2020 Cilt 34 Sayı 2

Permanent URI for this collectionhttps://hdl.handle.net/11452/14504

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    Evaluation of nineteen potato cultivars for salt tolerance and determination of reliable parameters in tolerance
    (Bursa Uludağ Üniversitesi, 2020-10-01) Aydoğan, Çiğdem; Turhan, Ece
    This investigation was aimed to explore the varietal differences in salinity tolerance of potato (Solanum tuberosum L.) plants by linking the overall salinity tolerance with changes in different morphological and physiological characteristics. Nineteen currently used potato cultivars were grown under controlled conditions in greenhouse at 25-18 (±2) °C (day/night), 70% relative humidity under non-saline and 5dS m-1 NaCl conditions for 90 days. For this purpose, tubers were planted in 14L pots, containing soil: peat: vermiculite (3:1:1). Salt treatment was started 1 week after all the seedlings where emerged. Salt stress tolerance of potato plants were determined with visual damage scale, cell membrane injury analysis and malondialdehyde (MDA) content, the indicator of lipid peroxidation. Leaf relative water content (RWC), loss of turgidity (LT) and total soluble protein (TSP) content were also examined. In addition, the protein profiles of leaf tissues of plants were evaluated by SDS-PAGE. In conclusion; among 19 potato cultivars evaluated cvs. Bettina, Challenger, Granola, Lady Claire, Musica and Orchestra were the most susceptible, cvs. Desiree and Russet Burbank were the most tolerant to salt stress. The data indicated that the low cell membrane injury and MDA content made cvs. Desiree and Russet Burbank relatively salt-tolerant cultivars. Besides, it is concluded that, visual damage scale and SDSPAGE protein profiles also could be used as biomarkers in salt stress tolerance of potato cultivars.
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    The evulation of stress related gene expression level and relationship to cellular H2O2 in chickpea (cicer arietinum l.) under copper stress
    (Bursa Uludağ Üniversitesi, 2020-08-26) Kar, Musa; Öztürk, Nuriye
    The aim of this study is to determine the changes in expression levels of stress genes in chickpea (Cicer arietinum) plant leaves exposed to copper (Cu) at different times and concentrations. Also; the relationship between the changes in gene expression and cellular H2O2 was investigated. In this context, the amount of malondialdehyde (MDA) and reactive oxygen species (ROS) hydrogen peroxide (H2O2) levels were determined. Furthermore, the changes in gene expressions of Metallothionein (MT), Catalase (CAT) and superoxide dismutase (Cu / Zn-SOD) enzymes were determined based on the actin expression level that selected as a housekeeping gene. It was determined that MDA content increased significantly due to time and concentration, In all duration and concentrations, the expression of stress-related genes significantly differed from the control group. Hleowever, a decrease has been determined by all gene expressions after the highest expression. This phenomenon is associated with cellular H2O2, which shows a steady increase in stress. At the end of the study, it was concluded that the elevating duration and concentration of Cu induced oxidative stress and caused the expression of stress-related genes. Furthermore, cellular H2O2 might be acting as a signal molecule that, up-regulate gene expressions until a certain concentration and down-regulate until a certain concentration. Thanks to the results of this study; Plants in agricultural areas can be exposed to a certain concentration of H2O2 to provide an earlier response to oxidative stress against biotic or abiotic stresses. In this way, the use of chemical pesticides can be minimized due to obtaining more durable products.
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    Technical and economic analysis of the use of wind energy for water extraction: Karacabey example
    (Bursa Uludağ Üniversitesi, 2020-06-09) Bölükbaş, Erkan; Biçen, Tuğba; Vardar, Ali; Bursa Uludağ Üniversitesi/Fen-Edebiyat Fakültesi.; Uludağ Üniversitesi/Ziraat Fakültesi.; 0000-0001-6349-9687; 0000-0003-4004-7623; 0000-0001-6826-2494
    One of the problems that occur with the increase of the world population is the limited energy resources. The rapid depletion of fossil resources and increasing energy consumption have led human beings to explore new sources of energy. In the 21st century, the greatest alternative to fossil resources was renewable energy sources. One of the areas where energy needs are technically and economically important is agricultural activities. Renewable energy sources have been used for many years to meet the energy requirements for agricultural activities such as grinding of grains and water extraction from wells. One of these sources is wind energy. In this study, it is aimed to determine the cost and availability of the energy needed for the removal of groundwater to the surface for use in agricultural irrigation in Bursa/Karacabey region in Turkey by using wind turbines. Study; using the data measured at the meteorological station Karacabey wind speed; 300, 600, 900, 1500 kW wind turbines and the use of power and energy that can be obtained in the case of submersible pumps with some selected values of availability, the cost and amount of water that can be pumped for the analysis are reviewed. As a result of the study, it was determined that the energy to be used to supply groundwater with submersible pumps in Karacabey region can be supplied from wind energy and this situation is quite economical compared to using mains electricity.