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Articles 1681 - 1710 of 1739
Full-Text Articles in Life Sciences
The Woody Vegetation Of The Kelkit Valley, Fergan Karaer, Mahmut Kilinç, H. Güray Kutbay
The Woody Vegetation Of The Kelkit Valley, Fergan Karaer, Mahmut Kilinç, H. Güray Kutbay
Turkish Journal of Botany
In this work, the forest, macchie and hygrophilous vegetation of Kelkit Valley was studied. Interesingly the study area is a transitional zone along the boundries of Central Anatolia and the Central and East Black Sea regions. From the phytogeographical point of view this area is situated between the Euro-Siberian and Irano-Turanian floristic regions. This study was carried out according to the Braun-Blanquet method. Twelve plant associations and 2 subassociations were identified belonging to four different vegetation types. Ten of the associations and two subasociations here are determined as new associations. Vegetation tables are given.
An Investigation On Rooting Of Juglans Regia L. Hardwood Cuttings, Tohi̇t Güneş
An Investigation On Rooting Of Juglans Regia L. Hardwood Cuttings, Tohi̇t Güneş
Turkish Journal of Botany
The rootinf of Juglans regia L. ( Juglandeceae) hardwood cuttings was investigated. The cuttings were treated with a solution of 100 and 1000 ppm IBA concentrations. One and two year old shoot cuttings were used and carbohydrate changes were recorded during rooting. No rooting was observed in any cutting, 32% callus formation was observed on the basal parts of the cuttings. The flower buds burst earlier than the vegetative buds and developed male or female flowers. Callus formation rate or bud burst was not significantly affected by the treatment of IBA. Carbohydrate changes occurred during the culture, but there was …
New Floristic Records For The Grid Squares C7 And C8 In Turkey From The Fabaceae, A. Selçuk Erteki̇n
New Floristic Records For The Grid Squares C7 And C8 In Turkey From The Fabaceae, A. Selçuk Erteki̇n
Turkish Journal of Botany
No abstract provided.
New Floristic Records For Grid Square C6, Murat Eki̇ci̇, Tuna Eki̇m
New Floristic Records For Grid Square C6, Murat Eki̇ci̇, Tuna Eki̇m
Turkish Journal of Botany
No abstract provided.
Nonvolatile Acid Composition During Fruit Development Ofdiospyros Lotus L., F. Ahmet Ayaz, Asım Kadioğlu
Nonvolatile Acid Composition During Fruit Development Ofdiospyros Lotus L., F. Ahmet Ayaz, Asım Kadioğlu
Turkish Journal of Botany
Changes in nonvolatile acid contents during fruit development of Diospyros lotus L ( Ebenaceae) were studied. Suc-cinic, furmaric, malic, citric and azelaic acids were identified and quantified by gas chromatography. The quantities of all acids varied significantly during the fruit development. Malic and citric acids were generally predominant in all development stages. During havesting time (on day 331), fumaric acid was the most abundant acid in the fruits. Quantities of malic, succinic, fu-maric and citric acids (except azelaic acid) were found to be the highest in September (on day 271).
New Floristic Records For The Grid Square C_3(Akseki-Antalya-Turkey), Ahmet Duran, Hayri Duman
New Floristic Records For The Grid Square C_3(Akseki-Antalya-Turkey), Ahmet Duran, Hayri Duman
Turkish Journal of Botany
No abstract provided.
Comparative Effects Of Kinetin, Benzyladenine, And Gibberellic Acid On Abscisic Acid Inhibited Seed Germination And Seedling Growth Of Red Pine And Arbor Vitae, Kudret Kabar
Turkish Journal of Botany
The effects of kinetin, benzyladenine (BA), and gibberellic acid (GA 3 ) on abscisic acid (ABA) inhibition of seed germination and seedling growth of red pine (Pinus brutia Ten.) and arbor vitae (Thuja orientalis L.) were studied. For this purpose, the seeds of these two species were germinated in Petri dishes containing ABA and the mixtures of its with kinetin, BA, and GA 3 alone or in combination at 20ºC for 12 or 15 days for arbor vitae and red pine, respectively. The inhibitory effect of ABA on percentages of the seed germination and hypocotyl emergence, the time course of …
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 …
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 …
Ten New Records Of Macrofungi For Turkey, Ertuğrul Sesli̇
Ten New Records Of Macrofungi For Turkey, Ertuğrul Sesli̇
Turkish Journal of Botany
Spathularia flavida Pers.: Fr., Tremella foliacea (Pers.: S.F. Gray) Pers., Sebacina incrustans (Fr.) Tul., Albatrellus cristatus (Pers.: Fr.) Kotl. & Pouz., Hygrocybe sciophana (Fr.) Karst., Hygrophorus ligatus Fr., Hgrophorus unicolor Gröger, Hy-pholoma epixanthum (Fr.) Quél , Inocybe olida R. Mre. and Lactarius flavidus Boud. were collected from the Trabzon region and identified as new records for the macrofungal flora of Turkey.
Two New Species And A New Hybrid From Anatolia, Hayri Duman, K. Hüsnü Can Başer, Zeki Aytaç
Two New Species And A New Hybrid From Anatolia, Hayri Duman, K. Hüsnü Can Başer, Zeki Aytaç
Turkish Journal of Botany
Two new species and a new hybrid of Labiatae from south Anatolia are described and illustrated: Sideritis caesarea Duman, Aytaç et Baser, Sideritis vuralii Duman et Baser, Origanum x adanense Baser et Duman.
Nitrogen Mineralization In The Soils Of Some Grassland Communities In The Alpine Region Of Uludag In Bursa-Turkey, Gürcan Güleryüz
Nitrogen Mineralization In The Soils Of Some Grassland Communities In The Alpine Region Of Uludag In Bursa-Turkey, Gürcan Güleryüz
Turkish Journal of Botany
Nitrogen mineralization was investigated in controlled conditions (60% WHC, 20ºC) in the soil of some alpine grassland communities. A significant correlation was found between the mineralization of nitrogen and certain soil factors (pH, WHC, Total Nitrogen and Organic Carbon). It was concluded that ammonification takes place at higher rates in grasslands which are dominated by Nardus stricta L. (Poaceae) plant species, whereas nitrification occurs at a higher rates in grasslands which are dominated by Festuca cyllenica Boiss. et Heldr. and F. punctoria Sm. (Poaceae).
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 …
Flora Hellenica Vol.1 (1997), Asuman Baytop
Flora Hellenica Vol.1 (1997), Asuman Baytop
Turkish Journal of Botany
No abstract provided.
Pollen Flora Of Pakistan - X. Leguminosae(Subfamily: Caesalpinioideae), Anjum Perveen, Mohammad Qaiser
Pollen Flora Of Pakistan - X. Leguminosae(Subfamily: Caesalpinioideae), Anjum Perveen, Mohammad Qaiser
Turkish Journal of Botany
The pollen morphology of 11 species representing 5 genera of the subfamily Caesalpinioideae from Pakistan was examined by light and scanning electron microscope. Caesalpinioideae is ± a eurypalynous subfamily. The pollen grains are generallly radially symmetrical, isopolar, tricolporate and triangular-trilobed. The tectum is commonly reticulate-rugulate or fossulate-foveolate, and often striate. The pollen morphology of the subfamily is significantly useful at the generic and specific levels. On the basis of apocolpium, mesocolpium and tectum features, three pollen types were recongnized, namely, B auhinia variegata - type , Caesalpinia pulcherrima - type and Senna holosericea - type.
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 Epipelic And Epilithic Algaeof Sana River (Trabzon/Turkey), Saadet Kolayli, Arif Baysal, Bülent Şahi̇n
A Study On The Epipelic And Epilithic Algaeof Sana River (Trabzon/Turkey), Saadet Kolayli, Arif Baysal, Bülent Şahi̇n
Turkish Journal of Botany
The epipelic and epilithic algae of the Sana river, were investigated during the period January 1995 to December 1995. Sity taxa belonging to the Bacillariphyta, Chlorophyta, Cyanophyta and Euglenopnyta divisions were identified. Melosira varians Ag. (Coscinodiscaceae), Cocconeis placentula var. euglypta (Ehr.) Cleve (Achnanthaceae), Cymbella minuta Hilse ex Rabh. (Cymbellaceae), Navicula cryptocephala Kütz. and N. cryptocephala var. veneta Kütz. Grun. (Naviculaceae), were abundant among epipelic algae. Of the epilithic algae, it was observed that Concconeis placentula var. euglypta, Cymbella mi-nuta and Didymosphenia geminata (Lyng.) M. S. (Naviculaceae) were abundant.
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 …
Phenotypic Plasticity In Turkish Commelina Communis L.(Commelinaceae) Populations, Hamdi Güray Kutbay, Fevzi Uçkan
Phenotypic Plasticity In Turkish Commelina Communis L.(Commelinaceae) Populations, Hamdi Güray Kutbay, Fevzi Uçkan
Turkish Journal of Botany
Phenotypic plasticity was investigated in Commelina communis L. ( Commelinaceae), which is a perennial herb native to temperate Asia (China) and widely naturalised in the central and eastern Black Sea regions were investiguted C. communis has a relatively high ecological tolerance with respect to climatic and soil factors. It was found that the shoot length, leaf width, number of branches, dead leaves and flowers, root:shoot ratio, total -flower- and root biomasses, flower and root ni-trogen and RE 1 and RE 2 varied significantly in among the three populations. In addition, there were statistically important correlations between reproductive effort (RE) values …
Three Alien Species New To The Flora Of Turkey, Andrew J. Byfield, Asuman Baytop
Three Alien Species New To The Flora Of Turkey, Andrew J. Byfield, Asuman Baytop
Turkish Journal of Botany
Sporobolus fertilis (Steud.) W.D. Clayton (Gramineae) , Physalis pubescens L. (Solanaceae) and Ambrosia elatior L. (Compositae ) are added to the flora of Turkey following the collection in August 1995 of three specimens from Northeast Anatolia where well-established populations now exist. They are housed at the Herbarium of the Faculty of Pharmacy of İstanbul University (nos. 69298, 69309, 69357). Observations on the alien plants of the cited area are appended.
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 …
The Effect Of Storage Environment On Seed Survival And The Accumulationof Chromosomal Aberrations In Pea Landraces And Cultivars(Pisum Sativum L.), H. Özkan Si̇vri̇tepe, Anna M. Dourado
The Effect Of Storage Environment On Seed Survival And The Accumulationof Chromosomal Aberrations In Pea Landraces And Cultivars(Pisum Sativum L.), H. Özkan Si̇vri̇tepe, Anna M. Dourado
Turkish Journal of Botany
The relationship between loss of seed viability and the accumulation of chromosomal aberrations was investigated in both landraces and cultivars of the pea ( Pisum sativum L.). It was shown here, for the first time with pea landraces, that loss of seed viability is associated with an increase in the frequency of chromosomal abberrations, and that even small losses of viability result in some chromosomal damage in the seeds of pea landraces as well as in the seeds of pea cultivars. In addition, for a given loss of viability the frequency of chromosomal aberrations in either low or high moisture …
Plant Regeneration From Unfertilized Ovaries Of Sugar Beet ( Beta Vulgaris L.)Cultured In Vitro, Ekrem Gürel, Songül Gürel
Plant Regeneration From Unfertilized Ovaries Of Sugar Beet ( Beta Vulgaris L.)Cultured In Vitro, Ekrem Gürel, Songül Gürel
Turkish Journal of Botany
A. method is described for plant regeneration from unfertilized ovaries isolated from a diploid male sterile sugar beet ( Beta vulgaris L.) breeding line that was developed at the Sugar Institute, Ankara, Turkey. Ovary explants were cultured on Murashige & Skoog (MS) medium containing 2.0 mg/l benzylaminopurine (BAP). Two treatments were tested by incubating all of the explants in darkness for 15 days, and then transferring one half to light and keeping the other half in darkness throughout the culture. Callus formation occurred in both treatments more or less at similar rates: however, there was a significant difference between the …
The Algae Flora Of Aksu Stream (Isparta -Turkey), Ö. Osman Ertan, Arzu Morkoyunlu
The Algae Flora Of Aksu Stream (Isparta -Turkey), Ö. Osman Ertan, Arzu Morkoyunlu
Turkish Journal of Botany
The algal flora at 4 stations chosen on Aksu Stream were investigated between September 1993 and August 1994. The flora consisted of 73 taxa belonging to the Bacillariophyta, Chlorophyta, Cyanophyta and Euglenophyta divisions. The species of Navicula Broy., Nitzschia Hassall, SurirellaTurpin, Amphora Ehr., Cymbella Agardh, Concconeis Ehr., Fragilaria Lyngbye and Synedra ulana (Nitz.) Ehr. were found to be widespread. Apart from members of Bacillariophyta, Oscillatoria limosa (Roth.). C.A.A.gardh., Oscillatoria formosa Broy. and Merismopedia punctata Meyen ( Cyanophyta) were observed to be abundant and frequent, in the year when the research was carried out. The members of other divisions were determined …
Lichen Flora Of Amanos Mountain And The Province Of Hatay, Volker John, Pier Luigi Nimis
Lichen Flora Of Amanos Mountain And The Province Of Hatay, Volker John, Pier Luigi Nimis
Turkish Journal of Botany
Two hundred forty-three lichen taxa are reported from the province of Hatay. Of these, 223 species are reported for the first time for the province of Hatay, 74 species are new records for the mediterranean region of Turkey, and 35 species are new records for Turkey. New range diagnoses are provided for these species.