Ereğli Tarım Bilimleri Dergisi Archive

Purpose: The study was carried out to reveal the effects of different electric current (DC) applications on plant growth in spinach.

Method: In the research carried out as a pot experiment, different direct electric current (DC) applications (0, 2, 4 and 8 volts) and Matador, Acosta, Revere F1 and Rembrandt F1 spinach (Spinacia oleracea L.) varieties were used as plant materials. At the end of the experiment, germination rate and percentage, plant height, root length, stem diameter, number of leaves, leaf area, leaf fresh and dry weights, root fresh and dry weights, chlorophyll amount (SPAD value), lipid peroxidation product malondialdehyde (MDA) and enzyme activities (superoksit dismutaz (SOD), katalaz (CAT) and askorbat peroksidaz (APX)), were determined; and macro-micro nutrient elements in the leaf [phosphorus (P), potassium (K), magnesium (Mg), calcium (Ca), sodium (Na), iron (Fe), manganese (Mn), copper (Cu) and zinc (Zn) were analyzed.

Results: Of the DC electrical applications, it was determined that 2 and 4 volt applications generally increased the nutrient content of spinach; and in the variety-electricity interaction, 2 volt application and Rembrandt F1 and Matador varieties came to the fore. It was determined that 8 volt electricity application was prominent in APX and SOD enzyme activities in Rembrandt F1 variety, while 2 volt electrical application was prominent for CAT enzyme activity and in MDA enzyme activities. As a result, it was concluded that electrical applications had positive effects on plant growth and could be used as an alternative for plant growth.

Conclusions and Suggestions: As a result, it was determined that some electrical applications had usually positive effects on some plant growth parameters in some spinach cultivars.

Tomato spotted wilt virus (TSWV) is a viral disease agent that limits pepper production and causes economic losses in the world. The gene controlling resistance to TSWV (Tsw) has been detected in many Capsicum chinense pepper genotypes ('PI 152225', 'PI 159236', 'CNPH 275''C00943', and '7204') and mapped on chromosome 10 it has been mapped to cultivars (Capsicum annum). Although the homolog of Sw-5 could not be mapped, phenotypically similar genes are present in tomatoes, with many Sw5 homologs found in similar regions in tomatoes and pepper. The relationship between Tsw and Sw5 has been studied through genetic studies of TSWV. The most effective and environmentally friendly way to combat this viral pathogen is to use resistant varieties. Our study investigated the resistance levels of 40 genotypes at S3 stage against tomato spotted wilt virus (TSWV) investigated. SCAR marker was used in molecular studies. Genotypes were determined as 5 homozygous resistant (RR), 15 sensitive (rr), and 20 heterozygous resistants (Rr).

This study is to evaluate effects of polyethylene glycol (PEG-6000) on germination and seedling growth parameters and determine the optimal dose which can be used in Kirik wheat (Triticum aestivum L.) mutation breeding programs. In this study, 11 different PEG-6000 application doses [0 (control), -1, -2, -3, -4, -5, -6, -7, -8, -9 and -10 bar] were applied as randomized designs. Germination percentage (GP), mean germination time (MGT), root (RL) and shoot length (SL) were measured. Analysis of variance indicated that different concentration of PEG-6000 was significant (P <0.01) in GP, MGT, RL and SL parameters. The highest GP, RL and SL were obtained at control concentration, whereas; the highest MGT was observed at high -10 bar concentration. As the concentration of PEG-6000 increased, the germination percentage, root length and shoot length decreased significantly, while the mean germination time was prolonged. Based on the data obtained, it was concluded that an effective selection could be achieved at a concentration of -10 bar and this osmotic potential, was used to select the drought tolerant during the germination period.

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This research was carried out in order to determine the agronomic components related to fresh cob and green matter yield of sweet corn cultivars in Karapınar ecological conditions in 2021. 13 sweet corn varieties were used in the study. The research was carried out in a randomized block design with three replications. In the study, fresh ear yields, marketable ear yields and green matter yield yield characteristics of all cultivars were investigated.

As a result of the research, the average fresh ear yield of the cultivars was obtained as 1583 kg/da, the highest fresh ear yield values ​​were determined in Vega (1729 kg/da) variety and the lowest value was determined in Yummy (1511 kg/da) variety on the basis of cultivars. Among the sweet corn varieties, the highest marketable ear yield was Vega (1600 kg/da), while the lowest value was found in Caremelo (1231 kg/da). The green matter yield values ​​of the varieties examined in the research varied between 1352 kg/da (Khan) – 1100 kg/da (Adapare).

As a result of the study, it was concluded that the Central Anatolian conditions, including the Karapınar district, are very suitable for sugar corn cultivation and the selection of varieties in cultivation is very important in terms of marketable ear yield, Vega and Khan varieties are the prominent varieties for the region.