Browsing by Author "Altan, Y"

Now showing 1 - 12 of 12
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    Morphological and anatomical characteristics of endemic Salvia huberi hedge in Turkey
    Ozdemir, C; Altan, Y
    The morphological and anatomical features of S. huberi an endemic member of the genus Salvia in Turkey have been examined in this study. The characters such as the structure of the vascular bundles of the petiole and the number of pith rays can be helpful to distinguish the species of Salvia from each other. In addition, the differences in the anatomy of hair morphology may be helpful to account for the anatomical knowledge of the genus.
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    Morphological and anatomical investigations on endemic Scutellaria orientalis L. subsp bicolor (Hochst.) Edmund and subsp Santolinoides (Hausskn ex Bornm)
    Özdemir, C; Altan, Y
    Morphological and anatomical characteristics of Scutellaria orientalis L. subsp. bicolor (Hochst.) Edmund and subsp. santolinoides (Hausskn ex Bornm) has been described which will help to distinguish them from each other.
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    Fatty acid and tocochromanol patterns of some Turkish Boraginaceae - a chemotaxonomic approach
    Bagci, E; Bruehl, L; Aitzetmuller, K; Altan, Y
    The plant family Boraginaceae is known to produce a set of unusual fatty acids in the seed oils. In this study, the fatty acid, tocopherol, tocotrienol and plasto-chromanol-8 contents of some Onosma species (Onosma sericeum, O. armeniacum and O. polioxanthum) all belonging to sect. Onosma, Anchusa leptophylla subsp. leptophylla, Alkanna froedini and Paracaryum stenophyllum were determined. Some of the studied species are endemic for Turkey. While oleic, linoleic and alpha linolenic acid are the highest as usual fatty acids, gamma linolenic and stearidonic acids are more variable unusual fatty acids in studied genera patterns and the relative concentrations some of these fatty acids and partly also the tocochromanols in Boraginaceae seed oils are suggested to have chemotaxonomic value in this family. In particular, the presence or absence of chain elongation to erucic acid (22:1) and the presence or absence of Delta6-methylene-interrupted polyenoic acids such as gamma-linolenic and stearidonic acid are determined and marked as indicators of taxonomic relationship.
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    Comparative pollen morphology of Turkish species of Petrorhagia (Caryophyllaceae) and its systematic implications
    Aktas, K; Altan, Y; Özdemir, C; Baran, P; Garnatje, T
    Pollen morphology of 10 taxa from Turkey, four of them endemic, belonging to the genus Petrorhagia (Caryophyllaceae), P. alpina subsp. alpina, P. alpina subsp. olympica, P. cretica, P. dubia, P. hispidula, P. lycica, P. pamphylica, P. peroninii, P. prolifera and P. saxifraga, has been investigated using light (LM) and scanning electron (SEM) microscopy. Pollen morphology differences among these taxa have been determined. The pollen type of investigated taxa is polyporate (12-22-porate), sphaeroidal, the exine exhibits a tectate structure and a microechinate ornamentation. Petrorhagia alpina subsp. alpina has the smallest pollen grain diameter (18.57 mu m) and P. dubia the largest one (37.80 mu m). The number of pores ranges from 12 (in P. dubia and P. saxifraga) to 22 (in P. alpina subsp. alpina and P. alpina subsp. olympica and P. hispidula) with a minimum pore diameter of 2.37 mu m in P. alpina subsp. alpina and a maximum pore diameter of 4.23 mu m in P. peroninii. The exine thickness ranges from 1.73 mu m in P. saxifraga to 3.78 mu m in P. pamphylica. In this study, the systematic implications are discussed in the light of palynological results.
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    MORPHOLOGICAL AND ANATOMICAL INVESTIGATIONS ON THREE ALLIUM L. (LILIACEAE) SPECIES OF EAST ANATOLIA, TURKEY
    Özdemir, C; Aktas, K; Altan, Y
    Three East Anatolia species of Allium namely, A. karsianum Fomin. A. kunthianum Vved.. A. rupestre Steven are compared morphologically and anatomically. The results showed that all the species investigated can be distinguished by their morphological and anatomical characters.
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    Morphological and anatomical studies on economically important Empetrum nigrum L. subsp hermaphroditum (Hagerup) Bocher (Empetraceae)
    Altan, Y; Özdemir, C
    Allan, Yasin and Canan Ozdemir (Department of Biology, Faculty of Art and Science, Celal Bayar University, Manisa, Turkey; email cozdemir13@hotmail.com). MORPHOLOGICAL AND ANATOMICAL STUDIES ON ECONOMICALLY IMPORTANT EMPETRUM NIGRUM L. SUBSP. HERMAPHRODITUM (HAGERUP) BOCHER (EMPETRACEAE). Economic Botany 58(4):679-683, 2004. The study is based on anatomical and morphological investigations of Empetrum nigrum L. subsp. hermaphroditum (Hagerup) Bocher, an important plant because of its value for medicine and food. Plant samples were collected from the northeastern part of Turkey. Morphological and anatomical features of various plant parts (e.g., stem, leaf flower, and fruit) are illustrated and described in detail.
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    A NEW RECORD FROM TURKEY: CONSOLIDA SAMIA PH DAVIS (RANUNCULACEAE)
    Minareci, E; Altan, Y; Aktan, T
    Consolida samia P.H.Davis (Ranunculaceae) is one of the Top 50 Plants of IUCN Species Survival Commission. C. samia, as a new record for the Flora of Turkey is described and illustrated from West Anatolia in this study. The specimens were collected from a gravel-like substrate with the largest pebbles in the Balikesir border of Manisa. The description of the species has also been expanded, following collection of specific plant materials. In this study, the detailed morphological characteristics and palynological properties were determined and compared with the closely related taxon C. hellespontica (Boiss.) Chater. Also, line drawing, photographs and a distribution map of C. samia species of Turkey were presented. Our studies led us to recommend it as CR Blab (iii,v)+2ab(iii,v), according to the 2001 IUCN categories.
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    Ethnobotanical studies in the Maldan Village (Province Manisa, Turkey)
    Akyol, Y; Altan, Y
    Village of Maldan (400 m) lies in the north of Manisa on the Yunt Mountain (1075 m). According to Davis' Grid system the area is in the B1 square. In this study plants were collected from Maldan (Manisa) village between 2002-2003 years. At the end of flora studies 468 taxa belonging 70 families and 276 genera were identified. Ethnobotanical surveys were made in the same village. The researchers interviewed people in village. A total of 77 different usages of wild plants were recorded in the study area. Out of 468 plant taxa commonly present, 68 plant taxa (14,5%) are used for medicinal, foodstuff, fodder, dye and miscellaneous purposes. Most used families were Asteraceae, Lamiaceae, Rosaceae, Brassicaceae and Apiaceae. These plants are mainly used against for the stomach and digestive disorders (24,6 %), as food (10,4 %), for preventing cancer (10,4 %), against the skin diseases and injurie (7,8 %).
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    Morphological and anatomical investigation of some endemic Alkanna species
    Özdemir, C; Altan, Y
    The aim of this study is to provide information on the morphological and anatomical properties of Alkanna firoedinii Rech.fil and Alkana cardifolia C. Koch, which are endemic in Turkey and are used in folk medicine. It has been reported that A. froedinii and A. cardiofolia are closely related to each other. In this study, the Alkanna species have been investigated for morphological and anatomical differences. It has been observed A.froedinii has some different characteristics from A. cardiofolia Such as numerous setiform and glandular hairs.
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    Some interesting endemic plants collected from the East and the Northeast of Turkey and their threatened categories
    Altan, Y
    This study was carried out during the field trips for Turkey's endemic plant seeds collection project where 48 taxa presented in this study were interesting in terms of being known from the type-gathering, their collection long years ago and as topotype, their distribution in very small area, providing data of unknown morphological characteristics in the Flora of Turkey. They are also presented with their threatened categories.
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    An Investigation on Habitat and Population Properties of Local Endemic Erodium somanum
    Oskay, D; Altan, Y
    Habitat and population properties of Erodium somanum with also changing these characters timely were investigated. Distribution soils of this species are slightly alkaline, without salt and generally limes structure, adequate for ferrous but poor for phosphor. Climate type is semi-arid upper Mediterranean especially winter is cool. Distribution area of population is approximately 5 km(2). Population density calculated as 3.04. According to results of size and sexual dispersal of individuals, a total of 83% of plants in spreading area between 0 to 25 cm(2) were determined not yet attained sexual mature. The ratio of sex index in population was 1.26, average of the demographic increase of the flowering season for each year was only 35%. We suggested this species to CR B1ab(i) + (iii) in endangered groups of IUCN criteria based on the data that obtained from population studies.
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    Species richness effects on grassland recovery from drought depend on community productivity in a multisite experiment
    Kreyling, J; Dengler, J; Walter, J; Velev, N; Ugurlu, E; Sopotlieva, D; Ransijn, J; Picon-Cochard, C; Nijs, I; Hernandez, P; Güler, B; von Gillhaussen, P; De Boeck, HJ; Bloor, JMG; Berwaers, S; Beierkuhnlein, C; Arfin Khan, MAS; Apostolova, I; Altan, Y; Zeiter, M; Wellstein, C; Sternberg, M; Stampfli, A; Campetella, G; Bartha, S; Bahn, M; Jentsch, A
    Biodiversity can buffer ecosystem functioning against extreme climatic events, but few experiments have explicitly tested this. Here, we present the first multisite biodiversityxdrought manipulation experiment to examine drought resistance and recovery at five temperate and Mediterranean grassland sites. Aboveground biomass production declined by 30% due to experimental drought (standardised local extremity by rainfall exclusion for 72-98 consecutive days). Species richness did not affect resistance but promoted recovery. Recovery was only positively affected by species richness in low-productive communities, with most diverse communities even showing overcompensation. This positive diversity effect could be linked to asynchrony of species responses. Our results suggest that a more context-dependent view considering the nature of the climatic disturbance as well as the productivity of the studied system will help identify under which circumstances biodiversity promotes drought resistance or recovery. Stability of biomass production can generally be expected to decrease with biodiversity loss and climate change.