Browsing by Author "Arpali, Digdem"

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Adaptive Lasso Analysis for Grain Yield and Yield Components in Two-Rowed Barley Under Rainfed Conditions
(Publ House Bulgarian Acad Sci, 2018) Akkol, Suna; Arpali, Digdem; Yagmur, Mehmet
The goal of this study was to determine the yield components related to grain yield in order to improve barley yield under rainfed conditions of Turkey (Van). Stepwise and Adaptive Lasso methods were performed for selection of most significant yield components. As cohesion criteria to compare Stepwise and Adaptive Lasso methods, the adjusted coefficient of determination and Akaike Information Criterion were used. Results revealed that when there were dependencies between independent variables stepwise and Adaptive Lasso achieved the same results. It has been determined that spike number per m(2) and grain weight per spike can be used as the most effective selection criteria for barley breeding studies due to their significant effects on grain yield.
The Effects of Sewage Sludge Application on Grain Yield and Nutrient Status of Grain in Triticale Under Rainfed Conditions
(Parlar Scientific Publications (p S P), 2016) Arpali, Digdem; Gulser, Fusun; Yagmur, Mehmet
Eight treatments were used to evaluate the effects of sewage sludge and mineral fertilizer on grain yield and some grain yield componnets, plant nutrient contents and heavy metal concentrations in triticale grain (cv Mikham 2001). The study was conducted using a completely randomized design with 3 replicates in dry conditions in Van, in the East Anatolia region of Turkey in winter cereal cropping season of 2009-2010. Sewage sludge was added to the soil 6 different rates of 5, 10, 15, 20, 25, 30 T ha(-1) and a single dose of nitrogen and phosphorus fertilizers like as standard dose (80 kg N ha(-1)+69 kg P ha(-1)). Moreover, control plot was not added any mineral fertilizer or sewage sludge. According to study results, the highest sewage sludge rate resulted in 99 % higher grain yield compared to control. Moreover the highest sewage sludge rate were obtained 20 % more grain yield than mineral fertilizer. The obtained results show that the grain triticale took distinctly more macroelements under the influence of sewage sludge in comparison with the control. Additionally grain mineral concentrations such as N, P, Mg, Zn, Fe were significantly affected with increasing of sewage sludge rates. In contrast, other nutrients (K, Mn, Al, Ni, Cu, Cd, Pb, Cr) was not affected significantly the increasing of sewage sludge rates. It is concluded that, 30 T ha(-1) sewage sludge rate could be substitute for commercial fertilizer for having optimum plant growth of triticale in marginal lands.
Effects of Zinc and Urea as Foliar Application on Nutritional Properties and Grain Yield in Barley (Hordeum Vulgare L-Cony Under Semi Arid Condition
(Parlar Scientific Publications (p S P), 2017) Yagmur, Mehmet; Arpali, Digdem; Gulser, Fusun
This current study was conducted to evaluate the effects of different rates of urea and zinc on grain yield and some important grain mineral contents in barley (Hordeum vulgare L. cony. Distichon cv. Tokak 157/37). The experimental design was a randomized complete block (RCB), arranged as split-plot with two doses of urea (0, 20 kg ha(-1)) (main plots) and five zinc doses (0, 0.5, 1.0, 2.0 and 4.0 kg ha(-1)) (subplots) with 3 replicates. The recorded agronomic parameters were grain yield (kg ha(-1)), plant height (cm), spike length (cm), seeds spikes(-1), 1000 kernel weight (g), seeds weight spike(-1) and grain mineral contents (N, P, Zn and Fe). When used solely, either urea or zinc significantly increased grain yield and all measured parameters. Besides, the use of the combined higher zinc doses with the urea (20 kg urea ha(-1)+4 kg Zn ha(-1), 20 kg urea ha(-1)+2 kg Zn ha(-1)) increased grain yield (3.49 t ha(-1) and 3.64 t ha-(1)). These yields were not statistically different between each other, suggesting that 20 kg urea ha(-1) + 2 kg Zn ha(-1) application dose would be sufficient for higher grain yield. Moreover, the foliar application of urea and zinc affected the protein content and grain mineral contents (N, Zn and Fe) when sprayed at boot stage of barley. To conclude, zinc & urea treatment via foliar will maintain better quality and higher quantity barley grains under under semi arid conditions.
Isolation and Characterization of Endophytic Bacteria From the Poaceae Family: Assessing Their Impact on Drought Stress and Plant Growth in Wheat
(Springer, 2025) Akkopru, Ahmet; Taskin, Bilgin; Arpali, Digdem; Ucar, Ceylan Pinar; Yardim, Dilek Ozcan; Ozturkci, Yusuf
Limited water resources and the increasing impact of global warming highlight the importance of endophytic bacteria (EB) given their unique tolerance to drought stress. In this study, we isolated EB from cultivated and wild Poaceae family members grown in arid or challenging environments in Lake Van Basin. We aimed to reveal plant growth promoting (PGP) characters in EB and to determine their potential to promote plant growth and reduce the effect of different drought levels in two different wheat cultivars (Tir (tolerant) and Bezostaja-1). 410 EB were isolated from 135 plants belonging to 19 taxa at different periods. In vitro tests revealed that 73.1% of the isolates can synthesize indole acetic acid (IAA), 34.4% can fix nitrogen, 37% can synthesize 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase (ACCd), 37.6% can solubilize phosphorus, and 93.9% can synthesize siderophore. IAA production and phosphorous solubility were the most common characters, coexisting in 59% of EBs. ACCd production, phosphorus solubilization, and nitrogen fixation were the most common features with a triple association of 0.49%. Although isolates selected according to EB characters showed differing effects on coleoptile, root and shoot length, germination percentage, shoot and root weight, and relative water content (RWC) in the early development period (EDP) of Bezostaja-1 cultivar under drought stress, some isolates had negative effects. However, Pseudomonas asturiensis G58S1, Pantoea agglomerans G129K1-1, Chryseobacterium rhizosphaerae G129S2, Acinetobacter calcoaceticus G118K1T, and Stenotrophomonas sp. G109K2-K isolates selected according to PGP trials and EDP results showed improved plant biomass, chlorophyll content, membrane permeability, germination power, and RCW, and protective effects against drought.
Recovering Wheat (Triticum Aestivum L.) To Intake Mineral Nutrient Components Under Drought Stress With Salicylic Acid
(Parlar Scientific Publications (p S P), 2016) Arpali, Digdem; Furan, M. Alp; Ozturkci, Yusuf
This research was conducted to determine the effect of changes of certain minerals (Ca, Mg, Mn, Fe, Cu, Zn) in salicylic acid doses on different wheat varieties (Dogu-88, Altay-2000, Bezostaya-1, Alparslan and Tir mixed population) in drought stress. Drought was created in plants by irrigating 40% of field capacity. It was found that plants were differently responding to drought of mineral accumulation. 1 mM kg-1 dose of salicylic acid, compared to 0.1 mM kg-1 dose significantly increased the mineral content in flag leaf of all varieties to be statistically. The increase was found to be highest in Bezostaya 1 and Altay-2000 varieties. This research has shown that mineral contents are significantly decreased with the drought in wheat varieties, and it was concluded that salicylic acid treatment affected to all varieties positively although this effect is different according to the varieties.
Search for the New Genetic Resources Against To Drought
(Parlar Scientific Publications (p S P), 2016) Furan, M. Alp; Arpali, Digdem
The main purpose of plant breeders is to develop efficient genotypes that are high and stable under drought stress. Tir wheat (Triticum aestivum L. ssp vulgare Vill. v. leucospermum Korn) is mostly of a mixed population and it grows rapidly after germination, which minimizes yield losses caused by late planting. Because it has a long coleoptile it is capable of germinating from 12 to 15cm deep cultivation. In the study, some of bread wheat varieties and Tir genotypes were compared at three different levels of osmotic pressure and classified with SSR markers according to the coleoptile length, as well as the germination percentage of the fourth and eighth days and relative water content, root length, shoots length, and fresh weight. The aboveground and underground dry weights were also tested for differences. When considered from this perspective, in arid conditions there is an important relationship between coleoptile length and the drought resistance index and that can be used in the evaluation of drought resistance. Thus, Tir wheat should be given priority in the breeding programs against drought resistance. Tir wheat, with its long coleoptile feature, shows tolerance against drought; it should take place in breeding programs with its genetic values.