Browsing by Author "Ducci F."

Now showing 1 - 3 of 3

ANTIOXIDANT VARIABILITY OF THE SEEDS IN CORE AND MARGINAL POPULATIONS OF TAURUS CEDAR (Cedrus libani A. Rich.)
(2018-01-01) Ayan S.; Turfan N.; Yer E.N.; Šeho M.; Özel H.B.; Ducci F.
Genetic diversity is the basis for adaptation and survival of tree species under changing environmental conditions, representing the key issue of stability and productivity of forest ecosystems. In this study, core and marginal populations of Taurus cedar (Cedrus libani A. Rich.) were investigated due to their importance in gene conservation. Assessment of genetic diversity in isolated populations is of great importance for the conservation and improvement programs. Under global climate change conditions, they may possess genotypes of future adaptive potential. The aim of this study is to determine the amount of proline to understand water deficiency stress of the population, total soluble proteins, MDA, H 2 O 2 , α-amylase, the variability of antioxidant as CAT, SOD, APX and GuPX of Taurus Cedar seeds fromfive core populations (Kahramanmaraş-Andırın/Elmadağı (AND), Adana-Pozantı/ Pozantı (POZ), Mersin-Anamur/Abanoz (ANA), Antalya-Finike/Aykırıçay (FIN) and Antalya-Kaş/Karaçay (KAS)) and one marginal provenance (Amasya-Tokat-Niksar/Çatalan (NIK)) in Turkey. According to the results, a significant difference was detected between populations. Significantly higher amounts of proline were detected for ANA (7,46 µmol/g) and POZ (7,22 µmol/g) populations, whereas the lowest amounts of proline were detected in KAS (3,98 µmol/g) population, which represent the optimal distribution of Taurus cedar. This finding indicates that POZ and ANA populations, in the transition zone from Mediterranean region to steppe territory, are more resistant to the frost, than the other populations. The highest α-amilase enzyme amount was detected in POZ population, growing in the optimum range for Taurus cedar. Significantly higher levels of H 2 O 2 were detected in NIK (11,97 µmol/g) and ANA (11,60 µmol/g). This is an indication of higher levels of oxidative stress in the seed samples of these populations. With the present research it’s verified that, enzymes such as SOD, CAT, GuPX and APX, controlling reactive oxygen species (ROS) levels in plant cells, are the elements of the antioxidant defence system functioning as protective mechanisms for plants against stress conditions. From the practical point of view, improvement in afforestation performance can be achieved on the steppe of Central Anatolia Region holding the potential afforestation areas of Turkey, through use of forest reproductive materials from POZ and ANA stands with their higher resistance against stress, and NIK as an isolated and marginal population.
Growth Characteristics of Tilia tomentosa Moench. From different districts in the regions of Marmara and Western Black Sea in Turkey
(2019-01-01) Yücedağ C.; Özel H.; Ayan S.; Ducci F.; Isajev V.; Šeho M.
Climate change will affect all ecosystem services of green areas in the districts. In many cases, the tree species in parks and districts are suffering from the increasingly warmer and drier summers and newly immigrated pests and diseases. Tilia tomentosa Moench. is considered as an important tree species under climate change for dry and warm conditions in Central and Southeastern Europe countries. This tree species is often used as valued urban tree. In the present study we investigate the growth patterns of T. tomentosa Moench. in relation to their growing conditions in order to evaluate its interactions in urban contexts. All the studied characters varied significantly among the sampled districts. Within each of the regions, number of flowers showed a wide range 72-104 per m2 in Marmara region and 54-124 per m2 in Western Black Sea region. All studied characters, beyond number of flowers, positively correlated with each other. This study revealed that especially fruit length had a strong and positive correlation with altitude and a high negative correlation with temperature. Further researches are required to quantify more growth flower characters of the species from Turkey.
Preliminary results of Turkish hazelnut (Corylus colurna L.) populations for testing the nut characteristics
(2018-01-01) Ayan S.; Ünalan E.; Sakici O.; Yer E.; Ducci F.; Isajev V.; Ozel H.
Ovaj rad ima za cilj da identifikuje karakteristike lešnika četiri različite populacije (Agli-Tunuslar, Agli-Musellimler, Arac-Guzluk i Tosia-Kucuksekiler) u severozapadnom regionu crnomorske regije Turske, jednoj od najvažnijih oblasti od ekonomskog interesa za ovu vrstu. Tamo, Turski lešnik (Corylus colurna L.) raste u optimalnim uslovima i otkriva relativno visoku medu-populacionu i intra-populacionu varijaciju u pogledu karakteristika ploda. U cilju procene varijacije, izvršene su merenja u četiri populacije u okrugu Kastamonu za 14 razlicitih karakteristika ploda (broj matica po klasteru, dužina lešnika (mm), širina lešnika (mm), debljina lešnika (mm), debljina školjke (mm), velicina lešnika (mm), oblik lešnika, indeks kompresije, težina matice (g), dužina jezgra (mm), širina jezgra (mm), debljina jezgra (mm), težina jezgra (g) i odnos jezgra (%) na reprezentativnim uzorcima populacije. Značajne razlike su utvrdene medu populacijama u odnosu na sve karakteristike lešnika (p < 0,05). Prema klaster analizi cetiri populacije su stvorile dve grupe, populaciju Agli-Tunuslar i ostale. Najbliže populacije bile su Tosia-Kucuksekiler i Arac-Guzluk u pogledu karakteristika lešnika. Prema rezultatima dobijenim bilo na osnovu populacije ili bez diskriminacijepopulacije, utvrdene su znacajne korelacije izmedu većine osobina lešnika. Populacija Arac-Guzluk je imala najveće lešnike medu onima koji su ispitivani i to je populacija koja je imala najviše vrednosti u pogledu karakteristika velicine oraha dok je provincija Tosia-Kucuksekiler pokazala najviše vrednosti, sa prosecnim vrijednostima od 5, 15,92 mm, 1,32 i 11,75 mm respektivno za lešnike po klasteru, širinu lešnika, indeks kompresije i širinu jezgra. Populacija Agli-Tunuslar je pokazala najviši odnos jezgra sa 38,2%.