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The effects of elevation on the morpho-anatomical and ecological traits in Cyclamen coum subsp. coum Mill. populations in the Central Black Sea Region of Turkey in contrasting habitats

100%

Ozbucak T. B., Polat G., Akcin O. E., Kutbay H. G.

Polish Journal of Ecology

2017

tom 65

nr 2

The differences in morpho-anatomical, ecological and biochemical traits of Cyclamen coum subsp. coum, threatened plant listed in CITES (Convention on International Trade in Endangered Species of Wild Fauna & Flora) have been investigated in the central Black Sea region of Turkey in the context of its distribution at different altitudes. We found that shoot length, bulb width, leaf width and length, number of branches and flowers were significantly different along elevation gradient, whereas length of tubers, number of living and dead leaves, number of nodes, specific leaf area (SLA) and leaf mass area (LMA) values, did not differ significantly, PCA analysis revealed that leaf length and width, the number of branches, soil organic matter content and available potassium concentration and N concentrations of above and belowground parts and reproductive effort (RE3) played significant role in differentiation of the studied populations, while several other studied factor were found not significant. The reproductive effort of individuals from the sea level was higher. We suggest that significant differences in the studied traits may indicate the ecotypic differentiation among populations.

Antimicrobial activities of some medicinal essential oils

100%

Erturk O., Ozbucak T. B., Bayrak A.

Herba Polonica

2006

tom 52

nr 1-2

In this study, the antimicrobial properties of essential oils obtained from Coriandrum sativum, Foeniculum vulgare Miller, Salvia triloba, Laurus nobilis L., Citrus limon and Origanum smyrnaeum L. were investigated. A total of eight microbial organisms belonging to six species of bacteria, namely Salmonella typhimurium, Staphylococcus aureus, Staphylococcus epidermidis, Pseudomonas aeruginosa, Escherichia coli and Enterobacter aerogenes, as well as two fungi, Candida albicans and Aspergillus niger, were studied using a disc-diffusion and agar dilution (minimal inhibition concentration) method. The antimicrobial activity of essential oils obtained from the six plants turned out to be more effective in the case of bacteria than against fungi. The antimicrobial activity against Gram-positive bacteria was more pronounced than against Gram-negative ones. All the investigated plants are known as having healing properties and are used to treat various diseases. The essential oils obtained from L. nobilis and O. smyrnaeum showed the highest antifungal activity against C. albicans and A. niger, while the essential oils obtained from F. vulgare showed the highest antimicrobial activity against P. aeruginosa and E. coli. On the other hand, the essential oils obtained from O. smyrnaeum showed stronger antibacterial activity in the case of E. aerogenes and S. aureus, but were not equally effective against E. coli. The other crude essential oils showed varied levels of antibacterial and antifungal activity. The minimal inhibition concentrations (MIC ) of the essential oils obtained from O. smyrnaeum and of those obtained from L. nobilis ranged from 1.17 to 4.71 mg/ml, and 2.4 to 19.2 mg/ml, respectively.

Foliar resorption of nutrients in selected sympatric tree species in gallery forest [Black Sea Region]

76%

Ozbucak T. B., Kutbay H. G., Kilic D., Korkmaz H., Bilgin A., Yalcin E., Apaydin Z.

Polish Journal of Ecology

2008

tom 56

nr 2

227-237

Gallery forests in Central Black Sea Region are dominated by Platanus orientalis L. The studies were performed in four sites (Mert River, Adalar, Kurupelit and Taflan Regions) located in V-shaped river valleys and differing with soil conditions. Nutrient concentrations were measured in green and senescent leaves in selected sympatric tree species. Foliar nutrient resorption efficiency (RE; as the ratio of the resorbed amounts of nutrient losses during the leaf senescence to its prior amount deposited in the leaves) and proficiency (RP; the level to which nutrient content per unit leaf mass, mg g⁻¹, has been reduced in senescent leaves) were examined in several sympatric species. The high nitrogen resorption efficiency (N-RE) (62%) were found in Hedera helix L., while the lowest (40%) – in Salix alba L. The phosphorus resorption efficiency (P-RE) ranged between 35% (Rubus discolor Weithe and Nees) and 50% (S. alba) and that of potassium (K-RE) ranged between 49% (S. alba) and 62% (Robinia pseudoacacia L.). The different trend was observed in the values of proficiency (RP). The high nitrogen resorption proficiency (N-RP) ranged between 10 mg g⁻¹ (Clematis vitalba L.) and 18 mg g⁻¹ (R. discolor). The high phosphorus resorption proficiency (P-RP) was found in R. discolor (0.5 mg g⁻¹) similar to N-RP. The lowest P-RP was found in R. pseudoacacia (0.3 mg g⁻¹) like K-RP (5 mg g⁻¹). The high K-RP (10 mg g⁻¹) was found in H. helix. There is no significant difference between four study sites. Soil N, P and organic matter concentrations were significantly correlated with green-leaf N, P and K concentrations. Significant correlations were also found between K-RP and soil nutrient concentrations and soil moisture. However, no significant correlations were found among green-leaf nutrient concentrations, RE, RP and soil nutrient concentrations and moisture.

Ograniczanie wyników

2 Polish Journal of Ecology

1 Herba Polonica

3 Ozbucak T. B.

2 Kutbay H. G.

1 Akcin O. E.

1 Apaydin Z.

1 Bayrak A.

1 Bilgin A.

1 Erturk O.

1 Kilic D.

1 Korkmaz H.

1 Polat G.

1 Yalcin E.

1 2017

1 2008

1 2006

Wyniki wyszukiwania

The effects of elevation on the morpho-anatomical and ecological traits in Cyclamen coum subsp. coum Mill. populations in the Central Black Sea Region of Turkey in contrasting habitats

Antimicrobial activities of some medicinal essential oils

Foliar resorption of nutrients in selected sympatric tree species in gallery forest [Black Sea Region]