DRUŠTVO BIOLOGOV SLOVENIJE
Biological Society of Slovenia

 

 

Contents (Abstracts)

Volumes

11: 1 (1963)    40: 3-4 (1995)    42: 2 (1999)    43: 3 (2000)    44: 1-2 (2001)    45: 2 (2002)    46: 1 (2003)    47: 1 (2004)    47: 2 (2004)    48: 1 (2005)    48: 2 (2005)    49: 1 (2006)    49: 2 (2006)    50: 1 (2007)    50: 2 (2007)    51: 1 (2008)    51: 2 (2008)    52: 1 (2009)    52: 2 (2009)    53: 1 (2010)    53: 2 (2010)    54: 1 (2011)    54: 2 (2011)    55: 1 (2012)    55: 2 (2012)    56: 1 (2013)    56: 2 (2013)    57: 1 (2014)    57: 2 (2014)    58: 1 (2015)    58: 2 (2015)    59: 1 (2016)    59: 2 (2016)   

Contents: Volume 47, Nr. 2 (2004)


Tissue culture of pyrethrum ( Tanacetum cinerariifolium (Trevir.) Schultz Bip.)


Mateja GSPAN, Margareta VRTAČNIK, Jana AMBROŽIČ DOLINŠEK, Maja KOVAČ, Marjana CAMLOH, Jana ŽEL


Tissue culture of pyrethrum ( Tanacetum cinerariifolium (Trevir.) Schultz Bip.)


GSPAN Mateja, VRTAČNIK Margareta, AMBROŽIČ DOLINŠEK Jana, KOVAČ Maja, CAMLOH Marjana, ŽEL Jana

Abstract

Pyrethrum ( Tanacetum cinerariifolium ), is plant species with the highest amount of natural insecticides - pyrethrins. An in-house information system for the development of different plant tissue cultures and marketing of their products was designed. The application of the relational information system in setting up a research hypothesis of high probability is discussed. By processing the information system, plant tissue cultures' parameters were identified, selected and modified. They were tested on the plant tissue culture of Tanacetum cinerariifolium . The influence of jasmonic acid on axillary shoot differentiation was studied. An inhibitory effect of jasmonic acid on shoot tissue culture differentiation w as proven (100 μM, 10 μM), and a prediction method for determination of the variable optimal concentration interval was presented (between 0,5 and 4,5 μM). In addition a HPLC method was introduced for pyrethrins determination.

Keywords

Tanacetum cinerariifolium , pyrethrum, plant tissue culture, shoot tissue culture, axillary shoot, natural insecticides, pyrethrins, jasmonic acid, information system


UV-B radiation screen and respiratory potential in phytoplankton in mountain lakes


GERM Mateja

Abstract

UV-B radiation screen and the respiratory potential (terminal electron transport system – ETS activity) were investigated in phytoplankton from five mountain lakes located on an elevation gradient from 1383 m to 2150 m a.s.l.. The amount of UV absorbing compounds in phytoplankton was generally higher on the lakes from higher elevation. The increased ETS activity of phytoplankton in higher lakes was suggested to reflect the energetic cost of generating the internal mechanisms for photoprotection.

Keywords

mountain lakes, UV-B radiation, chlorophyll a , UV absorbing compounds, ETS activity, nutrient status


The phenotypic plasticity of Glyceria fluitans growing over the water/land gradient


KRŽIČ Nina, GABERŠČIK Alenka, GERM Mateja

Abstract

The amphibious species Glyceria fluitans successfully thrives in an intermittent ecosystem Lake Cerknica, where floods alternate with dry periods. The species grows over the environmental gradient from open water to dry land. The plant’s phenotypic plasticity was studied analysing anatomical, morphological, biochemical and physiological characteristics in specimens from different locations. Floating leaves were thicker, having abundant aerenchyma, lower chlorophyll a+b contents and higher chlorophyll a/b ratio. The relative amounts of total UV-B and UV-A screening compounds per leaf area were high and similar in all forms that indicated possibly saturated amounts. The measurement of fluorescence parameters revealed no disturbance in energy harvesting since the values of potential and effective photochemical efficiencies, photochemical and non-photochemical quenching were similar over the gradient.

Keywords

Glyceria fluitans , land/water gradient, amphibious character


Pollen grain bioassay for environmental contamination biomonitoring


PARADIŽ Jasna, LOVKA Milan

Abstract

Pollen grain bioassay near some highways was performed in 45 plant species for identification of environmental genotoxic impact on naturally growing plants due to environmental traffic contaminants. A relationship between the duration of heavy traffic on particular road sections and the degree of developmental and morphological changes of pollen grains was indicated. Increased frequency of pollen deformation after more than 20 years of traffic influence was established, indicating the applicability of pollen grain bioassay for genotoxic risk assessment of chronic low level contamination impact in natural habitats.

Keywords

naturally growing bioindicator plants, traffic contaminants, pollen grain deformation


Respiration rate and respiratory electron transport system (ETS) activity of chironomid larvae from mountain lakes (NW Slovenia)


SIMČIČ Tatjana

Abstract

Respiration rate (R) and electron transport system (ETS) activity were measured in larvae of four chironomid species, Chironomus thummi (Kieffer), Paratanytarsus austriacus (Kieffer), Procladius (Holotanypus) spp., and Zavrelimyia barbatipes (Kieffer) from three mountain lakes. ETS activity and respiration rate, measured at a standard temperature of 20 ºC, differed signi ficantly between species (ANOVA: p<0.001). ETS activity ranged from 10.3 µL O 2 mg -1 DW h -1 for Zavrelimyia to 27.6 µL O 2 mg -1 DW h -1 for Paratanytarsus . The lowest respiration rate was observed for Procladius (4.0 µL O 2 mg -1 DW h -1 ) and the highest for Paratanytarsus (12.4 µLO 2 mg -1 DW h -1 ). ETS activity and respiration rate of chironomids decreased with increasing size of the animals (p<0.001); b values for ETS activity and respiration rate were 0.82 and 0.66, respectively. Respiration rate correlated significantly with ETS activity for all four species investigated. This study revealed that the ETS/R ratio differed between species (ANOVA: p<0.001). A low ratio (0.98) was determined for Zavrelimyia , while Procladius showed the highest value (3.88). The differences can be explained by body size, and the ecological preference and tolerance of each chironomid species.

Keywords

Chironomidae, Diptera, benthos, ETS/R ratio, ETS activity, respiration, metabolism


Diversity of Butterfly Fauna (Lepidoptera: Rhopalocera) in the Škocjanske jame Regional Park


ČELIK Tatjana

Abstract

In 2001 and 2002 butterfly diversity were sampled in Škocjanske jame Regional Park, across 9 habitat types: dry grasslands, semi-dry grasslands, unmanaged dry grasslands (dry grasslands in the early successional stages), cultivated grasslands, abandoned fields, woodland margins, woodland paths, tracks and rides, screes and settlements. A total of 90 species of butterflies were recorded, which represent 50% of Slovenian butterfly fauna. All-European (33%), south-European (20%) and southeast-European (17%) species are prevailing. The butterfly fauna consists of grassland (56 spp.), seminemoral (16 spp.), nemoral (8 spp.) and ubiquitous (10 spp.) species. Among grassland species are 34 (39%) mesophilous and 22 (24%) xerothermophilous species. A total of 18 (20%) species are threatened at a European and a national level. Species composition of habitat type depends on floristic composition and structure of vegetation in habitat type, and landscape structure, which affects dispersal of butterfly species. The highest alfa diversity was found in dry grasslands (62 spp.) and unmanaged dry grasslands (60 spp.). The large proportions of specialist species and habitat heterogeneous area result in high values of beta diversity between habitat types and high gama diversity. For preserving the high species richness and threatened species in studied area, the most important habitat types are dry grasslands, semi-dry grasslands, unmanaged dry grasslands, woodland margins, woodland paths and screes.

Keywords

Škocjanske jame Regional Park, butterflies (Rhopalocera), distribution, faunal elements, species diversity, threatened species



TARMAN Kazimir, ŠTIRN Jože

 

© 2003, Društvo biologov Slovenije –
Journal of Biological Society of Slovenia

Zadnja sprememba:
15.3.2010