Total phenolics and antioxidant activity of jujube (Zizyphus jujube Mill.) genotypes selected from Turkey

We determined the total phenolic content and antioxidant activity of methanol extracts from fifteen selected jujube genotypes endogenous to the Mediterranean region of Turkey. Total phenolic content of the fruits was analyzed by Folin-Ciocalteu colorimetric method, while the total antioxidant activity was analyzed using the -carotene bleaching, ferric ion reducing antioxidant power (FRAP) and 2,2-diphenil-1-picrylhydrazyl radical scavenging capacity (DPPH) assays. The highest total phenolic content was observed in MHS 6 and MHS 7 genotypes (42 and 40 mg gallic acid equivalent (GAE) g -1 dry weight (DW)), while the lowest content was found in MHS 5 and MHS 14 (28 and 25 mg GAE g -1 DW). MHS 13 was among the genotypes with the highest antioxidant capacity in all three methods tested (1237 µmol g -1 in FRAP, 83% in -carotene bleaching method and 99% in DPPH). The present study demonstrates the potential value of jujube genotypes for pharmaceuticals and nutrition

Hatay ili değişik üretim merkezlerindeki zeytinlerin verimlilik durumları, fenolojik, morfolojik ve pomolojik özellikleri ile beslenme durumları üzerinde araştırmalar

TEZ3524Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 2000.Kaynakça (s. 180-194) var.xii, 194 s. ; brnk. res. ; 30 cm.

Değişik turunçgil anaçlarının marsh seedless ve redblush altıntop çeşitlerinin meyve verim ve kalitesi üzerine etkileri

TEZ1887Tez (Yüksek Lisans) -- Çukurova Üniversitesi, Adana, 1995.Kaynakça (s. 123-130) var.viii, 130 s. : rnk. res. ; 30 cm.

Farklı anaçlar üzerine aşılı bazı satsuma çeşitlerinin yapraklarında karbonhidrat fraksiyonlarının değişimi

The seasonal changes of carbohydrate content were monitored in the leaves of ‘Okitsu’, ‘Clausellina’, and ‘Silverhill’ satsuma cultivars budded on the sour orange (Citrus aurantium L. var. Yerli), Carrizo and Troyer citranges (Poncirus trifoliata Raf. x Citrus sinensis Osb. var. Troyer and Carrizo) during the 2010 and 2011 seasons. The seasonal changing trends of leaf soluble sugar contents of 3 satsuma cultivars budded on different rootstocks were similar. The sucrose was the most abundant soluble sugar. Carbohydrate contents had a maximum level at dormant period, and remained at low level during summer. In this period, the sharp decrease in leaf total carbohydrate concentration of ‘Okitsu’, ‘Clausellina’ and ‘Silverhill’ occurred in April with a rate of 27.9%, 22.6% and 21.0%, respectively. Accumulation of carbohydrate in leaves generally started after mid summer and continued until the end of year. The rootstocks were found to be not significant for total soluble sugar, starch and total carbohydrate concentration in most of the months. The cultivars had a significant effect on carbohydrate fractions of leaves compared to rootstocks. The scion-rootstock combination was significant on total carbohydrate concentration of leaves in all months investigated.2010 ve 2011 yıllarında ‘Okitsu’, ‘Clausellina’ ve ‘Silverhill’ satsuma çeşitlerinin yapraklarındaki karbonhidrat içeriklerinin mevsimsel değişimi üzerine Troyer ve Carrizo sitranjları (Poncirus trifoliata Raf. x Citrus sinensis Osb. var. Troyer ve Carrizo) ile Yerli turunç (Citrus aurantium L. var. “common”) anacının etkisi ortaya konmuştur. Farklı anaçlar üzerine aşılı 3 satsuma çeşidinin karbonhidrat içeriklerinin mevsimsel değişimi birbirlerine benzer olmuştur.Sakaroz yapraklarda en baskın indirgen şeker olarak belirlenmiştir. Yaprakların karbonhidrat içerikleri dinlenme döneminde maksimum seviyelerde iken, Yaz periyodunda düşük seviyelerde yer almıştır. ‘Okitsu’, ‘Clausellina’ ve ‘Silverhill’ çeşitlerinde yaprakların toplam karbonhidrat içerikleri nisan ayında çeşitlere göre sırasıyla % 27.9, % 22.6 ve % 21.0 oranlarında keskin bir azalma göstermiştir. Yapraklarda karbonhidrat birikimi genellikle yaz ortasından sonra başlamış ve bu durum yılsonuna kadar devam etmiştir. Anaçlar arasında toplam şeker, nişasta ve toplam karbonhidrat içeriğindeki farklılıklar çoğu aylarda istatistiksel olarak önemsiz bulunmuştur. Yapraklardaki karbonhidrat fraksiyonları üzerine çeşitlerin etkisi anaçlardan daha önemli olmuştur. Örnekleme yapılan tüm aylarda yapraklardaki toplam karbonhidrat içeriği üzerine anaç-kalem kombinasyonunun etkisi önemli bulunmuştur

Leaf Mineral Composition of Olive Varieties and Their Relation to Yield and Adaptation Ability

The amount of yield and adaptation of a cultivar to a new environment is strongly related to nutrient uptake ability. The aim of this study was to compare nutrient uptake ability of 21 local and/or standard olive varieties grown under Mediterranean climatic conditions. Elemental compositions of olive leaves were determined for two consecutive years. The highest yields were obtained from 'Gemlik', 'Manzanilla', 'Memecik', and 'Hojiblanca' varieties. Nitrogen (N), phosphorus (P), potassium (K), magnesium (Mg), and manganese (Mn) content of leaves were comparatively higher in the high-yielding year (2004) whereas iron (Fe) and copper (Cu) contents were lower. Nutrient uptake ability and usage efficiency of olive varieties were different. Mineral composition of leaves was variety dependent and different groups of varieties showed higher leaf concentration for each element. Therefore, it can be concluded that the variation in the nutrient uptake ability may be used as a criterion for adaptation of a variety to a new ecological environment

Determination of rootstocks characteristics of different persimmon species

Bu çalışmada farklı Trabzon hurması türlerinin çimlenme oranları, çöğür ve fidan gelişimleri belirlenmiştir. Tohumların çimlenme oranları Diospyros lotus türünde %67.2, Diospyros kaki türünde ise %66.5 olarak gerçekleşmiştir. Diospyros lotus anacının çapı ve bitki boyu Diospyros kaki anacına göre daha az olmuştur. En düşük aşı tutma oranı Hana Fuyu/ Diospyros lotus (%44,40) ve MKÜ Harbiye/ Diospyros lotus (%45,00) anaç-kalem kombinasyonlarından elde edilmiştir. En yüksek aşı tutma oranları ise MKÜ Harbiye/ Diospyros kaki (%70,00) anaç-kalem kombinasyonunda gerçekleşmiştir. Diospyros kaki anacı üzerindeki çeşitlerin fidan boylarının Diospyros lotus anacı üzerindekilere göre daha fazla olduğu saptanmıştır.In this study, the germination rate, nursery and seedling development of persimmon species were identified. Seed germination rate was 67.2% in Diospyros lotus and 66.5% in Diospyros kaki species. The rootstocks diameter and plant height of Diospyros lotus was less than that Diospyros kaki rootstocks. The lowest retention rate of grafting Hana Fuyu / Diospyros lotus (44.40%) and MKÜ Harbiye / Diospyros lotus (45.00%) took place in the rootstock-scion combinations. The highest retention rates grafting MKÜ Harbiye / Diospyros kaki (70.00%) on the rootstock-scion combinations. The size of nursery varieties on the Diospyros kaki rootstock was found to be higher than those on Diospyros lotus rootstocks

Determination of fruit and oil characteristics of olive (Olea europaea L. cv. 'Gemlik') in different irrigation and fertilization regimes

We evaluated plant growth, fruit and oil characteristics of olive (Olea europaea L. cv. 'Gemlik') grown on different fertilization and irrigation treatments. Irrigation regimes included rainfed-control (T-0), two treatments with 50% (T-50) of the full irrigation treatment (T-100) which received 100% class-A pan evaporation. Four fertilization treatments included unfertilized-control (F-0), traditional fertilization (F-1) and application of P and K during different growing stages (F-2-F-3). Experiments were conducted in each of three years considered as repeated units in a repeated measurement design. Fruit and total oil yields of olive increased about three times in highest irrigation and fertilization combination compared to rainfed and unfertilized treatments. The fruit and oil yield increased from 11.46 and 2.78 kg/tree (T0F0) to 30.07 and 7.12 kg/tree (T100F3), respectively. Mean fruit weight (from 2.87 to up to 4.24 g) and pulp stone ratio (from 3.68 to up to 5.60) also increased with additional water as P and K applied during flowering and endocarp hardening stages, respectively. Fertilization treatments had little effect on fatty acid compositions while additional irrigation resulted in increased palmitic and linoleic acid and decreased oleic acid content. Monounsaturated fatty acids/polyunsaturated fatty acids ratio was also decreased with irrigation supplements