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    Comparison of the leaf, root and fruit oils of Diplotaenia cachrydifolia from Turkey
    (TAYLOR & FRANCIS INC, 2004) Ozcan, M; Bagci, Y; Ertugrul, K; Novak, J
    he essential oils of three different parts (roots, leaves and fruits) of Diplotaenia cachrydifolia were investigated by GC/MS. The oil Yield of dried parts obtained by hydrodistillation were 0.33%, 1.67% and 2.9% (v/dw) respectively. Thirty-five compounds representing 92.7%, 97.9% and 97.7% ofthe root, leaf and fruit oils were identified, respectively. Major constituents of root oil were isomyristicin (21.4%), alpha-phellandrene (18.8%) phellandrene (9.8%), methyl Oleate (9.6%), beta-cymene (7.6%) and (E)-isodillapiole. However, the characteristic compounds of leaf and fruit oils were terpinolene (64.1%, 69.34%), (E)-dillapiole (17.59%, 7.7%), beta-phellandrene (4.5%. 67,0%) and(E)-beta-ocimene (2.3%, 3.8%), respectively. The oil constituents ofthe leaves and fruits were found to be similar. However, the amounts of isomyristicin alpha-phellaiidrene and methyloleate in the roots were higher than those of leaves and fruits.
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    New chromosome counts in the Centaurea Jacea group (Asteraceae, Cardueae) and some related taxa
    (OXFORD UNIV PRESS, 2004) Romaschenko, K; Ertugrul, K; Susanna, A; Garcia-Jacas, N; Uysal, T; Arslan, E
    Twenty-seven chromosome counts are reported in 23 species of the genus Centaurea, mostly eastern endemic species of the Jacea group, which has become the core of the re-defined genus Centaurea. Twenty reports are new, one is a correction of a previous count, one is a confirmation of limited previous data and one represents a new basic number in the Centaureinae. The prevalence of the basic chromosome number x = 9 among the Eastern sections of the Jacea group is confirmed, together with the close correlation between karyological data and classification of the genus. Two alternative hypotheses on the aberrant chromosome number (for the Centaureinae) found in C. behen are proposed. One of them, if verified, would confirm that a cycle of polyploidy and descending dysploidy is a key mechanism in the speciation of the group. (C) 2004 The Linnean Society of London.
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    A new species of Ornithogalum (Liliaceae) from South Anatolia, Turkey
    (BLACKWELL PUBLISHING, 2005) Uysal, T; Ertugrul, K; Dural, H
    Ornithogalum chetikianum Uysal, Ertugrul & Dural sp. nov. (Liliaceae) is described and illustrated from Anatolia, Turkey. The species grows on alpine steppe and stony places in Bozkir (C4 Konya province) in South Anatolia. It is closely related to O. nutans L. and O. demirizianum Malyer & M.Koyuncu, an endemic confined to South Anatolia. Diagnostic morphological characters are discussed. Notes are also presented on the ecology, biogeography and conservation status of the new species. (c) 2005 The Linnean Society of London.
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    Secondary metabolites from Centaurea isaurica from Turkey and their chemotaxonomical significance
    (PERGAMON-ELSEVIER SCIENCE LTD, 2004) Flamini, G; Stoppelli, G; Morelli, I; Ertugrul, K; Dural, H; Tugay, O; Demirelma, H
    The Turkish endemic species Centaurea isaurica (Asteraceae) has been studied for the first time to afford 10 known compounds. Identification by mean of spectroscopic techniques revealed the presence of beta-sitosterol 3-glucoside, protocatechuic acid, scopoletin, chlorogenic acid, jacein, centaurein, kaempferol-3-glucoside, quercetin 3-glucoside, arctiin and janerin. Its taxonomical classification is still uncertain being placed either in the Section Pseudoseridia or Cheirolepis. The secondary metabolites isolated in this investigation, janerin in particular, seem to suggest its placement in Section Pseudoseridia. (C) 2004 Elsevier Ltd. All rights reserved.
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    The systematic position of Centaurea ensiformis and Centaurea isaurica from Turkey and the evolution of some characters in Centaurea
    (LASER PAGES PUBL LTD, 2004) Ertugrul, K; Uysal, T; Garcia-Jacas, N; Susanna, A; Garnatje, T
    The systematic affinities of Centaurea ensiformis and Centaurea isaurica, two rare Turkish endemics, were difficult to establish on the basis of morphological characters. Their systematic position was recently unraveled by DNA sequence analyses, and they appear to be related to sect. Cheirolepis. We have carried out a detailed study of the main morphological characters that are used for the sectional classification of Centaurea, the appendages of the bracts and the achenes, in a wide sample of sect. Cheirolepis. The main conclusion is that the extremes of diversity in the shape of the appendages can be connected by intermediate forms, and a hypothesis of the evolution of the appendages is offered. This hypothesis, together with some cases of parallel evolution, would explain why there are so many examples of misclassifications based on this character alone. Regarding achenes, our conclusion is that they are important for the species level, but not useful for sectional classification of this group. Finally, the closely related sect. Plumosipappus, described mainly on microcharacters of the pappus, must be merged into Cheirolepis.