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Articles 1 - 30 of 119
Full-Text Articles in Life Sciences
The Revision Of Genus Seseli (Umbelliferae) In Turkey, Ebru Doğan Güner, Hayri̇ Duman
The Revision Of Genus Seseli (Umbelliferae) In Turkey, Ebru Doğan Güner, Hayri̇ Duman
Turkish Journal of Botany
Seseli L. is represented by 12 taxa (species and subspecies) in the Flora of Turkey. On the basis of morphological examination and field investigation, we have revised the genus Seseli in Turkey. The following are provided for each taxon: a description, along with the complete synonymy and notes on nomenclature, geographical distribution, habitat, IUCN conservation status assessment, and selected materials examined. Two new species from Turkey, Seseli marashica E.Doğan & H.Duman and S. serpentina B.L.Burtt ex H.Duman & E.Doğan, are also described. One taxon is reduced to synonymy: S. paphlagonicum Pimenov & Kljuykov is a synonym of S. gummiferum Pallas …
New Fungal Records For The Turkish Mycota From Trabzon, Ertuğrul Sesli̇, Stephan Helfer
New Fungal Records For The Turkish Mycota From Trabzon, Ertuğrul Sesli̇, Stephan Helfer
Turkish Journal of Botany
Fungal specimens were collected in Trabzon Province in 2010 and 2012. Taxonomical studies were performed in our laboratory and in the Royal Botanic Garden Edinburgh. According to the results, Entoloma noordeloosi Hauskn., Inocybe lutescens Velen., and Tricholoma saponaceum var. squamosum (Cooke) Rea are recorded for the first time for the Turkish Mycota. The new records are illustrated, briefly described, and discussed.
Functions And Toxicity Of Cadmium In Plants: Recent Advances And Future Prospects, Tuan Anh Tran, Losanka Petrova Popova
Functions And Toxicity Of Cadmium In Plants: Recent Advances And Future Prospects, Tuan Anh Tran, Losanka Petrova Popova
Turkish Journal of Botany
Heavy metals are important environmental pollutants and their toxicity is a problem of increasing significance for ecological, evolutionary, nutritional, and environmental reasons. Of all non-essential heavy metals, cadmium (Cd) is perhaps the metal that has attracted the most attention in soil science and plant nutrition due to its potential toxicity to humans, and also its relative mobility in the soil-plant system. This review emphasises Cd toxicity on plants with regards to ecological, physiological, and biochemical aspects. It summarises the toxic symptoms of Cd in plants (i.e. growth and plant development, alterations in photosynthesis, stomatal regulation, enzymatic activities, water relation, mineral …
Anther Development And Cytochemistry In Asphodelus Aestivus (Asphodelaceae), Fi̇li̇z Vardar, Işil İsmai̇loğlu, Meral Ünal
Anther Development And Cytochemistry In Asphodelus Aestivus (Asphodelaceae), Fi̇li̇z Vardar, Işil İsmai̇loğlu, Meral Ünal
Turkish Journal of Botany
Asphodelus aestivus Brot. (Asphodelaceae) anthers were analysed to provide a detailed understanding of the events that lead to pollen grain development, accompanied by cytochemical observations at different ontogenic stages. An anther locule of A. aestivus was bordered by 4 different layers: the tapetum, the middle layer, the endothecium, and the epidermis. At the tetrad stage, secretory tapetal cells enlarged maximally, while they showed degeneration at the young microspore stage. During the course of the degeneration, vacuolisation and reduction in the volume were conspicuous. Cytochemical analysis revealed that tapetal cells presented an intense reaction with regard to protein, insoluble polysaccharides, and …
Investigating Phosphorus And Turbidity Removal Efficiencies Of Main Aquatic Vegetation Species In The Lower Kelkit Basin Of Turkey, Ekrem Buhan, Hakan Mete Doğan, Sali̇ha Di̇ri̇m Buhan, Sai̇m Özdemi̇r, Fati̇h Polat, Çi̇sem Ni̇ldem Doğan
Investigating Phosphorus And Turbidity Removal Efficiencies Of Main Aquatic Vegetation Species In The Lower Kelkit Basin Of Turkey, Ekrem Buhan, Hakan Mete Doğan, Sali̇ha Di̇ri̇m Buhan, Sai̇m Özdemi̇r, Fati̇h Polat, Çi̇sem Ni̇ldem Doğan
Turkish Journal of Botany
In this study, we researched the main aquatic vegetation (AV) species and their orthophosphate and turbidity removal efficiencies in the Lower Kelkit Basin of Turkey. We chose an experimental area (1650 m^2) in the field and determined orthophosphate (mg/L) and turbidity (NTU) variables at the charging and discharging points between November 2005 and March 2006. We also applied an experimental design including 9 treatments and 3 replications in aquarium conditions. Orthophosphate (mg/L) contents of each aquarium were measured at 6 time periods (initial measurement and days 1, 4, 9, 16, and 25). Ceratophyllum demersum L., Cladophora glomerata (L.) Kützing, Lemna …
Asperula Anatolica (Rubiaceae), A New Species From South-East Anatolia, Turkey, Meryem Şeker
Asperula Anatolica (Rubiaceae), A New Species From South-East Anatolia, Turkey, Meryem Şeker
Turkish Journal of Botany
A new species, Asperula anatolica M.Ozturk (Rubiaceae), is described from south-east Turkey. A. anatolica grows on limestone bedrock, in Uludere District (C9 Şırnak Province). It is an endemic confined to south-east Anatolia, and it is related to A. comosa Schönb.-Tem in the section Cruciana. Asperula anatolica is distinct from a closely allied species, A. comosa, by its inflorescence, indumentum, corolla lobes and shape, bracts, bracteoles, internodes, seed coat surface, and pollen grains. Photos of the new species are provided, and observations on the population are discussed. Special attention is also given to its ecology and conservation status. In addition, pollen …
The Comparison Of Grime’S Strategies Of Plant Taxa In Hacı Osman Forest And Bafra Fish Lakes In The Central Black Sea Region Of Turkey, Rena Hüseyi̇nova, Mahmut Kilinç, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n
The Comparison Of Grime’S Strategies Of Plant Taxa In Hacı Osman Forest And Bafra Fish Lakes In The Central Black Sea Region Of Turkey, Rena Hüseyi̇nova, Mahmut Kilinç, Hamdi̇ Güray Kutbay, Dudu Duygu Kiliç, Ali̇ Bi̇lgi̇n
Turkish Journal of Botany
The main aim of this study was to compare Grime's strategies in 91 plant taxa occurring from the eastern to the western part of the central Black Sea region of northern Turkey (Samsun). To do this, 45 sample plots were taken from different community types (from swamp forests to halophytic communities), and the strategies of plant species were compared with each other. Many tree and shrub species present in Hacı Osman Forest, a protected swamp forest, exhibited a purely competitive (C) strategy; some other tree and shrub species exhibited secondary strategies such as competitive/competitive stress-tolerant (C/CS) and competitive/competitive ruderal (C/CR). …
Localization And Distribution Of Nickel And Other Elements In In-Vitro Grown Alyssum Corsicum Exhibiting Morphological Changes In Trichomes: Initial Insights Into Molecular Mechanisms Of Nickel Hyperaccumulation, Seni̇ha Selcen Babaoğlu Aydaş, Leyla Açik, Danika Leduc, Nezaket Adigüzel, Şeküre Şebnem Elli̇altioğlu, Zeki̇ye Suludere, Yusuf Kağan Kadioğlu
Localization And Distribution Of Nickel And Other Elements In In-Vitro Grown Alyssum Corsicum Exhibiting Morphological Changes In Trichomes: Initial Insights Into Molecular Mechanisms Of Nickel Hyperaccumulation, Seni̇ha Selcen Babaoğlu Aydaş, Leyla Açik, Danika Leduc, Nezaket Adigüzel, Şeküre Şebnem Elli̇altioğlu, Zeki̇ye Suludere, Yusuf Kağan Kadioğlu
Turkish Journal of Botany
Alyssum corsicum Duby is a candidate plant used for phytomining and phytoremediation studies with its high Ni-accumulating ability of the aboveground tissues. Metal localization and concentration by hyperaccumulator plants and the physiological basis of these phenomena have been of great interest in recent years. A. corsicum seeds were grown at different concentrations of Ni in Murashige and Skoog medium. Multielement concentrations of the plant roots and shoots were determined by polarized energy dispersive X-ray fluorescence. Ni, Ca, Mg, and Fe localization and concentration at the upper and lower leaf surfaces were determined by scanning electron microscopy coupled with the energy-dispersive …
Shortcut To Long-Distance Developing Of A Tissue Culture Medium: Micropropagation Of Mature Almond Cultivars As A Case Study, Mehmet Nuri̇ Nas, Yüksel Bölek, Nevzat Sevgi̇n
Shortcut To Long-Distance Developing Of A Tissue Culture Medium: Micropropagation Of Mature Almond Cultivars As A Case Study, Mehmet Nuri̇ Nas, Yüksel Bölek, Nevzat Sevgi̇n
Turkish Journal of Botany
Culture medium development methods are time-consuming, laborious, and require a large amount of experimental materials. The Nas hypothesis for the development of a micropropagation medium offers a less time-consuming and a less laborious approach. According to this hypothesis, the composition of a culture medium for a particular species should resemble the seed composition. In accordance with this hypothesis, first, an almond culture medium [Nas Almond Medium (NAM)] was developed based on almond kernel composition. Then, using mature tissues of almond cultivars, the growth of cultures on NAM was compared to that on Murashige and Skoog medium (MS), Woody Plant Medium …
Callogenesis And Production Of Anthocyanin And Chlorophyll In Callus Cultures Of Vegetative And Floral Explants In Rosa Gallica And Rosa Hybrida (Rosaceae), Roshanak Tarrahi, Farkhondeh Rezanejad
Callogenesis And Production Of Anthocyanin And Chlorophyll In Callus Cultures Of Vegetative And Floral Explants In Rosa Gallica And Rosa Hybrida (Rosaceae), Roshanak Tarrahi, Farkhondeh Rezanejad
Turkish Journal of Botany
Callogenesis using vegetative (leaf, stem, petiole) and floral (petal, pistil, anther) explants of Rosa gallica and R. hybrida was investigated using different combinations of 2,4-dichlorophenoxyacetic acid, 6-benzylaminopurine, and gibberellic acid on modified Murashige and Skoog medium. The highest callogenesis was obtained on Murashige and Skoog medium containing ratios of 2 and 3 mg L^{-1} of 2,4-dichlorophenoxyacetic acid to 1 mg L^{-1} of 6-benzylamino purine in both species depending on type of explant. Stem explants in R. gallica initiated callus after 4 days while the other explants in R. gallica and all explants in R. hybrida showed the greatest percentage of …
Ranking Of 11 Coastal Halophytes From Salt Marshes In Northwest Turkey According Their Salt Tolerance, Christian Zörb, Ali̇ Sümer, Ali̇ Sungur, Timothy J. Flowers, Hasan Özcan
Ranking Of 11 Coastal Halophytes From Salt Marshes In Northwest Turkey According Their Salt Tolerance, Christian Zörb, Ali̇ Sümer, Ali̇ Sungur, Timothy J. Flowers, Hasan Özcan
Turkish Journal of Botany
Salt-affected soils with high electrolyte contents limit the development of the majority of plants and serve as a habitat only for such species (halophytes) that can survive the conditions. To date, there is still much that is unknown about the physiological mechanisms, including ion relationships, that make plants salt-resistant. The primary aim of this study was to evaluate a method of ranking plants for their salt tolerance. A total of 11 coastal halophytes of the Kavak Delta were evaluated for their ability to cope with different soil salinities. For this, electrical conductivities of soils (of up to 135 dS m^{-1}) …
Agrophysiological And Biochemical Properties Associated With Adaptation Of Medicago Sativa Populations To Water Deficit, Mohamed Farissi, Abdelaziz Bouizgaren, Mustapha Faghire, Adnane Bargaz, Cherki Ghoulam
Agrophysiological And Biochemical Properties Associated With Adaptation Of Medicago Sativa Populations To Water Deficit, Mohamed Farissi, Abdelaziz Bouizgaren, Mustapha Faghire, Adnane Bargaz, Cherki Ghoulam
Turkish Journal of Botany
The effect of water deficit on growth and some physiological and biochemical parameters related to water deficit tolerance was studied in 4 Moroccan alfalfa Medicago sativa L. populations that originated from the mountains and oases of Morocco. The experiment was conducted in greenhouse conditions. Seeds were allowed to germinate in pots filled with sand and peat at a 2:1 ratio, respectively. After 1 month of sowing, the plants were subjected to 3 water regimes: optimal irrigation (75% of field capacity, FC), moderate water deficit (50% FC), and severe water deficit (25% FC). At 45 days of stress, the plants were …
Euglenozoa Occurring In Adzopé Reservoir, Côte D’Ivoire, Ble Alexis Tardy Kouassi, Allassane Ouattara, Kouhete Philippe Da
Euglenozoa Occurring In Adzopé Reservoir, Côte D’Ivoire, Ble Alexis Tardy Kouassi, Allassane Ouattara, Kouhete Philippe Da
Turkish Journal of Botany
The Euglenozoa flora of the Adzope Reservoir in Côte d'Ivoire was investigated from January to December 2005. The species composition of the assemblage was compiled, accompanied by illustrations. Forty-four taxa were identified in the temporal survey. Ten taxa (22.22%) are new for Côte d'Ivoire. The taxonomic structure presents 22.32% of the species common to the freshwater of West Africa, with most of the taxa (89.5%) found to be cosmopolitan. An endemic taxon, Trachelomonas pisciformis var. bicoronata Coute & Iltis (Euglenaceae), was observed. The assemblage was dominated by Trachelomonas Ehrenberg and Phacus Ehrenberg, which represented 47.72% and 29.54% of identified taxa, …
Protective Role Of Foliar-Applied Nitric Oxide In Triticum Aestivum Under Saline Stress, Farhana Kausar, Muhammad Shahbaz, Muhammad Ashraf
Protective Role Of Foliar-Applied Nitric Oxide In Triticum Aestivum Under Saline Stress, Farhana Kausar, Muhammad Shahbaz, Muhammad Ashraf
Turkish Journal of Botany
A study was conducted to assess whether foliar-applied nitric oxide (NO) could alleviate the adverse effects of salt stress on wheat (Triticum aestivum L.). Four sodium nitroprusside levels (control [water spray] and 0.05, 0.10, and 0.15 mM) were sprayed as a donor of NO on the leaves of cultivar S-24 plants grown under nonsaline and saline conditions (150 mM NaCl). Data for growth and yield, chlorophyll contents, activities of antioxidants, and concentrations of mineral nutrients were recorded. Root-medium salinity adversely affected shoot and root dry weight, shoot length, and yield attributes of the wheat plants while it enhanced the activities …
Three New Species Of Basidiomycetous Fungi From India, Babita Kumari, Narinder Singh Atri, Ramesh Chandra Upadhyay
Three New Species Of Basidiomycetous Fungi From India, Babita Kumari, Narinder Singh Atri, Ramesh Chandra Upadhyay
Turkish Journal of Botany
In this paper, 2 lepiotaceous mushrooms [Lepiota indica sp. nov. and Lepiota attenuispora sp. nov. (Agaricaeae)] and 1 Limacella magna sp. nov. in the Amanitaceae are described. Lepiota indica has scurfy brownish carpophores, minute spores, and chains of golden brown-walled pileal elements. Lepiota attenuispora has a shaggy appearance, an appendiculate veil of the pileus margin, and a stipe sheathed with soft cottony scales. Limacella magna is a species characterized by prominent brown scales on the pileus and stipe, presence of a glutinous layer, and a trichodermal pileus cutis.
Phylogenetic Analysis Of The Genus Stachys Sect. Eriostomum (Lamiaceae) In Turkey Based On Nuclear Ribosomal Its Sequences, Ekrem Dündar, Ekrem Akçi̇çek, Tuncay Di̇rmenci̇, Şaki̇r Akgün
Phylogenetic Analysis Of The Genus Stachys Sect. Eriostomum (Lamiaceae) In Turkey Based On Nuclear Ribosomal Its Sequences, Ekrem Dündar, Ekrem Akçi̇çek, Tuncay Di̇rmenci̇, Şaki̇r Akgün
Turkish Journal of Botany
Morphological revision and phylogenetic analysis of Stachys L. sect. Eriostomum (Hoffmanns. & Link) Dumort. (Lamiaceae) based on nuclear ribosomal internal transcribed spacer (nrITS) sequences were conducted. Morphological analysis confirmed the previous arrangements of 3 subsections, i.e. Germanicae R.Bhattacharjee, Creticae R.Bhattacharjee, and Spectabiles R.Bhattacharjee, while suggesting some status changes and new records that were also confirmed by the phylogenetic analysis. The phylogenetic analysis suggested, however, some arrangements different from those indicated by morphology. Two subsections, i.e. Creticae and Germanicae-Spectabiles, instead of 3 were observed in the phylogenetic tree. The tree also suggested that 9 Stachys cretica L. subspecies form a polyphyletic …
Allium Cyrilli Complex (Sect. Melanocrommyum) In Turkey, Fatma Neri̇man Özhatay, İlker Genç
Allium Cyrilli Complex (Sect. Melanocrommyum) In Turkey, Fatma Neri̇man Özhatay, İlker Genç
Turkish Journal of Botany
As a part of a revisional study of the genus Allium L. sect Melanocrommyum Webb et Berthel. in Turkey, detailed studies were conducted on 3 very closely related and taxonomically difficult species cited in the Flora of Turkey: Allium cyrilli Ten., A. atropurpureum Waldst. & Kit., and A. decipiens Fisch. ex Schult. & Schult. f., to clarify their occurrence in Turkey and their taxonomy. The results of this study show that A. atropurpureum and A. decipiens do not occur in Turkey. On the other hand, A. cyrilli is represented by 3 subspecies of which 2 are new for science: subsp. …
The Revision Of The Genus Oxytropis (Leguminosae) In Turkey, Seher Karaman Erkul, Zeki̇ Aytaç
The Revision Of The Genus Oxytropis (Leguminosae) In Turkey, Seher Karaman Erkul, Zeki̇ Aytaç
Turkish Journal of Botany
A taxonomic revision of the genus Oxytropis DC. (Leguminosae) in Turkey is presented. According to the recent literature, the genus had 13 taxa in Turkey; however, at the end of our studies the number was reduced to 11. It was determined that Oxytropis engizekensis Duman & Vural is a synonym of O. persica Boiss., and O. fominii Grossh. is a synonym of O. argyroleuca Bornm. Red List categories of the taxa were re-evaluated according to our results based on IUCN Red List categories. The Red List categories of O. pallasii Pers. and O. pilosa (L.) DC., which are ascribed as …
Leaf Epidermis Morphology Of Some Onosma (Boraginaceae) Species From Turkey, Öznur Ergen Akçi̇n, Gülcan Şenel, Yaşar Akçi̇n
Leaf Epidermis Morphology Of Some Onosma (Boraginaceae) Species From Turkey, Öznur Ergen Akçi̇n, Gülcan Şenel, Yaşar Akçi̇n
Turkish Journal of Botany
The leaf epidermis of 14 Onosma L. species was examined by light and scanning electron microscopy (SEM). The leaf characters studied showed some variations. Morphologic features of the epidermal cells such as shape, structure of the anticlinal walls, stomatal size, outer stomatal rims, peristomatal rims, and apertures were summarised in the examined taxa. It was found that these characters are variable in the genus but usually they are stable within a species. Epidermal cells of the investigated taxa are polygonal, elongated, or irregular. Anticlinal walls of the epidermal cells are generally straight to curved and repand. Apertures are long, ellipsoidal, …
Analysis Of Airborne Pollen Grains In Denizli, Aykut Güvensen, Ali̇ Çeli̇k, Bülent Topuz, Müni̇r Öztürk
Analysis Of Airborne Pollen Grains In Denizli, Aykut Güvensen, Ali̇ Çeli̇k, Bülent Topuz, Müni̇r Öztürk
Turkish Journal of Botany
Airborne pollen distribution in Denizli Province was measured volumetrically during 2 consecutive years, 2005 and 2006, on a weekly basis. A total of 11,981 pollen grains/m^3 belonging to 42 taxa were determined. In 2005 the total was 5368 pollen grains/m^3 and in 2006 it was 6613 pollen grains/m^3. Among the taxa recorded, 26 belonged to arboreal and 16 to nonarboreal taxa. At the end of the 2 years total pollen counts comprised 79.68% arboreal, 19.48% nonarboreal, and 0.84% unidentified taxa. The number of pollen grains/m^3 among arboreal plants was as follows: Pinaceae (24.19%), Cupressaceae/Taxodiaceae (15.99%), Olea europaea (11.35%), Quercus spp. …
Patterns Of Aquatic Macrophyte Species Composition And Distribution In Bulgarian Rivers, Gana Gecheva, Lilyana Yurukova, Svetoslav Cheshmedjiev
Patterns Of Aquatic Macrophyte Species Composition And Distribution In Bulgarian Rivers, Gana Gecheva, Lilyana Yurukova, Svetoslav Cheshmedjiev
Turkish Journal of Botany
The composition of aquatic bryophyte and vascular plant assemblages, and 4 environmental variables (water velocity, shading, mean depth, and substrate type), together with altitude, ecological status, and river type were monitored at 223 sites along 204 rivers during 2009 in the Pontic Province and Eastern Balkan Ecoregions, Bulgaria. The relationships between macrophytes themselves and the parameters studied were tested. Forty-nine bryophytes and 86 vascular plants were identified. Canonical correspondence analysis (CCA) showed that aquatic bryophytes and vascular plants are in inverse correlation. Bryophytes occurred mainly in conditions of higher altitude and ecological status; at the same time vascular plants were …
Spatial Pattern Analysis Of Peganum Harmala On The Salted Lower Chelif Plain, Algeria, Adda Ababou, Mohammed Chouieb, Abdelkader Bouthiba, Djamel Saidi, Mahfoud M'Hamedi Bouzina, Khalladi Mederbal
Spatial Pattern Analysis Of Peganum Harmala On The Salted Lower Chelif Plain, Algeria, Adda Ababou, Mohammed Chouieb, Abdelkader Bouthiba, Djamel Saidi, Mahfoud M'Hamedi Bouzina, Khalladi Mederbal
Turkish Journal of Botany
Peganum harmala L. (Zygophyllaceae), native to arid and semiarid rangeland, has been widely studied biochemically, pharmaceutically, and medicinally, but is largely unknown ecologically. In the lower Chelif, Algeria, this plant is largely present and shows a clear clumped pattern, which indicates the strong effects of environmental conditions. Our redundancy analysis showed that the geographic distribution of this species was positively correlated with sand and pH and negatively correlated with conductivity, Na^+, and clay. The Gaussian model suggested that 9.4 mmhos/cm conductivity and sand contents greater than 40% are optimum for this plant. The spatial distribution map obtained through the kriging …
Heterostyly In Linum Aretioides, Aykut Güvensen, Özcan Seçmen, Serdar Gökhan Şenol
Heterostyly In Linum Aretioides, Aykut Güvensen, Özcan Seçmen, Serdar Gökhan Şenol
Turkish Journal of Botany
The petal width; sepal, pistil, and stamen lengths; and changes in pollen sizes associated with heterostyly of different morphs in populations of Linum aretioides Boiss. were investigated. Fruit sets were compared in 2 populations and it was investigated whether the Bozdağ population has a heteromorphic incompatibility system. It was observed that the stamen lengths of thrum morphs of Bozdağ were shorter than those of thrum morphs of Babadağ. Pistil lengths of both morphs of Bozdağ were longer than those of morphs of Babadağ. Pollen shapes of both morphs were prolate-spheroidal and subprolate, respectively, in the Bozdağ population and subprolate in …
Physiological And Ultrastructural Studies On Calcium Oxalate Crystal Formation In Some Plants, Fayza Faheed, Ahmed Mazen, Shereen Abd Elmohsen
Physiological And Ultrastructural Studies On Calcium Oxalate Crystal Formation In Some Plants, Fayza Faheed, Ahmed Mazen, Shereen Abd Elmohsen
Turkish Journal of Botany
Results from light, scanning, and transmission electron microscopic examination of CaOx crystal formation in 2 plant species, namely Corchorus olitorius L. and Malva parviflora L., revealed the presence of crystalline deposits. These deposits were of prismatic type in the case of C. olitorius and of druse type in the case of M. parviflora. Ultrastructurally, some differences were observed between crystal idioblast and noncrystal cells. Moreover, the effect of heavy metals and different calcium concentrations on the growth of calcium oxalate crystals in leaves of the 2 plants was investigated. Different analytical techniques were used to determine the influence of exogenous …
Stimulation Of The Production Of Hypericins In In Vitro Seedlings Of Hypericum Adenotrichum By Some Biotic Elicitors, Ömer Yamaner, Bengi̇ Erdağ, Cengi̇z Gökbulut
Stimulation Of The Production Of Hypericins In In Vitro Seedlings Of Hypericum Adenotrichum By Some Biotic Elicitors, Ömer Yamaner, Bengi̇ Erdağ, Cengi̇z Gökbulut
Turkish Journal of Botany
The goal of this work was to study the stimulating effects of mannan and pectin on the biosynthesis of hypericins in in vitro seedlings of Hypericum adenotrichum Spach. Seedlings of H. adenotrichum were grown on a modified MS medium containing mannan (10, 50, and 100 mg/L) or pectin (10, 50, and 100 mg/L) for 15 and 30 days. Seedlings of H. adenotrichum were extracted with methanol. The methanol extracts of the seedlings were analysed by HPLC to investigate the changes in hypericin and pseudohypericin levels. The best results were obtained by exposure to 50 mg/L mannan or pectin for 15 …
Effects Of Excess And Deficient Boron And Niacin On The Ultrastructure Of Root Cells In Daucus Carota Cv. Nantes, Hati̇ce Demi̇ray, Ayli̇n Eşi̇z Dereboylu
Effects Of Excess And Deficient Boron And Niacin On The Ultrastructure Of Root Cells In Daucus Carota Cv. Nantes, Hati̇ce Demi̇ray, Ayli̇n Eşi̇z Dereboylu
Turkish Journal of Botany
The effects of excess and deficient boron and niacin on vascular tissues of carrot roots (Daucus carota L. cv. Nantes) were investigated in plants grown in medium both rich and poor in boron and also boron with niacin. Five media were investigated: control (MS medium), boron-deficient MS medium, MS medium with excess boron, niacin-deficient MS medium, MS medium with niacin excess, and MS medium with excess boron and niacin. In anatomical cross sections, lignification was seen in middle lamellar pectins in the tracheary cells of boron deficit grown carrot roots, while in the other applications including excess boron lignification was …
Spindle Irregularities, Chromatin Transfer, And Chromatin Stickiness During Male Meiosis In Anemone Tetrasepala (Ranunculaceae), Pawan Kumar Rana, Puneet Kumar, Vijay Kumar Singhal
Spindle Irregularities, Chromatin Transfer, And Chromatin Stickiness During Male Meiosis In Anemone Tetrasepala (Ranunculaceae), Pawan Kumar Rana, Puneet Kumar, Vijay Kumar Singhal
Turkish Journal of Botany
Detailed cytological investigations performed in Anemone tetrasepala Royle from the Pangi Valley revealed the presence of various irregularities (spindle irregularities, chromatin transfer, chromatin stickiness, and nonsynchronous condensation of chromatin material) for the first time in the species that existed at diploid level (2n = 14). Spindle irregularities resulted in dyads, triads, polyads, and micronuclei in sporads during microsporogenesis and variable sized pollen grains and reduced fertility in pollen grains (85.38%). Direct fusion among proximate meiocytes resulted in the formation of syncyte pollen mother cells. Such syncytes yielded jumbo-sized pollen grains that were surely of unreduced nature in their genetic constitution. …
Size-Fractionated Phytoplankton And Nutrient Dynamics In The Inner Part Of İzmir Bay, Eastern Aegean Sea, Serkan Kükrer, Hasan Baha Büyükişik
Size-Fractionated Phytoplankton And Nutrient Dynamics In The Inner Part Of İzmir Bay, Eastern Aegean Sea, Serkan Kükrer, Hasan Baha Büyükişik
Turkish Journal of Botany
İzmir Bay has been one of most polluted bays of the Mediterranean for a long time. When the 'Big Channel Project' was completed in 2000, sewage flow into the bay ended. Hence, the influence of creeks, which are the only source of water transportation to the inner bay, was investigated in the current study. Monthly samples of creek water and seawater were taken. Basic water quality variables and nutrients were measured. In addition, the phytoplankton community was arrayed into size fractions to assess the contribution of each size fraction to biomass and pigment concentrations. Analyses showed that the creek waters …
A New Alien Record For The Flora Of Turkey: Sigesbeckia Pubescens (Compositae), Fergan Karaer, Sali̇h Terzi̇oğlu
A New Alien Record For The Flora Of Turkey: Sigesbeckia Pubescens (Compositae), Fergan Karaer, Sali̇h Terzi̇oğlu
Turkish Journal of Botany
An Asian species, Sigesbeckia pubescens (Makino) Makino (Compositae), is recorded as an alien for the flora of Turkey. The specimens were collected from A8 Artvin and a distribution map for the species is provided.
Dianthus Vanensis (Caryophyllaceae), A New Species From Turkey, Ahmet İlçi̇m, Lütfi̇ Behçet, Muzaffer Mükemre
Dianthus Vanensis (Caryophyllaceae), A New Species From Turkey, Ahmet İlçi̇m, Lütfi̇ Behçet, Muzaffer Mükemre
Turkish Journal of Botany
Dianthus vanensis Behçet & İlçim is described as a new species. It is confined to Çatak District (Van) in Eastern Anatolia, Turkey. The diagnostic characters and taxonomic comments on the species are given. Notes are also presented on its ecology. A distribution map of new and related species is also provided.