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Articles 1501 - 1530 of 1739
Full-Text Articles in Life Sciences
Pollen Studies On Some Species Of The Genus Convolvulus L. (Convolvulaceae) From Morocco, Yusuf Menemen, Stephen L. Jury
Pollen Studies On Some Species Of The Genus Convolvulus L. (Convolvulaceae) From Morocco, Yusuf Menemen, Stephen L. Jury
Turkish Journal of Botany
The pollen grains of nine species of Convolvulus L. from Morocco were studied using scanning electron microscopy and light microscopy. The species belong to three sections and four subsections: sections Convolvulus, Acanthocladi Boiss. and Inermes Boiss. and subsections Convolvulus, Spinescentes Boiss., Oleifolii Peter, and Diffusi Boiss. The pollen grains in the genus examined are all 3-zonocolpate. The pollen is suboblate, oblate-spheroidal, prolate-spheroidal and prolate. The nexine is thinner than the sexine and the tectum is distinctly perforated in all species. The pollen grains show variation within the genus in polar and equatorial axes, colpus length and shape. These variations sometimes …
A Study On The Soil-Plant Interactions Of Some Cistus L. Species Distributed In West Anatolia, Süleyman Başlar, Yunus Doğan, Hasan Hüseyi̇n Mert
A Study On The Soil-Plant Interactions Of Some Cistus L. Species Distributed In West Anatolia, Süleyman Başlar, Yunus Doğan, Hasan Hüseyi̇n Mert
Turkish Journal of Botany
This study was undertaken with the aim of examining the soil-plant interactions of Cistus creticus L. and Cistus salviifolius L. in West Anatolia. The soil analysis data showed that these plants grow in different kinds of soils with sandy-clayey-loam, clayey-loam and loamy texture. The soils in general are not saline but are moderately and slightly alkaline, being rich in nitrogen and having a low level of phosphorus and potassium. They are unaffected by the calcium carbonate content in soils. A negative relation was observed in C. creticus after regression analysis between plant calcium and soil phosphorus, plant calcium and soil …
Macrofungi Of Değirmenboğazı (Balıkesir), Fadi̇me Yilmaz, Mustafa Işiloğlu
Macrofungi Of Değirmenboğazı (Balıkesir), Fadi̇me Yilmaz, Mustafa Işiloğlu
Turkish Journal of Botany
The macrofungi collected during field trips from the Değirmenboğazı picnic area between 1998 and 2001 were investigated taxonomically. As a result of these field and laboratory studies, 54 taxa belonging to 19 families were identified. These species are presented as a list. Eleven of these taxa are new records to the Turkish Macromycota.
In Vitro Induction Of Crown Galls By Agrobacterium Tumefaciens Super Virulent Strain A281 (Ptibo 542) In Lentil (Lens Culinaris Medik.), Khalid Mahmood Khawar, Sebahatti̇n Özcan
In Vitro Induction Of Crown Galls By Agrobacterium Tumefaciens Super Virulent Strain A281 (Ptibo 542) In Lentil (Lens Culinaris Medik.), Khalid Mahmood Khawar, Sebahatti̇n Özcan
Turkish Journal of Botany
Twenty-one genotypes of lentils (Lens culinaris Medik.), obtained from different sources in Turkey and Pakistan, were included in the study. Seeds were germinated in MS medium for 6-10 days with a 16 h photoperiod at 24°C, from which leaf and stem explants were isolated for inoculation with super virulent strain A281 (pTiBo 542) :: pBI121.1 agropine/mannopine type of Agrobacterium tumefaciens. The binary plasmid pBI121.1 carried a GUS gene directed by CaMV 35S promoter in order to confirm transformation by GUS expression. Parameters recorded include percentage of tumour formation, tumour diameter, and tumour weight. Pul 11, Kışlık Yeşil 21, Akm 565 …
A New Record For The Algal Flora Of Turkey: Chaetomorpha Crassa (C.Ag.) Kütz. (Cladophoraceae, Chlorophyceae), Meral Apaydin Yağci, İsmai̇l İbrahi̇m Turna
A New Record For The Algal Flora Of Turkey: Chaetomorpha Crassa (C.Ag.) Kütz. (Cladophoraceae, Chlorophyceae), Meral Apaydin Yağci, İsmai̇l İbrahi̇m Turna
Turkish Journal of Botany
Chaetomorpha crassa (C.Ag.) Kütz. was sampled from the brackish water of Beymelek Lagoon (Antalya). During the seasons in which the water temperature is between 18.9°C (autumn) and 23.4°C (summer), the development density of this species in this area is considerably higher than at other times.
Floristic Records Of Lichens In Adana, Konya And Niğde Provinces, Şaban Güvenç
Floristic Records Of Lichens In Adana, Konya And Niğde Provinces, Şaban Güvenç
Turkish Journal of Botany
In this study, 50 taxa belonging to 25 genera were determined from the provinces of Adana, Konya and Niğde. Pertusaria velata (Turner) Nyl. is a new record for Turkey.
Additional Lichen Records From Rize Province, Kenan Yazici, Ali̇ Aslan
Additional Lichen Records From Rize Province, Kenan Yazici, Ali̇ Aslan
Turkish Journal of Botany
One hundred and fourteen species and 2 varieties, which belong to the 29 families in Ascomycotina, are reported from Çamlıhemşin county, Rize province. Seventy-eight species and 1 variety are new records for Rize.
Age Mediated Effects On The Alternative Respiratory Pathway In Leaves Of Rhodiola Rosea And Ajuga Reptans, Natalia V. Pystina, Roman A. Danilov
Age Mediated Effects On The Alternative Respiratory Pathway In Leaves Of Rhodiola Rosea And Ajuga Reptans, Natalia V. Pystina, Roman A. Danilov
Turkish Journal of Botany
The influence of aging processes on respiration and the ratio of respiratory pathways in the leaves of Rhodiola rosea L. and Ajuga reptans L. under natural conditions was investigated. Young leaves had a higher respiration rate and higher activity of the alternative respiratory pathway than did mature leaves. The capacity of the alternative respiratory pathway did not show significant differences between the young and mature leaves of R. rosea and increased in the mature leaves of A. reptans (from 60% up to 88%). This fact may be explained by the higher requirements of growing tissues for metabolites. In this case, …
P-Protein Structure In Functional And Non-Functional Secondary Phloem In Armeniaca Vulgaris Lam. (Rosaceae), Gönül Algan, H. Nurhan Bakar Büyükkartal
P-Protein Structure In Functional And Non-Functional Secondary Phloem In Armeniaca Vulgaris Lam. (Rosaceae), Gönül Algan, H. Nurhan Bakar Büyükkartal
Turkish Journal of Botany
P-proteins (phloem proteins) and their conformational changes in the functional and non-functional sieve elements in secondary phloem of Armeniaca vulgaris Lam. (Rosaceae) were examined with an electron microscope. Scattered throughout the cell, the fibrillar components of p-protein in active sieve elements were much denser sieve plate surfaces. P-proteins in inactive sieve elements, different from those of active ones, were observed to appear as disordered, short, thread-like fibrils with fern-like crystalline structure.
A Study On The Epiphytic Algae Of The Nilüfer Stream (Bursa), Şükran Dere, Di̇dem Karacaoğlu, Nurhayat Dalkiran
A Study On The Epiphytic Algae Of The Nilüfer Stream (Bursa), Şükran Dere, Di̇dem Karacaoğlu, Nurhayat Dalkiran
Turkish Journal of Botany
In our study, water samples were taken monthly between August 1997 and June 1998 from six selected stations in the region, from the source of the Nilüfer stream to the point where it joins the Marmara Sea. Temperature (Cº), pH, total dissolved substance (TDS), conductivity (EC), dissolved oxygen (DO) and biochemical oxygen demand (BOD5) values of the samples were measured. The epiphytic algal flora, and the population density and the abundance degree of species were determined. In the community of epiphytic algae, members of Bacillariophyta were dominant and Encyonema minutum (Hilse ex Rabh.) D.G.Mann, (Cymbellaceae), Achnanthidium minutissimum (Kütz.) Czarn. (Achnanthaceae), …
Discomycetous Fungi Of The Leotiales Found On The Betulaceae In Bulgaria, Evtimia Dimitrova
Discomycetous Fungi Of The Leotiales Found On The Betulaceae In Bulgaria, Evtimia Dimitrova
Turkish Journal of Botany
A checklist is given of 34 discomycetous fungi of the Leotiales growing on substrates of the Betulaceae in Bulgaria. The fungi were distributed between the host-genera as follows: 14 species on Alnus Mill., 10 on Betula L., 11 on Carpinus L. and 15 on Corylus L.
The Flora Of Upper Ceyhan Valley (Kahramanmaraş/Turkey), Adem Tatli, Hasan Akan, A. Zafer Tel, Cemi̇l Kara
The Flora Of Upper Ceyhan Valley (Kahramanmaraş/Turkey), Adem Tatli, Hasan Akan, A. Zafer Tel, Cemi̇l Kara
Turkish Journal of Botany
This investigation was carried out between 1994 and 1995 in order to determine the flora of Upper Ceyhan Valley. The research area is situated in the province of Kahramanmaraş and within C6 of the grid system. In the area, 412 taxa belonging to 68 families and 262 genera were determined. Twenty-eight (6.7%) taxa are endemics for Turkey. In the distribution of the taxa according to the floristic regions, Mediterranean elements with a rate of 23.5% are the most common. Irano-Turanian elements with a rate of 17.2% and Euro-Siberian elements with a rate of 3.4% were found. The families which have …
New Records For The Myxomycetes Flora Of Turkey, C. Cem Ergül, Başaran Dülger
New Records For The Myxomycetes Flora Of Turkey, C. Cem Ergül, Başaran Dülger
Turkish Journal of Botany
Thirty myxomycetes species are new records for Turkey. Among these species, Craterium minutum (Leers) Fries, Dianema repens G.Lister & Cran., Lindbladia tubulina Fries and Tubifera ferrruginosa (Batsch) J.F.Gmel. are also new genus record taxa for the myxomycetes flora of Turkey.
Perilla: A New Genus For Turkey, Ali̇ Arslan Dönmez
Perilla: A New Genus For Turkey, Ali̇ Arslan Dönmez
Turkish Journal of Botany
Perilla frutescens (L.) Britton (Labiatae), recently collected in Artvin, is a new record for the flora of Turkey. An illustration and description are given.
Growth, Proline Accumulation And Ionic Relations Of Tomato (Lycopersicon Esculentum L.) As Influenced By Nacl And Na_2so_4 Salinity, Ali̇ İnal
Turkish Journal of Botany
Salinity depresses ion activities, decreases the ratios of plant nutrients to Na and Cl ions, and consecutively suppresses plant growth. The objective of the present study was to distinguish the effects of NaCl and Na_2SO_4 salinity on the growth, ionic relations and proline accumulation of tomato plants. Tomato plants were grown for two months. Plant growth was reduced, but proline accumulation was enhanced by salinity. Total N and NO_3-N content of plants were decreased by both NaCl and Na_2SO_4 salinity. Sulphur content was not affected by the salt treatments. Salinity caused nutrient imbalances. The Na and Cl contents of plants …
Macrofungi Of Ağrı Province, Kenan Demi̇rel, Yusuf Uzun, Abdullah Kaya
Macrofungi Of Ağrı Province, Kenan Demi̇rel, Yusuf Uzun, Abdullah Kaya
Turkish Journal of Botany
Macrofungi were collected during field trips in the Ağrı district between 1997 and 2000. At the end of field and laboratory studies, 45 taxa belonging to 3 classes and 18 families were identified. Three of these, Pluteus ephebeus (Fr.:Fr.) Gill. (Pluteaceae), Coprinus auricomus Pat. (Coprinaceae) and Inocybe tigrina Heim. (Cortinariaceae), are new records for the mycoflora of Turkey.
Liverworts (Marchantiopsida) Of The Dilek Peninsula National Park, Hati̇ce Özenoğlu Ki̇remi̇t, İsa Gökler
Liverworts (Marchantiopsida) Of The Dilek Peninsula National Park, Hati̇ce Özenoğlu Ki̇remi̇t, İsa Gökler
Turkish Journal of Botany
In this study, the distribution of liverworts in the Dilek Peninsula National Park was investigated. The study area is near Kuşadası in Aydın and within the C11 square of Turkey. Twenty-six species were determined from this plant group belonging to the class Marchantiopsida (Hepaticae) of the division Bryophyta. These species are collected into 18 families. Of these, Pellia neesiana (Gott.) Limpr., Gymnocolea acutiloba (Schiffn.) K.Müll., Jungermannia hyalina Lyell, Calypogeia sphagnicola (H.Arn. & J.Perss.) Warnst. & Loeske, Radula lindenbergiana Gott & Hartm. and Lejeunea lamacerina (Steph.) Schiffn. are reported for the first time from the C11 square of Turkey.
Flora Of Kazankaya Canyon (Yozgat-Çorum), Ahmet Duran, Ergi̇n Hamzaoğlu
Flora Of Kazankaya Canyon (Yozgat-Çorum), Ahmet Duran, Ergi̇n Hamzaoğlu
Turkish Journal of Botany
A floristic study of Kazankaya Canyon was carried out. Sixty families, 216 genera and 308 taxa were identified. A species new to science was found from the genus Scorzonera L. (Compositae). Fifty-two taxa (16.9%) are Irano-Turanian, 41 (13.3%) Mediterranean and 11 (3.6%) Euro-Siberian phytogeographic region elements. The remaining 195 (63.3%) taxa are multi-regional and 9 (2.9%) are not from a determined phytogeographic region. The life forms were determined according to Raunkiaer. The number of endemic taxa is 24 (7.8%). Four taxa show variations not previously reported in the literature. Thirty-four taxa are new floristic records for the square A5.
The Flora And Vegetation Of Kunduz Forests (Vezirköprü / Samsun), Fazil Özen, Mahmut Kilinç
The Flora And Vegetation Of Kunduz Forests (Vezirköprü / Samsun), Fazil Özen, Mahmut Kilinç
Turkish Journal of Botany
The research area, Kunduz Forests, is located on Kunduz Mountain, which is about 35 km south-west of Vezirköprü (Samsun). This area is in the A5 square in the grid scheme of Davis and is in the Euxine sector of the Euro-Siberian floristic region phytogeographically. The distribution of 306 specific and infraspecific taxa forming the flora of the research area according to floristic regions is as follows: Euro-Siberian 28.43%, Mediterranean 11.44% and Irano-Turanian 4.90%. The percentage of taxa found in more than one floristic region is 55.23%. Twenty-five of the 306 taxa found in the study area are given as new …
A New And Interesting Ascomycete Genus (Pithya Fuckel) Record For The Fungi Flora Of Turkey, Hasan Hüseyi̇n Doğan, Mustafa Işiloğlu
A New And Interesting Ascomycete Genus (Pithya Fuckel) Record For The Fungi Flora Of Turkey, Hasan Hüseyi̇n Doğan, Mustafa Işiloğlu
Turkish Journal of Botany
An ascomycetous genus Pithya Fuckel (Sarcosyphaceae) was recorded for the first time from Turkey.
Flora Of Karagüney Mountain (Kırıkkale), Ali̇ Arslan Dönmez
Flora Of Karagüney Mountain (Kırıkkale), Ali̇ Arslan Dönmez
Turkish Journal of Botany
This paper deals with a floristic study of Karagüney Mountain (Kırıkkale/Turkey). The study was carried out during 1989-1991 and 2500 vascular plant samples were collected. Eight hundred and sixty-eight taxa of 378 genera have been identified. Fabaceae, Asteraceae and Poaceae are the largest families and Astragalus L., Silene L. and Salvia L. are the largest genera in the area. The endemism rate of the area is 13.1%. The classification of the taxa into three main chorological units shows that Irano-Turanian elements are predominant. Threatened categories were proposed for 109 taxa according to IUCN categories.
The Effects Of Gamma Irradiation On The Pollen Size Of Gossypium Hirsutum L., Çi̇ğdem Savaşkan
The Effects Of Gamma Irradiation On The Pollen Size Of Gossypium Hirsutum L., Çi̇ğdem Savaşkan
Turkish Journal of Botany
Gossypium hirsutum L. (cotton) is cultivated widely in the south of Turkey. In this study, seeds of the cotton cultivar Çukurova 1518 were irradiated with gamma at 50, 100, 200, 300 and 400 Gray doses in a Co^{60} source. The size of morphologically normal pollen grains was measured in generation M_1 and found to be 120.35 µm in the control group, while this value was different in the irradiated groups. However, there was no significant difference in the size of pollen grains of normal morphology and shape between the irradiated and control pollens.
New Records Of The Genus Histioneis F.R. Von Stein (Dinophyceae) From Turkish Coastal Waters, Sevi̇m Polat, Tufan Koray
New Records Of The Genus Histioneis F.R. Von Stein (Dinophyceae) From Turkish Coastal Waters, Sevi̇m Polat, Tufan Koray
Turkish Journal of Botany
The dinoflagellate genus Histioneis F.R. von Stein 1883 and six species belonging to this genus are reported for the first time from the coastal waters of Turkey (north-eastern Mediterranean, lat. 36° 06' N - 36° 07' N, long. 33° 28' E - 33°30' E). Descriptions of the species Histioneis depressa J.Schiller, H. expansa L.Rampi, H. para Murray & Whitting, H. marchesonii L.Rampi, H. striata Kof. & J.R.Michener and H. elongata Kof. & J.R.Michener are given.
Nineteen New Records From Sarıyar Dam Reservoir Phytoplankton For Turkish Freshwater Algae, Tahi̇r Atici
Nineteen New Records From Sarıyar Dam Reservoir Phytoplankton For Turkish Freshwater Algae, Tahi̇r Atici
Turkish Journal of Botany
Nineteen new records of Turkish freshwater algae were determined in a study of the phytoplankton from Sarıyar dam reservoir. One of these species was from the Cyanobacteria, 14 were from the Chlorophyta, three were from the Euglenophyta and one was from the Heterokontophyta.
Auxin (Indole-3-Acetic Acid), Gibberellic Acid (Ga_3), Abscisic Acid (Aba) And Cytokinin (Zeatin) Production By Some Species Of Mosses And Lichens, Nuray Ergün, Şaban Fati̇h Topcuoğlu, Ati̇lla Yildiz
Auxin (Indole-3-Acetic Acid), Gibberellic Acid (Ga_3), Abscisic Acid (Aba) And Cytokinin (Zeatin) Production By Some Species Of Mosses And Lichens, Nuray Ergün, Şaban Fati̇h Topcuoğlu, Ati̇lla Yildiz
Turkish Journal of Botany
In this study, the levels of endogenous free, bound and total auxin (Indole-3-acetic acid, IAA), gibberellic acid (GA_3), abscisic acid (ABA) and cytokinin (zeatin) were examined in some species of mosses and lichens. For determination of the levels of these plant growth regulators, spectrophotometry was used. Our findings show that the mosses and lichens used in this study produce the plant growth regulators IAA, GA_3, ABA and zeatin.
Seasonal Variations In The Biomass Of Macro-Algal Communities From The Gulf Of Antalya (North-Eastern Mediterranean), İsmai̇l İbrahi̇m Turna, Ö. Osman Ertan, Mario Cormaci, Giovanni Furnari
Seasonal Variations In The Biomass Of Macro-Algal Communities From The Gulf Of Antalya (North-Eastern Mediterranean), İsmai̇l İbrahi̇m Turna, Ö. Osman Ertan, Mario Cormaci, Giovanni Furnari
Turkish Journal of Botany
In this study, the seasonal variations in the macro-algal biomass in the Gulf of Antalya (north-eastern Mediterranean) were investigated. The seasonal variations of the macro-algal biomass were found to be related to the biology of the abundant species during less favourable seasons. These variations occurred usually as a result of a significant reduction in algal density [Padina pavonica (L.) J.V.Lamour., Dasycladus vermicularis (Scopoli) Krasser, Chondrophycus papillosus (C.Agardh) Garbay & Harper] or loss of major part of their thallus [Cystoseira spp., Liagora distenta (Mertens ex Roth) J.V.Lamour., Liagora viscida (Forssk.) C.Agardh]. The highest values of biomass were found to be in …
\Alpha -Difluoromethylornithine Inhibits The Growth Of Fungus Macrophomina Phaseoli, Narçin Palavan Ünsal, Ayşin Çotuk, Yeşi̇m Kalaç Martini
\Alpha -Difluoromethylornithine Inhibits The Growth Of Fungus Macrophomina Phaseoli, Narçin Palavan Ünsal, Ayşin Çotuk, Yeşi̇m Kalaç Martini
Turkish Journal of Botany
\alpha -Difluoromethylornithine (DFMO), a specific enzyme activated inhibitor of ornithine decarboxylase (ODC), significantly inhibited the mycelial growth of the fungus Macrophomina phaseoli (Tassi) Goidanich. Putrescine (Put), when added to the nutrient medium at a concentration of 0.25 mM, decreased the inhibitory effect of DFMO. These results suggest that polyamines (PAs) are essential for the growth of fungi and that DFMO is applicable to the alleviation or prevention of crop losses due to phytopathogenic fungi.
Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan
Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan
Turkish Journal of Botany
No abstract provided.
Phytoplankton Distribution, Diversity And Nutrients At The North-Eastern Mediterranean Coast Of Turkey (Karataş-Adana), Sevi̇m Polat, Oya Işik
Phytoplankton Distribution, Diversity And Nutrients At The North-Eastern Mediterranean Coast Of Turkey (Karataş-Adana), Sevi̇m Polat, Oya Işik
Turkish Journal of Botany
Seasonal changes in phytoplankton composition and phytoplankton abundance and physico-chemical factors affecting these parameters were investigated in this study. Quantitative and qualitative phytoplankton and nutrient analysis were carried out between 1998 and 1999 at 12 sampling stations located from inshore to offshore of Karataş, situated in the north-eastern Mediterranean. A total of 135 taxa were determined, belonging to four algae classes: Cyanophyceae, Bacillariophyceae, Dinophyceae and Dictyochophyceae. Bacillariophyceae appeared to be the dominant group in terms of total species number and cell numbers during the research period. The number of phytoplankton species was high in winter and quite low in summer. …
Selected Chemical Constituents And Their Seasonal Variations In Flabellia Petiolata (Turra) Nizam. And Halimeda Tuna (Ellis & Sol.) J.V.Lamour. In The Gulf Of Antalya (North-Eastern Mediterranean), Şengül Bi̇lgi̇n, Ö. Osman Ertan
Selected Chemical Constituents And Their Seasonal Variations In Flabellia Petiolata (Turra) Nizam. And Halimeda Tuna (Ellis & Sol.) J.V.Lamour. In The Gulf Of Antalya (North-Eastern Mediterranean), Şengül Bi̇lgi̇n, Ö. Osman Ertan
Turkish Journal of Botany
Seasonal changes in selected chemical, ecological and morphological characteristics of Flabellia petiolata (Turra) Nizam. and Halimeda tuna (Ellis & Sol.) J.V.Lamour., which are commonly found in the Gulf of Antalya, were studied. Crude protein content of F. petiolata was found to be higher than that of H. tuna, whereas the crude fat contents of the two species were similar. On the other hand, compared to F. petiolata, H. tuna was rich in inorganic material. Both species were observed to be dense on a seasonal basis in the sampling area and they reached their maximum length during summer.