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2002

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Articles 121 - 150 of 186

Full-Text Articles in Botany

Compensation For Herbivory In Wild Sunflower: Response To Simulated Damage By The Head-Clipping Weevil, Diana Pilson, Karin L. Decker Jan 2002

Compensation For Herbivory In Wild Sunflower: Response To Simulated Damage By The Head-Clipping Weevil, Diana Pilson, Karin L. Decker

Diana Pilson Publications

Herbivore damage is generally detrimental to plant fitness, and the evolutionary response of plant populations to damage can involve either increased resistance or increased tolerance. While characters that contribute to resistance, such as secondary chemicals and trichomes, are relatively well understood, characters that contribute to a plant’s ability to tolerate damage have received much less attention. Using Helianthus annuus (wild sunflower) and simulated damage of Haplorhynchites aeneus (head-clipping weevil) as a model system, we examined morphological characters and developmental processes that contribute to compensatory ability. We performed a factorial experiment that included three levels of damage (none, the first two, …

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The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez Jan 2002

The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez

Aliso: A Journal of Systematic and Floristic Botany

The first ever chromosome report for the monotypic genus Schaffnerella (Grarnineae, Chloridoideae) is 2n = 20 (10 II) from pollen parent cells at diakinesis, which indicates diploidy and a base number of 10. The close relative Lycurus likewise has x = 10, but is tetraploid (2n = 4x = 40).

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Letter From The Dean, Gregory J. Weidemann Jan 2002

Letter From The Dean, Gregory J. Weidemann

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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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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Effect Of Indole-3-Butyric Acid On In Vitro Root Development In Lentil (Lens Culinaris Medik.), Khalid Mahmood Khawar, Sebahatti̇n Özcan Jan 2002

Effect Of Indole-3-Butyric Acid On In Vitro Root Development In Lentil (Lens Culinaris Medik.), Khalid Mahmood Khawar, Sebahatti̇n Özcan

Turkish Journal of Botany

Lentil is an important crop of the family Leguminosae and is notoriously recalcitrant to rooting in vitro. Shoots of cultivar \"Ali Dayı\" of lentil obtained after culturing seeds for 10 days on MS medium were isolated and rooted on MS medium containing indole-3-butyric acid (IBA) at concentrations of 0.25, 0.5, 1.0 and 2.0 mg/l. The primary response was obtained after 4 weeks; 0.25 mg/l IBA gave the best results, with a rooting percentage of 25%, mean number of 7.87 roots along with mean root length of 7.13 cm. However, all other concentrations of IBA failed to induce roots.

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A Note On Cheilothela Chloropus (Brid.) Lindb. (Ditrichaceae, Musci) In Turkey, Adnan Erdağ Jan 2002

A Note On Cheilothela Chloropus (Brid.) Lindb. (Ditrichaceae, Musci) In Turkey, Adnan Erdağ

Turkish Journal of Botany

Fruiting specimens of Cheilothela chloropus (Brid.) Lindb. were collected and illustrated for the first time from the southwest of Turkey. A description and the distribution of the species are given to provide a contribution for further studies on Turkish mosses.

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Macrofungi Of Değirmenboğazı (Balıkesir), Fadi̇me Yilmaz, Mustafa Işiloğlu Jan 2002

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.

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Liverworts (Marchantiopsida) Of The Dilek Peninsula National Park, Hati̇ce Özenoğlu Ki̇remi̇t, İsa Gökler Jan 2002

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.

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The Flora And Vegetation Of Kunduz Forests (Vezirköprü / Samsun), Fazil Özen, Mahmut Kilinç Jan 2002

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 …

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The Planktonic Diatoms Of Lake Çıldır (Ardahan-Turkey), Aydin Akbulut, Kazim Yildiz Jan 2002

The Planktonic Diatoms Of Lake Çıldır (Ardahan-Turkey), Aydin Akbulut, Kazim Yildiz

Turkish Journal of Botany

This paper describes the planktonic diatom flora of Lake Çıldır. Samples were collected monthly between May 1991 and September 1993 at three different stations. A total of 94 diatom taxa were identified. In the study period, the most dominant and abundant taxa were Cyclotella meneghiniana Kütz., Aulacoseria granulata (Ehrenb.) Simonsen, Melosira varians C.Agardh and Navicula Bory spp. The diatom flora of the lake is rich in species and varieties and is similar to that in other parts of Turkey.

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P-Protein Structure In Functional And Non-Functional Secondary Phloem In Armeniaca Vulgaris Lam. (Rosaceae), Gönül Algan, H. Nurhan Bakar Büyükkartal Jan 2002

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.

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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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Extraction Of Silymarin Compounds From Milk Thistle (Silybum Marianum) Seed Using Hot, Liquid Water As The Solvent, J. F. Alvarez Barreto, D. Julie Carrier, E. C. Clausen Jan 2002

Extraction Of Silymarin Compounds From Milk Thistle (Silybum Marianum) Seed Using Hot, Liquid Water As The Solvent, J. F. Alvarez Barreto, D. Julie Carrier, E. C. Clausen

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

High-value specialty chemicals are usually obtained from natural products by extracting with generally regarded as safe (GRAS) solvents. Because organic solvents are quite often used, high operating and disposal costs occur. When compared to traditional solvents, water is an interesting alternative because of its low operating and disposal costs. Milk thistle contains compounds (taxifolin, silychristin, silydianin, silybinin A, and silybinin B) that display hepatoxic protection properties. This paper examines the batch extraction of silymarin compounds from milk thistle seed meal in 50°C, 70°C, 85°C and 100°C water as a function of time. For taxifolin, silychristin, silybinin A, and silybinin B, …

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Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 3 2002, Several Authors Jan 2002

Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 3 2002, Several Authors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Contents, Discovery Editors Jan 2002

Contents, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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Instructions For Authors, Discovery Editors Jan 2002

Instructions For Authors, Discovery Editors

Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences

No abstract provided.

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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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Floristic Records Of Lichens In Adana, Konya And Niğde Provinces, Şaban Güvenç Jan 2002

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.

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Growth, Proline Accumulation And Ionic Relations Of Tomato (Lycopersicon Esculentum L.) As Influenced By Nacl And Na_2so_4 Salinity, Ali̇ İnal Jan 2002

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 …

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Changes In Abscisic Acid And Indole-3-Acetic Acid Concentrations In Funalia Trogii (Berk.) Bondartsev & Singer And Phanerochaete Chrysosporium Burds. Me446 Subjected To Salt Stress, Serpi̇l Ünyayar Jan 2002

Changes In Abscisic Acid And Indole-3-Acetic Acid Concentrations In Funalia Trogii (Berk.) Bondartsev & Singer And Phanerochaete Chrysosporium Burds. Me446 Subjected To Salt Stress, Serpi̇l Ünyayar

Turkish Journal of Botany

Variations in abscisic acid (ABA) and indole-3-acetic acid (IAA) concentrations were studied in Funalia trogii (Berk.) Bondartsev & Singer and Phanerochaete chrysosporium Burds. ME446 subjected to salt stress. The levels of ABA and IAA were determined by gas chromatography (GC) and UV-VIS spectrophotometry. The levels of hormones vary in the regulation of growth and in response to stress. It was found that ABA concentrations were higher in the salt stressed groups than in the control groups, whereas IAA concentrations were lower. These results show that, in fungi, ABA concentrations are positively and IAA concentrations negatively correlated with salt stress.

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An Experimental Approach To Examining The Effect Of Water Depth And Lemna Minor L. On Algal Growth, Hani̇fe Özbay Jan 2002

An Experimental Approach To Examining The Effect Of Water Depth And Lemna Minor L. On Algal Growth, Hani̇fe Özbay

Turkish Journal of Botany

In order to test how both water depth and Lemna minor L. affect the growth rate of algae, two different experiments were designed. In the first experiment, Scenedesmus quadricauda (Turp.) Breb. was cultured in sterilized Steinberg solution with reduced N and P levels in plastic containers at depths of 5, 10, 15 and 20cm. At the end of the experiment, differences in algal growth with depth were found to be significant between a) 5 cm with 10 cm, 15 cm and 20 cm, and b) 10 cm with 15 and 20 cm depth treatments (p

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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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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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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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A New Record For The Myxomycetes Flora Of Turkey: Comatricha Pulchella (C.Bab.) Rost. Var. Pulchella, C. Cem Ergül, Başaran Dülger Jan 2002

A New Record For The Myxomycetes Flora Of Turkey: Comatricha Pulchella (C.Bab.) Rost. Var. Pulchella, C. Cem Ergül, Başaran Dülger

Turkish Journal of Botany

Comatricha pulchella (C.Bab.) Rost. var. pulchella is recorded for the first time from Turkey.

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New Records For The Lichen Flora Of Turkey, Kenan Yazici, Ali̇ Aslan Jan 2002

New Records For The Lichen Flora Of Turkey, Kenan Yazici, Ali̇ Aslan

Turkish Journal of Botany

In this study, 6 new lichen species belonging to 4 families of Ascomycotina have been defined for Turkey. Their distribution and substrata are given.

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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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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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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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