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Articles by Ramazan CAKMAKCI
Total Records ( 2 ) for Ramazan CAKMAKCI
  Yasar Erturk , Ramazan Cakmakci , Omur Duyar and Metin Turan
  The objective of the study was to explore possibilities to reduce fertilizer requirement and to identify bacterial strains that used for organically grown Turkish hazelnut cultivars. Plant growth promoting effects of L. enzymogenes 9/8, B. atrophaeus 55/1, A. agilis 2/3, P. macquariensis 59/8, B. lentus (Pb. validus) 29/6, B. pyrrocinia 13/4, P. agglomerans 5/8, R. radiobacter 42/1, S.s maltophilia 21/1, Acinetobacter calcoaceticus 47/6 and mineral fertilizer were tested on Turkish hazelnut cultivars (Tombul and Sivri) based on seedling length, total branch length, branch number trunk diameter and ionic composition of leaves. The results showed that all of bacterial treatments significantly affected the parameters tested. The highest seedling length, total branch length, branch number and trunk diameter of Tombul and Sivri of Turkish hazelnut cultivars was obtained with A. calcoaceticus 47/6, R. radiobacter 42/1, S. maltophilia 21/1, P.macquariensis 59/8, respectively and increasing ratio of seedling length, total branch length, branch number and trunk diameter of Turkish hazelnut cultivars was 24.49, 31.60, 69.28 and 18.74% for Tombul and 21.72, 68.43, 46.90 and 24.41% for Sivri, respectively compared to control. The concentrations of N, P, K, Ca, Mg, Fe, Cu, Mn, Zn, B and Al of plant tissue nutrients were significantly increased by the bacterial treatments tested. All bacterial treatments had positive effect but treatments 13/4 and 42/1 were the most effective in promoting macro and micro nutrient uptake. These results suggest that plant growth rhizobacteria (PGPR) treatments offer an economic and simple means to increase plant growth in soils with low fertility.
  Bulent CETIN , Songul CAKMAKCI and Ramazan CAKMAKCI
  The aim of this study is to investigate in-vitro antimicrobial effects of the essential oils from oregano (Origanum acutidens and Origanum rotundifolium) and thyme (Thymus sipyleus subsp. sipyleus var. rosulans). The chemical composition and antimicrobial attributes of the essential oils obtained from the aerial parts of the plants, of which there were 3 Lamiaceae species, have been studied. A total of 43 microorganisms, including 26 bacteria, 14 fungi, and 3 yeasts species, have been studied by using disc-diffusion (DD) and minimal inhibition concentration (MIC) methods. Mean inhibition zones and MIC values of bacterial strains varied from 8 and 72 mm to 7.8 and 500 μg mL-1, respectively. The maximal inhibition zones and MIC values of the yeast and fungi species sensitive to the essential oils were 8−74 mm and 7.8−500 μg mL-1, respectively. The susceptibility of the tested microorganisms varied depending on the essential oil composition. In general, the essential oils showed higher DD values than tested antibiotics. The essential oils of oregano and thyme may be considered a potential source of a natural antimicrobial for the food industry after testing the toxic and irritating effects on humans.
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