Биологические науки. Рубрика в журнале - Бюллетень науки и практики
Статья научная
During 2013-2017 years biotic and abiotic of environmental conditions affecting to the extensiveness of invasion by causative agents of carp and trout parasitosis in fish farms in the territory of Azerbaijan Republic were studied. In addition, we studied the seasonal and age dynamics of diseases of the farm fishes. The prevalence of fish parasites infection in hot season (May-July) in comparison with cold month (October) was recorded. Twenty species of parasites from various systematical groups were found: protozoans (4 species); monogenean worms (3 species); cestodes (4 species); trematodes (3 species); nematodes (2 species); acanthocephalans (2 species); crustaceans (2 species). All investigations were conducted by considering of various factors affecting on production of fish. 386 specimens of carp and 415 specimens of trout were examined by the method of full parasitological dissection. We analyzed the physical and chemical conditions of water from the fish pools and other artificial basins in fish farms. In conclusion of our investigation the list of most pathogenic species of cultivated parasites were composed: Metechinorhyncnus truttae, Acanthocephalus clavulae, Paradilepis scolecina, Proteocephalus torulosus, Rhabdochon agnedini .
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Salvia modesta Boiss. (Lamiaceae) - новый вид для флоры Азербайджана
Статья научная
При проведении флористических, геоботанических и этноботанических исследований в окрестностях сел Кюлюс, Биченек (плато Батабат), Агбулаг Шахбузского района Нахичеванской Автономной Республики Азербайджана впервые выявлен новый для флоры Азербайджана вид Salvia modesta Boiss. - шалфей скромный. Изучены биоэкологические и фитоценологические особенности вида, а также определены координаты местоположения.
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Seed propagation of Juniperus foetidissima Willd. In Absheron
Статья научная
The bioecological characteristics of the genus Juniperus L. on the Absheron Peninsula and its resistance to environmental factors are considered. The juniper, which occupies a very important place in the forests of Azerbaijan, is less demanding on environmental factors. At the Institute of Dendrology of Azerbaijan NAS, research on seed reproduction was carried out. Despite the fact that seed propagation is the only way to create new hybrid forms, the structure of the seeds and the growth characteristics of conifers make it difficult to use this propagation method. In the presented work, the influence of various factors on seed reproduction is considered and a model for the complex application of stratification and scarification for seed germination is proposed.
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Статья научная
Enzymes of cellulase, hemicellulase, chitinase systems of local strains of mycelial and phytopathogenic, saprotrophic fungi isolated from various natural sources of the Republic of Uzbekistan were studied in a comparative aspect. According to the degree of hydrolysis of chitin and microcrystalline cellulose, added to the medium content as the only carbon source, and growth rate, 45 cultures were selected from the studied 151 representatives of microscopic fungi. Then 29 highly active cultures belonging to the genera Fusarium, Aspergillus, Penicillium, and also saprophytes Ulocladium, Alternaria were selected with deepening studies. Further among them, with the study of their action spectrum, 8 highly active cultures were collected. The activity of enzymes hydrolyzing natural polysaccharides (cellulose, chitin, xylan) was determined, as well as protein accumulation was observed in media containing chitin and microcrystalline cellulose as the sole source of carbon. It was shown that the activity of hydrolases (cellulases on the hydrolysis of cellulose-containing substrates - chitinase, xylanase) and the formation of protein depended on species affiliation of fungi, carbon sources in the culture medium and growth duration. The inhibitory effect of hydrolytically active culture fluids of fungi Penicillium sp. 18, Penicillium sp. 140 and Aspergillus terreus 461, Aspergillus terreus 499 on the phytopathogens Rhizoctonia solani, Verticillium dahliaе, Fusarium oxysporum and Fusarium solani was defined. Selected fungi with high hydrolytic activity are the basis for the creation of highly effective ecologically safe biopreparations of microbial origin for protecting plants from phytopathogens and new biotechnologies in the field of crop cultivation, bioconversion of plant and industrial waste, environmental protection.
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Статья научная
The article deals with changes in situational excitemen level of the examination process in I and IV courses depending on the temperament of the nervous system. The research was conducted 2 months before the exam, 30 minutes before the exam and 30 minutes after the exam. Before starting the study, the temperament types of the nervous system of young people were studied. Situational anxiety of young people of different temperament types (emotional stress) was determined by a score system in three different situations: on normal days, before the exam and after the exam. The situational alarm was determined by an express version of the test questionnaire according to the Spielberg. It was found that at all stages, first- and fourth-year students had an insignificant difference between the types in situational excitemen level. Also, the difference between groups was not statistically reliable. In addition, the indicators of phlegmatic, choleric and sanguine types of situational excitemen level in the 4th year students changed statistically reliable in comparison with normal days. At the same age, the phlegmatic and sanguine types of situational excitemen level in after the exam were statistically reliable compared to normal days. In the IV course traps, the indicators of the phlegmatic type are statistically reliable in comparison with before the exam and after the exam situational excitemen level.
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Статья научная
Coleoptera occupies a special place in the class of insects that annually cause great damage to agricultural plants. Of particular agricultural importance among these pests is the shaggy bronze, belonging to the family of Scarabaeidae. The damage caused by this pest to the stone fruit trees of the Sheki-Zagatala zone, the dynamics of development in horticulture, periods of activity in agrocenoses and phenological calendars have not been studied in detail. The article reflects the results of research on the ecology of the shaggy bronze. The study of bioecological and phenological characteristics of stone fruit pests in the Sheki-Zagatala zone was carried out on stationary fields in 2017-2021. The material was collected in agrocenoses and biocenoses during the year. The collection and identification of species, the conduct of experiments, and the mathematical processing of the results were carried out by methods generally accepted in entomology. As a result, it was established that the shaggy bronze develops in one generation in the Sheki-Zagatala zone. Pests go into diapause during the pupation period. Although the seasonal dynamics of the flight of the shaggy bronze is a curve with one peak, the daily dynamics of flight is a curve with two peaks. In spring, there is a one-peak curve, and in summer, a two-peak curve, depending on the weather temperature. The results of the research can be taken into account in the development of integrated pest control measures.
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Some fish species of fishery importance in Nakhchivan part of Aras reservoir
Статья научная
The study is dedicated to the identification of fish species that have fishery importance and distributed over the Nakhichevan part of Aras water reservoir. The study was conducted between 2018 and 2021. Samples were collected by means of nets, strainers and fishing rods. Materials (samples) captured by Nakhchivan Fish Farm were also used during the study. 14 fish species with fishery importance were identified in the study area: Acipenser stellatus stellatus n. cyrensis, Rutilus rutilus subsp. caspicus, Ctenopharyngodon idella, Aspius aspius subsp. taeniatus, Luciobarbus capito, Barbus lacerta subsp. cyri, Blicca bjoerkna subsp. transcaucasica, Abramis brama subsp. orientalis, Cyprinus carpio, Hypophthalmichthys molitrix, Carassius auratus subsp. gibelio, Capoeta sevangi, Silurus glanis and Sander lucioperca. The article provides detailed information on 6 species with fishery importance (Aspius aspius subsp. taeniatus, Blicca bjoerkna subsp. transcaucasica, Abramis brama subsp. orientalis, Carassius auratus subsp. gibelio, Cyprinus carpio, Silurus glanis) that bear essential significance for Nakhchivan territory.
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Spring flora of the northeast part of the Lesser Caucasus and its classification
Статья научная
The article discusses the geobotanical classification of some species of spring flora formed in the north-eastern region of the Lesser Caucasus in Azerbaijan, vegetation types, phytocenosis and the composition of the flora, morphological structure and distribution of associations. The spring vegetation of the study area is relatively poorly studied. As a result of the research, it was found that the spring flora is dominated by annual and perennial grasses. Also, in order to determine the geographical structure of the species during the research, a comparative analysis of the geographical elements, including the habitat types of the species, was conducted.
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Stages of phenological development of the Magnolia L. some species in Absheron
Статья научная
The article analyzes the stages of phenological development of 3 species of the genus Magnolia L. In the research work, the biology of leafing, budding, flowering, fruit-bearing of some species belonging to the genus Magnolia in Absheron conditions was studied on a scientific basis. The vegetation period of the species we studied was studied and climatic factors that positively or negatively affected this period were studied. The studied species were divided into groups according to the onset of flowering and the duration of this period. Thus, the entry and duration of Magnolia L. species in the Absheron region depends on the meteorological and climatic factors of the region where they are introduced, especially the air temperature and relative humidity.
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Статья научная
As a result of analysis of the literature data and our research, for the first-time distribution of the species Artemisia abrotanum L., A. maritima L., A. pauciflora Weber, A. issaevii Rzazade in different regions of Azerbaijan by obtaining bioactive compounds typical for them is confirmed in the article in detail. Distribution, resources, ecological features, as well as useful properties of wormwood ( Artemisia L.) species found in the flora of Azerbaijan were studied by us, their possibilities of use in various fields of folk and agriculture were recommended. General distribution areas, biological and ecological features of all species were studied. Essential oil was obtained using the Ginsberg hydrodistillation method and component content was determined by the method of Gas Chromato-Mass Spectroscopy. Gas Chromato-Mass Spectroscopy was performed using Agilent 5977A MS gas chromatography and Agilent 7890 GC inert Mass Selector Detector. A. abrotanum L., which is new for the flora of Azerbaijan, two new substances, steroids (β-sitosterol St-1, stigmasterol St-1) was obtained from A. maritima L . species three substances, α-santonin, artemisin, glabellin was obtained. In the composition of the aerial part of the species A. pauciflora Web., 60 terpenoid compounds were identified, 17 components were detected by mass spectroscopy.
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Статья научная
The results of the study of the relative water content (RWC) and photosynthetic gas exchange parameters of the flag leaves in 21 soft wheat genotypes under rainfed conditions of Mountain Shirvan have been presented in the paper. The research was performed with drought-exposed and irrigated variants during the grain filling phase. RWC of the flag leaves of Vostorg, Murov 2, Tale 38, and Gyrmyzy gul 1 genotypes was higher both under drought and irrigated conditions. There was a positive correlation between RWC and earing time, and a negative correlation between RWC and plant height. The average difference in RWC between irrigated and drought-exposed variants for all genotypes was 10.1%. In 12thIWWYT no. 9 and 12thIWWYT no. 20 lines, this difference was high (26.5 and 19.6%), while in Gyzyl bughda, Murov 2, and Ferrigineum 2/19 genotypes, it was low (3.5, 3.6, and 2.9%). The highest values of the rate of photosynthesis were observed in the drought-exposed genotypes Sheki 1, Aran, Tale 38, and Zirva 85 (14.2, 14.8, 14.1, and 14.3 µmol CO2 m-2 s-1), and in the irrigated genotypes Aran, Vostorg, and 12thIWWYT no. 9 (24.9, 23.4, and 24.0 µmol CO2 m-2 s-1). Stomatal conductance (0.115, 0.120, 0.130, 0.164 mol H2O m-2 s-1), the concentration of CO2 in intercellular spaces (146.3, 156, 5, 181.7, and 213.7 µmol CO2mol-1) and the transpiration rate (3.32, 3.58, 4.13 and 4.44 mmol H2O m-2 s-1) were higher in the Sheki 1, Aran, Tale 38, and Zirva 85 varieties, which manifest higher photosynthetic rate under drought conditions than other genotypes. A significant positive correlation of RWC with the rate of photosynthesis, the stomatal conductance, the concentration of CO2 in intercellular spaces, and the rate of transpiration was found under drought stress conditions.
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Study of populations of Urtica dioica L. in the mountain areas of Nakhchivan Autonomous Republic
Статья научная
The distribution, ontogenetic structure, age and growth structure of hay meadow populations, productivity in different periods of ontogenesis of all populations of Urtica dioica L. are considered. Populations of this species are identified and studied. Urtica dioica is a common plant in the highlands of the Nakhchivan Autonomous Republic. An assessment of 10 populations was carried out, the data were presented in the form of tables and graphs. The structure of ontogenesis was studied based on the population method. It has been established that this plant is distributed as part of plant groups in the herbaceous, shrub and forest vegetation of the Sharur, Babek, Kengerli, Shahbuz and Ordubad administrative regions of the Nakhchivan Autonomous Republic.
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Study of rare and endangered species of the Astragalus L. genus in the natural flora of Azerbaijan
Статья научная
In the study, analysis of 29 rare and endangered plant categories of 156 species of Astragalus L. naturally distributed in the flora of Azerbaijan, was conducted. The study found that the area of most species is much smaller than in previous years, and the gene pool of some is endangered. The article provides information on the habitats, biological characteristics, reserves, reasons for changes in natural resources and conservation measures. In the research work, 15 species of Astragalus L. genus were included in the book “Rare Trees and shrubs of Azerbaijan” (2016). As a result of our research, it was determined that 30 new species of the Astragalus L. genus have a small area because of the exposure to anthropogenic factors, and very rare in nature due to lack of special protection. In carrying out the necessary protection measures in the studied species, it was found that 7 new species are endemic, and 23 species are recommended to be included in the Red Book of Azerbaijan as endangered shrubs and plants.
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Study of species of Campanula L. subgenus found in Karabakh and Zangezur flora
Статья обзорная
Karabakh and Zangezur are the south-eastern end of the Lesser Caucasus, and they are distinguished by their climate and landscape diversity with a rich in vegetation. Analysis of literature and herbarium specimens collected in this region is an invaluable source for a comprehensive assessment of the state of the ecosystems of Karabakh and Zangezur over the past 30 years. This is the purpose of the study of the genus Campanula which is widespread in the northern hemisphere and is of special importance for the flora of the Caucasus. According to literature, 110 species of this genus are found in the Caucasus, and 46 - in Azerbaijan. The history of the study of the genus, its geographical distribution, as well as the taxa found in the flora of Karabakh and Zangezur were compared, and the herbarium data stored in the BAK were analyzed. It was found that the subgenus Campanula L., which is the richest of the subgenus in terms of the number of species of the genus, includes 11 sections. And 18 taxa belonging to 7 sections are found in the flora of Azerbaijan, 11 taxa of which are found in the flora of Karabakh and Zangezur. During the examination of herbarium specimens of the genus Campanula L. stored in the BAK, it was found that 20 herbarium specimens belonging to 5 species were collected from Karabakh region.
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Статья научная
Cosmetic and medical oils have been widely used in medicine and cosmetology for many years. The main function of medical oils is to be a carrier in medicinal preparations. But in many cases, they perform a therapeutic function at the same time. It should be noted that for obtaining medical and cosmetic oils, low-sulfur and low-paraffin oils are more appropriate. In the context of the conducted research, the antimicrobial activity of various combinations of essential oils obtained from eucalyptus and thuja plants with therapeutic white naphthalan oil taken as a control variant was studied to clarify the effective bactericidal action mechanism. In the preparation of these compositions were prepared with the addition of therapeutic white naphthalan oil as the main component, and in addition, essential oil separated from eucalyptus and thuja plants in the ratio of 1:0,04:0,08:0,1 was analyzed for their antimicrobial effects on 4 microbes ( Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, Candida albicans ). Medicinal and cosmetic products were determined according to the received antimicrobial effective compositions.
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Статья научная
Human beings have used plants as medicine for various health cause of years. Plants are widely used in the traditional medicine of different countries and are a source of strong drugs. To evaluate research some bioactive properties of the extract of the Crocus cancellatus subsp. mazziaricus (Herb.) B. Mathew, 1982 the antioxidant activities of these extracts were analyzed by means of cleaning methods (DPPH, ABTS scavenging activity), β-carotene/linoleic acid test system and FRAP activity. Phenolics and flavonoid contents as the equivalents of gallic acid, quercetin respectively. The phenolic content of the extracts was analyzed using HPLC. Brine shrimp lethality test was applied to analyze cytotoxic activity. The obtained results indicated that the highest phenolic compound ferulic acid with 2376.2±0.00 µg/g was in extracts. The highest total phenolic and flavonoid were found in the ethanolic extracts. The aerial part-methanol extract exhibited the highest antioxidant capacity and the corm acetone extract the highest amount of ferric reducing power activity. Among the four different extracts, the acetone extract showed the highest amount of radical scavenging both corm and aerial parts. The brine shrimp lethality assay of bulb ethanol extract has showed good cytotoxic with LC50 of 320.535 μg/mL. This study will be a source for future studies.
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Статья научная
Cranberry and medlar are common in the Guba, Gusar, and Sheki regions of Azerbaijan. A study was conducted to determine the habitats of wild growing forms and biomorphological features. Identification was carried out based on molecular markers. A comparative study of the biomorphological characteristics of genotypes, economic indicators, pomological analysis and assessment of similarity by quantitative indicators was carried out.
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Subalpine grassland vegetation of Yardimli and Astara districts (Azerbaijan)
Статья научная
Subalpine grasslands of Talish highlands are common in the subalpine zone of Yardimli and Astara highlands at lawny mountain-meadow soils at the height of 1750 m to 2400 m above sea level. During the carried out ecological-geobotanical research, it has been determined 3 formation classes, 5 formation groups and 11 associations. In parallel with the study of type composition and structure of phytocenosis found in the area of investigation, it has been also determined endemic species, productivity of formations, and intensification of degradation at soil-plant coverage of some lawny subalpine grasslands, decrease in abundance and productivity of forage crop. Currently, for the purpose of the improvement of natural phytocenosis productivity, crop quality, protection of their genetic reserve and landscapes, as well as the vegetation study for solution of protection problems on the base of scientific means is of a great importance.
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Subalpine meadow vegetation of Talish highlands of Azerbaijan
Статья научная
Subalpine meadow vegetation of Talish highlands has been spread over the subalpine zone of Lankaran highlands at lawny mountain-meadow soils at the height of 1800 m to 2500 m above sea level. During the carried out ecological-geobotanical research, it has been determined 7 formation classes, 12 formation groups and 20 associations. In parallel with the study of type composition and structure of phytocenosis found in the area of investigation, it has been also determined endemic species, productivity of formations, and intensification of degradation at soil-plant coverage of some lawny subalpine meadows, decrease in abundance and productivity of forage crop. Currently, for the purpose of the improvement of natural phytocenosis productivity, crop quality, protection of their genetic reserve and landscapes, as well as the vegetation study for solution of protection problems on the base of scientific means is of a great importance.
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Sustainability of introduced Lonicera L. species to Absheron conditions
Статья научная
The study provides a comprehensive analysis of the results of the introduction of 13 species of the genus Lonicera L. in the conditions of Absheron. Information was obtained on the developmental biology of the introduced species Lonicera L., vegetation features, growth of shoots were studied. The results of many studies of the relationship between winter hardiness and the duration of the growing season are given. It was found that the vegetation can be divided into 6 phenological groups according to the start and end times of the vegetation, and the plants were selected for their sustainability to adverse conditions. The analysis of the collected material shows the distribution of plants by phenogroups and their winter hardiness.
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