Browsing by Author "Aktaş K."
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Item A comparative study of antimicrobial activity using well and disk diffusion method on Asphodelus aestivus (Liliaceae); [Asphodelus aestivus (Liliaceae)'un antimikrobiyal etkisinin çukur ve disk diffüzyon yöntemiyle karşilaştirmali olarak belirlenmesi](2007) Oskay M.; Aktaş K.; Sari D.; Azeri C.Plant parts were powdered, extracted in a Soxhlet extractor with n-butanol and ethanol (60-80°C) for 12 h, filtered using Whatman filter paper no:4 and the filtrate was then evaporated at 70°C. For determination of antimicrobial activity, different concentrations of crude extract tested against bacteria and yeasts by both well and disk diffusion method. Results showed that the Asphodelus aestivus extract (Flower, fruits and whole plant) exhibited antimicrobial activity ranging from 2 to 15 mm. Extract obtained with ethanol was showed more inhibision. According to same concentrations of crude extract used with well diffusion method results were a bit higher than disc diffusion results. Minimal inhibitory concentration (MIC) determined on susceptible microorganisms by macrobroth dilution method, and MIC values were shown from 36 to 90 mg/mL. Also some commercial antibiotics were used to determine sensitivity of the test microorganisms and comparison.Item Anatomical studies in salvia viridis L. (Lamiaceae)(Bangladesh Association of Plant Taxonomists (BAPT), 2009) Özdemir C.; Baran P.; Aktaş K.Anatomical properties of two morphologically distinct forms (Form I: with violet coma and Form II: without coma or with white, green or pink coma) of Salvia viridis L. have been studied. The analysis provided here studying the cross-sections of root, stem, leaf, petiole, bract, calyx and corolla comprises the first detailed description for the species. The results are furnished with photographs and drawings. Although no anatomical differences were observed between the forms, S. viridis showed some differences from other Salvia species. © 2009 Bangladesh Association of Plant Taxonomists.Item Morphological and anatomical characteristics of Salvia tchihatcheffii endemic to Turkey(2009) Aktaş K.; Özdemir C.; Özkan M.; Akyol Y.; Baran P.In this study, the morphological and anatomical properties of Salvia tchihatcheffii (Fisch. & Mey.) Boiss. (Lamiaceae) which is endemic to Turkey was investigated. S. tchihatcheffii has a perennial taproot. In contrast to the other Salvia species that was investigated before the plant has two different stem as fertile and sterile stem with round in shape. Sterile stem is prostrate, leafy, fertile stem is procumbentascending, unbranched. The stamen type of the plant is A. We observed that in cross-section sterile stem three different cortex layer, with one of them is formed as crescent shape. In addition, the glandular hairs of the investigated species are classified. Other anatomical features are discussed too. The results are presented with photographs, drawings and tables. © 2009 Academic Journals.Item Structural investigation of the glandular trichomes of Salvia argentea(2010) Baran P.; Özdemir C.; Aktaş K.The morphology, anatomy and distribution of glandular trichomes on the aerial organs of Salvia argentea L. has been investigated. Two morphologically distinct types of glandular trichomes were determined. Capitate glandular trichomes forming a base 1-7 celled, a stalk 1-5 celled or no stalk and a head uni- or bicellular had various types. In capitate trichomes, the neck cell that has an important role especially for xeroformic plants, acting to prevent the backflow of secreted substance through the apoplast has been distinctively observed in the investigated species. The capitate trichomes were present abundantly on all aerial organs of S. argentea. Peltate glandular trichomes had a large secretory head forming 1-5, 8 central and 8-10, 12, 14 peripheral cells. Peltate trichomes are present on all aerial organs, except petiole, being the most abundant on calyx and corolla. Results were shown by tables and photographs. © 2009 Institute of Botany, Slovak Academy of Sciences.Item Structural investigation of the glandular trichomes of endemic Salvia smyrnea L.(2010) Baran P.; Aktaş K.; Özdemir C.The morphology, anatomy and distribution of glandular trichomes on the aerial organs of Salvia smyrnea L. endemic to Turkey have been investigated with light microscopy (LM) and scanning electron microscopy (SEM). This species is evaluated in endangered (EN) category. Two morphologically distinct types of glandular trichomes were determined. Various types of capitate glandular trichomes consist of a 1-4 celled base, a 1-8 stalk celled or no stalk and a uni- or bicellular head. In capitate trichomes the neck cell that has an important role especially for xeromorfic plants, acting to prevent the backflow of secreted substance through the apoplast, has been distinctively observed in the investigated species. The capitate trichomes were present abundantly on all aerial organs of S. smyrnea. Peltate glandular trichomes had a large secretory head comprising 1-2 central and 4,6, 8-10 peripheral cells. This study pointed out that S. smyrnea was of rich glandular trichomes in point of diversity and quantity. © 2010 Elsevier B.V.Item Comparative pollen morphology of Turkish species of Petrorhagia (Caryophyllaceae) and its systematic implications(2010) Aktaş K.; Altan Y.; Özdemir C.; Baran P.; Garnatje T.Pollen morphology of 10 taxa from Turkey, four of them endemic, belonging to the genus Petrorhagia (Caryophyllaceae), P. alpina subsp. alpina, P. alpina subsp. olympica, P. cretica, P. dubia, P. hispidula, P. lycica, P. pamphylica, P. peroninii, P. prolifera and P. saxifraga, has been investigated using light (LM) and scanning electron (SEM) microscopy. Pollen morphology differences among these taxa have been determined. The pollen type of investigated taxa is polyporate (12-22-porate), sphaeroidal, the exine exhibits a tectate structure and a microechinate ornamentation. Petrorhagia alpina subsp. alpina has the smallest pollen grain diameter (18.57 μm) and P. dubia the largest one (37.80 μm). The number of pores ranges from 12 (in P. dubia and P. saxifraga) to 22 (in P. alpina subsp. alpina and P. alpina subsp. olympica and P. hispidula) with a minimum pore diameter of 2.37 μm in P. alpina subsp. alpina and a maximum pore diameter of 4.23 μm in P. peroninii. The exine thickness ranges from 1.73 μm in P. saxifraga to 3.78 μm in P. pamphylica. In this study, the systematic implications are discussed in the light of palynological results. © 2010 Versita Warsaw and Springer-Verlag Wien.Item Morphological and anatomical investigations on three Allium L. (Liliaceae) species of east Anatolia, Turkey(Bangladesh Botanical Society, 2011) Özdemir C.; Aktaş K.; Altan Y.Three East Anatolia species of Allium namely, A. karsianum Fomin, A. kunthianum Vved., A. rupestre Steven are compared morphologically and anatomically. The results showed that all the species investigated can be distinguished by their morphological and anatomical characters.Item Pollen morphology of some Turkish Salvia L. (lamiaceae: Mentheae) species; [Morfologia de pólen de algumas espécies turcas de Salvia L. (lamiaceae: mentheae)](Sociedade Brasileira da Ciencia das Plantas Daninha, 2020) Aktaş K.; Özdemir C.; Özkan M.; Baran P.In this presented work, the pollen morphologies of twenty-one taxa, nine of them endemic from Turkey, belonging to the genus Salvia (Lamiaceae: subfamily Nepetoideae: tribe Mentheae: sub-tribe Salviinae), S. aethiopis L., S. argentea L., S. aytachii Vural & Adigüzel, S. blepharochlaena Hedge & Hub.-Mor., S. cadmica Boiss., S. ceratophylla L., S. cryptantha Montbret & Aucher, S. frigida Boiss., S. fructicosa Miller, S. halophile Hedge, S. napifolia Jacq., S. microstegia Boiss. & Bal., S. recognita Fisch. & Mey. S. sclarea L., S. smyrnaea Boiss. S. suffruticosa Montbret & Aucher, S. tchihatcheffii (Fisch. & Mey.) Boiss., S. tometosa Bertol, S. verbenaca L., S. viridis L., and S. wiedemanni Boiss. and collected throughout the Turkey, have been intensively studied by using light (LM) and a scanning electron (SEM) microscopy. The objectives of this study are to investigate the pollen morphologies of twenty-one taxa of Turkish Salvia (nine of which are endemic) and to present similar and different characteristics of the taxa. The investigated whole pollen grains had a structure of both isopolar and radial symmetry. Overall, types of aperture were mostly hexacolpate, but it was also determined that the aperture type of S. viridis was both hexacolpate and octacolpate. The pollen grains had characteristic shapes of spheroidal, suboblate, prolate and subprolate. The exine ornamentation was bireticulate and reticulate-perforate. It was determined by the results of palynological studies that pollen morphology changed amongst these studied taxa. As a conclusion, the results of the present study show that palynological characters such as pollen shape, polar axis length (P), equatorial axis length (E), aperture numbers and types and exine ornamentation, exhibit remarkable differences amongst the studied taxa. © 2020, Sociedade Brasileira da Ciencia das Plantas Daninha. All rights reserved.Item Chromosome numbers and genome size data on species of the genus Petrorhagia (Caryophyllaceae) from Turkey(Turkiye Klinikleri, 2022) Aktaş K.; Pellicer J.; Garnatje T.Genome size, i.e. the total amount of DNA in an unreplicated somatic nucleus is considered an important character in the biology of organisms, and it is especially relevant for land plants given the extraordinary diversity reported. Despite the continuous growth of data and the efforts aimed at increasing our understanding of plant genome size diversity, more data are needed to have an evenly representation across lineages. With this premise in mind, in this work, we investigated genome size, complemented with chromosome data in eight species of the genus Petrorhagia (Caryophyllaceae) from Turkey. Chromosome counts made indicate that the species studied are diploid except for one species, P. saxifraga, which is probably a tetraploid, based on previously published estimations of nuclear DNA contents. The presence of both basic chromosome numbers x = 15 and x = 13 is confirmed, the latter being restricted to the species P. hispidula and P. cretica. The counts carried out for the Turkish endemic species, in P. hispidula (2n = 26), P. pamphylica (2n = 30) and P. peroninii (2n = 30) represent novel data for the genus. Nuclear DNA contents ranged from 1.24 to 2.32 pg/2C (varying 1.87-fold). Based on available data, genome expansions in the genus seem to have occurred through different evolutionary mechanisms, such as polyploidy and differential repetitive DNA activation, evidencing contrasting genomic trajectories between closely related taxa. © TÜBİTAK.