A. glutinosa (L.) gaertner subsp. glutinosa'nın (Betulaceae) polen morfolojisi

Betulaceae familyasının kuzey yarım kürede doğal olarak bulunan 6 cinsi bulunmakta ve bunlar çok sayıda polen üreten anemogam bitkilerdir. Betulaceae familyasına ait taksonların polenleri alerjiktir. Alnus'a ait A. glutinosa subsp. antitaurica, A. glutinosa subsp. glutinosa, A. glutinosa subsp. barbata, A. orientalis var. orientalis, A. orientalis var. pubescens taksonları Türkiye'de doğal olarak yetişmektedir. A. glutinosa subsp. glutinosa, Karadeniz bölgesinde doğal olarak yayılış göstermektedir. A. glutinosa polenleri de saman nezlesi ve alerjik rahatsızlıklara neden olmaktadır. Bu taksona ait polen morfolojisinin belirlenmesinin aeropalinoloji çalışmalarına bunun yanı sıra taksonomik ve farmasötik botanik çalışmalarına yardımcı olacağını düşünmekteyizThe Betulaceae family includes six genera and these genera are grown naturally in northern hemisphere. The taxa belonging to this family are anemogame. For this reason they produce too much pollen and these pollen have allergic effects. Alnus glutinosa subsp. antitaurica, A. glutinosa subsp. glutinosa, A. glutinosa subsp. barbata, A. orientalis var. orientalis, A. orientalis var. pubescens are the taxa belongingto the genus Alnus growing naturally in Turkey. A. glutinosa are distributed naturally in the Black Sea Region. The pollenof A. glutinosa can cause to pollinosis and allergic symptoms. Determination of palynological features of this taxon will be helpful for aeropalynological, taxonomic and pharmaceutical researche

Pollen Morphology of A. glutinosa (L.) Gaertner subsp. glutinosa (Betulaceae)

WOS: 000408505300010The Betulaceae family includes six genera and these genera are grown naturally in northern hemisphere. The taxa belonging to this family are anemogame. For this reason they produce too much pollen and these pollen have allergic effects. Alnus glutinosa subsp. antitaurica, A. glutinosa subsp. glutinosa, A. glutinosa subsp. barbata, A. orientalis var. orientalis, A. orientalis var. pubescens are the taxa belonging to the genus Alnus growing naturally in Turkey. A. glutinosa are distributed naturally in the Black Sea Region. The pollen of A. glutinosa can cause to pollinosis and allergic symptoms. Determination of palynological features of this taxon will be helpful for aeropalynological, taxonomic and pharmaceutical researches.Giresun University's Scientific Research Unit [FEN-BAP-A-250414-49]We would like to thank Giresun University's Scientific Research Unit (Project No. FEN-BAP-A-250414-49) for the financial support

The Nonlinear Dynamic Behaviour of Tapered Laminated Plates Subjected to Blast Loading

In this study, the geometrically nonlinear dynamic behaviour of simply supported tapered laminated composite plates subjected to the air blast loading is investigated numerically. In-plane stiffness, inertia and the geometric nonlinearity effects are considered in the formulation of the problem. The equations of motion for the tapered laminated plate are derived by the use of the virtual work principle. Approximate solution functions are assumed for the space domain and substituted into the equations of motion. Then, the Galerkin method is used to obtain the nonlinear algebraic differential equations in the time domain. The resulting equations are solved by using the finite difference approximation over the time. The effects of the taper ratio, the stacking sequence and the fiber orientation angle on the dynamic response are investigated. The displacement-time and strain-time histories are obtained on certain points in the tapered direction. The results obtained by using the present method are compared with the ones obtained by using a commercial finite element software ANSYS. The results are found to be in an agreement. The method presented here is able to determine the nonlinear dynamic response of simply supported tapered laminated plates to the air blast loading accurately

Anatomical and Pollen Characters in the Genus Epilobium L. (Onagraceae) from Northeast Anatolia

Coskuncelebi, Kamil/0000-0001-5713-6628;WOS: 000260391700006Anatomical and palynological features of E. algidum Bieb., E. palustre L., E. ponticum Hausskn., E. confusum Hausskn., E. hirsutum L. and E. montanum L. collected from NE Anatolia were examined and evaluated by numerical analysis in order to determine the taxonomic value of the observed internal peculiarities. Features related to pollen shape and ornamentation, idioblast distribution, number of palisade parenchyma rows and the presence and distribution of sclerenchyma fibers were found to be important in separating the examined taxa. Principal component analysis showed that the anatomical characters are more important than the palynological ones in explaining the total variation among the examined taxa

Comparison of Foliar Anatomy of Scorzonera L. (Asteraceae) Taxa from North East Anatolia

Coskuncelebi, Kamil/0000-0001-5713-6628;WOS: 000288090700015In the present study, the leaves of 18 Scorzonera L. (Asteraceae) taxa were studied by LM in order to assess anatomical variations that may serve as distinguishing characters and to evaluate their significance for the genus by numerical analysis. All the investigated species can be divided into distinct groups according to mesophyll and midrib structure. Firstly they can be divided in two groups based on presence/absence of cavity on midrib. Secondarily two main vascular bundle types can be identified in transverse sections according to the presence or absence of secretory cells in phloem. Principal component analysis (PCA) showed that width of the palisade tissue beneath the upper epidermis, rate of spongy to the mesophyll (w/w), average number of epidermal cells for both sides and average number of stomata on upper side are the most important characters in explaining the total variations

A comparative study on two closely relative Tulipa L. taxa from NE Anatolia

Coskuncelebi, Kamil/0000-0001-5713-6628WOS: 000261181800005This study presents observations on the anatomical, palynological and ecological features of Tulipa gumusanica Terzioglu and its morphologically similar relative, T. armena Boiss. var. armena, in order to clarify their similarities and differences. We found that these taxa have some important differences with regard to anatomical, palynological and ecological features, as well as morphological traits. General anatomical traits of both examined taxa are similar, both having isolateral leaves with distinct hypodermis and a stem with distinct monolayer collenchyma close to the epidermis. However, some anatomical characters such as mesophyll width, average number of stomata on lower epidermis, and epidermal cells on upper epidermis are found to be important in delimiting these taxa. In addition, considerable differences have been observed in pollen shape and size. The species differ ecologically in that T. gumusanica prefers slightly acidic soil with low organic content in the woodland, whereas T. armena var. armena prefers slightly alkali soil with high organic content in steppe vegetation