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Articles 1621 - 1645 of 1645
Full-Text Articles in Life Sciences
Determination Of Some Low Molecular Weight Carbohydrates In Thefruits Of Wild Cherry Laurel (Laurocerasus Officinalis Roem.)Using Gas Chromatography, F. Ahmet Ayaz, Asım Kadioğlu, Sema Hayirlioğlu-Ayaz
Determination Of Some Low Molecular Weight Carbohydrates In Thefruits Of Wild Cherry Laurel (Laurocerasus Officinalis Roem.)Using Gas Chromatography, F. Ahmet Ayaz, Asım Kadioğlu, Sema Hayirlioğlu-Ayaz
Turkish Journal of Botany
Some low-molecular-weight carbohydrates extracted with ethanol and water from the fruits of Laurocerasus officinalis Roem. ( Rosaceae), from two different regions in Trabzon, were analysed using gas chromatography. In one population, the analysis in the ethanol extraction showed the occurence of fructose, glucose, sorbitol and sucrose in concentrations (w/w) of 25.20; 23.00; 14.00 and 0.024 %, respectively. The same sugars, in the water extraction were found in concentrations (w/w) of 24.62; 25.59; 7.43 and 0.114 %, respectively. In the other population, these values were 25.44; 23.23; 14.24 and 0.023 for the ethanol extrac-tion, and 24.74; 24.98; 7.18 and 0.108 % …
Pollen Flora Of Pakistan - Viii Leguminosae (Subfamily: Papilionoideae), Anjum Perveen, Muhamad Qaiser
Pollen Flora Of Pakistan - Viii Leguminosae (Subfamily: Papilionoideae), Anjum Perveen, Muhamad Qaiser
Turkish Journal of Botany
The pollen morphology of 157 species, representing 37 genera, of the subfamily Papilionoideae from Pakistan have been examined using light and scanning electron microscopy. Papilionoideae is a eurypalynous subfamily. The pollen grains are generally free, radially symmetrical, isopolar, mostly tricolporate, rarely colpate or porate. The shape is commonly prolate to sub-prolate, or prolate-spherodial, less commonly to oblate-spheroidal or sub-oblate, often perprolate. The ora is commonly la-longate or circular, rarely lolongate. Colpal membrane is psilate to sub-psilate or granulated, often scabrate. The sexine is thicker than or as thick as the nexine. A reticulate tectum type is the most common. However, …
Seasonal Variations Of Phytoplankton Blooms In Suat Ugurlu (Samsun - Turkey), Arif Gönülol, Olcay Obali
Seasonal Variations Of Phytoplankton Blooms In Suat Ugurlu (Samsun - Turkey), Arif Gönülol, Olcay Obali
Turkish Journal of Botany
The seasonal variations in phytoplankton blooms in Suat Uğurlu Reservoir were studied between July 1992 and De-cember 1993. In certain months, the species Asterionella formosa Hassal, Cyclotella planctonica Brunthaler, Melosira granulata (Ehr.) Ralfs (Bacillariophyta); Pediastrum simplex Meyen, Pandorina morum Borry (Chlorophyta) and Ceratium hirundinella (O F. Müller) Schrank (Dinophyta) produced blooms in the lake. During the study period, the measured N/P ratio in the water varied from 10.3 mg/lt to 62.5. In accordance with these variations, P. simplex, P. morum and C. hirundinella, which consume high levels of phosphate, produced blooms in summer, whereas the blooms in winter were produced …
Lichen Flora Of Sakarya Province (Turkey), Arzu Çi̇çek, Ayşen Özdemi̇r Türk
Lichen Flora Of Sakarya Province (Turkey), Arzu Çi̇çek, Ayşen Özdemi̇r Türk
Turkish Journal of Botany
This study of the lichen flora of Sakarya Province determined 159 species, which are listed along with their substrata.
The Flora Of Dörtyol And Erzin District Of Hatay Province In Turkey, Necattin Türkmen, Atabay Düzenli̇
The Flora Of Dörtyol And Erzin District Of Hatay Province In Turkey, Necattin Türkmen, Atabay Düzenli̇
Turkish Journal of Botany
The plants listed in this study were collected in the districts of Dörtyol and Erzin (Hatay) between 1989 and 1992. The study area, situated at the middle of Amanos Mountains, has a climate typical of its topographic structure and geographical position in the Mediterranean region. During floristic studies, 629 vascular plant taxa, belonging to 328 genera and 98 families were de-termined. The distribution of these taxa according to phytogeographic regions are as follows: 29.9% Mediterranean, 10.3% Euro-Siberian, 5.8% Irano-Turanian and 54.0% cosmopolitan and unknown. The number of endemic taxa are 47 (15 of them is local en-demic) and the endemism …
Pollen Flora Of Pakistan - Xi. Leguminosae(Subfamily: Mimosoideae), Anjum Perveen, Mohammad Qaiser
Pollen Flora Of Pakistan - Xi. Leguminosae(Subfamily: Mimosoideae), Anjum Perveen, Mohammad Qaiser
Turkish Journal of Botany
The pollen morphology of 14 species representing 5 genera of the subfamily Mimosoideae from Pakistan has been examined using light and scanning electron microscopy. Mimosoideae are eurypalynous subfamily. The pollen grains are united (polyads) or free. Single grains are tricolporate and triangular - trilobed. The pollen morphology of the subfamily is significantly useful at generic and tribal level. The 3 pollen types recognized ie, Acacia nilotica - type, Mimlosa hamata - type and Prosopis juliflora - type, correspond closely with tribal classifications.
Phytosociological And Ecological Structure Of Fraxinus Angustifoliasubsp. Oxycarpa Forests In The Central Black Sea Region, Hamdi Güray Kutbay, Mahmut Kilinç, Ali Kandemi̇r
Phytosociological And Ecological Structure Of Fraxinus Angustifoliasubsp. Oxycarpa Forests In The Central Black Sea Region, Hamdi Güray Kutbay, Mahmut Kilinç, Ali Kandemi̇r
Turkish Journal of Botany
Fraxinus angustifolia Vahl. subsp. oxycarpa (Bieb. ex Willd). Franco & Rocha Afonso forests formed pure stands along the alluvial delta of the Central Black Sea Region. These forests represent hygrophyllous azonal formations. This species usually forms mixed stands with other deciduous species in other regions. In this study the phytosociological structure and soil characteristics of F. angustifolia subsp. oxycarpa forests were investigated. Nutrient concentrations in the leaves of the dominant species F. angustifolia subsp. oxycarpa were also studied during mid-growing season and senescence. It was determined that nutrient concentrations tended to decrease during senescence.
A Study On The Benthic Algae Of Uzungöl (Trabzon), Bülent Şahi̇n
A Study On The Benthic Algae Of Uzungöl (Trabzon), Bülent Şahi̇n
Turkish Journal of Botany
The composition of the benthic algal communities and seasonal changes in the densities of the epipelic algae of Uzungöl Lake from April, 1991, to March, 1993, were studied. While the maximum density of the epipelic community was found to be 131111 cells/cm 2 at station I in April, 1991 the maximum density at station II in November, 1991, was 64581 cells/cm 2 . Bacillariophyta was dominant in the benthic algal population. The main epipelic diatoms were Amphora ovalis Kütz. (Cym-bellaceae), Ceratoneis arcus Kütz. (Fragilariaceae), Cymbella minuta Hilse ex Rabh. (Cymbellaceae), Navicula cryptocephala var. veneta (Kütz.) and Grun. and N. radiosa …
Lichens Of The Akşehir District (Konya), Feray Karabulut, A. Özdemir Türk
Lichens Of The Akşehir District (Konya), Feray Karabulut, A. Özdemir Türk
Turkish Journal of Botany
Eighty-nine lichen species belonging to 33 genera from Aksehir District of Konya were determined. Staurothele frustulenta Vainio is a new record for the lichen flora of Turkey.
New Floristic Records For Square B5, Necati Çeli̇k, Erol Dönmez
New Floristic Records For Square B5, Necati Çeli̇k, Erol Dönmez
Turkish Journal of Botany
No abstract provided.
Effect Of Salt Stress And Synthetic Hormone Polystimuline K Onthe Photosynthetic Activity Of Cotton ( Gossypium Hirsutum), Rena A. Ganieva, Surhay R. Allahverdiyev, Nilufar B. Guseinova, Halil I. Kavakli, Saeedeh Nafisi
Effect Of Salt Stress And Synthetic Hormone Polystimuline K Onthe Photosynthetic Activity Of Cotton ( Gossypium Hirsutum), Rena A. Ganieva, Surhay R. Allahverdiyev, Nilufar B. Guseinova, Halil I. Kavakli, Saeedeh Nafisi
Turkish Journal of Botany
The effects of Polystimuline K (PS-K), as a cytokinin analogue, on delayed light component state (DF), intermittent fluorescence (IF) and chlorophyll (Chl) a/b ratio was investigated in the leaves of different genotypes of cotton ( Gossypium hirsutum L.) under salt stress (155 mM Na Cl) for different periods of time. It was shown that in the early perioid of salt stress, DF and IF amplitudes are decreased, which is indicative of a Photosystem II (PS II) activity decrease. It is possibly related to the damage of chlorophyll in the PS II donor site and the decrease of Chl b molecules …
Flora Of The Area Between Amasya Castleand The Villages Of Vermis And Yuvacik, Arzu Cansaran, Mustafa Aydoğdu
Flora Of The Area Between Amasya Castleand The Villages Of Vermis And Yuvacik, Arzu Cansaran, Mustafa Aydoğdu
Turkish Journal of Botany
This study covers the flora of the area between Amasya Castle and the villages of Vermis and Yuvacık. In 1994, 670 plant specimens were collected in the study area and examined. At the end of the study, 75 families, 287 genera and 412 species were determined. The total number of taxa was found to be and 412 species were determined. The total number of taxa was found to be 420, 46 (10.95%) of which are endemic. The distribution rates of the specimens into phytogeographical regions are as follows: Irano-Turanian, 15.71%; Mediterranean, 9.52%; and Euro-Siberian, 7.38%.
Vegetation Mosaic Around The First Center Of Tourism Development In The Uludağ Mountain, Bursa-Turkey, Gürcan Güleryüz, Hülya Arslan, Mustafa Gökçeoğlu, Helmut Rehder
Vegetation Mosaic Around The First Center Of Tourism Development In The Uludağ Mountain, Bursa-Turkey, Gürcan Güleryüz, Hülya Arslan, Mustafa Gökçeoğlu, Helmut Rehder
Turkish Journal of Botany
In this study, the vegetation mosaic is determined by aerial photography and Geographical Information Systems (GIS) techniques around the first center of tourism development in the Uludağ Mountain. The cover of plant communities and vegetation types is calculated in both absolute values (ha) and as percentage (%) of the total research area. Dwarf shrub communities ( Vaccinium myrtillus Juniperus communis, Juniperus communis and Astragalus angustifoliis comm.) are dominant with a cover of 53%. There ore some environmental problems caused by misuse of the area. The ruderal formation is dominant on the disturbed lands. It is widespread around the hotels, at …
Some Macrofungi Species Of European Part Of Turkey, Georgi Stojchev, Ahmet Asan, Fahrettin Güci̇n
Some Macrofungi Species Of European Part Of Turkey, Georgi Stojchev, Ahmet Asan, Fahrettin Güci̇n
Turkish Journal of Botany
This study aims to determine macrofungi species of Thrace, the European part of Turkey. Samples were collected between the years 1985 and 1997. A total of 67 species were identified and are listed here in.
A New Aquatic Liverwort For The Flora Of Turkey, İsa Gökler, Veysel Aysel
A New Aquatic Liverwort For The Flora Of Turkey, İsa Gökler, Veysel Aysel
Turkish Journal of Botany
One of the aquatic liverworts namely, Riccia fluitans L. belonging to the class Marchantiopsida (Hepaticae) of the division Bryophyta is recorded for the first time from Turkey. The species was collected from Lake Kazan near Selçuk in İzmir.
The Effects Of Iba And Bap On In Vitro Shoot Production Of Almond(Amygdalus Communis L.), Songül Gürel, Yücel Gülşen
The Effects Of Iba And Bap On In Vitro Shoot Production Of Almond(Amygdalus Communis L.), Songül Gürel, Yücel Gülşen
Turkish Journal of Botany
In this study the possibilities of in vitro vegatitive propagation of almond ( Amygdalus communis L.) cv. Texas and cv. Nonpareil by shoot-tip culture were investigated. Different levels of IBA (0.0, 0.1 and 0.5 mg/l) and BAP (0.0, 0.5, 1.0, 2.0 and 3.0 mg/l) were tested by observing shoot development and growth during three successive stages, namely initiation, transplantation and multiplication. During the initiation stage, hormone-free medium or medium with low IBA (0.1 mg/l) only seemed favourable for shoot growth. During both the transplantation and multiplication stages, the combination of 0.1 mg/l IBA and 1.0 mg/l BAP was found to …
Development Of An Efficient Plant Regeneration System In Sunflower(Helianthus Annuus L.), Ekrem Gürel, Kemal Kazan
Development Of An Efficient Plant Regeneration System In Sunflower(Helianthus Annuus L.), Ekrem Gürel, Kemal Kazan
Turkish Journal of Botany
With the aim of developing an efficient plant regeneration system from cells or tissues of sunflower ( Helianthus annuus L.), we compared several regeneration protocols using different explant types and hormonal combinations. Somatic embryogenesis could be induced on cotyledon explants, especially from the basal (proximal) portion of the cotyledons, but genotypic vairation appeared to be the most critical factor for both somatic embryo and root production. Such a variation was more prominent when 10 different sunflower cultivars were compared for shoot production from shoot-tip explants. Further refinement of the culture conditions may be neceassary to improve the efficiency of somatic …
Liverworts ( Marchantiopsida) Of The Altindere Valley National Park, İsa Gökler
Liverworts ( Marchantiopsida) Of The Altindere Valley National Park, İsa Gökler
Turkish Journal of Botany
This investigation covers studies undertaken on the liverworts of the Altındere Valley National Park, including the historical Sumela Meryemana Monastery located in the town of Maçka, province of Trabzon. As a result, 33 species belonging to 16 families of the class Marchantiopsida (Hepaticae) of the division Bryophyta have been identified. Of these, Porella arboris-vitae (With.) Grolle, P. cordaeana (Hüb.) Moore, P. obtusata (Tayl.) Trev. and Lejeunea lamacerina (Steph.) Schiffn. are reported for the first time from the A4 square of Turkey.
New Records Of Vascular Plants For Northern Mt. Strandzha (Se Bulgaria), Chavdar Gussev, Cvetomir Denchev, Jordanka Koeva, Dolja Pavlova, Dimitar Dimitrov
New Records Of Vascular Plants For Northern Mt. Strandzha (Se Bulgaria), Chavdar Gussev, Cvetomir Denchev, Jordanka Koeva, Dolja Pavlova, Dimitar Dimitrov
Turkish Journal of Botany
This study comprises new chorological data of 54 Bulgarian vascular plants. The occurrence of Glyceria nemoralis (Uechtr.) Uechtr. & Koern. in Bulgaria is confirmed. Thirty-four taxa are new for the Bulgarian region of Mt. Strandzha. The occurrence of 20 species in the Bulgarian region of Mt. Strandzha is confirmed. In addition, the distribution of Knautia degenii Borbás ex Form. in Bulgaria is briefly discussed.
Two New Species To Turkey From Turkish Thrace: Mibora Minima (L.) Desv. (Gramineae) & Trifolium Ornithopodioides (L.) Sm. ( Leguminosae), Andrew Byfield, Neriman Özhatay
Two New Species To Turkey From Turkish Thrace: Mibora Minima (L.) Desv. (Gramineae) & Trifolium Ornithopodioides (L.) Sm. ( Leguminosae), Andrew Byfield, Neriman Özhatay
Turkish Journal of Botany
Mibora minima (L.) Desv. ( Gramineae) and Trifolium ornithopodioides (L.) Sm. ( Leguminosae) are added new to the Turkish flora from localities in Turkish Thrace. Their diagnostic characters are briefly described and their ecology and conservation discussed.
Effects Of Cytozyme Crop Plus On Lycopersicum Esculentum Mill. Plant Yield, Meliha Gemi̇ci̇, Avni Güven, Pervin Katmer
Effects Of Cytozyme Crop Plus On Lycopersicum Esculentum Mill. Plant Yield, Meliha Gemi̇ci̇, Avni Güven, Pervin Katmer
Turkish Journal of Botany
The effects of various concentrations of Cytozyme Crop Plus (CCP) on Lycopersicum esculentum Mill. plant yield have been examined in this study. Single doses of 50 and 100 ml per decare of CCP were pulverized on seedlings of 15 cm height after second flowering, which have been given normal care. In addition, 50 ml per decare has been aplied twice in a separate parcel. The data obtained from the three replicates organized according to random blocks trial pattern have been compared with the control. In the trial parcel where daily irrigation and care procedures were carried out, specific yield values …
Spectrophotometric Determination Of Chlorophyll - A, B And Totalcarotenoid Contents Of Some Algae Species Using Different Solvents, Şükran Dere, Tohit Güneş, Rıdvan Sivaci
Spectrophotometric Determination Of Chlorophyll - A, B And Totalcarotenoid Contents Of Some Algae Species Using Different Solvents, Şükran Dere, Tohit Güneş, Rıdvan Sivaci
Turkish Journal of Botany
In our study, chlorophyll a, chlorophyll b and the total amounts of carotenoids in Cladophora glomerata (L.) Kuetzing, Ulva rigita L., Codium tomentosum (Huds.) Stackh and Cladostephus verticillatus Ag. species were determined. Methanol, acetone and diethyl ether were used as solvents. The chlorophyll amount in Cladophora glomerata L. Kuetzing, species and carotenoids in Cladostephus verticillatus Ag. were found the highest. It was observed that sonication had no much contribution to the extraction.
Effects Of Salt Stress And Synthetic Hormone Polystimuline K Onphotosynthetic Activity Of Trianea Bogotensis Karst, Surhay Ragimoğlu Allahverdiev, Meltem Mavi̇tuna, Rena Gani̇eva, Saeedeh Nafisi
Effects Of Salt Stress And Synthetic Hormone Polystimuline K Onphotosynthetic Activity Of Trianea Bogotensis Karst, Surhay Ragimoğlu Allahverdiev, Meltem Mavi̇tuna, Rena Gani̇eva, Saeedeh Nafisi
Turkish Journal of Botany
In the present study the effect of kinetin like synthetic hormone Polystimuline K (PS-K) on photosynthetic activity of salt stressed Trianea bogotensis Karst (Hydrocharitaceae) has been shown. Chlorophyll variable fluorescence (Fv) and slow fluo- rescence (SF) have been used to investigate the sensitivity of Photosystem II (PS II) to different salt stress treatments (103, 155 and 344 mM), at different time courses (15, 30, 60, 360 and 720 minutes). Salt stress (155 mM NaCl) treatments of the seed- lings inhibited the SF magnitude approximately to 50 %. Pretreatment of seedlings for 30 minutes in 20 mg/l PS-K followed by salt …
A Study In The Seasonal Variation Of Phytoplankton Inhafik Lake (Sivas, Turkey), Sabri Kilinç
A Study In The Seasonal Variation Of Phytoplankton Inhafik Lake (Sivas, Turkey), Sabri Kilinç
Turkish Journal of Botany
The seasonal variations in composition of the phytoplankton of Hafik lake was studied from April 1986to June 1987. Ba- cillariophyta, Chlorophyta, and Cyanophyta were the most abundant components of the phytoplankton community. Chrysophyta, Cryptophyta, Dinophyta, and Euglenophyta were found in low numbers. Diatoms showed an increase in spring but were scarce in summer and autumn. Cyclotella meneghiniana Kuetz. and Cyclotella ocellata Pant. were the most frequent species. Chlorophyta was the next most abundant group and showed greater numbers in spring than in autumn and summer. Chlamydonomonas, Oo- cytis, and Scenedesmus species were the main algae. Cyanophyta members (Gloeocapsa, Chroococcus, Oscillatoria) …
Diatoms (Bacillariophyta) In The Phytoplankton Of Keban Reservoir And Their Seasonal Variations, A. Kadri Çeti̇n, Bülent Şen
Diatoms (Bacillariophyta) In The Phytoplankton Of Keban Reservoir And Their Seasonal Variations, A. Kadri Çeti̇n, Bülent Şen
Turkish Journal of Botany
The seasonal variations of planktonic diatoms occurring in the Keban and Içme regions of Keban Reservoir were in-vestigated over a 2-year period (January 1991 - December 1992). A total of 104 diatom taxa were determined. Cyclotella ocellata Pantocksek, C. kützingiana Thwaites (Centrales), Asterionella formosa Hassall and Fragilaria crotonensis Kitton (Pennales) were the most conspicuous diatoms in terms of frequency of occurrence and numbers of individuals in the phytoplankton. The species composition and seasonal growth properties of the diatoms differed in the Keban and Içme regions of the lake. Although the quan-tity of diatoms tended to increase in all seasons, spring …