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    Anti-Staphylococcal Activity of Verbascum thapsus L. against Methicillin-Resistant Staphylococcus aureus
    (Duzce Univ, 2017) Dulger, Gorkem; Tutenocakli, Tulay; Dulger, Basaran
    Objective: In this study, it was aimed to investigate the anti-Staphylococcal activity of ethanol extract obtained from leaves of Verbascum thapsus L. (Scrophulariaceae) plant. Methods: The anti-Staphylococcal activity of the extract of ethanol extracted from the leaves of Verbascum thapsus L. (Scrophulariaceae) was investigated against Methicillin-Resistant Staphylococcus aureus (MRSA) bacteria by Agarwell diffusion method and microdilution method. Results: The ethanol extract showed antibacterial activity against Methicillin-resistant Staphylococcus aureus (MRSA) strains (MIC < 1024 mu g/mL). When compared with Methicillin and Gentamicin, the extract was more effective against MRSA strains. Conclusion: The use of Verbascum thapsus L. (Scrophulariaceae) as an anti-Staphylococcal agent has been found to be appropriate in vitro and should be performed in vivo.
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    Determination of Germination Threshold Value of Chickpea Varieties with GGE Biplot Method Under Different Irrigation Water Salinity Conditions
    (Ankara Univ, Fac Agr, 2022) Tas, Ismail; Tutenocakli, Tulay; Coskun, Yalcin; Akcura, Mevlut
    For sustainable agricultural production, besides drought, plant resistance to irrigation water and soil salinity should be investigated. Researchers mostly focused on salinity and drought resistance of common species such as wheat, barley, maize, etc. However, the number of studies on chickpea with various uses is quite limited. In the present study, 11 chickpea varieties (Aksu, Arda, Hasanbey, Azkan, Cagatay, Aslanbey, Inci, Seckin, 21C, 42C and EN1867) were subjected to germination tests under different levels of irrigation water salinity (ECi) conditions to identify irrigation water salinity resistant and sensitive varieties. In germination tests, besides control treatment (0 dS/m), five different EC levels (6, 8 10, 12 and 16 dS/m) were used in germination solution. The sodium absorption ratio of saline waters was adjusted to be below 3. GGE biplot method was used for visual assessment of genotype response to saline irrigation waters. The threshold salinity value for germination was identified as 12 dS/m based on germination ratios and seedling dry weights, 8 dS/m based on seedling stem lengths and 10 dS/m based on seedling root lengths. Based on germination ratios and seedling dry weights, Azkan cultivar was identified as the most resistant and Cagatay cultivar was identified as the most sensitive cultivar to irrigation water salinity.
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    Fast selection opportunity of salt tolerant guar bean genotypes with GGE biplot method
    (Taylor & Francis Ltd, 2023) Tas, Ismail; Akcura, Mevlut; Coskun, Yalcin; Tutenocakli, Tulay
    In this study, 81 guar bean genotypes developed in Turkey were tested in the germination stage under saline conditions, and Genotype-Genotype-Environment (GGE) biplot method was used to identify salt tolerant and sensitive genotypes. In the study, irrigation waters with six different Electrical Conductivity (ECi = 0.5 [control], 6, 8, 10, 12, and 15 dS m(-1)) levels were used. Split-plots experimental design was used in the study, and it was carried out in a laboratory environment with three replications. A dry-weight-based stress tolerance index (STI) was calculated for each ECi level. Salt treatments were considered as environments in GGE biplot analysis conducted for genotype selection based on salt concentrations. Seedling dry weight of some genotypes significantly decreased after 8 dS m(-1) level and such decreases were more remarkable in the other genotypes after 12 dS m(-1) level. It was concluded that ECi = 8 dS m(-1) level could be used for selection of genotypes with moderate salt tolerance and high adaptation capacity and ECi = 12 dS m(-1) level could be used for selection of genotypes with a high salt tolerance and special adaptation capacity. It was also concluded that the GGE biplot method quite facilitated the selection of genotypes tolerant to abiotic stressors, especially to salt stress.
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    STUDIES ON THE MEDICINAL PLANTS OF AYVACIK-CANAKKALE IN TURKEY
    (Pakistan Botanical Soc, 2012) Uysal, Ismet; Guecel, Salih; Tutenocakli, Tulay; Ozturk, Munir
    A total of 117 taxa belonging to 42 families were collected from the Ayvacik city of Canakkale. Out of these 43 taxa were observed to be used for medicinal purposes with 54 applications. Lamiaceae dominated the list with 12 taxa followed by Asteraceae with 5 species and Malvaceae, Liliaceae, Urticaceae with 2 species each.The most commonly used taxa are Origanum majorona, O. onites, O. vulgare ssp. hirtum, Salvia fruticosa, Sideritis perfoliata, Thymus longicaulis ssp. chaubardii var. chaubardii, Lavandula stoechas ssp. stoechas. Teucrium polium, Urtica dioica, Halm sylvestris, Portulaca oleracea, Urtica rubra ssp. caucasica. Vitex agnus-castus, Vitis vinifera, Asparagus acutifolius, Foeniculum vulgare, Juniperus oxycedrus ssp. oxycedrus, and Hypericum perforation. The taxa recorded here have been mostly used for the treatment of cough (18.6%), stomachache (13.4%), kidney ailments (11.6%), cold, analgesic, diuretic and hemorrhoid (9. 3%), injuries, tonic, abdominal pain, laxative and dyspepsia (6.9%).