Hekzaploid (2n=24) Bellevalia edirnensis Özhatay & Mathew’in polen mitozu ve polen morfolojisinin incelenmesi
Hekzaploid (2n=24) Bellevalia edirnensis Özhatay & Mathew’in polen mitozu ve polen morfolojisi incelendi. Mikrosporların büyüklük bakımından varyasyon gösterdikleri, ekzin ve apertürün polen mitozu baslamadan önce gelistigi görüldü. Polen mitozunda polarite, asimetrik ig ve normal mitoz bölünmelerle birlikte bazı anormalliklerde gözlendi. Polaritede hem nukleus göçünün hemde vakuol olusumunun rol oynadıgı saptandı. Vegetatif hücrenin distal kutupta, generatif hücrenin ise proksimal kutupta yer aldıgı görüldü. Olgun polenlerin iki hücreli, polen seklinin sphaeroidea, polen tipinin trichotomosulcatae, ekzin strüktürünün (yapısının) tectatae, skulpturun (ekzin süslerinin) ise reticulatae oldugu belirlendi. B. edirnensis’in incelenen bu özellikleri ilk defa bu çalısmada saptandı.
A study of pollen mitosis and pollen morphology in Hexaploid (2n=24) Bellevalia edirnensis Özhatay & Mathew
The pollen mitosis and pollen morphology of hexaploid (2n=24) Bellevalia edirnensis Özhatay & Mathew were examined. Microspores exhibited variation in size, and the exine and aperture developed before pollen mitosis began. During pollen mitosis, polarization, asymmetric styles and normal divisions were observed together with some abnormalities. During polarization of the microspore both nucleus migration and vacuole formation were common. The generative nucleus was in the proximal pole and the vegetative nucleus was in the distal pole. It was also determined that the mature pollens were 2-celled, the shape of the pollens was sphaeroidea, the type of the pollens was trichotomosulcatae, the structure of the exine was tectatae and the sculpture was reticulatae. This paper contains the first description of the characteristics of B. edirnensis.