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Articles 5701 - 5730 of 10755

Full-Text Articles in Botany

Nineteen New Records From Sarıyar Dam Reservoir Phytoplankton For Turkish Freshwater Algae, Tahi̇r Atici Jan 2002

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.

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Isoetes Toximontana (Isoetaceae), A New Quillwort With Green Megaspores From The Northern Cape Of South Africa, Lytton John Musselman, J. P. Roux Jan 2002

Isoetes Toximontana (Isoetaceae), A New Quillwort With Green Megaspores From The Northern Cape Of South Africa, Lytton John Musselman, J. P. Roux

Biological Sciences Faculty Publications

Isoetes toximontana is only the second quillwort reported from the Northern Cape region in South Africa. It occurs in shallow water on the Gifberg. Megaspores are uniformly tuberculate on the proximal surface; their distal surfaces may have occasional rugi along with bullae. They are olive green when dry. Microspores are brown and aculeate. Preliminary field studies suggest that an unexpected diversity of quillworts is found in this region.

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The Use Of Aflp To Detect Genetic Differentiation Within And Among Populations Of Two Prairie Plant Species: Panicum Virgatum And Coreopsis Palmata, Christopher Andrew Hilker Jan 2002

The Use Of Aflp To Detect Genetic Differentiation Within And Among Populations Of Two Prairie Plant Species: Panicum Virgatum And Coreopsis Palmata, Christopher Andrew Hilker

Dissertations and Theses @ UNI

The degree of genetic diversity within any species is crucial to its survival with respect to environmental stresses and its ability to adapt. As native Iowa prairie plant populations continues to diminish, genetic diversity within the state becomes crucially important for restoration, reconstruction, and conservation efforts. This study seeks to determine the degree of genetic variation within native Iowa populations of Panicum virgatum (switchgrass) and Coreopsis palmata (prairie coreopsis, tickseed, prairie tickseed). Plants were obtained directly from the tallgrass prairie, from native seed plantings, and from greenhouse grown cultivated varieties (switchgrass). Amplified Fragment Length Polymorphisms (AFLP) provided genetic fingerprints of …

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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 Jan 2002

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.

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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 Jan 2002

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 …

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A Contribution To The Bryophyte Flora Of Western Turkey: The Bryophyte Flora Of Madran Mountain And The Çine Valley (Aydın, Turkey), Adnan Erdağ Jan 2002

A Contribution To The Bryophyte Flora Of Western Turkey: The Bryophyte Flora Of Madran Mountain And The Çine Valley (Aydın, Turkey), Adnan Erdağ

Turkish Journal of Botany

This study presents a survey on the bryophyte flora of Madran mountain and Çine valley (Aydın, Turkey). One hundred and thirty-three bryophyte species belonging to 35 families and 69 genera were recorded from the area. Phaeoceros laevis (L.) Prosk. is the only member of the hornworts while liverworts are represented by 15 species. The remaining 117 taxa belong to the Bryopsida. Thirty-five species are new records for square C11 according to Henderson's (1961) grid system.

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\Alpha -Difluoromethylornithine Inhibits The Growth Of Fungus Macrophomina Phaseoli, Narçin Palavan Ünsal, Ayşin Çotuk, Yeşi̇m Kalaç Martini Jan 2002

\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.

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Two New Alchemilla L. (Rosaceae) Records For The Flora Of Turkey, Sema Hayirlioğlu Ayaz, Osman Beyazoğlu Jan 2002

Two New Alchemilla L. (Rosaceae) Records For The Flora Of Turkey, Sema Hayirlioğlu Ayaz, Osman Beyazoğlu

Turkish Journal of Botany

Two Alchemilla L. (Rosaceae) species from north-east Anatolia are described as new records for Turkey.

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Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan Jan 2002

Plant Biotechnology I, Tissue Culture And Its Applications, Kemal Kazan

Turkish Journal of Botany

No abstract provided.

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Phytoplankton Distribution, Diversity And Nutrients At The North-Eastern Mediterranean Coast Of Turkey (Karataş-Adana), Sevi̇m Polat, Oya Işik Jan 2002

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. …

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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 Jan 2002

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.

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The Moss Flora Of Ankara - Kızılcahamam - Çamkoru And Çamlıdere Districts, Barboros Çeti̇n, Egemen Unç, Güray Uyar Jan 2002

The Moss Flora Of Ankara - Kızılcahamam - Çamkoru And Çamlıdere Districts, Barboros Çeti̇n, Egemen Unç, Güray Uyar

Turkish Journal of Botany

In this study carried out in Ankara-Kızılcahamam Çamlıdere and Çamkoru districts, 82 taxa were identified by the authors. These belong to 20 families and 42 genera of bryophytes. of these, 10 taxa are new for the A2 grid-square adopted by Henderson.

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The Classification Of The Salvia L. (Labiatae) Species Distributed In West Anatolia According To Phenolic Compounds, Mahmure Naki̇poğlu Jan 2002

The Classification Of The Salvia L. (Labiatae) Species Distributed In West Anatolia According To Phenolic Compounds, Mahmure Naki̇poğlu

Turkish Journal of Botany

The seven species of Salvia L. growing naturally in West Anatolia (Salvia tomentosa Mill., Salvia fruticosa Mill., Salvia smyrnaea Boiss., Salvia argentea L., Salvia horminum L., Salvia verbenaca L., and Salvia virgata Jacq.) and a cultivated form (Salvia officinalis L.) were selected as the study materials. The phenolic compounds extracted from the leaves of the species were separated by two- dimensional thin-layer chromatography. On the basis of the distribution of phenolic spots in the species, the matching coefficients and the coefficient of similarity were calculated in order to determine the relationship between the species. As a result of the group …

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Tibetan Medical Plants, Kemal Hüsnü Can Başer Jan 2002

Tibetan Medical Plants, Kemal Hüsnü Can Başer

Turkish Journal of Botany

No abstract provided.

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Effects Of Systemic Fungicides On Protein, Carbohydrate, Amino Acids And Phenolic Contents Of Susceptible (Mexipak) And Resistant (Povan) Varieties Of Triticum Aestivum L., Zamin Shaheed Siddiqui, Soaliha Ahmed Jan 2002

Effects Of Systemic Fungicides On Protein, Carbohydrate, Amino Acids And Phenolic Contents Of Susceptible (Mexipak) And Resistant (Povan) Varieties Of Triticum Aestivum L., Zamin Shaheed Siddiqui, Soaliha Ahmed

Turkish Journal of Botany

Changes in total protein, carbohydrate, phenolic content and ninhydrine positive amino acids of susceptible (MexiPak) and resistant (Povan) varieties of wheat were studied. Application of systemic fungicides caused a significant (P

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The Effects Of Cold Treatment And Charcoal On The In Vitro Androgenesis Of Pepper (Capsicum Annuum L.), Dudu Özkum Çi̇ner, Ruki̇ye Tipirdamaz Jan 2002

The Effects Of Cold Treatment And Charcoal On The In Vitro Androgenesis Of Pepper (Capsicum Annuum L.), Dudu Özkum Çi̇ner, Ruki̇ye Tipirdamaz

Turkish Journal of Botany

The effects of cold-shock treatment of Capsicum annuum L. buds at 4°C for 48 or 96 h, and the addition of 0.25% activated charcoal on embryo formation were examined. Murashige and Skoog (MS) basal nutrient medium was supplemented with combinations of 4 mg l^{-1} naphthalene acetic acid (NAA) and 1 mg l^{-1} benzyladenine (BA) or 1 mg l^{-1} NAA and 4 mg l^{-1} BA, together with 0.8% (w/v) agar and 3% (w/v) sucrose. The highest number of embryos was obtained from the control anthers which were not subject to cold treatments and were cultured on MS medium containing 4 mg …

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Pollen Studies On Some Species Of The Genus Convolvulus L. (Convolvulaceae) From Morocco, Yusuf Menemen, Stephen L. Jury Jan 2002

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 …

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A Study On The Soil-Plant Interactions Of Some Cistus L. Species Distributed In West Anatolia, Süleyman Başlar, Yunus Doğan, Hasan Hüseyi̇n Mert Jan 2002

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 …

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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 Jan 2002

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 …

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A New Record For The Algal Flora Of Turkey: Chaetomorpha Crassa (C.Ag.) Kütz. (Cladophoraceae, Chlorophyceae), Meral Apaydin Yağci, İsmai̇l İbrahi̇m Turna Jan 2002

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.

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Endemic Plants Of Greece The Peloponnese, K. Hüsnü Can Başer Jan 2002

Endemic Plants Of Greece The Peloponnese, K. Hüsnü Can Başer

Turkish Journal of Botany

No abstract provided.

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Establishment Of Cell Suspension Cultures And Plant Regeneration In Sugar Beet (Beta Vulgaris L.), Songül Gürel, Ekrem Gürel, Zeki̇ Kaya Jan 2002

Establishment Of Cell Suspension Cultures And Plant Regeneration In Sugar Beet (Beta Vulgaris L.), Songül Gürel, Ekrem Gürel, Zeki̇ Kaya

Turkish Journal of Botany

The establishment of cell suspension culture from the callus of sugar beet (Beta vulgaris L.) breeding lines and plant regeneration from suspension-derived callus are described in this study. Using different concentrations and combinations of BAP and 2,4-D, the growth patterns of cell suspension cultures were examined during a range of culture periods (0, 3, 5, 7, 9, 11, 13 and 15 days). In all lines, the growth rates of cells were initially slow but as the culture proceeded, they increased significantly and accumulated great amounts of biomass over a period of 15 days. Medium containing high BAP (0.25 mg/l) and …

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Age Mediated Effects On The Alternative Respiratory Pathway In Leaves Of Rhodiola Rosea And Ajuga Reptans, Natalia V. Pystina, Roman A. Danilov Jan 2002

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, …

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A Study On The Epiphytic Algae Of The Nilüfer Stream (Bursa), Şükran Dere, Di̇dem Karacaoğlu, Nurhayat Dalkiran Jan 2002

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), …

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Phytoplankton Species' Succession And Nutrients In The Southern Black Sea (Bay Of Sinop), Muhammet Türkoğlu, Tufan Koray Jan 2002

Phytoplankton Species' Succession And Nutrients In The Southern Black Sea (Bay Of Sinop), Muhammet Türkoğlu, Tufan Koray

Turkish Journal of Botany

The succession, annual cycle and diversity of phytoplankton species and seasonal changes in nutrients in the southern Black Sea (around Sinop peninsula) were investigated between August 1995 and July 1996. One species of Cyanophyceae, 83 taxa of Dinophyceae, 1 species of Prymnesiophyceae, 5 taxa of Dictyochophyceae, 88 taxa of Bacillariophyceae and 1 species of Euglenophyceae were identified. A list of phytoplankton species together with annual variations was prepared. Changes in community structure, density and diversity are discussed in relation to the physico-chemical features of the water column.

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Perilla: A New Genus For Turkey, Ali̇ Arslan Dönmez Jan 2002

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.

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Macrofungi Of Ağrı Province, Kenan Demi̇rel, Yusuf Uzun, Abdullah Kaya Jan 2002

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.

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Flora Of Tuzaklı, Otluk, Gidefi Mountains And Surroundings (Akseki), Ahmet Duran Jan 2002

Flora Of Tuzaklı, Otluk, Gidefi Mountains And Surroundings (Akseki), Ahmet Duran

Turkish Journal of Botany

The natural and cultivated plants of Tuzaklı, Otluk, Gidefi mountains and their surroundings were studied between 1994 and 1997; 2486 herbarium specimens belonging to 1023 taxa, 484 genera and 98 families were collected and identified from the areas. Sixty-one taxa are cultivated and the rest are native plants. The phytogeographic elements are represented in the study area as follows: Mediterranean 360 (37.4%), Irano-Turanian 86 (8.9%) and Euro-Siberian 35 (3.6%). The phytogeographic regions of 481 (50%) taxa are either multi-regional or unknown. Phytogeographic regions are recommended for 12 taxa, of which phytogeographic regions have not been previously suggested. The life forms …

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Flora Of Kazankaya Canyon (Yozgat-Çorum), Ahmet Duran, Ergi̇n Hamzaoğlu Jan 2002

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.

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Influence Of The Inorganic Carbon Addition On Photosynthesis Of Algae And Some Macrophytes, Meri̇ç Albay, Jan Pokorny Jan 2002

Influence Of The Inorganic Carbon Addition On Photosynthesis Of Algae And Some Macrophytes, Meri̇ç Albay, Jan Pokorny

Turkish Journal of Botany

A two-step experiment was conducted in order to understand whether natural algal communities (fish-pond water) and selected macrophytes (Potamogeton pectinatus L. Elodea nuttallii (Planch.). St.John. and Utricularia L. sp.) + algae were limited by lack of inorganic carbon (IC). First, 0.6 ml 1 M KHCO_3- was added to the water of Vajgar and Ratmirovsky ponds, South Bohemia, and incubated for 180 minutes under 125 µE m^{-2} s^{-1} light. Then light intensity was increased to 150 µE m^{-2} s^{-1} and 0.6 ml 1 M KHCO_3- was added to selected macrophytes + Vajgar pond waters and incubated for 50 and 180 minutes. …

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