Origanum dubium is a valuable wild oregano species of the natural flora of Antalya, Turkey. In this study, we extracted essential oil (EO) by hydro-distillation of the aerial parts of selected O. dubium chemotype with highest EO content, and analyzed by gas chromatography/mass spectrometry. Carvacrol was the pri- mary component (85.9%) among 24 different compounds in the EO. The volatile test showed minimum inhibitory effect of the EO against Xanthomonas axonopodis pv. vesicatoria, Clavibacter michiganen- sis subsp. michiganensis, Xanthomonas axonopodis pv. phaseoli, Xanthomonas axonopodis pv. phaseoli var. fuscans, and Pseudomonas syringae pv. tomato, at 309, 303, 318, 254, and 901 µL/mL, respectively. A 1-hour treatment of bean and tomato seeds in the volatile phase of the EO effectively sterilized the seeds from bacterial pathogens without inhibiting their germination. To the best of our knowledge, this is the first study on the potential for the use of O. dubium EO as a seed protectant against bean and tomato seed-borne bacterial pathogens.

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This study aims to briefly introduce Mübahat Türker Küyel, who was one of the few people who did academic studies in the early years of the Republic of Turkey, and to reveal her contributions to the history of Turkic-Islamic thought. Mübahat Türker Küyel made important contributions in the field of philosophy in Turkey. One of the main reasons for presenting the study is that there are almost no studies on Küyel. As an example of these few studies, the master's thesis on his life, works and basic views can be given. In addition, there are several book chapters written about Küyel. However, although this article gives brief information about Küyel’s life and academic works, our study essentially differs from other studies in terms of identifying her contributions to Turkish thought through her writings. When the works of Küyel are examined carefully, It will be seen that she has various works on Turkish philosophers and thinkers such as al-Fārābī, Khawārizmī, al-Bīrūnī, Ibn al-Sīnā, Yusuf Has Hājib, Ahmad al-Yasawī and Yunus Emre. Küyel's doctoral dissertation titled Üç Tehâfüt Bakımından Felsefe ve Din Münasebeti, which covers the important issues of Islamic philosophy, still maintains its importance. It also should be said that her both translations and publications about al-Fārābī have a very important and original position in terms of Islamic Philosophy studies conducted in Turkey. As well as These studies she wrote about Pre-Islamic Turkish president such as Bilge Qaghan and Tonyukuk. When her works are examined in a holistic way, Küyel's contributions to Turkish culture and thought will be seen more clearly. In this study, which indicates the characteristics of a monograph, the literature was searched, and the descriptive method was used. Keywords: Islamic Philosophy, Mübahat Türker Küyel, Turkish-Islamic Thought, al-Fārābī, Ibn al-Sīnā, Ahmad Yasawī, Yunus Emre.

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The susceptibility of 93 different tomato cultivars that are commonly grown in greenhouses and field in the western Mediterranean region of Turkey have been assessed for resistance to bacterial speck disease caused by Pseudomonas syringae pv. tomato strains. The disease severity indexes (DSI) varied between zero and four for the tomato cultivars. Seven tomato cultivars showed hypersensitive reactions against strains of P. syringae pv. tomato carrying the avrpto1 gene. Six of these seven tomato cultivars had the PTO gene coding for resistance against bacterial speck. The PTO sequences from the tomato cultivars Atalay, Party, Petrus, Piccadilly, Prenses and Tyty had similarity of 94, 93, 94, 92, 95 and 94%, respectively, with the PTO sequence of Lycopersicon esculentum VFNT Cherry (AF220603), and had similarity of 98, 98, 96, 95, 100 and 98%, respectively, with the PTO sequence of Lycopersicon pimpinellifolium Rio Grande 76R (AF220602). These findings indicate a considerable variation in bacterial speck resistance and will aid in the choice of parental lines for breeding new tomato cultivars with resistance to bacterial speck.