Browsing by Author "Yazici, C"

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    Foliar anatomy of some Prunus L. subgen. Cerasus Mill. (Rosaceae) taxa
    Ordu, PIB; Çiftçi, A; Mollman, R; Yazici, C; Abudurusuli, A; Sik, L; Erol, O
    Prunus L. subgen. Cerasus Mill. (Rosaceae) contains numerous economically important species, including fruit trees and ornamental plants. This study compares the leaf anatomy and calcium oxalate crystal types of 98 individuals of 14 Prunus subgen. Cerasus taxa from Turkey. We stained leaf sections with Safranin-Alcian Blue double stain and mapped calcium oxalate crystals under light microscope with polarized light. We used one-way ANOVA to determine the statistical significance of quantitative data. Significant quantitative and qualitative data were analyzed using PCoA to establish relationships among taxa. We observed three different crystal distribution patterns and three crystal types, finding druses present in all taxa, while some taxa also have sand or prismatic forms. Most characters showed high variation. Our analysis shows that vascular bundle, midrib, upper epidermis and lower epidermis width/length ratios; midrib epidermis, upper epidermis and phloem cell lengths; upper epidermis and lower epidermis cell widths and lower cuticle thickness are not taxonomically useful, while features of the bundle sheath, epidermis cell surface, phloem fibers, mesophyll layers and angle of blade between the midrib can be used in conjunction with other characters to distinguish certain taxa. Overall, PCoA delineated two rough groups, separating P. avium, P. cerasus and P. mahaleb from the rest of the studied taxa. In investigating the anatomical variation between different individuals of these taxa, we found that some features previously used in infraspecific taxa, such as trichomes, varied sometimes even within an individual, casting doubt on the wisdom of using these for systematic work in subgenus Cerasus.
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    A new autumn-flowering Crocus (Iridaceae) from Türkiye: C. rifatozdemiri sp. nov.
    Sik, L; Yazici, C; Mollman, RR; Harpke, D; Kaleli, BS; Çiftçi, A; Erol, O
    C. rifatozdemiri sp. nov. is a new autumn-blooming species from Crocus series Crocus described from three locations on Mount & Ccedil;al in Mu & gbreve;la province in southwest T & uuml;rkiye. The new species is notable for its large showy white flowers with sharply mucronate segment tips and contrasting bright red stigma branches. The exceptionally tall stigma is what most clearly differentiates the new species from its closest relatives, with its long branches that usually divide from above the anther tips, although other morphological features, such as tunic neck and tepal shape, as well as molecular data, support its separation from other members of series Crocus. . nrETS and nrITS nuclear regions were used to infer the phylogenetic affiliation of the new species within series Crocus, , resulting in a clear separation between it and closest relative C. kofudagensis, , as well as other members of the series. Leaf anatomy was found to be similar to other members of series Crocus, , which tend to show minimal differences between species. Finally, a full description and diagnosis, chromosome count, line illustration and figures detailing the features of this new endemic taxon, which is so far known only from one mountain in T & uuml;rkiye.
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    Towards a better understanding of Prunus (Rosaceae): molecular and morphological notes on Prunus subgenus Cerasus in Turkey
    Ciftci, A; Gercek, YC; Mollman, R; Ordu, PIB; Yazici, C; Yaprak, AE; Morgil, H; Sik, L; Erol, O
    In this study, we explore the relationships among taxa of Prunus subgenus Cerasus in Turkey using a combination of macromorphology, micromorphology and molecular techniques. We recorded qualitative and quantitative characteristics of flowers, leaves, seeds and endocarp for 96 populations representing 14 taxa of Prunus subgenus Cerasus. ITS, matK, ycf1, trnL-trnF DNA sequence data were used to reconstruct phylogenetic trees for this group. Haplotype analyses results found 11 haplotypes among the samples used in this study. We also note that the infraspecific taxa of Cerasus angustifolia (=P. albicaulis), P. mahaleb, P. microcarpa and P. prostrata, as described by previous authors, do not exhibit significant differences even among the features of foliar morphology that are so often used to distinguish them from one another. As a general rule, our analyses indicate that the highly variable features of leaf micromorphology and endocarp and seed micromorphology are not taxonomically significant. In contrast, although floral morphology is often overlooked in systematic studies of Prunus subgenus Cerasus, we found several taxonomically useful flower characters, including sepal indumentum, hypanthium shape and indumentum and petal shape. This work clarifies the infraspecific relationships of members of Prunus subgenus Cerasus in Turkey and solves some taxonomic problems.