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Fluoride has been implicated as a pathologic mediator of fluorosis. Interestingly neuronal destruction, synaptic injury occurs by a mechanism involving oxidative stress, however, its effects in developmental stages of life, during maternal fluoride exposure and amelioration are not elucidated. In the present study, pregnant Wistar albino rats were exposed to 50 and 150 ppm fluoride in drinking water...
The gametophyte of Argyroschosma nivea was studied, mainly focusing in its morphological development, and in the apogamous production of sporophytes. Some observations on the spores were also made. As far as it is known, this is the second species of the genus whose gametophytes are studied. The germination pattern followed the Vittaria type. The subsequent developmental processes followed the Ceratopteris...
N2-fixing cyanobacteria are unique in their capacity to form symbiotic associations with a wide range of eukaryotic hosts belonging to different plant groups. The present study was undertaken to analyze the interactions of the cyanobiont PI 01 (from Azolla pinnata) and Nostoc PCC 9229 (from Gunnera monoika) with wheat seedlings, in co-culturing experiments. Each of the cyanobionts enhanced significantly...
The mountain wetlands studied represent a unique habitat on the southern slopes of the Alborz mountain range, the second largest range in Iran. In comparison with other parts of this range the western section is ecologically and botanically unknown. Floristic and vegetation variation were assessed using diverse environmental variables along a broad altitudinal span (350 m to 3200 m a.s.l.). Using...
Huchen Hucho hucho from the Drina River (Serbia) revealed recently the decrease in breakpoint values for both standard length (Sl) and weight (w) in relation to the values recorded in 1999 from 110 cm to 98.4 cm and from 16.5 kg to 10.5 kg, respectively. That might indicate to the change in certain population parameters that could have an influence to the growth in the adult period of life.
In Slovenia not much is known about the European pond turtle (Emys orbicularis) and its habitat use. The purpose of this work was to determine age structure of the Draga pri Igu ponds population using the capture-mark-recapture method. For this purpose, we caught and marked 34 individuals and scored their age, gender and 12 morphometric characters. Turtles in the Draga pri Igu ponds became active...
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