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    Effects of different aspects and harvest times on essential oil ratio and components of wild thyme (Thymbra spicata L. var. spicata)
    (Parlar Scientific Publications, 2020) Aslan, Emine; Arslan, Dogan
    The study was carried out to determine the quality characteristics of Thymbra spicata L. var. spicata which has a natural distribution in the flora of Siirt province, Turkey. The dried leaves and flowers of Thymbra spicata L. var. spicata, which is used in folk medicine in Anatolia, are consumed as spices and tea, and young shoots are used as salads. The essential oil content of the plant varies between 0.5 and 3.4%. A significant portion of essential oil in Thymbra spicata L. var. spicata is composed of carvacrol. In this study, essential oil ratio and essential oil components of Thymbra spicata L. var. spicata collected from different aspects (north, south, east, west) and at different harvest times (pre-flowering, full flowering and post-flowering) were determined. The samplings were carried out according to the split plots into randomized blocks experimental design with 4 replications. The results showed that essential oil ratio varied between 2.13 and 3.15%. The highest essential oil ratio (3.15%) was obtained from the west aspect during the full flowering period, while the lowest essential oil ratio (2.13%) was obtained from the east aspect at post-flowering period. A total of 38 components were identified in the essential oil as 19 main components and 19 others in very small quantities (total of 2%). The main component of the essential oil was carvacrol (39.29-65.97%). © 2020 Parlar Scientific Publications. All rights reserved.
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    EFFECTS OF DIFFERENT ASPECTS AND HARVEST TIMES ON ESSENTIAL OIL RATIO AND COMPONENTS OF WILD THYME (THYMBRA SPICATA L. VAR. SPICATA)
    (Parlar Scientific Publications (P S P), 2020) Aslan, Emine; Arslan, Dogan
    The study was carried out to determine the quality characteristics of Thymbra spicata L. var. spicata which has a natural distribution in the flora of Siirt province, Turkey. The dried leaves and flowers of Thymbra spicata L. var. spicata, which is used in folk medicine in Anatolia, are consumed as spices and tea, and young shoots are used as salads. The essential oil content of the plant varies between 0.5 and 3.4%. A significant portion of essential oil in Thymbra spicata L. var. spicata is composed of carvacrol. In this study, essential oil ratio and essential oil components of Thymbra spicata L. var. spicata collected from different aspects (north, south, east, west) and at different harvest times (pre-flowering, full flowering and post-flowering) were determined. The samplings were carried out according to the split plots into randomized blocks experimental design with 4 replications. The results showed that essential oil ratio varied between 2.13 and 3.15%. The highest essential oil ratio (3.15%) was obtained from the west aspect during the full flowering period, while the lowest essential oil ratio (2.13%) was obtained from the east aspect at post-flowering period. A total of 38 components were identified in the essential oil as 19 main components and 19 others in very small quantities (total of 2%). The main component of the essential oil was carvacrol (39.29-65.97%).
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    Öğe
    Effects of Different Geographical Aspects and Ontogenetic Variability on Total Hypericin Content of Hypericum triquetrifolium Turra. and Hypericum scabrum L.
    (Tech Science Press, 2020) Aslan, Emine; Arslan, Dogan
    The present study was conducted to determine the total hypericin contents of Hypericum triquetrifolium Tuna. and Hypericum scabrum L. species which are naturally distributed in the flora of Siirt province, Turkey. Hypericin contents of Hypericum species grown in different geographical aspects (North, South, East, and West), and it was measured at different harvest times (full blooming and post blooming period). In the current study, it has been determined that total hypericin content varies considerably according to aspects, plant developmental stages (ontogenetic variance), and species. According to species x aspect interaction, the highest total hypericin content was recorded from the west aspect (3.13 mg/g) in Hypericum triquetrifolium, while, the lowest hypericin content was also obtained from the west aspect (1.22 mg/g) in Hypericum scabrum. When the highest total hypericin content was analyzed according to aspect x species x harvest time interaction, the highest total hypericin content was produced from Hypericum triquetrifolium at the harvest of west aspect with 5.28 mg/g, while the minimum amount of hypericin was obtained from the same aspect in Hypericum scabrum with 0.50 mg/g. In species x harvest time interaction, the highest total hypericin content was obtained from the full bloom (3.10 mg/g) harvest in Hypericum triquetrifolium, while the lowest hypericin was obtained from the full bloom (1.26 mg/g) harvest in Hypericum scabrum. The data suggest that the average total hypericin content was 2.26 mg/g in Hypericum triquetrifolium and 1.28 mg/g in Hypericum scabrum.
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    THE EFFECT OF DIFFERENT IRRIGATION APPLICATIONS ON WATER-YIELD RELATIONS AND QUALITY TRAITS OF LAVENDAN (LAVANDULA INTERMEDIA)
    (Parlar Scientific Publications (P S P), 2020) Ucak, Ali Beyhan; Arslan, Dogan; Arslan, Huseyin; Bayraktar, O. Volkan; Aslan, Emine
    This study was carried out for two years in 2016 and 2017 with the aim of investigating the effects of different irrigation treatments (I0, I50, I100) on some agronomic and quality traits of lavender (Lavandula intermedia) grown under semi-arid climate conditions. Drug flower yield in 2016 was 72.95 kg da(-1) while it was 93.92 kg da(-1) in 2017. The effect of irrigation on yield was not statistically significant, though the yield in 50% irrigation treatment was relatively higher compared to the other two treatments. The results of essential oil content and yield in 2017 were statistically significant and the highest essential oil content (5.5%) and yield (5.17 kg ha(-1)) were obtained from I100 irrigation treatment. Although the results of essential oil ratio and yield in 2016 were not statistically significant, similar to 2017, the highest essential oil ratio and yield (4.75%, 3.27 kg ha(-1)) were obtained from I100 irrigation treatment. The results indicated that irrigation had a significant positive effect on the essential oil content and yield of lavender. The ratio of linalyl acetate, which is the most important component of essential oil, ranged between 18.62 and 22.54% in 2016 and 2017. The results showed that lavender (Lavandula intermedia) can be grown well under semi-arid ecological conditions, however, the continuation of studies on lavender would be useful in making more accurate decisions. Scientific studies focusing on the effects of different irrigation treatments on characteristics of lavender are rare, thus this research is one of the first studies published on the subject. The results demonstrated the importance of irrigation in lavender (Lavandula intermedia) cultivation for essential oil production. The results revealed that irrigation in lavender cultivation has no significant effect on flower yield, but full irrigation (I100) is important to obtain higher essential oil yield.