Ersin MİNARECİ, Canan ÖZDEMİR, Yurdanur AKYOL, Okan KOCABAŞ, Esra KAYACAN

Türkiye'de Yayılış Gösteren Hyparrhenia hirta (L.) Stapf (Poaceae) Türünün Anatomik Yapısının Belirlenmesi

Bu çalışmada, Türkiye için monotipik bir tür olan Hyparrhenia hirta (L.) Stapf türünün anatomik özellikleri belirlenmiştir. Çalışmalar için bitki örnekleri Manisa ilinin Muradiye ilçesinden Temmuz ayı içerisinde 2013 yılında toplanmıştır. Bitkinin taze örneklerinin bir kısmı anatomik çalışmalarda kullanılmak üzere % 70'lik etanolde fikse edilmiştir. Örneklerin bir kısmı ise kurutularak herbaryum örneği haline getirilmiştir. Kök, gövde ve yaprak kısımlarından alınan kesitlerin; Leica DM 3000 marka kameralı mikroskop ile mikrofotoğrafları çekilmiştir. Anatomik ölçümler oküler mikrometre ile yapılarak minimum, maksimum, ortalama ve standart sapma değerleri tablo haline getirilmiştir. Çalışmada elde edilen veriler bazı Poaceae türleri ile karşılaştırılmıştır. Anatomik çalışmalarda kök enine kesitinde endodermis hücrelerinin çeperlerinin belirgin biçimde kalınlaştığı gözlenmiştir. Bu tip endodermis yapısı Monokotil bitkilerin kökleri için karakteristiktir. Çalışmanın sonucunda, H. hirta türünün kök örneklerinin enine kesitlerinde 4 yönlü kalınlaşma gösteren hücrelere sahip endodermis tabakası ve panikoid şeklinde korteks parankimasının varlığı gözlenmiştir. Gövde örneklerinde iletim demetlerinin epidermise ve kortekse bakan tarafında kap şeklinde yoğun biçimde yer alan sklerankima kümeleri görülmüştür. Yaprak örneklerinin enine kesitinde ise üçgen şekilli yaprak ana damarı ve bulliform yapıda hücreler gözlenmiştir. Bu özellikler Poaceae familyası için anatomik yapıdaki karakteristik özellikler olarak yorumlanmıştır

The Anatomical Study on Hyparrhenia hirta (L.) Stapf (Poaceae) Species in Turkey

In this study, Hyparrhenia hirta (L.) Stapf was examined anatomically which is monotypic species in Turkey. Plant specimens for the study were collected from Manisa Muradiye District in 2013. The fresh sample of the plant were fixed in 70% ethanol until being used in anatomical studies. Other plant parts were dried to prepare herbarium specimens. Cross-sections of root, stem and leaf were taken and photographed with Leica DM 3000 microscope. Anatomical measurements were performed with ocular micrometer and minimum, maximum, and average values and standard deviations were given in the tables. Findings were compared with several Poaceae species. In anatomical studies it has been determined that the thickenings were clear on the walls of endodermal cells of the root. These types of endodermal cells are common in the roots of Monocotyledons. As results of this study, the cross-section of root with 4-sided thickened endodermis; cortex parenchyma in the form of panicoid; the cross section of stem with sclerenchyma in the form of cup shape which is located on both side of epidermis under the vascular bundle toward to cortex; the triangle shaped main in the cross section of leaf vein and the bulliform cells were observed for H. Hirta. These features have been interpreted as the characteristic features of the anatomical structure for the Poaceae family

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