Türkiye’deki Monotipik Pallenis spinosa (L.) Cass. Türü Üzerine Anatomik ve Karyolojik Bir Araştırma

Pallenis spinosa (L.) Cass. Türkiye için monotipik bir türdür. Tek yıllık otsu bitkilerden oluşur. Türün kök enine kesiti 1-2 sıra epidermis hücresine sahiptir. Korteks hücreleri epidermis ile merkezi silindirin arasını doldurur. Kökte radyal iletim demetleri bulunur. Gövde enine kesiti yuvarlak şekle sahiptir. İletim demetlerini saran tek sıralı, düzenli dizilmiş, nişasta kınını oluşturan parankima hücreleri mevcuttur. Sklerankima hücreleri, kolleteral iletim demetlerindeki floem hücrelerinin üzerini kaplar. Yapraklar bifasiyal tiptedir. Yaprağın her iki yüzünde de örtü tüyleri ve stomalar bulunur. Yapraklarda iletim demetlerinin her iki yüzünde de sklerankima hücreleri vardır. Türün kromozom sayısı 2x = 2n = 10 olarak belirlendi ve kromozom ölçümleri yapılarak haploid idiogramları ilk kez hazırlandı.

Anahtar Kelimeler:

Asteraceae, Anatomi, Karyoloji, pallenis spinosa

An Anatomical and Caryological Investigation On Monotypic Pallenis spinosa (L.) Cass. in Turkey

Pallenis spinosa (L.) Cass., which has an annual and herbacous life form, is represented by a single species (monotypic) in Turkey. There are 1-2 rows of epidermis cells in the root cross section of the taxon. Between the epidermis and the central cylinder is the cortex, which consists of parenchymatic cells. Root has a radial vasculer bundle. The cross-section of the stem has a round shape with single row and regular lined of cortex cell over the vascular bundle as a starch sheath. The sclerenchyma cells is cover the top of floem cells in the collateral vascular bundle. The leaves is a bifacial type. There are stomas and eglandular hairs both side of the leaves. Sclerenchyma cells are both side of vascular bundles in the leaves. We determined 2x = 2n = 10 chromosome number and made chromosome measurement and haploid idiogram of species.

Keywords:

Asteraceae, Anatomy, Caryology, Pallenis spinosa,

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