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2015

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Articles 181 - 210 of 334

Full-Text Articles in Botany

Seed Micromorphology In Dactylorhiza Necker Ex Nevski (Orchidaceae) And Allied Genera, Roberto Gamarra, Pablo Galan, Henrik Aerenlund Pedersen, Emma Ortunez, Ernesto Sanz Jan 2015

Seed Micromorphology In Dactylorhiza Necker Ex Nevski (Orchidaceae) And Allied Genera, Roberto Gamarra, Pablo Galan, Henrik Aerenlund Pedersen, Emma Ortunez, Ernesto Sanz

Turkish Journal of Botany

Seeds of 21 taxa of the genera Dactylorhiza (incl. Coeloglossum), Gymnadenia (incl. Nigritella) and Pseudorchis were examined by light microscope and SEM. Qualitative and quantitative characters were analyzed. In Dactylorhiza, the seeds are fusiform, but some populations of D. viridis show clavate seeds. According to the ornamentation of the periclinal walls, 3 types of seeds are recognized in this genus. The considerable variation in the seed coat ornamentation pattern in the taxa belonging to majalis, maculata, and praetermissa groups of the genus Dactylorhiza is congruent with the genetic processes that occurred during the history of this genus. Gymnadenia shows clavate …

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The Modified Qualities Of Basil Plants By Selenium And/Or Ascorbic Acid, Zahra Oraghi Ardebili, Narges Oraghi Ardebili, Sara Jalili, Somayeh Safiallah Jan 2015

The Modified Qualities Of Basil Plants By Selenium And/Or Ascorbic Acid, Zahra Oraghi Ardebili, Narges Oraghi Ardebili, Sara Jalili, Somayeh Safiallah

Turkish Journal of Botany

The current research aimed to evaluate the possible impacts of foliar supplementations of selenium (Se) and/or ascorbic acid (AsA) on basil. Seedlings were foliarly treated with 4 concentrations of Se (0, 30, 60, and 120 mg L-1) and/or 2 levels of AsA (0 and 200 mg L-1), 2 times with 2-week intervals. In contrast to Se30, chla contents were significantly decreased by Se120 compared with the control. Se applications had a reducing effect on chlb contents. Se and/or AsA treated plants exhibited higher contents of carotenoid. The antioxidative system was affected by the applied treatments as it was indicated by …

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Syntaxonomic Analysis Of The Preforest And Forest Vegetation In The Thermo- And Eumediterranean Zone Around Antalya Gulf, Turkey, Lati̇f Kurt, Ali̇ Osman Ketenoğlu, Yildirim Akman, Ebru Özdeni̇z, Fatoş Şekerci̇ler, Ayşenur Bölükbaşi, Beste Gi̇zem Özbey Jan 2015

Syntaxonomic Analysis Of The Preforest And Forest Vegetation In The Thermo- And Eumediterranean Zone Around Antalya Gulf, Turkey, Lati̇f Kurt, Ali̇ Osman Ketenoğlu, Yildirim Akman, Ebru Özdeni̇z, Fatoş Şekerci̇ler, Ayşenur Bölükbaşi, Beste Gi̇zem Özbey

Turkish Journal of Botany

The aim of the current study was to reveal the syntaxonomical structure of Pinus brutia Ten. Forests and the preforest communities in the vicinity of Antalya Gulf. Of the preforest communities, Dorsytaecho hastatae-Oleutum oleastri ass. Nova is individualized as a paraclimax association. Although little is known about the syntaxonomy of the communities of cliff, rupicolous, and mural communities in the thermomediterranean zone, these are connected with the classes Asplenietea trichomanis (Br.-Bl. İn Meier and Br.-Bl. 1934) Oberd. 1977 and Onosmetalia frutescentis Quézel 1964. In the west of the gulf, Phlomido bourgaei-Pinetum brutiae Akman et al. 1998 and its three subassociations …

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Expanding The Understanding Of A Forest Ectomycorrhizal Community By Combining Root Tips And Fruiting Bodies: A Case Study Of Tuber Magnatum Stands, Giorgio Lalli, Marco Leonardi, Marilena Oddis, Giovanni Pacioni, Elena Salerni, Mirco Iotti, Alessandra Zambonelli Jan 2015

Expanding The Understanding Of A Forest Ectomycorrhizal Community By Combining Root Tips And Fruiting Bodies: A Case Study Of Tuber Magnatum Stands, Giorgio Lalli, Marco Leonardi, Marilena Oddis, Giovanni Pacioni, Elena Salerni, Mirco Iotti, Alessandra Zambonelli

Turkish Journal of Botany

A survey of both ectomycorrhizal (ECM) root tips and fruiting bodies of ECM fungi was carried out during a four-year period (2009-2012) in two similar forest stands in central Italy, previously investigated in detail being habitats of the Italian white truffle Tuber magnatum Pico. This research is one of the few conducted in mixed forest stands and, for the first time, it took into account the cryptic fungi (corticiaceous, hypogeous, and sclerotia). This survey led to an exhaustive description of the ECM community by integrating all the 197 taxa recorded (147 species as fruiting bodies, 65 as ectomycorrhizas, and 15 …

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Lyophyllum Turcicum (Agaricomycetes: Lyophyllaceae), A New Species From Turkey, Ertuğrul Sesli̇, Alfredo Vizzini, Marco Contu Jan 2015

Lyophyllum Turcicum (Agaricomycetes: Lyophyllaceae), A New Species From Turkey, Ertuğrul Sesli̇, Alfredo Vizzini, Marco Contu

Turkish Journal of Botany

A new species, Lyophyllum turcicum, from the Kümbet plateau of the Dereli district in Giresun Province, Turkey, is described, taxonomically delimited, and illustrated based on morphological and molecular data. The new species belongs to a small group of species in the Lyophyllum sect. Difformia as traditionally circumscribed. Lyophyllum turcicum is easily distinguished mainly by the light tinges of the basidiomes, filiform-fusiform to cylindro-flexuose marginal cells, and elongate, ellipsoid spores.

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Differential Expression Of Soluble Pyrophosphatase Isoforms In Arabidopsis Upon External Stimuli, Zahi̇de Nesli̇han Öztürk, Steffen Greiner, Thomas Rausch Jan 2015

Differential Expression Of Soluble Pyrophosphatase Isoforms In Arabidopsis Upon External Stimuli, Zahi̇de Nesli̇han Öztürk, Steffen Greiner, Thomas Rausch

Turkish Journal of Botany

In plants, pyrophosphate (PPi), generated in a wide range of reversible anabolic reactions, is hydrolyzed by pyrophosphatases. The presence of tonoplast- and Golgi-integral H+-translocating pyrophosphatases in plants led to the conclusion that plant cytosol has no soluble pyrophosphatase activity. However, the Arabidopsis thaliana (L.) Heynh. Genome also encodes five soluble pyrophosphatase isoforms (Ppas). There are almost no data in the literature on their redundancy in plant metabolism; therefore, we performed expression analyses of A. Thaliana soluble pyrophosphatase isoforms in response to external stimuli including carbohydrate status, hormone action, and stress exposure. The results revealed pronounced specificity for each isoform. Interestingly, …

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Influence Of Culture Media And Carbon Sources On Biomass Productivity And Oil Content Of The Algae Sirogonium Sticticum, Temnogyra Reflexa, Uronema Elongatum, And Chroococcus Turgidus, Aftab Alam, Saleem Ullah, Sahib Alam, Hamid Ullah Shah, Saadia Aftab, Muhammad Siddiq, Nazish Manzoor Jan 2015

Influence Of Culture Media And Carbon Sources On Biomass Productivity And Oil Content Of The Algae Sirogonium Sticticum, Temnogyra Reflexa, Uronema Elongatum, And Chroococcus Turgidus, Aftab Alam, Saleem Ullah, Sahib Alam, Hamid Ullah Shah, Saadia Aftab, Muhammad Siddiq, Nazish Manzoor

Turkish Journal of Botany

The aim of the present study was to investigate the effect of nutritional formulations, viz. Bristol's medium (BM), water extract of dairy waste (DW), commercial fertilizers mix (FM), and carbon sources such as NaHCO3, CaCO3, and wheat flour hydrolysate on the biomass productivity and oil content of the algal species Sirogonium sticticum, Temnogyra reflexa, Uronema elongatum, and Chroococcus turgidus. Among the nutritional formulations tested, BM showed the highest average effect, followed by DW, on the biomass and oil contents of the species. As for carbon sources, CaCO3 was more efficient in enhancing algal biomass, while NaHCO3 was proficient in increasing …

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Promotive Effect Of Exogenously Applied Thiourea On Key Physiological Parametersand Oxidative Defense Mechanism In Salt-Stressed Zea Mays L. Plants, Cengi̇z Kaya, Muhammad Ashraf, Osman Sönmez Jan 2015

Promotive Effect Of Exogenously Applied Thiourea On Key Physiological Parametersand Oxidative Defense Mechanism In Salt-Stressed Zea Mays L. Plants, Cengi̇z Kaya, Muhammad Ashraf, Osman Sönmez

Turkish Journal of Botany

A greenhouse experiment was conducted to examine the alleviating role of thiourea (TU) on antioxidants and some vital physiological attributes in salt-stressed plants of two maize cultivars. The maize cv. DK 5783 performed better than cv. Apex 836 in an initial experiment. Of the six TU levels used in the initial experiment, 400 and 500 mg L-1 were chosen for subsequent studies. The two cultivars were subjected to saline stress (100 mM NaCl) and two levels of TU were applied presowing or as foliage spray. Salt stress suppressed total biomass, maximum fluorescence yield (Fv/Fm), chlorophyll, and leaf water potential ($\Psi$w), …

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Effects Of Cobalt Nanoparticles On Artemisinin Production And Gene Expression In Artemisia Annua, Bita Ghasemi, Ramin Hosseini, Fatemeh Dehghan Nayeri Jan 2015

Effects Of Cobalt Nanoparticles On Artemisinin Production And Gene Expression In Artemisia Annua, Bita Ghasemi, Ramin Hosseini, Fatemeh Dehghan Nayeri

Turkish Journal of Botany

The low artemisinin content in Artemisia has caused this compound to be expensive among medicines. Several attempts have been made to increase its production by altering the expression of different genes. However, no approach has been cost-effective. In this study, the expression levels of SQS and DBR2 genes were quantified by qRT-PCR, and artemisinin content was measured by HPLC in Artemisia annua cell suspension culture under nano cobalt particles elicitation. For this purpose, nano cobalt particles were used in 0.25, 2.5, and 5 mg L-1 concentrations and samples were collected after 8, 24, 48, and 72 h. The highest artemisinin …

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Random Amplified Polymorphic Dna As A Method To Screen Metal-Tolerant Barley (Hordeum Vulgare L.) Genotypes, Süleyman Cenkci̇, Nevra Doğan Jan 2015

Random Amplified Polymorphic Dna As A Method To Screen Metal-Tolerant Barley (Hordeum Vulgare L.) Genotypes, Süleyman Cenkci̇, Nevra Doğan

Turkish Journal of Botany

Differentially responding genotypes are comparatively used to understand mechanisms of metal tolerance in higher plants. The feasibility of the random amplified polymorphic DNA (RAPD) technique was evaluated to screen for metal tolerance within plants as an alternative to physiological growth parameters. Eight hydroponically grown barley (Hordeum vulgare L.) genotypes were exposed to different concentrations (75, 150, and 225 μM) of cadmium and copper for 7 days and subsequently harvested for determining metal tolerance indices by comparing dry biomass to genomic template stabilities based on their RAPD profiles. Dose- and genotype-dependent reductions in dry weights of shoot and root tissues were …

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Taxonomic And Nomenclatural Contributions To Pyrus L. (Rosaceae) From Turkey, Zübeyde Uğurlu Aydin, Ali̇ Aslan Dönmez Jan 2015

Taxonomic And Nomenclatural Contributions To Pyrus L. (Rosaceae) From Turkey, Zübeyde Uğurlu Aydin, Ali̇ Aslan Dönmez

Turkish Journal of Botany

This paper presents a taxonomic contribution to the genus Pyrus L. P. Georgica and P. Pseudosyriaca are reported from Turkey for the first time. The status of P. Pseudosyriaca is discussed and it is treated as a new variety of Pyrus syriaca. Notes on the chorology, morphological descriptions, figures, and taxonomy are provided. Moreover, P. Serikensis and P. Boissieriana are reduced to synonyms of P. Cordata. An endemic subspecies, P. Elaeagrifolia subsp. Kotschyana, is compared with the related species P. Elaeagrifolia and it is reassessed at the species level based on morphology and distribution. With these changes, Pyrus is represented …

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Generating Salt-Tolerant Nicotiana Tabacum And Identification Of Stress-Responsive Mirnas In Transgenics, Ferhunde Aysi̇n, Ayşe Eli̇f Erson Bensan, Füsun Eyi̇doğan, Hüseyi̇n Avni̇ Öktem Jan 2015

Generating Salt-Tolerant Nicotiana Tabacum And Identification Of Stress-Responsive Mirnas In Transgenics, Ferhunde Aysi̇n, Ayşe Eli̇f Erson Bensan, Füsun Eyi̇doğan, Hüseyi̇n Avni̇ Öktem

Turkish Journal of Botany

Identification of vacuolar Na+/H+ antiporters facilitates the basis of salt stress tolerance mechanisms. Na+ accumulation into the vacuole is crucial for the avoidance of cytoplasmic Na+ toxicity. In this study, we show that the introduction of AtNHX1 into tobacco generated more tolerant plants when compared to wild-type plants. Transgenic tobacco plants exhibited higher germination rates in the presence of increasing salt concentrations compared to wild-type plants. In addition, proline levels were higher under salt stress conditions in both the shoots and the roots of transgenics compared to wild-type plants. Increase in malondialdehyde production during lipid peroxidation by salinity was lower …

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Karyotype Analysis In Allium Roseum L. (Alliaceae) Using Fluorescent In Situ Hybridization Of Rdna Sites And Conventional Stainings, Arbi Guetat, Marcella Rosato, Josep A. Rosselló, Mohamed Boussaid Jan 2015

Karyotype Analysis In Allium Roseum L. (Alliaceae) Using Fluorescent In Situ Hybridization Of Rdna Sites And Conventional Stainings, Arbi Guetat, Marcella Rosato, Josep A. Rosselló, Mohamed Boussaid

Turkish Journal of Botany

In North Africa, Allium roseum L. Has been treated as a polymorphic species comprising 12 different taxa. More than 80 individuals in the Allium roseum complex were sampled from 20 populations at different localities in Tunisia and investigated karyologically. Basic chromosome number was confirmed as x = 8. Three cytotypes, diploid (2n = 2x = 16), triploid (2n = 3x = 24), and tetraploid (2n = 4x = 32), were found. Polyploidy was recorded for the first time for this species in Tunisia. Most of the populations were diploid (17 populations), whereas two populations were tetraploid and only one was …

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Activated Expression Of Eshd1 Enhances Drought Tolerance In Tobacco Plants Via Mitigation Of Reactive Oxygen Species-Mediated Membrane Damage, Cheng Zhou, Zhongyou Ma, Lin Zhu, Jiansheng Guo, Xianghuan Cui, Jian Zhu, Jianfei Wang Jan 2015

Activated Expression Of Eshd1 Enhances Drought Tolerance In Tobacco Plants Via Mitigation Of Reactive Oxygen Species-Mediated Membrane Damage, Cheng Zhou, Zhongyou Ma, Lin Zhu, Jiansheng Guo, Xianghuan Cui, Jian Zhu, Jianfei Wang

Turkish Journal of Botany

It is well documented that the homeodomain-leucine zipper (HD-Zip) transcription factors play diverse roles during plant growth and development. The Class I HD-Zip genes are shown to be involved in the regulation of abiotic stress responses and tolerance. Herein, a novel Class I HD-Zip gene, EsHD1, was isolated from Eutrema salsugineum, and an investigation was performed of its physiological functions in response to drought stress. The analyses of gene expression profiles revealed that the EsHD1 transcripts quickly accumulated upon exposure to various abiotic stress conditions or abscisic acid treatments. Furthermore, the overexpression of EsHD1 in tobacco plants conferred improved tolerance …

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Field Assessment Of Camsrb2 Transgenic Lines In A Drought Stress Environment, Zamin Shaheed Siddiqui, Jung Il Cho, Dan-Be Park, Gang-Seob Lee, Tae-Hun Ryu, Huda Shahid, Muhammad Umar, Soo-Chul Park Jan 2015

Field Assessment Of Camsrb2 Transgenic Lines In A Drought Stress Environment, Zamin Shaheed Siddiqui, Jung Il Cho, Dan-Be Park, Gang-Seob Lee, Tae-Hun Ryu, Huda Shahid, Muhammad Umar, Soo-Chul Park

Turkish Journal of Botany

Two drought-tolerant transgenic rice lines, L-8 (single copy) and L-23 (two copy), expressing the Capsicum annuum methionine sulfoxide reductase B2 (CaMsrB2) gene were selected for stress tolerance phenotyping under drought stress conditions. The two transgenic lines were selected on the basis of laboratory experiments and for performing well against drought. Field assessment of CaMsrB2 transgenic lines L-23 and L-8 in a drought stress environment was conducted. For the assessments, small plots were prepared at the Department of Botany of the University of Karachi to test the physiological response of transgenic lines. Relative water content, quantum yield (Fv/Fm ratio), photochemical quenching …

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Characterizing The Expression Of Genes Involved In Iron Transport Inpakistani Peanut Varieties Under Iron Deficiency Stress, Shamim Akhtar, Yusuke Kakei, Khurrum Bashir, Armghan Shahzad, Takashi Yamakawa, Muhammad Arshad, Fayyaz- Ul-Hassan, Hiromi Nakanishi, Naoko K. Nishizawa Jan 2015

Characterizing The Expression Of Genes Involved In Iron Transport Inpakistani Peanut Varieties Under Iron Deficiency Stress, Shamim Akhtar, Yusuke Kakei, Khurrum Bashir, Armghan Shahzad, Takashi Yamakawa, Muhammad Arshad, Fayyaz- Ul-Hassan, Hiromi Nakanishi, Naoko K. Nishizawa

Turkish Journal of Botany

Iron (Fe) deficiency is one of the major yield-limiting factors in peanut (Arachis hypogaea L.), especially when grown in calcareous soils. The soils of the Pothwar region in Pakistan are calcareous in nature, exposing peanut to Fe deficiency. The molecular mechanisms governing Fe deficiency response in peanut have not been fully revealed. We compared 4 locally important varieties of peanut to evaluate Fe deficiency responses at the molecular level. The expression profiles of 7 important genes including AhIRT1, AhFRO1, AhNRAMP1, AhYSL1, AhYSL3.1, AhYSL4, and AhYSL6 in roots and young and old leaves of local peanut varieties were investigated 19 days …

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Latitudinal Gradient Facilitates Adaptive Population Differentiation Of Campanulastrum Americanum (American Bellflower), Marisa L. Naciuk Jan 2015

Latitudinal Gradient Facilitates Adaptive Population Differentiation Of Campanulastrum Americanum (American Bellflower), Marisa L. Naciuk

Theses and Dissertations

Local adaptation is characterized by higher reproductive fitness by individuals present in their native habitats relative to nonlocals. This study utilized Campanulastrum americanum as a model for assessing whether an environmental gradient can facilitate local adaptation. In particular, I determined if a latitudinal gradient across eastern United States has influenced the phenology and reproductive fitness of five northern and four southern C, americanum populations. These populations were reciprocally transplanted into two common garden sites positioned in the most northern and southern extent of the species distribution: Hastings, MI and Columbus, GA. I observed adaptive population differentiation of northern and southern …

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Bumpers College Students In Action, Discovery Editors Jan 2015

Bumpers College Students In Action, Discovery Editors

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

No abstract provided.

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Bacterial Auxin Signaling: Comparative Study Of Growth Induction In Arabidopsis Thaliana And Triticum Aestivum, Basharat Ali Jan 2015

Bacterial Auxin Signaling: Comparative Study Of Growth Induction In Arabidopsis Thaliana And Triticum Aestivum, Basharat Ali

Turkish Journal of Botany

Auxin-producing rhizobacteria were evaluated for the role of their auxin signaling in enhancing the growth of Arabidopsis thaliana (L.) Heynh. and Triticum aestivum L. Arabidopsis thaliana wild type Columbia (Col-0) in comparison with phytohormone mutant lines aux1-7 (insensitive to auxin and ethylene), axr4-1 (insensitive to auxin), and eir1-1 (insensitive to ethylene) was used as a model system. Bacterization of wild type Col-0 recorded significant increases in shoot length (38%) and number of siliqua (180%) with Bacillus subtilis TpP-1 over the controls. Inoculation with aux1-7 and axr4-1 showed statistically comparable results for growth parameters as compared to their respective controls. Treatment …

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Letter From The Dean, Michael Vayda Jan 2015

Letter From The Dean, Michael Vayda

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

No abstract provided.

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Typifications In Andersonia (Ericaceae: Epacridoideae), Kristina L. Lemson Jan 2015

Typifications In Andersonia (Ericaceae: Epacridoideae), Kristina L. Lemson

Research outputs 2014 to 2021

Lectotypes are selected for Andersonia R.Br (Ericaceae) and eight taxa within the genus: A. aristata Lindl. A. brevifolia Sond., A. heterophylla Sond., A. involucrata Sond., A. sprengelioides R.Br., A. lehmanniana subsp. lehmanniana (Sond.)L.Watson and A. lehmanniana subsp. pubescens (Sond.)L.Watson. Andersonia patens Sond. is lectotypified in synonymy with A. sprengelioides.

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Cytogenetic Studies On Some Scorzonera L. S.L. (Asteraceae) Taxa From Turkey, Fahi̇m Altinordu, Esra Marti̇n, Serdar Makbul, Kami̇l Çoşkunçelebi̇, Mutlu Gültepe Jan 2015

Cytogenetic Studies On Some Scorzonera L. S.L. (Asteraceae) Taxa From Turkey, Fahi̇m Altinordu, Esra Marti̇n, Serdar Makbul, Kami̇l Çoşkunçelebi̇, Mutlu Gültepe

Turkish Journal of Botany

In the present study, chromosome morphology of 32 Scorzonera L. Taxa, including 19 species endemic to Turkey, was analyzed. The plant materials were collected from different natural populations of Turkey between 2005 and 2011. The classification of chromosomes, the length of the long and short arm, haploid chromosome length, arm ratio, and relative chromosomal length were measured by software image analyses. The basic chromosome numbers were determined as x = 6 and x = 7. Two types of ploidy levels were observed as diploidy and tetraploidy. Karyotype asymmetry indices, TF%, As K%, Syi, Rec, A, A1, and A2 were also …

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Fall Seed Guide 2015, Teshome Regassa, P. Stephen Baenziger, Stephen N. Wegulo, Greg Kruger, Dipak K. Santra Jan 2015

Fall Seed Guide 2015, Teshome Regassa, P. Stephen Baenziger, Stephen N. Wegulo, Greg Kruger, Dipak K. Santra

Department of Agronomy and Horticulture: Faculty Publications

Crops included in this guide are winter wheat, winter barley, and triticale. You may receive this guide in the mail or through the University of Nebraska Extension network. The data and other information this guide is can be found at our web site: http://cropwatch.unl.edu/varietytest/ and http://www.unl.edu/ncia. Additional information is available at the wheat variety virtual tour web site http://cropwatch.unl.edu/wheat/virtual or the winter wheat variety selection tool page http:// citnews.unl.edu/winter_wheat_tool/index.shtml. The last season was hard on Nebraska winter wheat. Emergence was poor in the west due to dry conditions. On the other hand, some plots in the east had to be …

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Model And Sensor-Based Recommendation Approaches For In-Season Nitrogen Management In Corn, L. J. Thompson, R. B. Ferguson, N. Kitchen, D. W. Frazen, M. Mamo, H. Yang, J. S. Schepers Jan 2015

Model And Sensor-Based Recommendation Approaches For In-Season Nitrogen Management In Corn, L. J. Thompson, R. B. Ferguson, N. Kitchen, D. W. Frazen, M. Mamo, H. Yang, J. S. Schepers

Department of Agronomy and Horticulture: Faculty Publications

Nitrogen management for corn (Zea mays L.) may be improved by applying a portion of N in-season. This investigation was conducted to evaluate crop modeling (Maize-N) and active crop canopy sensing approaches for recommending in-season N fertilizer rates. These approaches were evaluated during 2012–2013 on 11 field sites, in Missouri, Nebraska, and North Dakota. Nitrogen management also included a no-N treatment (check) and a non-limiting N reference (all at planting). Nitrogen management treatments were assessed for two hybrids and at low and high seeding rates, arranged in a randomized complete block design. In 9 of 11 site-years, the sensor-based …

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Native Orchids In Winter?, W. John Hayden Jan 2015

Native Orchids In Winter?, W. John Hayden

Biology Faculty Publications

A very special place in Southwest Virginia will soon expand its borders, thanks in part to the annual fundraising appeal by the Virginia Native Plant Society. The Cedars Natural Area Preserve supports ex ceptional natural communities including rocky, dry limestone glades and woodlands located across nearly 20 square miles in Lee County near the Powell River. The karst landscape, where thin soils develop over easily dissolved limestone bedrock, creates terrain that tends to be rolling, rocky, rugged, and full of sinkholes, caves, and sinking streams. The preserve is a haven for rare plants that have adapted to the mostly thin, …

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Biosystematics Of Monochoria C. Presl (Pontederiaceae) In Thailand, Duangjai Tungmunnithum Jan 2015

Biosystematics Of Monochoria C. Presl (Pontederiaceae) In Thailand, Duangjai Tungmunnithum

Chulalongkorn University Theses and Dissertations (Chula ETD)

Monochoria C. Presl, an extreme morphological variable genus, belongs to an aquatic plant family, Pontederiaceae. According to the Flora of Thailand, there are 3 monotypic species, i.e. M. elata Ridl., M. hastata (L.) Solms and M. vaginalis (Burm.f.) C. Presl ex Kunth. Previously, their morphological plasticity led to ambiguous identification and classification of the species members. This research was designed to clarify taxonomic status and species boundary of the genus. Morphological, phenetic, anatomical, palynological, chromosome and phylogenetic studies were carried out on 25 Monochoria’s populations The morphological study showed high morphological variations among the studied populations. The variation in leaf …

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Weed Women, All Night Vigils, And The Secret Life Of Plants: Negotiated Epistemologies Of Ethnogynecological Plant Knowledge In American History, Claudia Jeanne Ford Jan 2015

Weed Women, All Night Vigils, And The Secret Life Of Plants: Negotiated Epistemologies Of Ethnogynecological Plant Knowledge In American History, Claudia Jeanne Ford

Antioch University Dissertations & Theses

This dissertation critiques the discourse of traditional ecological knowledge described as embedded in indigenous peoples' longevity in location, for the purpose of understanding the embodiment of ecological knowledge in culture. The aim of this research is to examine the historical and epistemic complexity of traditional ecological knowledge that may be both established from the length of time people reside in a specific ecosystem and constitutive of negotiations between and among different cultures. I choose the specific case of the negotiation of plant knowledge for women's reproductive health among Native, African, and European groups as those negotiations unfolded on the American …

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Physiological Variation Of Garry Oak (Quercus Garryana) Seedlings To Drought Stress, Matthew A. Merz Jan 2015

Physiological Variation Of Garry Oak (Quercus Garryana) Seedlings To Drought Stress, Matthew A. Merz

All Master's Theses

The purpose of this study was to determine physiological differences in drought response among Garry oak (Quercus garryana Douglas ex Hook. [Fagaceae]) seedlings that grow in distinct populations in Washington state, in order to aid in restoration efforts by informing growers of the potential differences between the acorn collection sites. Acorns from six Washington populations east of the Cascades, as well as one population from Whidbey Island, were collected and grown in containers under controlled conditions. The plants were assessed with and without moderate and severe drought stress induced by withholding water. The most extreme differences in photosynthetic characteristics …

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Arkansas Cotton Variety Test 2014, Fred Bourland, A. Beach, C. Kennedy, L. Martin, A. Rouse, B. Robertson Jan 2015

Arkansas Cotton Variety Test 2014, Fred Bourland, A. Beach, C. Kennedy, L. Martin, A. Rouse, B. Robertson

Arkansas Agricultural Experiment Station Research Series

The primary goal of the Arkansas Cotton Variety Test is to provide unbiased data regarding the agronomic performance of cotton varieties and advanced breeding lines in the major cotton-growing areas of Arkansas. This information helps seed companies establish marketing strategies and assists producers in choosing varieties to plant.

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Responses To Cadmium Stress In Two Tomato Genotypes Differing In Heavy Metal Accumulation, Shouping Zhao, Yongzhi Zhang, Xuezhu Ye, Qi Zhang, Wendan Xiao Jan 2015

Responses To Cadmium Stress In Two Tomato Genotypes Differing In Heavy Metal Accumulation, Shouping Zhao, Yongzhi Zhang, Xuezhu Ye, Qi Zhang, Wendan Xiao

Turkish Journal of Botany

Our previous research defined two tomato (Solanum lycopersicum) genotypes: high cadmium (Cd) accumulator YSL189 and low Cd accumulator HZ903. Further hydroponics experiments investigated the different tolerance mechanisms to Cd stress between YSL189 and HZ903 at the seedling stage. When Cd concentration was >20 µM in the growing medium, the uptake rate of Cd was significantly higher in roots of YSL189 than it was in roots of HZ903. When plants were supplied with 50 and 100 µM Cd in the growing medium, there were higher Cd concentration, higher biomass and plant height, shorter roots, and higher expression levels of transporter genes …

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