Showing 5 results for Dursun
Volume 21, Issue 5 (9-2019)
Abstract
Use of fertilizers is important in agricultural production. In particular, it is more focused on organic fertilizer that increases yield and quality of crops and is not harmful to environment at the same time. In this study, the effect of bacterial biofertilizers on yield and some quality parameters were analyzed in two tomato cultivars (Solanum lycopersicum L., cv. Cevahir F1 and Pala F1) in greenhouse conditions. Three different concentrations (1, 3, and 5 gL-1 and control i.e. un-inoculated) and two different bacterial fertilizers including A: Azotobacter spp. (1×109 CFU), and B: mixture of Bacillus subtilis and Bacillus megatarium (1×109 UFC) were evaluated in a completely randomized design with 3 replications. The treatments were applied one week after planting of the seedlings. The solutions were given to the root zone of the plant and repeated 3 times at intervals of 10 days. Average fruit weight, fruit number per plant, fruit weight per plant, plant height, fruit width and length, total soluble solid, pH, ascorbic acid, chlorophyll content, dry matter yield and mineral content were evaluated on tomato. The effects of treatments were found significant on plant growth parameters. Bacterial fertilization increased yield and other parameters in all treatments. Besides, the effects of treatments were significant on mineral content of tomato fruits.
Volume 22, Issue 3 (4-2020)
Abstract
This study was carried out to determine the effects of different PGPR formulations, chemical fertilizers, and their combinations on some color characteristics and nutrient content of bract leaf of two cultivars of Euphorbia pulcherrima Willd. ex Klotzsch in a research greenhouse between July 2015 and July 2017. The treatments included bacterial formulations: (1) BI: Paenibacillus polymyxa TV-12E+Pseudomonas putida TV-42A+Pantoea agglomerans RK-79, (2) BII: Bacillus megaterium TV-91C+Pantoea agglomerans RK-92+Bacillus subtilis TV-17C, (3) BIII: Bacillus megaterium TV-91C+Pantoea agglomerans RK-92+Kluyvera cryocrescens TV-113C, and (4) BIV: Bacillus megaterium TV-91C+Pantoea agglomerans RK-79+Bacillus megaterium TV-6D). Also, fertilizer treatments included the full amount of commonly used Chemical Fertilizer (CF= 150 g 100 L-1) and combination of the reduced amount of chemical fertilizer by 50% with each bacterial formulation, and control. The first red leaves, life of bracts, color properties (L, a* and b*), content of anthocyanin, chlorophyll content in green leaf, macro and micronutrient contents of bracts were evaluated in the experiment. CF and BII+50%CF applications encouraged the coloring of bract leaves early (4.01%). It was determined that CF (7.76%), BI+50%CF (6.03%) and BII+50%CF (5.27%) applications significantly increased chlorophyll content of poinsettia bract when compared to the control. Darker colored bracts were obtained from BI and BIV applications compared to the control. The highest total nitrogen amount (3.69%), soluble phosphorus (4,285.33 mg kg-1), potassium (28,132.45 mg kg-1) and calcium (8,299.03 mg kg-1) amount were found in the BII+50%CF application. It was determined that bacterial formulations BI, BIV, BIV+50%CF and BII+50%CF had positive effects on some plant aesthetic, quality characteristics, and nutrient content of bract of poinsettia and can be used in poinsettia production stage as one of the biological products. Thus, bacterial formulations may replace or reduce use of chemical fertilizers in poinsettia production.
Volume 22, Issue 4 (6-2020)
Abstract
To extend the genetic base of Iranian tomato germplasm, 93 landraces were collected from the northwest of Iran and East Anatolian of Turkey, along with three commercial cultivars, and their genetic structure were studied using 39 SSR primers. Thirty-five polymorphic SSR loci generated a total of 118 alleles in the studied germplasm. Number of alleles per locus and effective number of alleles averaged 3.37 and 2.47, respectively. Expected heterozygosity of SSRs varied from 0.227 (TMS24) to 0.773 (LEta016), averaged 0.558. The mean number of alleles per genomic-SSRs (3.61) was more than that of EST-SSRs (2.66). Cluster analysis using Neighbour Joining (NJ) method placed 96 tomato genotypes in eight groups. Little congruence was found between NJ dendrogram and geographical distances. Genetic structure analysis of the germplasm using Bayesian method revealed two sub-populations and separated cherry tomatoes from the other landraces and commercial cultivars. Out of the 21 morphological characters, significant (P≤ 0.05) marker-trait associations were found for 18 characters. Each of SSR loci TC11, TC948, and Tom236-237 was associated with three characters. The genetic variability, structure, and markers associated with the studied traits in the current study can be used for planning tomato breeding programs and future studies.
Volume 25, Issue 3 (5-2023)
Abstract
Despite the developing technology, extraction of Sulfured Dried Apricot (Prunus armeniaca) (SDA) stones is still done manually and thus requires a significant amount of labor and time and also causes serious problems in terms of hygiene. According to International Food Standards (CXS 130-1981) and Turkish Standard 485, the SDA stones must be extracted from the peduncle side of the apricot. Therefore, the correct position of the apricot peduncle and style side must be determined. In this study, a deep learning architecture was improved for the first time to determine the position of SDA stones as a component of the agricultural machine developed to extract SDA stones. In this study, a new Capsule Network architecture was used. With the original capsule network, SDA images were classified with 86.23% accuracy, while it increased to 94.47%with the improved capsule network. Also, the processing time of the developed network architecture was about twice as fast as the original. The result clearly demonstrates that the SDA stone positions are easily determined. Therefore, the designed agricultural machine can extract the SDA stones hygienically and rapidly, without any need for human power.
Volume 25, Issue 5 (9-2023)
Abstract
Nowadays, there is considerable interest in plants such as hawthorn that have a rich source of secondary metabolites (volatile and phenolic compounds) in their leaves, with beneficial effects on health. This study investigated the Volatile Compounds (VCs), total phenolic content, and antioxidant activities of Sultan hawthorn leaves collected at three different times based on fruit maturity stages (immature, mature, and over-mature). Our main goal was to determine whether the volatile profile, total phenolic content, and antioxidant activity would change depending on the leaf collection time. A total of 78 VCs were identified in the leaves, 11 of which were for the first time. With the progress in fruit maturity, the levels of most VCs varied, the phenolic content and antioxidant activity increased, and acidity decreased. Benzaldehyde and α-farnesene were the principal VCs accounting for 61% of total VCs identified in leaf at the overmature stage. The principal component analysis successfully separated volatile compounds in hawthorn leaves along the fruit maturity stages. For the first time, the present study provided a general overview of the secondary metabolites in leaves from Sultan hawthorn cultivar along fruit maturity stages. The hawthorn leaf collected at the overmature fruit stage proved to have high potential in secondary metabolites and antioxidant capacity.
