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    Color and Antioxidant Characteristics of Some Fresh Fig (Ficus carica L.) Genotypes from Northeastern Turkey
    (Springer, 2012) Ercisli, Sezai; Tosun, Murat; Karlidag, Huseyin; Dzubur, Ahmed; Hadziabulic, Semina; Aliman, Yasmina
    Fruit skin color, total phenolics, total anthocyanins, soluble solids content, titratable acidity and total antioxidant capacity in fresh fruits of a number of local and well-known fig (Ficus carica L.) genotypes and cultivars grown in northeastern Turkey were determined. TEAC (Trolox equivalent antioxidant capacity) and FRAP (ferric reducing antioxidant power) assays were used to determine total antioxidant capacity. Fruit skin color of genotypes were found to be very diverse, i.e., light green, light purple, purple, dark purple and black. The content of total phenolics, soluble solids content (SSC) and titratable acidity greatly varied in the range from 24 to 237 mg of gallic acid equivalent per 100 g fresh weight, 18.60 to 26.30 % and 0.16 to 0.47 % in local genotypes and studied cultivars. In general, total antioxidant capacities determined by two methods expressed higher values in the local fig genotypes compared with the cultivars. The results suggested that genotype is the main factor that determines difference in the composition of bioactive compounds in figs and provide information on putative health benefits locally grown genotypes.
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    The effects of autumn foliar applications of boron and urea on flower quality, yield, boron and nitrogen reserves of apricot
    (Taylor & Francis Inc, 2017) Karlidag, Huseyin; Esitken, Ahmet; Turan, Metin; Atay, Salih
    In order to determine the effects of autumn foliar application of boron (B) and/or urea on abortive flower ratio, yield, fruit weight, total soluble solid (TSS) and B and nitrogen (N) contents of reserves of non-irrigated apricot trees, field experiments were carried out between 2009 and 2012 in Malatya province of Turkey. The application of B and/or urea stimulated perfect flower development, B and N accumulation and resulted in significant yield increase. Boron, urea and B+urea applications increased fruit yield by 33.1%, 26.1% and 26.9%, decreased abortive flower ratio by 34.6%, 27.1% and 35.9% compared to the control, respectively. In addition, B and N contents of wood, bark and buds of apricot trees were significantly increased by B and/or urea treatments. It was also observed that B and N contents were the highest in bud compared to wood and bark in all treatments. The highest B (16.53 ppm) and N (1.56%) contents were determined to buds in B+urea treatment. The results of this study suggest that autumn foliar B and/or urea application have the potential to decrease abortive flower ratio and increase the yield and B and N contents of reserves of apricot trees under non-irrigated conditions.
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    Effects of grafting height of MM106 rootstock on growth, lateral shoot formation and yield in apple trees
    (Taylor & Francis Ltd, 2012) Karlidag, Huseyin; Esitken, Ahmet
    Between 2004 and 2008, the effects of different grafting heights on sylleptic shoots were tested in the apple (Malus x domestica Borkh.) cultivars 'Granny Smith' and 'Gloster', and cumulative fruit yields were evaluated. MM106 apple rootstocks were grafted 10, 20, 40, or 60 cm above soil level in August 2004. The results showed that an increased grafting height significantly decreased tree height in both cultivars. The tallest and shortest trees were observed at grafting heights of 10 cm (153.0 and 170.0 cm) and 60 cm (141.3 and 143.5 cm) in 'Granny Smith' and 'Gloster', respectively. Among the various grafting heights tested, 60 cm in 'Granny Smith' and 20 cm in 'Gloster' gave the largest stem diameters (17.6 mm and 16.8 mm, respectively). The number of lateral shoots increased significantly with increased grafting height in both cultivars. The largest numbers of lateral shoots in 'Granny Smith' (10.75) and 'Gloster' (2.00) were obtained from a grafting height of 60 cm, while 2.55 and zero lateral shoots occurred at 10 cm grafting height in 'Granny Smith' and 'Gloster', respectively. Shoot lengths decreased significantly by increasing the grafting height. Grafting heights of 10 cm and 60 cm resulted in the tallest and shortest shoots in both cultivars. Cumulative fruit yields were significantly affected by grafting height in both cultivars. The highest yield was found for a 60 cm grafting height in both 'Granny Smith' (11.295 kg tree(-1)) and 'Gloster' (4.818 kg tree(-1)). The results of this study suggest that grafting heights of 40 cm and 60 cm have the potential to promote branching and early bearing for apple fruit production in sustainable and organic agricultural systems.
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    Effects of Interstock (M9) Length Grafted onto MM106 Rootstock on Sylleptic Shoot Formation, Growth and Yield in Some Apple Cultivars
    (Galenos Publ House, 2014) Karlidag, Huseyin; Aslantas, Rafet; Esitken, Ahmet
    In this study, branching effects of interstock lengths (15 and 30 cm) of M9 on MM106 rootstock were tested on Golden Delicious and Granny Smith cultivars. In addition, vegetative growth and cumulative yield were determined between 2003 and 2010. The results showed that increased interstock length significantly decreased sapling and tree growth but increased lateral branching in both cultivars. The tallest trees were in the control (176.5 and 186.5 cm) and the shortest trees were in the 30 cm interstock length (147.5 and 162.6 cm) in Golden Delicious and Granny Smith, respectively. The highest number of lateral shoot was obtained from 30 cm interstock length in Golden Delicious (3.67) and Granny Smith (5.33) while there was no lateral shoot formation in the control. The highest cumulative yield was obtained from 30 cm interstock length as 21.77 kg tree(-1) in Golden Delicious and 19.18 kg tree(-1) in Granny Smith. The results suggested that M9 as a interstock have the potential to induce growth reduction, branching and early fruit bearing especially in sustainable and organic fruit production systems in apple.
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    Growth, Nutrient Uptake, and Yield Promotion of Broccoli by Plant Growth Promoting Rhizobacteria with Manure
    (Amer Soc Horticultural Science, 2011) Yildirim, Ertan; Karlidag, Huseyin; Turan, Metin; Dursun, Atilla; Goktepe, Fahrettin
    This study was conducted to investigate the effects of root inoculations with Bacillus cereus (N-2-fixing), Brevibacillus reuszeri (P-solubilizing), and Rhizobium rubi (both N-2-fixing and P-solubilizing) on plant growth, nutrient uptake, and yield of broccoli in comparison with manure (control) and mineral fertilizer application under field conditions in 2009 and 2010. Bacterial inoculations with manure compared with control significantly increased yield, plant weight, head diameter, chlorophyll content, nitrogen (N), potassium (K), calcium (Ca), sulfur (S), phosphorus (P), magnesium (Mg), iron (Fe), manganese (Mn), zinc (Zn), and copper (Cu) content of broccoli. The lowest yield per plant, plant weight, steam diameter, and chlorophyll content were recorded in the control, but the manure with Bacillus cereus (BC), Rhizobium rubi (RR), and Brevibacillus reuszeri (BR) inoculations increased yield 17.0%, 20.2%, and 24.3% and chlorophyll content by 14.7%, 14.0%, and 13.7% over control, respectively. Bacterial inoculations with manure significantly increased uptake of macronutrients and micronutrients by broccoli. In conclusion, seedling inoculation with BR and especially RR may partially substitute costly synthetic fertilizers in broccoli.
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    Plant Growth-promoting Rhizobacteria Mitigate Deleterious Effects of Salt Stress on Strawberry Plants (Fragaria xananassa)
    (Amer Soc Horticultural Science, 2013) Karlidag, Huseyin; Yildirim, Ertan; Turan, Metin; Pehluvan, Mucahit; Donmez, Figen
    The effect of selected plant growth-promoting rhizobacteria (PGPR) on the growth, chlorophyll content, nutrient element content, and yield of strawberry plants under natural field salinity conditions stress was investigated. Field experiments were conducted using a randomized complete block design with five PGPRs (Bacillus subtilis EY2, Bacillus atrophaeus EY6, Bacillus spharicus GC subgroup B EY30, Staphylococcus kloosii EY37, and Kocuria erythromyxa EY43) and a control (no PGPR) in 2009 and 2010. PGPR inoculations significantly increased the growth, chlorophyll content, nutrient element content, and yield of strawberry plants. PGPR treatments lowered electrolyte leakage of plants under saline conditions. The leaf relative water content (LRWC) of plants rose with bacterial inoculation. All nutrient element contents of leaves and roots investigated were significantly increased with PGPR inoculations with the exception of sodium (Na) and chlorine (Cl). The highest efficiency to alleviate salinity stress on the yield and nutrient uptake of strawberry plants was obtained from EY43 (228 g per plant) and EY37 (225 g per plant) treatment and the yield increasing ratio of plants was 48% for EY43 and 46% for EY 37 compared with the control treatment (154 g per plant). The highest nitrogen (N), potassium (K), phosphorus (P), calcium (Ca), magnesium (Mg), sulfur (S), manganese (Mn), copper (Cu), and iron (Fe) concentrations were obtained from EY43 and followed by E6, E37, and E30, and increasing ratio of leaves and root N, P, K, Ca, Mg, S, Mn, Cu, and Fe contents were 22% to 33%, 34% to 8.8%, 89% to 11%, 11.0% to 7.2%, 5.1% to 6.2%, 97% to 65%, 120% to 140%, 300% to 15%, and 111% to 9.0%, respectively. The results of the study suggested that PGPR inoculations could alleviate the deleterious effects of salt stress conditions on the growth and yield of strawberry plants under salinity conditions.
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    Role of 24-epibrassinolide in mitigating the adverse effects of salt stress on stomatal conductance, membrane permeability, and leaf water content, ionic composition in salt stressed strawberry (Fragaria x ananassa)
    (Elsevier, 2011) Karlidag, Huseyin; Yildirim, Ertan; Turan, Metin
    In order to study the effect of brassinosteroids on the amelioration of the inhibitory effect of salinity on strawberry plants, a short-term experiment was conducted in greenhouse to test different concentrations of 24-epibrassinolide (24-EBL) (0.0, 0.5, and 1 mu M) by foliar application on some agro-physiological properties, such as shoot dry weight, and root dry weight, stomatal conductance (SC), leaf relative water content (LRWC), leaf chlorophyll reading values (LCRV) and membrane permeability (MP) of strawberry 'Fern' and 'A6' cultivars irrigated with salt water (35 mM NaCl). 24-EBL solutions were applied twice during late afternoon hours with 7d intervals using a hand-held sprayer. Plant shoot dry weight, root dry weight, SC, LRWC and LCRV were reduced by 29-33%, 45-15%, 71-55%. 11-13%, and 12-13% for 'A6' and 'Fern' cultivars at 35 mM (without 24-EBL applied), respectively, as compared to the nonsaline treatment, but MP increased 40% and 12%. An exogenous supply of 24-EBL was found to be successful in alleviating of the inhibitory effects of salt stress on plant growth parameters and nutrient contents. 24-EBL (1 mu M) application under saline condition significantly increased shoot and root dry matter, SC, LRWC and LCRV of plants, and alleviation effects of 1 mu M 24-EBL application was 20%, 15%, 122%, 5.8%, and 10.9% for 'A6' and 47%, 8.0%, 83%, 33.3% and 6.0% for 'Fern' cultivars, respectively. Macro-micro element content of plant leaf and root increased with increase 24-EBL except for Na under salinity stress. These results support the view that supplementary 24-EBL application can overcome the effects of salinity stress on plant growth and growth parameter under saline conditions. (C) 2011 Elsevier B.V. All rights reserved.
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    SALT TOLERANCE OF PHYSALIS DURING GERMINATION AND SEEDLING GROWTH
    (Pakistan Botanical Soc, 2011) Yildirim, Ertan; Karlidag, Huseyin; Dursun, Atilla
    The study was conducted to evaluate the effect of NaCl salinity on germination and emergence of Physalis ixocarpa and Physalis peruviana. Seeds UP. ixocarpa and P. peruviana were germinated by the use of 0, 30, 60, 90, 120 and 130 mM NaCl solutions in petri dishes. Final germination percentage (FGP) decreased with the increase in NaCl concentration. Both species germinated at the ranges of salinity. P. peruviana gave the greater germination percentages under salt stress than P. ixocarpa. NaCl salinity at different concentrations adversely affected germination rates. For seedling growth, seeds of both species were sown at 10 mm depth in plastic trays filled with peat to determine final emergence percentage (MP). The trays were irrigated manually to saturation every day with 0, 30, 60, 90, 120, 150 or 180 mM NaCl solutions to maintain the level of salinity. Salinity affected seed emergence and seedlings growth more than seed germination. The study showed that no emergence of Physalis was observed at 90, 120 and 180 mM NaCl salinity. Fresh and dry weights of normal seedlings were also evaluated. Salt stress significantly decreased the plant fresh and dry weight of both species. Based on the results of the experiment, it can be concluded that seedling emergence and growth is more sensitive to salt stress than seed germination in Physalis.