Adil GÜNER, Vehbi ESER - optima

KARYOTYPE ANALYSIS OF THREE ENDEMIC TAXA IN
TRIPLEUROSPERMUM SCH. BIP. (ASTERACEAE) FROM TURKEY
AND ITS TAXONOMIC SIGNIFICANCE
Hüseyin �NCEER, Sema HAYIRLIO�LU-AYAZ, Melahat ÖZCAN, Nur�en AKSU, Murat
BAL
Karadeniz Technical University, Faculty of Sciences and Arts, Department of Biology, Trabzon
inceer@ktu.edu.tr
Tripleurospermum Sch. Bip. belongs to the tribe Anthemideae of the Asteraceae family and
comprises c. 40 species distributed mainly in Europe and temperate Asia, with a few species
also in North America and North Africa. Karyological studies have been largely used for
solving of the taxonomic problems of the genus. In this study, chromosome number and
morphology of T. baytopianum E. Hossain, T. rosellum (Boiss. & Orph.) Hayek var. album E.
Hossain and T. kotschyi (Boiss.) E. Hossain were investigated. The root tip meristems
obtained directly from natural populations or germinated from seeds were used for karyotype
analysis. Their chromosome numbers were as follows: T. baytopianum and T. rosellum var.
album 2n = 2x = 18; T. kotschyi 2n = 4x = 36. Karyotype analysis showed that the karyotypes
of these taxa consist of median and submedian centromered chromosomes. Chromosome
morphology of the studied taxa are new to science. Some correlations between ploidy levels
and morphological characters are noted and several systematic and evolutionary aspects of the
genus are discussed in the light of karyological data.
Keywords: Asteraceae, Karyotype analysis, Ploidy level, Tripleurospermum, Turkey
PALYNOLOGICAL, MORPHOLOGICAL, ECOLOGICAL AND
TAXONOMIC PROPERTIES OF PTILOSTEMON AFER (JACQ.)
GREUTER SUBSP. EBURNEUS GREUTER
�lginç KIZILPINAR 1 , Demet TÖRE 1 , Cahit DO�AN 1 , Sad�k ER�K 1
1 Hacettepe University, Faculty of Science, Department of Biology, Ankara,
ilginc@hacettepe.edu.tr, dtore@hacettepe.edu.tr,cdogan@hacettepe.edu.tr, serik@hacettepe.edu.tr
Ptilostemon afer (Jacq.) Greuter subsp. eburneus Greuter is an endemic taxon to Turkey. In
this research detailed pollen morphological structure have been studied under light (LM).
Pollen slides were prepared according to the method of Erdtman (1960). The LM studies were
made by an Olympus CX41 microscope with the aid of an apochromatic oil immersion
objective and periplan eye pieces. Measurements were based on 30 pollen grains. Mean,
standard deviation (SD) and variation of measurements were calculated by SPSS package
program. The terminology in this study corresponds to that used by Erdtman (1952). The
results of our study have shown that the pollen grains of species are radially symmetric,
isopolar, generally 3-colporate and prolate (P/E=1,49). Amb is triangular and the apoporium
is wide. The shape of the pores is similar to fusiform. The surface ornamentation is echinate.
The purpose of this study is to provide palynological information of P. afer subsp. eburneus
which would be helpful to establish classification. Besides palynological characteristics
morphological, ecological and taxonomic proporties were given.
Keywords: Ptilostemon afer, Asteraceae, endemic, pollen morphology
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