environment of the flies the most significant results were the ones related to fecundity and larval survival. Ethanol had the highest selective effect on fecundity. The genetic factors contributed substantially to the variation in the fertility and viability components. The Adh locus hardly influenced mating success while it had a sizable effect on fecundity and on all survival components. The influence of Adh on fecundity greatly depended on the other genetic factors. Genetic background had the largest influence on the different survival components. The influence of the Odh locus was mostly observed trough the Adh-Odh interaction.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 132 : 3 (2000), p. 215-227. -
További szerzők:Pecsenye Katalin (1954-) (biológus)
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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3.

001-es BibID:bibEBI00008281
Első szerző:Meglécz Emese
Cím:Comparison of differentiation pattern at alloenzyme and microsatellite loci in Parnassius mnemosyne (Linnaeus, 1758) (Lepidoptera) populations / E. Meglécz, K. Pecsenye, Z. Varga, M. Solignac
Dátum:1998
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 128 : 2 (1998), p. 95-103. -
További szerzők:Pecsenye Katalin (1954-) (biológus) Varga Zoltán (1939-) (professor emeritus, evolúcióbiológus, zoológus) Solignac, M.
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4.

001-es BibID:BIBFORM046423
Első szerző:Pecsenye Katalin (biológus)
Cím:Linkage disequilibrium in Hungarian populations of Drosophila melanogaster / K. Pecsenye, B. Tóthmérész
Dátum:1994
ISSN:0018-0661
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas 121 : 3 (1994), p. 301-306. -
További szerzők:Tóthmérész Béla (1960-) (ökológus)
Internet cím:Szerző által megadott URL
DOI
Intézményi repozitóriumban (DEA) tárolt változat
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5.

001-es BibID:BIBFORM023667
Első szerző:Pecsenye Katalin (biológus)
Cím:The influence of the Odh-Aldox region of the third chromosome on the response of Drosophila melanogaster to environmental alcohol / K. Pecsenye, L. P. Lefkovitch, B. E. Giles and A. Saura
Dátum:1994
ISSN:0018-0661
Megjegyzések:Second instar larvae of Drosophila melanogaster were exposed to exogenous alcohol, which is known to influence the activities of several enzymes. In this study, the activity changes were followed in four enzymes (ADH, ODH, aGPDH and AOX) during ethanol exposure and compared in three inbred lines that had different allelic combinations at the Odh and Aldox loci. The results indicate that the Odh-Aldox region of the third chromosome may alter the general response to ethanol. The activity of ADH increased considerably in two strains in the larval stages in the presence of alcohol; nevertheless, strain 1, with the Odhs-AldoxF allelic combination, showed a delay in the ADH induction compared to strain 2, which had the OdhF-AldoxS combination. In strain 3 (OdhS*-AldoxS) larvae, ADH induction by environmental ethanol was not detected. Moreover, the activities of aGPDH and AOX in strains 2 and 3 were not affected by ethanol. In contrast, the activities of all four enzymes in strain I changed after exposure to ethanol.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 121 : 3 (1994), p. 237-248. -
További szerzők:Lefkovitch, L. P. Giles, B. E. Saura, Anssi
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
DOI
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6.

001-es BibID:BIBFORM023636
Első szerző:Pecsenye Katalin (biológus)
Cím:Detection of individual variation in enzyme activity in natural populations of Drosophila melanogaster / Katalin Pecsenye
Dátum:1998
Megjegyzések:of the given individual at these enzyme loci. Three isofemale lines were constructed which were monomorphic at several enzyme loci. Samples were prepared in two different ways: (i) individual samples - individuals were homogenised separately; (ii) collective samples ~ a common homogenate was prepared from several individuals. Oregon-R strain was also used to prepare a standard homogenate. The activities of alcohol dehydrogenase (ADH), cc-glycerophosphate dehydrogenase (aGPDH), isocitrate dehydrogenase (IDH), and 6-phosphogluconate dehydrogenase (6PGDH), were measured in each sample on starch gel after the proteins were separated by electrophoresis. Enzyme activities were assessed by the optical density of the bands. Gel and position weights were estimated on the basis of the statistical analyses of the activities measured in the standard samples. Gel weights were then used to account for the activity differences among the gels while position weights were applied to correct for the general tendencies in the activities observed within the gels. The gel and position weighted activities of individual and collective samples were compared in the isofemale lines. The individual samples had approximately two times as much variation as the collective samples for all four enzymes. The electrophoretic method is sensitive enough to study the structure of the phenotypic variation in enzyme activity in the natural populations. The total variation among the standard samples was close to the within subline component of variation obtained for the collective samples (measurement error). This shows that the standard samples can be used to estimate the size of the measurement error.
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 128 : 2 (1998), p. 145-151. -
Internet cím:Intézményi repozitóriumban (DEA) tárolt változat
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7.

001-es BibID:bibKLT00099855
Első szerző:Pecsenye Katalin (biológus)
Cím:Does Drosophila melanogaster use ethanol as an energy source during starvation? / K. Pecsenye, L. P. Lefkovitch, B. E. Giles and A. Saura
Dátum:1994
Tárgyszavak:Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:Hereditas. - 121 : 3 (1994), p. 225-236. -
További szerzők:Lefkovitch, L. P. Giles, B. E. Saura, Anssi
Borító:
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