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2012

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Articles 121 - 150 of 224

Full-Text Articles in Botany

On The Rediscovery Of Euphorbia Amygdaloides Subsp. Robbiae And Its Type, Levent Can, Osman Erol, Gill Challen, Orhan Küçüker Jan 2012

On The Rediscovery Of Euphorbia Amygdaloides Subsp. Robbiae And Its Type, Levent Can, Osman Erol, Gill Challen, Orhan Küçüker

Turkish Journal of Botany

Euphorbia amygdaloides L. subsp. robbiae (Turrill) Stace was first collected by Mrs Mary Anne Robb. She collected a wild growing Euphorbia L. specimen in 1891 from an unknown locality near İstanbul, and carried this plant in a bonnet box to England. Since 1891, this well-known cultivated plant has not been collected from any wild locality. This paper reports the wild specimens from İstanbul with morphological detail. We also present the composite image illustrations of the specimen, and images of the type specimen. The article also reveals that the date of the type specimen of Euphorbia amygdaloides subsp. robbiae does not …

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Antioxidative And Physiological Responses Of Two Sunflower (Helianthus Annuus) Cultivars Under Peg-Mediated Drought Stress, Mehmet Cengi̇z Baloğlu, Musa Kavas, Gülsüm Aydin, Hüseyi̇n Avni̇ Öktem, Ayşe Meral Yücel Jan 2012

Antioxidative And Physiological Responses Of Two Sunflower (Helianthus Annuus) Cultivars Under Peg-Mediated Drought Stress, Mehmet Cengi̇z Baloğlu, Musa Kavas, Gülsüm Aydin, Hüseyi̇n Avni̇ Öktem, Ayşe Meral Yücel

Turkish Journal of Botany

Drought stress is one of the most important yield-reducing factors in crop production. Sunflower, an oilseed crop, is severely affected by abiotic stress. In this study, 2 sunflower cultivars (Musala and Aydın) were evaluated in terms of various biochemical and physiological responses under 2 different polyethylene glycol-mediated drought stress conditions. Stress-determining parameters such as malondialdehyde (MDA), hydrogen peroxide (H_{2}O_{2}), and proline contents were determined. Both cultivars showed similar responses at osmotic potentials of both -0.4 and -0.8 MPa. Aydın was less affected than Musala under these stress conditions. MDA, H_{2}O_{2}, and proline levels were similar at both -0.4 and -0.8 …

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Macrofungi Of Nakhchivan (Azerbaijan) Autonomous Republic, Hami̇de Seyi̇dova, Elşad Hüseyi̇n Jan 2012

Macrofungi Of Nakhchivan (Azerbaijan) Autonomous Republic, Hami̇de Seyi̇dova, Elşad Hüseyi̇n

Turkish Journal of Botany

In this article, an attempt has been made to establish the species composition of the macrofungi of Nakhchivan Autonomous Republic of Azerbaijan. A total of 73 species of macromycetes were registered, 2 belonging to the division Ascomycota and 71 to the division Basidiomycota. The trophic structure for the fungal species is as follows: 22 lignicolous and 51 terricolous. Fifty-three species were added to the Nakhchivan Autonomous Republic mycobiota; 8 species of them were added to the mycobiota of Azerbaijan as new records.

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Anatomical Findings Of Onobrychis Sect. Heliobrychis (Fabaceae) In Iran And Their Taxonomic Implications, Roya Karamian, Ali Moradi Behjou, Massoud Ranjbar Jan 2012

Anatomical Findings Of Onobrychis Sect. Heliobrychis (Fabaceae) In Iran And Their Taxonomic Implications, Roya Karamian, Ali Moradi Behjou, Massoud Ranjbar

Turkish Journal of Botany

Peduncle anatomy was investigated in 20 species of Onobrychis Miller sect. Heliobrychis Bunge from Iran by light microscopy. Ten quantitative and qualitative characters were studied in the peduncle cross sections. Results showed that qualitative characters represent considerable variations within the section, some of which such as outline shape of the peduncle cross section, density of papillae on hair surface, and position of cavities in peduncles are taxonomically important characters to differ annual species from perennials in the section. Four groups were distinguished within the perennial species according to peduncle anatomical characters. In addition, a key is provided for the taxa …

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Diversity And Ecology Of Diatoms From Felent Creek (Sakarya River Basin), Turkey, Cüneyd Nadi̇r Solak, Sophia Barinova, Eva Acs, Hayri̇ Dayioğlu Jan 2012

Diversity And Ecology Of Diatoms From Felent Creek (Sakarya River Basin), Turkey, Cüneyd Nadi̇r Solak, Sophia Barinova, Eva Acs, Hayri̇ Dayioğlu

Turkish Journal of Botany

Diatoms are an important group of aquatic ecosystems. To date, there have been many important algological studies in different river basins in Turkey. However, the use of diatoms in biomonitoring (according to diatom indices, Watanabe's or Van Dam's systems) is relatively new in Turkey. In the present study, 41 samples of epilithic diatoms were collected from 5 stations along Felent creek between June 2006 and February 2007 and a total of 117 diatom taxa were identified. The bio-indication (autoecology and abundance scores in the communities) of Felent creek was investigated and, as a result, the organic pollution indicators of Watanabe's …

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Taxonomical Notes On Stachys Sect. Eriostomum (Lamiaceae) In Turkey, Ekrem Akçi̇çek, Tuncay Di̇rmenci̇, Ekrem Dündar Jan 2012

Taxonomical Notes On Stachys Sect. Eriostomum (Lamiaceae) In Turkey, Ekrem Akçi̇çek, Tuncay Di̇rmenci̇, Ekrem Dündar

Turkish Journal of Botany

As a part of a revisional study of Stachys L. sect. Eriostomum (Hoffmanns. & Link) Dumort. (Lamiaceae), 4 taxa [S. tymphaea Hausskn., S. thracica Davidov, S. cretica L. subsp. cretica, and S. cretica L. subsp. salviifolia (Ten.) Rech.f.] were recorded for the first time from Turkey. S. cretica subsp. trapezuntica Rech.f., which was described based on 3 syntypes [Bourgeau 695; Sintenis 3432 (designated here as the lectotype); Handel-Mazzetti 324] near Trabzon, had not been collected again since 1907. It was found in 2 syntype localities from Trabzon in 2010 during this study, for the first time in 103 years. For …

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The Relationship Between The Antioxidant System And Phycocyanin Production In Spirulina Maxima With Respect To Nitrate Concentration, Razi̇ye Öztürk Ürek, Leman Tarhan Jan 2012

The Relationship Between The Antioxidant System And Phycocyanin Production In Spirulina Maxima With Respect To Nitrate Concentration, Razi̇ye Öztürk Ürek, Leman Tarhan

Turkish Journal of Botany

The relationship among antioxidant enzyme activities, such as iron-superoxide dismutase (FeSOD) and ascorbate-dependent peroxidase (AsA-POD), and phycocyanin, chlorophyll, total carotenoid, ascorbate contents, and lipid peroxidation (LPO) levels were investigated in Spirulina maxima SAG 84.79 in nitrate limited (10 mM), control (30 mM), and supplemented (50 mM) conditions. In the present study, extracellular nitrate and intracellular iron, magnesium, and copper levels were also investigated. The highest FeSOD and AsA-POD activities and chlorophyll content and the lowest LPO levels were found in control conditions on day 13: 21.9 ± 1.5, 5.7 ± 0.3 IU mg^{-1}, 16.2 ± 0.5 mg g^{-1}, and 0.322 …

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Influence Of Mycorrhizal Strategy On The Foliar Traits Of The Plants On The Tibetan Plateau In Response To Precipitation And Temperature, Zhaoyong Shi, Yanying Liu, Fayuan Wang, Yinglong Chen Jan 2012

Influence Of Mycorrhizal Strategy On The Foliar Traits Of The Plants On The Tibetan Plateau In Response To Precipitation And Temperature, Zhaoyong Shi, Yanying Liu, Fayuan Wang, Yinglong Chen

Turkish Journal of Botany

Mycorrhizas play key roles in important ecosystem processes and functions. To enhance our understanding of the impact of mycorrhizal strategies on important foliar traits of host plants and their response to climate changes, we analysed 6 selected foliar traits among 54 plant species in 129 sampling sites of ascertained mycorrhizal types on the Tibetan Plateau based on their functional groups. The selected traits were leaf mass per area (LMA), nitrogen concentration (on mass and area bases, N_{mass} and N_{area}, respectively), photosynthetic capacity (A_{mass} and A_{area}) and photosynthetic nitrogen use efficiency (PNUE). The analysed foliar traits showed no significant difference between …

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Experimental And Molecular Studies Of Bryophyte Dispersal On Alpine Summits, Sean Charles Robinson Jan 2012

Experimental And Molecular Studies Of Bryophyte Dispersal On Alpine Summits, Sean Charles Robinson

Legacy Theses & Dissertations (2009 - 2024)

A review of bryophyte dispersal studies over the last sixty years revealed that the role of gametophytic fragments in bryophyte population dynamics has not been adequately addressed. In this dissertation, I investigate the dispersal potential of wind blown bryophyte fragments on Adirondack alpine summits using a combination of field and laboratory methods.

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An Evaluation Of The Species Status Of Physaria Intermedia (Brassicaceae), Katie Arp Jan 2012

An Evaluation Of The Species Status Of Physaria Intermedia (Brassicaceae), Katie Arp

Honors Program Theses

The taxonomy of the genus Physaria (Brassicaceae) has been continually under revision as many species groups have proved difficult to resolve. Physaria intermedia (S. Watson) O'Kane Al-Shehbaz, has been a species whose circumscription has more recently been questioned and in need of clarification. The uncertainty surrounding the species stemmed from a combination of its geographical distribution, inhabiting two disjunct locations, as well as some minor differences in morphology that warranted a closer look. The species had been described as occupying southern Utah, northern and eastern (in northern 2/3) Arizona and southwest New Mexico with the remaining specimens inhabiting an isolated …

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Survey Of The Native And Nonnative Vascular Plant Species Of Three Islands In Lake Winnipesaukee, New Hampshire, Mark Gardner Winkler Jan 2012

Survey Of The Native And Nonnative Vascular Plant Species Of Three Islands In Lake Winnipesaukee, New Hampshire, Mark Gardner Winkler

Electronic Theses and Dissertations

This study examined the long-term patterns in vascular plant composition on three islands in Lake Winnipesaukee, NH. It also tested the role of island biogeography in ecology as it analyzed the effectiveness of a land use plan implemented on the islands. Samplings were made on the islands in the summer of 2011 and were compared to earlier samplings in 1978, 1991, and 2001. The flora was observed and measured in 25 permanent plots that were established on the three islands in 1978. The understory flora was measured by presence and percent cover and the overstory was measured by frequency and …

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Botanical Garden News, Georgia Southern University Jan 2012

Botanical Garden News, Georgia Southern University

Garden of the Coastal Plain (Archived)

No abstract provided.

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Contents, Discovery Editors Jan 2012

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 2012

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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Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson Jan 2012

Efficacy Of A Novel Molecular Tool In Silencing Arabidopsis Genes, Chase Purnell, Vibha Srivastava, M. Aydin Akbudak, Scott J. Nicholson

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

RNA interference (RNAi), a pathway capable of silencing genes, has until recently only been achievable in the laboratory by the use of one method, expression of inverted repeat sequences of DNA. These constructs generate a double-stranded RNA, which in turn induce post-transcriptional silencing of other genes that bear sequence homology with the transgene. This approach of targeted gene silencing is extremely useful for studying the function of genes and engineering new traits in both plants and animals. It has recently been discovered that a transgene lacking the polyadenylation signal, called a truncated transgene, is also capable of inducing RNAi in …

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Air Pollution Effects On Flavonoids In Pollen Grains Of Some Ornamental Plants, Farkhondeh Rezanejad Jan 2012

Air Pollution Effects On Flavonoids In Pollen Grains Of Some Ornamental Plants, Farkhondeh Rezanejad

Turkish Journal of Botany

Phenolic compounds function as stress indicators because they accumulate to high levels in many plant tissues in response to a wide range of biotic and abiotic signals. These compounds are involved in pollen development, pollination, pollen germination, and pollen tube growth. The mature pollen grains of Spartium junceum L., Lagerstroemia indica L., Thuja orientalis L., and Petunia hybrida L. collected from control (less polluted) and polluted areas [mainly SO_2, NO_2, CO, hydrocarbons (HC), and airborne particulate material (APM)]. The ethanolic aquatic extracts of pollen grains were prepared. The extracts were analysed by high pressure liquid chromatography (HPLC). HPLC analysis demonstrated …

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Assessment Of Morphological Variation In Irish Brassica Oleracea Species, Mohamed El-Esawi, Paula Bourke, Kieran Germaine, Renee Malone Jan 2012

Assessment Of Morphological Variation In Irish Brassica Oleracea Species, Mohamed El-Esawi, Paula Bourke, Kieran Germaine, Renee Malone

Articles

This study aimed at assessing the morphological variation in 25 accessions of an Irish collection of Brassica oleracea using 44 morphological traits. The morphological traits showed a pronounced variation among accessions. Vegetative preflowering and maturity traits revealed higher variation than seedling traits. Of the 44 morphological descriptors used, 28 were significantly different and proved useful in examining diversity and differentiating among accessions studied. Principal component analysis (PCA) showed variation among accessions, where 87.24% of the total variation in the morphological data was separated on the first five components, indicating a high degree of correlation among traits studied. Cluster analysis grouped …

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Greenhouse Production Of Strawberries During The Winter, Ellen T. Paparozzi, George E. Meyer, Stacy A. Adams, M. Elizabeth Conley, Benjamin A. Loseke, Paul E. Read Jan 2012

Greenhouse Production Of Strawberries During The Winter, Ellen T. Paparozzi, George E. Meyer, Stacy A. Adams, M. Elizabeth Conley, Benjamin A. Loseke, Paul E. Read

Department of Agronomy and Horticulture: Faculty Publications

Strawberries are one of America’s favorite fruits and are available in grocery stores year round. Given increased shipping and other associated costs as well as the opportunity to provide a fresh, nutritious, local product, our research team is exploring the feasibility of growing strawberries during the winter in Nebraska.

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Productivity Of Field Pea (Pisumsativum L.) And Spring Oat (Avena Sativa L.) Grown As Sole And Intercrops Under Different Nitrogen Levels, Chengchou Han, Christopher Borman, Dori Osantowski, Jeremy Wagnitz, Katja Koehler-Cole, Kevin Korus, Evan Sonderegger, Rodrigo Werle, Tara Wood, John L. Lindquist Jan 2012

Productivity Of Field Pea (Pisumsativum L.) And Spring Oat (Avena Sativa L.) Grown As Sole And Intercrops Under Different Nitrogen Levels, Chengchou Han, Christopher Borman, Dori Osantowski, Jeremy Wagnitz, Katja Koehler-Cole, Kevin Korus, Evan Sonderegger, Rodrigo Werle, Tara Wood, John L. Lindquist

Department of Agronomy and Horticulture: Faculty Publications

Intercropping cereal grains and legumes has potential as an alternative cool-season forage crop in low-input farming systems. The objectives of this study were to quantify the effects of density, species proportion, and nitrogen (N) supply on the biomass accumulation of field pea and spring oat grown as sole or intercrops. Greenhouse experiments were conducted using an additive series experimental design. Treatments included three fertilizer N rates and 20 density/proportion combinations in a randomized complete block with four replications. Sole plant densities included 2, 3, 4, 5 plants of each species pot-1 (16 cm in diameter, 16 cm in height). The …

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The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter Jan 2012

The Southern Arkansas University Biodiversity Collections, S. E. Krosnick, K. S. Dockter

Journal of the Arkansas Academy of Science

No abstract provided.

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A New Record For The Flora Of Turkey: Lathyrus Atropatanus (Leguminosae), Fatma Güneş, Ali̇ Hi̇kmet Çirpici Jan 2012

A New Record For The Flora Of Turkey: Lathyrus Atropatanus (Leguminosae), Fatma Güneş, Ali̇ Hi̇kmet Çirpici

Turkish Journal of Botany

No abstract provided.

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Sfa Gardens Newsletter, Winter 2012, Sfa Gardens, Stephen F. Austin State University Jan 2012

Sfa Gardens Newsletter, Winter 2012, Sfa Gardens, Stephen F. Austin State University

SFA Gardens Newsletters

No abstract provided.

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Molecular Phylogenetics Of Alternanthera (Gomphrenoideae, Amaranthaceae): Resolving A Complex Taxonomic History Caused By Different Interpretations Of Morphological Characters In A Lineage With C4 And C3-C4 Intermediate Species, Ivonne Sánchez-Del Pino, Timothy J. Motley, Thomas Borsch Jan 2012

Molecular Phylogenetics Of Alternanthera (Gomphrenoideae, Amaranthaceae): Resolving A Complex Taxonomic History Caused By Different Interpretations Of Morphological Characters In A Lineage With C4 And C3-C4 Intermediate Species, Ivonne Sánchez-Del Pino, Timothy J. Motley, Thomas Borsch

Biological Sciences Faculty Publications

Aternanthera (Amaranthaceae) is a diverse genus (80-200 species) largely restricted to the American Tropics. With Pedersenia and Tidestromia, it makes up the Alternantheroid clade in Gomphrenoideae. Parsimony and Bayesian analyses of nucleotide sequences of nuclear (ITS) and plastid (rpl16, trnL-F) and morphological characters identify that the capitate stigma of Alternanthera is a synapomorpy within the Alternantheroids. Within Alternanthera, two major clades were resolved, both of which were marked by otherwise homoplasious characters of the gynoecium: Clade A [99% jackknife (JK); 1.0 posterior probability (PP)] with nine species and Clade B (60% JK; 0.98 PP) with 22 …

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Reproductive Biology Studies Towards The Conservation Of Two Rare Species Of Colchic Flora, Arbutus Andrachne And Osmanthus Decorus, Nina Melia, Laura Gabedava, Tinatin Barblishvili, Lali Jgenti Jan 2012

Reproductive Biology Studies Towards The Conservation Of Two Rare Species Of Colchic Flora, Arbutus Andrachne And Osmanthus Decorus, Nina Melia, Laura Gabedava, Tinatin Barblishvili, Lali Jgenti

Turkish Journal of Botany

Our study examines the structural peculiarities of the generative sphere at different phases of development, and the processes of pollination, fertilisation, and seed formation in 2 species of wild flora: Arbutus andrachne L. (Ericaceae), the eastern strawberry tree, and Osmanthus decorus (Boiss. & Balansa) Kasapligil (Oleaceae), Caucasian osmanthus. These Arcto-Tertiary plants are included in the Red Data Book of the Georgian SSR. As germinable seeds are the main factor determining species distribution and the complete transfer of genetic information, the aim of our research was to establish the self-regeneration capacity of the species under study and choose optimum conditions for …

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Lectotypification Of Symphytum Anatolicum (Boraginaceae), Burcu Tarikahya Hacioğlu, Sadik Eri̇k Jan 2012

Lectotypification Of Symphytum Anatolicum (Boraginaceae), Burcu Tarikahya Hacioğlu, Sadik Eri̇k

Turkish Journal of Botany

Symphytum anatolicum Boiss. is an endemic species in the Flora of Turkey and the East Aegean Islands. It was first collected by d'Urville on the island of Cos in 1820 and named Symphytum asperrimum d'Urv. The plant was again collected by Boissier near İzmir (Smyrna) in 1842, and described by him as S. anatolicum in 1844. There are 4 collections mentioned in the protologue in Boissier's Flora Orientalis (1879). The herbarium specimen "Hab. in umbrosis montium circa Smyrnam", housed in G-Boiss. Herbarium, was chosen as lectotype as it best represents the species description.

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Reassessment Of Conservation Status Of The Genus Salvia (Lamiaceae) In Turkey Ii, Ahmet Kahraman, Safi Bagherpour, Ersi̇n Karabacak, Musa Doğan, Hakan Mete Doğan, İsmet Uysal, Ferhat Celep Jan 2012

Reassessment Of Conservation Status Of The Genus Salvia (Lamiaceae) In Turkey Ii, Ahmet Kahraman, Safi Bagherpour, Ersi̇n Karabacak, Musa Doğan, Hakan Mete Doğan, İsmet Uysal, Ferhat Celep

Turkish Journal of Botany

The current conservation status of the Salvia L. (sage) taxa of the family Lamiaceae distributed in the East, South-East, Central, North Anatolian, and Marmara geographic regions of Turkey was reassessed at regional, national, and global levels using IUCN Red List categories and criteria. In accordance with the present taxonomic revision of the genus since 2005, the study area seems to cover 79 taxa, 36 of which are endemic and 4 of which are rare nonendemic; the remaining 39 taxa are widely distributed. The rate of endemism is 46% in the area. Based on new field observations of populations and distribution …

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A New Species Of Ornithogalum (Hyacinthaceae) From East Anatolia, Turkey, Bi̇rol Mutlu, Şükrü Karakuş Jan 2012

A New Species Of Ornithogalum (Hyacinthaceae) From East Anatolia, Turkey, Bi̇rol Mutlu, Şükrü Karakuş

Turkish Journal of Botany

Ornithogalum malatyanum Mutlu is described as a new species from Malatya Province, East Anatolia, Turkey. A description, photographs, and an identification key including related species are given. The International Union for Conservation of Nature threat category and observations on the ecology of the populations are noted. The chromosome number of the new species is 2n = 24. The morphological differences between the new species and related taxa are also discussed.

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Five New Records Of The Genus Echinops (Asteraceae) From Turkey, Cem Vural, Handan Şapci Jan 2012

Five New Records Of The Genus Echinops (Asteraceae) From Turkey, Cem Vural, Handan Şapci

Turkish Journal of Botany

Echinops ritrodes Bunge, E. gaillardotii Boiss., E. adenocaulos Boiss., E. chardinii Boiss. & Buhse, and E. tenuisectus Rech.f. were recorded for the first time in Turkey. The taxa are described and illustrated. Geographical distributions of the taxa are also mapped, and IUCN threat categories of the populations are discussed.

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A Simple Technique For Cross-Sectioning Gymnosperm Needle Leaves Using Microtome, Jukyeong Eo Jan 2012

A Simple Technique For Cross-Sectioning Gymnosperm Needle Leaves Using Microtome, Jukyeong Eo

Turkish Journal of Botany

If a staining-permanent slide is not needed, this simple and faster microtome technique is very useful for cross-sectioning gymnosperm needle leaves. The technique employs 2× polyvinyl alcohol-lactic acid-glycerol (PVLG) without the steps of fixation, dehydration, clearing, embedding, deparaffinisation, and hydration. Conveniently, this technique can also be applied to thick leaves and other organs of angiosperms. The procedure is very simple and is suggested for use in plant anatomy research.

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Chromosome Counts And Karyomorphology Of Some Species Of Artemisia (Asteraceae) From Turkey, Selma Tabur, Şemsetti̇n Ci̇velek, Si̇ğnem Öney, Şadi̇ye Betül Yilmaz Ergün, Murat Kurşat, İsmai̇l Türkoğlu Jan 2012

Chromosome Counts And Karyomorphology Of Some Species Of Artemisia (Asteraceae) From Turkey, Selma Tabur, Şemsetti̇n Ci̇velek, Si̇ğnem Öney, Şadi̇ye Betül Yilmaz Ergün, Murat Kurşat, İsmai̇l Türkoğlu

Turkish Journal of Botany

Chromosome numbers and karyotypes of some species belonging to the genus Artemisia L. (Asteraceae) were investigated, and chromosome counts of 12 species, 1 of which was counted for the first time, are presented with a thorough compilation of previously published data. All of the species studied belong to the subgenus Artemisia Chromosome numbers of 6 taxa confirmed the previous data. Additionally, karyotypes of 8 species were reported. Karyotype analyses of 6 Artemisia species are reported here for the first time. The basic chromosome numbers in the species studied were x = 8 and x = 9, with ploidy levels ranging …

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