Visnyk of Dnipropetrovsk University. Biology, ecology

3-9

Authors: V. B. Abdyev, N. A. Kasumov

The absorption of chlorine ions by barley roots from NaCl solution under the influence of ions similar in chemical properties to bromine was studied. It’s determined that chlorine and bromine ions are transported by the same carriers into plant cells, i.e. the influence of bromine ions is antagonistic.

16-21

Authors: K. V. Derkach, O. E. Abraimova, T. M. Satarova

The estimation of maize inbred lines of the Lancaster group for immature embryos response to cultivation in vitro was made. It was noted that ability to callusogenesis was genotypically determined and depended on the presence of the subplasm Oh43 lineage. It was established that frequency of morphogenic callusogenesis in sensitive to cultivation Lancaster group lines was at the level of 30–84 %. Promising maize inbreds cell and genetic engineering by an ability to produce morphogenic calli were identified.

31-35

Authors: Y. P. Zhytova, A. M. Yemets

Parthenitae and larvae of Prosthogonimus cuneatus Rudolphi, 1809 in the fresh water mollusk Bithynia tentaculata s were firstly found in the eastern Polissya (the Psel river bend, Sumy oblast). The paper presents the morphological characteristics of the P. cuneatus cercariae. Comparative analysis of the dimensional data of P. cuneatus sporocysts and larvae with their parthenitae and larvae described by T. A. Krasnolobova (1961), L. F. Filimonova and V. I. Shalyapina (1980), and E. Arystanov (1986) from B. tentaculata, B. inflata and B.caerulans mollusks was made.

41-50

Authors: O. S. Komarov, V. V. Brygadyrenko

The specific trophic preferences of Pterostichus oblongopunctatus (Fabricius, 1787) as one of the common litter zoophages in forests biogeocenoses of the south forest-steppe in the Poltava region are investigated. Taxonomic, size-weight and trophic structure of potential food objects offered to the P. oblongopunctatus was analysed. P. oblongopunctatus choice criteria of potential food objects were established: hardness of exoskeleton and size of prey and also victim’s ability for to fast moving.

65-74

Authors: O. N. Kunakh, A. A. Baldin

The obtained data revealed that soil mechanical resistance is an important factor affected many essential ecological properties of the biogeocoenosis. The soil layer’s mechanical resistance of 5MP is a limitation factor for the projective cover of herbaceous vegetation. If the 5MP mechanical resistance spreads to upper soil layer up, then the the grass cover decreases. The development of the plants projective cover affects the soil animals’ trophic activity and soil electrical conductivity. The expansion of the plant cover impacts on the capasity of dead plant horizon. The decrease of the projective plant cover favours the increase of the litter mass. The litter also influences the soil animals’ trophic activity and soil electrical conductivity.

81-88

Authors: O. Z. Melnikova, V. P. Lyashenko, G. A. Zadorozhna, T. G. Chaus, Y. N. Snezhkovskaya, Y. A. Luchka

he influence of long-lasting stress on rats’ heart rate variability, which reflects its regulation features, was estimated using electrocardiography data. The indices of correlation rhythmogram and variation pulsogram were analyzed in control and stressed animals. It was discovered that changes of studied indices depended on the duration of stress influence and could correspond to the different stages of stress-reaction of an organism.

101-112

Authors: S. N. Sannikov, I. V. Petrova, T. V. Filipрova, S. N. Sannikova, T. V. Parpan, E. V. Egorov

The analysis and synthesis of the data on allozyme structure, polymorphism and degree of genogeographic differentiation of mountain populations of Scots pine isolated in the Ukrainian Carpathians showed considerable genetic variability of foothill and mountain populations of Pinus sylvestris L., as well as the average genetic distance between these groups of populations. The differentiation between these groups of populations isolated by the ridges corresponds to the rank of geographic groups of populations. On the basis of our results there are sufficient grounds to separate the Carpathian mountain geographical race of Pinus sylvestris L. – var. carpatica Klika.

123-129

Authors: E. M. Tikhonova

Features of development of populations of weed species (Cirsium arvense (L.) Scop., Sonchus arvensis L., Melandium album (Mill.) Garke, Setaria glauca (L.) Beauv., Fallopia convolvulus (L.) А. Lоve) in most typical crops in the forest-steppe zone of the Sumy region. It was studied the crop sowings (winter wheat, rye, barley, buckwheat, pea) which was not subjected to the herbicide treatment.

137-142

Authors: А. S. Rossikhina, V. S. Bilchuk, V. V. Lashko, A. N. Vinnichenko

The influence of growth stimulators «Appin-extra», «Vympel» and «Agat» on the activity of aminotransferases inthe seedlings of early-mid ripening hybrids of maize has been studied. It has been established that growth-stimulating processing causes the rise of aspartat aminotransferaseand alaninaminotransferase activities and accumulation of easily soluble proteins at the early stages of growth. Against the background of clear tendency of the aminotransferases activities increase under the influence of growth-promoting factors the cultivar-specific reactions have been revealed. It has been registered the existence of a correlation (r = 0.88–0.99) between enzymatic activity of aminotransferases and growth stimulation in the maize seedlings.