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1

The influence of recombinant human tumor necrosis factor [rh-TNFalpha] on granulocyte-macrophage progenitor cells [CFU-GM] and clonogenic leukaemic blasts [CFU-L] in cultures in vitro

100%
Robak T., Korycka A., Gora-Tybor J., Piotrowska-Wrzesien A., Krykowski E.
Archivum Immunologiae et Therapiae Experimentalis
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1992
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tom 40
|
nr 5-6
2

Differential responses to neutral red uptake of mating type I and mating type II cells in Paramecium primaurelia. II. Change in the macronuclear DNA content

100%
Delmonte Corrado M. U., Ramoino P., Margallo E.
Acta Protozoologica
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1992
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tom 31
|
nr 1
3

Population ecology and population genetics. Expectations and limitations

100%
Falinska K.
Seria Biologiczna. Uniwersytet im. Adama Mickiewicza w Poznaniu
|
2005
|
tom 72
4
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Contribution to the characteristic of Cladium mariscus [L.] Pohl population in the initial zone of floating mat on an oligo-humotrophic lake in North-Eastern Poland

84%
Namura-Ochalska A.
Acta Societatis Botanicorum Poloniae
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2005
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tom 74
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nr 2
In the initial phase of growth in an oligo-humotrophic lake, Cladium mariscus forms a dense and tall sawgrass bed invading the open water in the form of a floating mat. High densities of submerged evergreen perennial stems of C. mariscus, over two metres high and abundantly fruiting, ensure its persistence, and form a natural barrier to the invasion of other species. Dense mats of sawgrass are formed as a result of clonal and rhizome growth. Although diaspore production is abundant under natural conditions, only vegetative propagation of stems was observed. In different variants of the experiment only seeds wintering on stems of mother plants were capable of germinating. Hard seed coats had an important effect on the germination capacity of seeds.
5

On the ecology of Sorbus aucuparia [Rosaceae] with special regard to germination, establishment and growth

84%
Zerbe S.
Polish Botanical Journal
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2001
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tom 46
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nr 2
6

Genetic variation in Polish populations of Callitriche cophocarpa

67%
Buczkowska K., Szoszkiewicz K., Baczkiewicz A.
Acta Biologica Cracoviensia. Series Botanica
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2008
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tom 50
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nr 2
63-70
Callitriche cophocarpa Sendtn. is typically a submerged macrophyte, widespread throughout Poland. It is a monoecious plant with unisexual flowers which are produced only in the floating rosettes. We studied the allozyme variation of 9 populations of C. cophocarpa from Polish rivers in order to establish its genetic structure, mode of reproduction, clonal structure, and gene flow between populations. Genetic variation of the examined populations was low. Only 7 of the 12 loci studied were polymorphic. One of the 24 detected multilocus genotypes was widespread, found in 8 populations, and the remaining genotypes were rare. The mean percentage of polymorphic loci within populations was 19.44 and the mean number of alleles per locus was 1.231, with mean values of 0.0219 observed and 0.0421 expected heterozygosity. Fixation indices calculated for each population showed a significant deficit of heterozygotes. The study showed high differentiation between populations, with almost 50% of the total variation in C. cophocarpa located between populations. Allozyme studies showed a high contribution of clonal reproduction. The populations of C. cophocarpa are isolated from each another, and the existing physical barriers decrease the probability of gene flow between populations and cross-fertilization. Gene flow within rivers is more probable.
7
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Content available

Phenotypic responses to water flow and wave exposure in aquatic plants

67%
Szmeja J., Galka A.
Acta Societatis Botanicorum Poloniae
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2008
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tom 77
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nr 1
Plastic responses of 10 aquatic plant species from 5 rivers and 5 lakes in NW Poland were examined. Chara fragilis, C. delicatula, Potamogeton pectinatus, P. perfoliatus, P. natans, Spirodela polyrhiza, Hydrocharis morsus-ranae, Salvinia natans, Nymphoides peltata and Juncus bulbosus were the subject of research. In the running water of rivers, rhizophytes were generally bigger and they allocated from 0.6% to 58.6% more biomass for anchoring in the substrate than in stagnant water (ox bow lakes). In both flow variants rhizophytes allocated a similar biomass fraction for generative reproduction. On the other hand, under the influence of water flow pleustophytes reduced the mass of an individual (Spirodela by 25%, Hydrocharis 67%, Salvinia 77%) and emergent structures (p<0.001), and the number of sporangia (p<0.001). In both flow variants the input of biomass to generative reproduction was the same (Salvinia), or it was greater in running water (Hydrocharis; an increase from 4.9±1.3% to 15.1±3.6%). Under the conditions of strong wave action, in comparison with the lack of this environmental factor, Chara delicatula was several times shorter (p<0.001). However, it was also stouter, and as a result it had similar mass. In the areas of wave action the plant allocated 88.8% of its mass for anchoring in the substrate, whereas when there were no waves, only 22.7%.
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