Karyological studies on the four Ornithogalum L. (Asparagaceae) taxa from Eskişehir (Central Anatolia, Turkey)
2014
Öztürk, Derviş | Koyuncu, Onur | Koray Yaylacı, Ö | Özgişi, Kurtuluş | Sezer, Okan | Tokur, Süleyman
In the current study, karyotypes of four taxa in the genus of Ornithogalum L. were examined. These taxa grow naturally in Eskişehir (Central Anatolia). Studies were carried out on somatic chromosomes, using the root tips squash technique and based on staining with acetic orcein stain, for the most actively dividing meristematic cells of the collected root tips. Their counts were based on chromosomes observed during mitotic division. For species included in the Ornithogalum L. (Asparagaceae) genus, O. montanum Cirillo has 2 n = 14 with basic chromosome number x = 7; O. comosum L. has 2 n = 20, basic chromosome number x = 10, O. pyrenaicum L. has 2 n = 24, basic chromosome number x = 12; and O. sigmoideum Freyn & Sint. has 2 n = 14, basic chromosome number x = 7; it was found that they have diploid chromosomes. O. montanum and O. sigmoideum chromosome numbers are 2 n = 14 (diploid races), but their basic karyotypes are different, including chromosome size, and position of centromere. Mean chromosomal length of the all taxa subject to the study is 1.20–7.63 μm. Chromosomal morphologies of all taxa include median, submedian and subtelocentric chromosome pairs. In addition to, karyograms and idiograms of all studied taxa were done.
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