Browsing by Author "Sefaoglu, F."
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Web of Science Effects of titanium dioxide nanoparticles against salt and heat stress in safflower cultivars(2024.01.01) Dinler, B.S.; Cetinkaya, H.; Koc, F.N.; Gül, V.; Sefaoglu, F.This study aimed to determine the effects of titanium dioxide nanoparticle (TiO2NP) pretreatment on seeds of different safflower cultivars (Balci, Dincer) under salt and heat stresses. The apparent effects on stress markers (malondialdehyde (MDA), hydrogen peroxide (H2O2) and superoxide radical (O2 center dot-) content), as well as changes in germination and physiological parameters (radicle and plumula weight and length measurements), were investigated. TiO2NP pretreatment caused an increase in radicle length and plumula fresh weight for the Balci cultivar under salinity. Furthermore, plumula dry weight was alleviated with TiO2NP pretreatment for both cultivars. TiO2NP pretreatment improved plumula dry and fresh weights for both cultivars under heat stress. In addition, MDA content decreased for both cultivars under heat stress but only for Balci under salt stress. The amount of O2 center dot- radicals positively affected only the radicle for both cultivars under heat stress. This study is the first to document the alleviation of salt stress damage for the Balci safflower cultivar, and protection for both Balci and Dincer cultivars under heat stress, using 200 ppm TiO2NP pretreatment.Web of Science EVALUATION OF YIELD AND QUALITY CHARACTERISTICS OF OIL SUNFLOWER (Helianthus annuus L.) VARIETIES CULTIVATED IN SEMI-ARID IRRIGATED CONDITIONS IN THE NORTHEAST OF TURKEY(2023.01.01) Gul, V.; Gidik, B.; Sefaoglu, F.Sunflower, an oil plant grown in many parts of the world, is capable of growing in many different climatic conditions. It is of great importance to carry out studies on the adaptation of new varieties and to determine the varieties suitable to the ecology of the region in areas where sunflower cultivation is intense. This study was carried out to determine yield and quality characteristics of some sunflower cultivars (SANBROMR, P63LE113, 11TR077, ESNIEGARA, ADELYA, and DERAY) under Bayburt providence conditions of Turkey in 2020-2021. It has been determined that there are significant differences between the cultivars for the traits examined. The highest average seed yield (4194.2 kg ha-1) and average linoleic acid content (65.09%) were found for BOSFORA. The highest average oil content ESNIEGARA (48.78%) and average oil yield respectively were obtained from ESNIEGARA (186.02 kg ha-1) and BOSFORA (182.93 kg ha-1) varieties and the highest average oleic acid content was obtained from 11TR077 variety (41.78%). The results of this study emphasized the importance of varieties in sunflower growing. BOSFORA and ESNIEGARA varieties had high yield and quality characteristics in the ecologies of a semi-arid climateWeb of Science Investigation on the genotype and environmental relationships on yield and its components in sunflower (Helianthus annuus L.) in eastern region of Turkiye(2023.01.01) Sefaoglu, F.Since sunflower oil is popular cooking oil around the world, the demand for sunflower oil has been increasing recently. The investigation wsas carried out to study the interaction of diverse cultivars with environmental factors on sunflowers' yield components (Helianthus annuus L.). The seed yield and its components significantly varied depending on the variety and location. The maximum seed yield (3700.5 kg ha(-1)) was recorded from Erzurum region in Bosfora cultivar while the minimum seed yield (3450.8 kg ha(-1)) was obtained from Igdir region in Tunca cultivar. Correspondingly Tunca gave a maximum (1620.0 kg ha(-1)) oil yield in Igdir region and a minimum (1550.6 kg ha(-1)) oil yield in Erzurum region. Correlations among seed yield and plant height, head diameter, 1000-seed weight, hectoliter weight, oil concentration and oil yield also showed differences with regards to statistical significance and value at both locations as per the environmental conditions that influenced the individual traits. The results suggested the selection of suitable genotypes must consider the type of soil, local climate, and environmental conditions, which play an important role in oil concentration and seed yield of sunflower. The identified genotypes with high yield and oil content could be used in a breeding programme for the enhancement of genetic potential in sunflowers.