Ph.D. Tezi Görüntüleme | |||||||||||||||||||||
|
|
||||||||||||||||||||
| Summary: In this study, 18 Scorzonera L. (Asteraceae) taxa were examined in terms of morphological and anatomical features. Specimens collected from NE Anatolia between 2003-2006 were stored as herbarium and fixation materials. These specimens were firstly identified by using flora books and some special studies. Features of leaf, achen and fillaries, the number, lenght and hairness of capitulum are very important among the morphologically examined traits for precise identification of the taxa.Anatomical investigations were carried out using permanent slides prepared from stored samples. Anatomic sections were taken from root, stem, achene and leaf of identified taxa transversely and at the same time leaf of the taxa superficially. Some distinct differences were determined in the stem and leaf anatomy of the examined taxa. Presence and distributions of latex ducts and secretion cells are important anatomical characters for stem. Cell type and those of distributions are different in pericarp of examined taxa. As a result of morphological and anatomical examination, it was determined that some additional characters are very useful in precise identification of systematically problematic taxa. A new key for the examined taxas were prepared in this study. At the same time, morphological and anatomical data obtained from this study were assessed by using numerical methods. According to numerical findings, it was seen that morphological features are more important than anatomical features.18 Scorzonera taxa were compared anatomically for the first time. Two Scorzonera taxa were determined as new records for the area. Keywords: Scorzonera, Asteraceae, Morphology, Anatomy, Nort East Anatolia | |||||||||||||||||||||