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    Bazı Ruta L. ekstraktlarının biyoaktif madde içerikleri ve radikal kovucu aktiviteleri
    (KAHRAMANMARAS SUTCU IMAM UNIV REKTORLUGU, 2019) Yaman, Cennet.; Ulukuş, Deniz.; Tugay, Osman.
    Ruta L. is a genus of the Rutaceae family, mostly used as a traditional medicinal plant. In this study, the antioxidant activities of methanolic and ethanolic extracts of wild Ruta chalepensis L. (above ground plant) and Ruta montana L. (leaves-flowers, stems) were assessed. The results showed that methanol extract of flower-leave of Ruta montana provided the highest yield of extraction (15.11%, 151.12 +/- 0.78 mg/g) whereas the lowest yield was obtained in ethanol extract of stems of Ruta montana (2.67%, 26.66 +/- 0.50 mg/g). Total flavonoid content in dry weight of methanol and ethanol extracts of Ruta chalepensis was found higher than other extracts except methanol leaves-flowers extract of Ruta montana. It was determinated that ethanol extracts of Ruta montana stem sustained less total flavonoid and phenolic content. Also, radical scavenging activities such as 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) and 2, 2'-Azino-Bis-3-Ethylbenzothiazoline-6-Sulfonic acid (ABTS) of extracts was investigated, and according to the solvent, it was revealed that extracts of Ruta chalepensis exhibited high activity. As a result, it has been discussed that Ruta can be used as a natural antioxidant by taking advantage of these data.
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    Morphology, anatomy and palynology of two endemic Cousinia cass. species (sect. Cousinia, Asteraceae) and their taxonomic implications
    (PAKISTAN BOTANICAL SOC, 2020) Ulukuş, Deniz.; Tugay, Osman.
    The morphological, anatomical and palynological features of Cousinia eleonorae Hub.-Mor. and Cousinia humilis Boiss. are provided along with their taxonomic significance. Their expanded description, distribution map and coloured photographs are also given. The morphological characteristics of leaves, phyllaries are taxonomically significant for distinguishing Cousinia species. In addition, the micromorphological characteristics of pollen grains and achenes are provided with the use of scanning electron microscopy. Anatomical characters such as number of cortex cells, number of vascular bundles and midrib shape are found to be significant characters. Moreover, exine sculpturing pattern and shape of pollen grains can be used for taxonomic purposes.