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Articles 12361 - 12390 of 15505
Full-Text Articles in Entire DC Network
Biological Control Of Bacterial Spot Disease Of Pepper With Bacillus Strains, Mustafa Mi̇ri̇k, Yeşi̇m Aysan, Özden Çinar
Biological Control Of Bacterial Spot Disease Of Pepper With Bacillus Strains, Mustafa Mi̇ri̇k, Yeşi̇m Aysan, Özden Çinar
Turkish Journal of Agriculture and Forestry
Bacterial spot disease caused by Xanthomonas axonopodis pv. vesicatoria (X. axonopodis pv. vesicatoria) is a devastating pepper (Capsicum annuum) disease in Turkey. Biological control of Xanthomonas axanopodis pv. vesicatoria is of great interest, in terms of environmental safety and economic return. In this study, 3 Bacillus strains isolated from soil samples of the rhizospheres of peppers grown in greenhouses and fields were used to suppress the size of the population of X. axonopodis pv. vesicatoria. Results indicated that disease development decreased by 11%-62% and 38%-67% in pepper plants inoculated with the 3 Bacillus strains alone and in combination, respectively, in …
Comparison Of Sea Buckthorn Genotypes (Hippophae Rhamnoides L.) Based On Rapd And Fame Data, Sezai̇ Erci̇şli̇, Emi̇ne Orhan, Nalan Yildirim, Güleray Ağar
Comparison Of Sea Buckthorn Genotypes (Hippophae Rhamnoides L.) Based On Rapd And Fame Data, Sezai̇ Erci̇şli̇, Emi̇ne Orhan, Nalan Yildirim, Güleray Ağar
Turkish Journal of Agriculture and Forestry
FAME and RAPD profiles were used to examine biochemical and genetic relationships between 10 selected sea buckthorn genotypes found in the same area of Eastern Anatolia. Fatty acid composition of sea buckthorn berries was determined using gas chromatography. Fatty acid results showed that there were differences between genotypes in both the percent and presence of fatty acids in the berries. Myristic acid was detected only in berries of the ESB8 and ESB9 genotypes. Nervonic acid was detected only in the ESB5 genotype and linoleic acid was detected only in the ESB4 genotype. RAPD data also showed that the ESB4 genotype …
Host Preference And Nutrition Efficiency Of The Gypsy Moth, Lymantria Dispar L. (Lymantriidae: Lepidoptera), On Different Poplar Clones, Mehrdad Ghodskhahe Daryaei, Simin Darvishi, Kayvan Etebari, Mansor Salehi
Host Preference And Nutrition Efficiency Of The Gypsy Moth, Lymantria Dispar L. (Lymantriidae: Lepidoptera), On Different Poplar Clones, Mehrdad Ghodskhahe Daryaei, Simin Darvishi, Kayvan Etebari, Mansor Salehi
Turkish Journal of Agriculture and Forestry
Poplar is a tree species with a considerable growth rate and the ability to produce high yield in a short period of time, and is one of the main sources of wood in Iran. Considering its importance, the identification of poplar pests could have a significant effect on improving production and forest management. The gypsy moth, Lymantria dispar L. (Lymantriidae: Lepidoptera), is an important pest of forest trees in Guilan province, northern Iran. Therefore, host preference of this pest on the clones of Populus deltoids Bartram ex Marsh., P. euramericana (Dode), and P. caspica (Bornm.) was analyzed. The host preference …
Field Resistance Of Wheat (Triticum Aestivum L.) Genotypes From Different Countries To Leaf Rust (Puccinia Triticina), Beyhan Akin, Nusret Zenci̇rci̇, İzzet Özseven
Field Resistance Of Wheat (Triticum Aestivum L.) Genotypes From Different Countries To Leaf Rust (Puccinia Triticina), Beyhan Akin, Nusret Zenci̇rci̇, İzzet Özseven
Turkish Journal of Agriculture and Forestry
Puccinia triticina causes leaf rust in wheat and results in severe yield losses in mild wheat growing areas of Turkey: Thrace, Marmara, Mediterranean, and Çukurova. A feasible way to avoid any damage is to grow slow rusting cultivars. We evaluated 94 wheat genotypes from different countries and 39 leaf rust differentials for their reactions to leaf rust field epidemics. Slow rusting, though, requires both the prediction of Lr genes in the greenhouse and an effective screening of genotypes against the leaf rust field epidemics; the evaluation at the sites regularly favoring leaf rust epidemics like Adapazarı is also possible. Various …
Response Of Silage Maize (Zea Mays L.) To Nitrogen Fertilizer After Different Crops In A Semi Arid Environment, İsmai̇l Gül, Mehmet Yildirim, Cuma Akinci, İlhan Doran, Hasan Kiliç
Response Of Silage Maize (Zea Mays L.) To Nitrogen Fertilizer After Different Crops In A Semi Arid Environment, İsmai̇l Gül, Mehmet Yildirim, Cuma Akinci, İlhan Doran, Hasan Kiliç
Turkish Journal of Agriculture and Forestry
The use of legume crops in maize rotation systems may decrease the need for nitrogen (N) fertilization and increase total output. The effect of previous crops (wheat, barley, lentil, Hungarian vetch, and fallow) and different N fertilization rates (0, 120, 160, 200, and 240 kg of N ha^{-1}) on yield and N content of silage maize (Zea mays L.) were evaluated under irrigated conditions in Diyarbakır, Turkey, during the 1999-2000, 2000-2001, and 2001-2002 growing seasons. Dry matter yield varied between 10,068.2 and 16,480.4 kg ha^{-1}. It was determined that Hungarian vetch was a suitable rotation crop, and that 200 kg …
Litter Mass Loss Rates In Deciduous And Coniferous Trees In Artvin, Northeast Turkey: Relationships With Litter Quality, Microclimate, And Soil Characteristics, Temel Sariyildiz, Mehmet Küçük
Litter Mass Loss Rates In Deciduous And Coniferous Trees In Artvin, Northeast Turkey: Relationships With Litter Quality, Microclimate, And Soil Characteristics, Temel Sariyildiz, Mehmet Küçük
Turkish Journal of Agriculture and Forestry
Plant litter decomposition is controlled by both biotic and abiotic factors. It has been widely hypothesized that litter quality and climatic and soil conditions regulate decomposition. The present study examined the decomposition of native forest tree litter on 2 aspects (the north and the south) and at 3 altitudes (top, middle, and bottom) on each aspect in Artvin province to determine the influence of litter quality, microclimate, and soil characteristics on the rate of decomposition. A litter-bag experiment was performed using beech, oak, fir, and pine litter. The litter bags were placed on the north- and south-facing sites and at …
On Some Algebraic Properties Of Semi-Discrete Hyperbolic Type Equations, İsmagi̇l Habibullin, Asli Pekcan, Natalya Zheltukhina
On Some Algebraic Properties Of Semi-Discrete Hyperbolic Type Equations, İsmagi̇l Habibullin, Asli Pekcan, Natalya Zheltukhina
Turkish Journal of Mathematics
Nonlinear semi-discrete equations of the form t_x(n+1) = f(t(n), t(n+1), t_x(n)) are studied. An adequate algebraic formulation of the Darboux integrability is discussed and an attempt to adopt this notion to the classification of Darboux integrable chains has been undertaken.
The Nickel Hyperaccumulating Plants Of The Serpentines Of Turkey And Adjacent Areas: A Review With New Data, Roger D. Reeves, Nezaket Adigüzel
The Nickel Hyperaccumulating Plants Of The Serpentines Of Turkey And Adjacent Areas: A Review With New Data, Roger D. Reeves, Nezaket Adigüzel
Turkish Journal of Biology
Botanical exploration of serpentine soils in Turkey and neighbouring countries has shown that the region includes at least 59 taxa capable of hyperaccumulating nickel (to >0.1% of plant dry weight). These hyperaccumulators belong to the Brassicaceae (Aethionema R.Br., Alyssum L., Bornmuellera Hausskn., Pseudosempervivum (Boiss.) Grossh. (Cochlearia L.), and Thlaspi L. s.l.) and the Asteraceae (Centaurea L.). We review present knowledge of the hyperaccumulators and provide additional data recently obtained. Some species are serpentine-endemic and invariably Ni hyperaccumulating; others show more complex distribution and Ni-accumulating behaviour. Many are good subjects for biochemical studies on the Ni-accumulation and sequestering processes. There is …
Chitinase Production By Serratia Marcescens Gg5, Gursharan Singh, Joginder Ram Sharma, Gurinder Singh Hoondal
Chitinase Production By Serratia Marcescens Gg5, Gursharan Singh, Joginder Ram Sharma, Gurinder Singh Hoondal
Turkish Journal of Biology
Swollen chitin, flake chitin, powder chitin, and mushroom paste were used as substrates for chitinase production by Serratia marcescens GG5 in submerged fermentation. Enzyme production was 0.3 U/ml when the organism was grown in M9 medium supplemented with 0.5% swollen chitin and 0.5% soluble starch. Scanning electron microscopy revealed that Serratia marcescens GG5 digested the chitin flakes by producing chitinase.
The Effects Of Mistletoe (Viscum Album L. Subsp. Album) Extracts On Isolated Intestinal Contractions, Alper Karakaş, Erdi̇nç Seri̇n, Bülent Gündüz, Arzu Uçar Türker
The Effects Of Mistletoe (Viscum Album L. Subsp. Album) Extracts On Isolated Intestinal Contractions, Alper Karakaş, Erdi̇nç Seri̇n, Bülent Gündüz, Arzu Uçar Türker
Turkish Journal of Biology
Throughout history folk medicine has served as an alternative or complimentary method of treating disorders like intestinal colic. Mistletoe is a common name for many species of semi-parasitic plants that grow on trees throughout the world, and has been used widely to treat intestinal colic. We conducted a study to evaluate the effect of freeze-dried (group 1) and heat-treated (group 2) extracts of Viscum album subsp. album leaves on contractions induced by acetylcholine in isolated hamster intestinal segments (duodenum, jejunum, and ileum). Freeze-dried extracts decreased intestinal contractions in all the intestinal segments (P < 0.05). The strongest relaxant effect was observed in the jejunum and the weakest was seen in the duodenum. Higher doses of heat-treated extracts were required to affect segmental contractions than that of freeze-dried extracts (P < 0.05); heat-treated extracts had the greatest effect on reducing contractions in the jejunum and the least effect in the duodenum. Mistletoe extracts affected the level of contractions in a dose- and extraction preparation-dependent manner. The results of this study show that mistletoe extracts could be effective against intestinal motility problems and that they have potential use as a therapeutic remedy for intestinal colic.
Optimization Of Process Parameters For Alkaline Protease Production By Bacillus Licheniformis N-2 And Kinetics Studies In Batch Fermentation, Muhammad Nadeem, Javed Iqbal Qazi, Qurat-Ul-Ain Syed, Shahjahan Baig
Optimization Of Process Parameters For Alkaline Protease Production By Bacillus Licheniformis N-2 And Kinetics Studies In Batch Fermentation, Muhammad Nadeem, Javed Iqbal Qazi, Qurat-Ul-Ain Syed, Shahjahan Baig
Turkish Journal of Biology
Production of alkaline protease from B. licheniformis N-2 was studied in shake flask experiments in growth medium comprised of (g/l): glucose, 10; soybean meal, 10; K_2HPO_4, 5; MgSO_4.7H_2O, 0.5; NaCl, 0.5; CaCl_2.2H_2O, 0.5. Different process parameters, such as fermentation period, initial pH, incubation temperature, agitation speed, and size and age of inoculum, were optimized for the maximum yield of the alkaline protease. Maximum enzyme production (991.04 PU/ml) was obtained after 24 h of incubation at 37 °C in growth medium of pH 10. The optimum inoculum size and age were determined as 2.0% (v/v) and 24 h, respectively. Kinetics of …
The Interaction Effects Of Flooding And Kinetin On Growth Criteria, Chlorophyll Content, And 5-Aminolevulinic Acid Dehydratase Activity In Corn Seedlings, Rashid Jamei, Reza Heidari, Jalil Khara, Samad Zare
The Interaction Effects Of Flooding And Kinetin On Growth Criteria, Chlorophyll Content, And 5-Aminolevulinic Acid Dehydratase Activity In Corn Seedlings, Rashid Jamei, Reza Heidari, Jalil Khara, Samad Zare
Turkish Journal of Biology
The interaction effects of kinetin and flooding on growth indexes, chlorophyll content, and the activity of 5-aminolevulinic acid dehydratase (ALA-D; EC 4.2.1.24) in seedlings of corn (Zea mays L. cv. 704) were investigated. Samples were taken 48, 96, 144, and 192 h after the start of treatment. Growth criteria (root length, shoot height, and dry weight) were inhibited more in flooded plants than in control plants. The pattern of growth changes was similar to chlorophyll a and b, as well as ALA-D activity. The exogenous application of kinetin (100 ppm) nullified the resulting decrease in growth and chlorophyll, but only …
In Vivo Anti-Ulcerogenic Activity Of Equisetum Telmateia Ehrh. Extracts Used In Turkish Folk Medicine, İlhan Gürbüz, Erdem Yeşi̇lada
In Vivo Anti-Ulcerogenic Activity Of Equisetum Telmateia Ehrh. Extracts Used In Turkish Folk Medicine, İlhan Gürbüz, Erdem Yeşi̇lada
Turkish Journal of Biology
The aerial part of Equisetum telmateia Ehrh. is used against various conditions including stomachache and peptic ulcer in Turkish folk medicine. In order to prove the claimed anti-ulcerogenic potential of the plant, aqueous and methanol extracts were prepared from aerial parts of E. telmateia and investigated for their anti-ulcerogenic effect on ethanol-induced gastric ulcer model in rats. Pharmacological experiments clearly demonstrated that the oral administration of both methanol and aqueous extracts of Equisetum telmateia Ehrh. plant showed significant stomach protection (77.9% and 100% ulcer inhibition, respectively) against the applied model of ulcerogenesis (P < 0.001). Since both extracts were found significantly active, 80% ethanol was preferred for the extraction of the plant material and this crude methanolic extract was further fractionated by successive solvent extractions with chloroform and H_2O saturated n-BuOH to obtain the chloroform and n-BuOH extracts as well as the remaining aqueous extract. The 80% ethanol extract and the solvent extracts were then submitted to pharmacological assay using the same in vivo experimental ulcer model. All the extracts statistically showed potent anti-ulcerogenic effect on this model (P < 0.001). However, the remaining aqueous extract was found prominent (98.2% ulcer inhibition). Consequently, folkloric utilization of E. telmateia on peptic ulcer has been confirmed in the present study by using ethanol-induced experimental ulcer model in rats.
Determination Of Antimicrobial And Antioxidant Activities Of Turkish Endemic Salvia Halophila Hedge, Sevi̇l Albayrak, Ahmet Aksoy, Ergi̇n Hamzaoğlu
Determination Of Antimicrobial And Antioxidant Activities Of Turkish Endemic Salvia Halophila Hedge, Sevi̇l Albayrak, Ahmet Aksoy, Ergi̇n Hamzaoğlu
Turkish Journal of Biology
In this study, the antioxidant activity of ethanol extract of Salvia halophila Hedge (Lamiaceae) was evaluated by 2 antioxidant assays, including phosphomolybdenum reduction and free radical scavenging activity. The ethanol extract showed free radical scavenging activity with IC_{50} of 67.73 \mug/mL in 1,1-diphenyl-2-picrylhydrazyl (DPPH) assay. The antioxidant activity of the extract was found to be 84.87 ± 0.7 mg ascorbic acid equivalent (AAE)/g extract in phosphomolybdenum assay. In the addition to the antioxidant activity of the extract, the total phenolic content was measured. Total phenolic content of ethanol extract was found to be 8.21 ± 0.0 mg gallic acid equivalent …
Investigation Of The Antimutagenic Potentials Of The Methanol Extract Of Origanum Vulgare L. Subsp. Vulgare In The Eastern Anatolia Region Of Turkey, Tüli̇n Özbek, Medi̇ne Güllüce, Fi̇kretti̇n Şahi̇n, Hakan Özkan, Sevgi̇ Sevsay, Özlem Bariş
Investigation Of The Antimutagenic Potentials Of The Methanol Extract Of Origanum Vulgare L. Subsp. Vulgare In The Eastern Anatolia Region Of Turkey, Tüli̇n Özbek, Medi̇ne Güllüce, Fi̇kretti̇n Şahi̇n, Hakan Özkan, Sevgi̇ Sevsay, Özlem Bariş
Turkish Journal of Biology
The aim of this study was to evaluate the antimutagenic activity of the methanol extract of Origanum vulgare L. subsp. vulgare. Antimutagenic activity was estimated by employing the plate incorporation AMES/Salmonella histidine reversion assay. The base pair substitution tester strain Salmonella typhimurium TA1535 and the frame shift mutagen strain S. typhimurium TA1538 were used against direct acting mutagens - sodium azide (NaN_3), 4-nitro-1-quinoline oxide (4NQO) and the S9-dependent mutagen 2-aminofluorene (2AF). The results suggested that in the absence of S9 metabolic activation, all 3 doses (5, 0.5, and 0.05 \mug/plate) of the plant extract tested caused statistically significant (P < 0.05) antimutagenic activity on TA1535 strain, but not on TA1538 strain. However, in the presence of S9 microsomal fraction, the plant extract exerted moderate antimutagenic activity against the 2AF mutagen and reduced mutant colonies in TA1535 and TA1538 strains. As a result, the methanol extract of Origanum vulgare subsp. vulgare showed antimutagenic effects at 5, 0.5, and 0.05 \mug/plate concentrations. These effects may be explained with the antioxidant activity mechanism, changes in membrane lipids, and permeability of ion channels.
Analysis Of Ki-Ras Exon 2 Gene Mutations In 3-Methylcholanthrene And Butylated Hydroxytoluene-Induced Rat Lung Tissues, Fi̇kri̇ye Polat, Öztürk Özdemi̇r, Şahende Elagöz
Analysis Of Ki-Ras Exon 2 Gene Mutations In 3-Methylcholanthrene And Butylated Hydroxytoluene-Induced Rat Lung Tissues, Fi̇kri̇ye Polat, Öztürk Özdemi̇r, Şahende Elagöz
Turkish Journal of Biology
3-Methylcholanthrene (MCA) is a polycyclic aromatic hydrocarbon and potent carcinogenic agent that is often used in experimental cancer studies. Butylated hydroxytoluene (BHT) has been widely used for many years as an antioxidant to preserve and stabilize the freshness, nutritional value, flavor, and color of foods. The aim of the present study was to investigate the role of the application of MCA and BHT in the development of lung cancer, and to detect any mutation in the Ki-ras gene exon 2. Rats were killed by cervical dislocation 26 weeks after the last BHT injection and lung tissues were surgically removed. Lung …
Phytoplankton Species Composition And Seasonal Variation At Wadi Al-Arab Dam Lake, Jordan, Ismail M. Saadoun, Erwah Bataineh, Adil Alhandal
Phytoplankton Species Composition And Seasonal Variation At Wadi Al-Arab Dam Lake, Jordan, Ismail M. Saadoun, Erwah Bataineh, Adil Alhandal
Turkish Journal of Biology
The composition of phytoplankton species thriving in Wadi Al-Arab Dam Reservoir, Jordan and their seasonal variation in relation to water ecology were studied between February 2001 and February 2002. A total of 75 species of phytoplankton were identified: Bacillariophyceae (diatoms) contributed with the highest number of taxa (39) followed by Chlorophyceae (23), Cyanophyceae (9), and Dinophyceae (4). Diatoms constituted 52% of the total phytoplankton flora of the reservoir and the most common species were Synedra ulna, Cymbella affinis, and Cyclotella meneghiniana with pennate and centric diatoms being the dominant species in May and October-November, respectively. Although Chlorophytes occurred most of …
Implications Of Cereal-Based Crop Rotations, Nitrogen Fertilization, And Stubble Grazing On Soil Organic Matter In A Mediterranean-Type Environment, John Ryan, S. Masri, Hayri̇ye İbri̇kçi̇, M. Singh, Mustafa Pala, H. C. Harris
Implications Of Cereal-Based Crop Rotations, Nitrogen Fertilization, And Stubble Grazing On Soil Organic Matter In A Mediterranean-Type Environment, John Ryan, S. Masri, Hayri̇ye İbri̇kçi̇, M. Singh, Mustafa Pala, H. C. Harris
Turkish Journal of Agriculture and Forestry
Soil organic matter (SOM) is essential to all soil processes that have an impact on crop production and the environment. Soils of the semi-arid Mediterranean region are low in SOM due to environmental conditions (temperature, moisture) and centuries of cultivation. Hence, as SOM has a major influence on soil aggregation, nutrient supply, and soil moisture, as well as the relationships between them, there is a need to assess the impact of cropping systems on this critical soil parameter. During a 14-year rotation trial of durum wheat with alternate crops in northern Syria (mean annual rainfall: 340 mm), we examined the …
The Flora Of Üzümlü-Sakaltutan (Erzincan-Gümüşhane), Ali̇ Kandemi̇r, Zafer Türkmen
The Flora Of Üzümlü-Sakaltutan (Erzincan-Gümüşhane), Ali̇ Kandemi̇r, Zafer Türkmen
Turkish Journal of Botany
This study was carried out to determine the flora of the area between Üzümlü and Sakaltutan (Erzincan-Gümüşhane). In this research, conducted between 2001 and 2006, 5210 plant specimens were collected from the research area, and 960 taxa (at specific and intraspecific ranks) belonging to 344 genera and 73 families were reported. The large families are Asteraceae (152 taxa), Brassicaceae (78 taxa), Fabaceae (73 taxa), Caryophyllaceae (64 taxa), and Lamiaceae (62 taxa). The large genera are Astragalus L. (30), Silene L. (27), Allium L. (18), Tanacetum L. (14), Centaurea L. (13), and Alchemilla L. (13). The number of endemic taxa is …
Check-List Of The Genus Biarum Schott In The Flora Of Turkey, With A New Record For Turkey: Biarum Syriacum (Spreng.) H.Riedl, Hasan Akan, Mehmet Maruf Balos
Check-List Of The Genus Biarum Schott In The Flora Of Turkey, With A New Record For Turkey: Biarum Syriacum (Spreng.) H.Riedl, Hasan Akan, Mehmet Maruf Balos
Turkish Journal of Botany
A check-list of the genus Biarum Schott in the Flora of Turkey is presented, with 10 taxa, of which 2 are endemic to Turkey. A list of taxonomical changes that have occurred since the publication of the Flora of Turkey, Supplement II is given. In addition, Biarum syriacum (Spreng.) H.Riedl is recorded for the first time (C6 Gaziantep) from Turkey. In this paper an expanded morphological description of this species is provided. Moreover, an image of a type specimen, a photograph of a plant from the field, an illustration of a plant, and a distribution map are presented.
Taxonomy And Threatened Categories Of Three Achillea L. (Asteraceae-Anthemideae) Species Previously Cited In The Data Deficient (Dd) Category, Turan Arabaci, Bayram Yildiz
Taxonomy And Threatened Categories Of Three Achillea L. (Asteraceae-Anthemideae) Species Previously Cited In The Data Deficient (Dd) Category, Turan Arabaci, Bayram Yildiz
Turkish Journal of Botany
This study presents the taxonomy and threatened categories of 3 Achillea L. (Asteraceae-Anthemideae) species: A. membranacea (Labill.) DC., A. brachyphylla Boiss. & Hausskn., and A. boissieri Hausskn. ex Boiss. These species belong to sect. Babounya (DC.) O.Hoffm. and were previously placed in the data deficient (DD) category in the Red Data Book of Turkish Plants. Descriptions, localities, distribution map, and images of the species are given. Threatened categories of the species were determined as A. membranacea in VU, and A. brachyphylla and A. boissieri in EN.