Anatomical and micromorphological investigations on some Centaurea Asteraceae, Cardueae taxa from NE Anatolia

Year 2018, Volume: 11 Issue: 2, 29 - 41, 15.08.2018

Melahat Ozcan

Abstract

This study evaluates the phylogenetic relationships of some Centaurea s.l. taxa native to Northeast Anatolia, Turkey. Stem, leaf and cypsela anatomical structures and cypsela micromorphologies were characterized and compared in detail by using variance analysis and cluster analysis UPGMA . Macro and micromorphological characteristics of cypsela were investigated using a stereomicroscope and scanning electron microscope. Significant differences were observed in stem features, leaf midrib and lamina thickness, number of stomata, and epidermal cell wall patterns in the abaxial and adaxial surfaces among the taxa. Cypsela shapes were determined as ovoid or widely oblong. Cypselas can be distinguished into four types of surface ornamentations. The structure of the pericarp was described, as well as the testa, and the distribution of the sclerenchymatic zone of the ribs and secretory ducts resin in the mesocarp were evaluated

Keywords

anatomy , Centaurea , cypsela , micromorphology , SEM

Kuzeydoğu Anadolu Bölgesi’ndeki bazı Centaurea Asteraceae, Cardueae taksonları üzerinde anatomik ve mikromorfolojik araştırmalar

Abstract

Bu çalışma Kuzeydoğu Anadolu, Turkiye için doğal olan bazı Centaurea taksonlarının akrabalık ilişkilerini ele almaktadır. Gövde, yaprak ve sipsela anatomik yapıları ve mikromorfolojik özellikleri belirtilmekte ve varyas ile kümeleme analizi UPGMA uygulayarak detaylı olarak karşılaştırılmaktadır. Sipsela makro ve mikromorfolojik özellikleri stereomikroskop ve taramalı elektron mikroskobu kullanarak incelendi. Taksonlar arasında gövde özellikleri, yaprak orta damar ve lamina kalınlığı, stoma sayısı ve üst ile alt epidermis yüzey şekillerinde önemli farklılıklar gözlemlendi. Sipselalar şekillerine göre ovoid ve genişçe oblong olarak tanımlandı. Yüzey süslemelerine göre dört tip ayırt edildi. Testa yapısı ile perikarp yapısı tanımlandı ve damarlardaki sklerenkimatik kısımların ve mezokarpta salgı kanalarının dağılımı değerlendirildi

Keywords

Anatomi , Centaurea , sipsela , mikromorfoloji , SEM

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