Biology, Volume 745

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Contents

Braun S., Bruvere R., Zajakina A., Alekseeva E., Kozlovska T.
Subcellular localization of Hepatitis B virus core protein expressed from two different constructs in the Semliki Forest virus expression system 7

Jakobsone G.
Morphogenesis of wild orchid Dactylorhiza fuchsii in tissue culture 17

Andersone U., Ievinsh G.
Medium pH affects regeneration capacity and oxidative enzyme activity of Pinus sylvestris in tissue culture 25

Jakobsone G., Grants G.
The embryogenesis and development of newly obtained interspecific lily hybrids in vitro 37

Šuba J., Vintulis V., Pētersons G.
Late summer and autumn swarming of bats at Sikspārņu caves in Gauja National Park 43

Boiko D.
Territorial and temporal distribution of Whooper Swan Cygnus cygnus marked with neck collars in Latvia in 2003–2005 53

Purvina S., Béchemin C., Balode M., Grzebyk D., Maestrini S.Y.
The influence of inorganic nutrients and dissolved organic matter on the growth of cyanobacteria Microcystis aeruginosa isolated from the Gulf of Riga 61

Freivalds J., Rūmnieks J., Ose V., Renhofa R., Kazāks A.
High-level expression and purification of bacteriophage GA virus-like particles from yeast Saccharomyces cerevisiae and Pichia pastoris 75

Keiša A., Kānberga K., Gill U., Kleinhofs A., Rostoks N.
Cloning and characterization of barley homologues of the Arabidopsis LSD1 gene: putative regulators of hypersensitive response 87

Madžule L., Brūmelis G.
Ecology of epixylic bryophytes in Eurosiberian alder swamps of Latvia 103

Alekseeva E., Sominskaya I., Bruvere R., Ose V., Zajakina A., Kozlovska T.
Expression of Hepatitis C virus structural genes controlled by alphaviral recombinant replicons 115

Matisons R., Brūmelis G.
Effect of burial by sand on Scots pine (Pinus sylvestris L.) radial growth on seacoast wooded dunes at Cape Kolka, Latvia 131

Rūmnieks J., Freivalds J., Cielēns I., Renhofa R.
Specificity of packaging mRNAs in bacteriophage GA virus-like particles in yeast Saccharomyces cerevisiae 145

Druva-Lūsīte I., Karlsons A., Osvalde A., Ņečajeva J., Ievinsh G.
Photosynthetic performance and mycorrhizal symbiosis of a coastal marsh plant, Glaux maritima, in conditions of fluctuating soil salinity 155

Karlsons A., Osvalde A., Ņečajeva J., Ievinsh G.
Changes of nutritional status of coastal plants Aster tripolium and Hydrocotyle vulgaris at elevated soil salinity 165

Kļaviņa D., Ievinsh G.
Growth of tissue culture and changes in oxidative enzyme activity of Sorbus and tayberry cultivars during cold storage 179

Chipens G., Ieviņa N., Kalvinsh I.
An alternative model of the origin of genes: quantization of intron dimensions 187

Stalažs A., Šteffek J., Dreijers E.
Cepaea vindobonensis (C. Pfeiffer, 1828) in Latvia 199