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Articles 3361 - 3390 of 10753

Full-Text Articles in Botany

Additions To The Turkish Discomycetes, Yusuf Uzun, İsmai̇l Acar, Mustafa Emre Akçay, Ilgaz Akata Jan 2014

Additions To The Turkish Discomycetes, Yusuf Uzun, İsmai̇l Acar, Mustafa Emre Akçay, Ilgaz Akata

Turkish Journal of Botany

In this study, Mollisia ventosa P.Karst., Hymenoscyphus herbarum (Pers.) Dennis, H. immutabilis (Fuckel) Dennis, H. robustior (P.Karst.) Dennis, Ciboria amentacea (Balb.) Fuckel, and Peziza fimeti (Fuckel) E.C.Hansen have been recorded in Turkey for the first time. Comments on their morphological and anatomical features, geographical position, locality, collection date, and distribution and short descriptions and photographs related to macro- and micromorphologies of the taxa are provided.

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An Alternative Approach In Sectioning Of Archaeological Woods: The Case Of Quercus Pontica, Bedri̇ Serdar, Reha Mazlum Jan 2014

An Alternative Approach In Sectioning Of Archaeological Woods: The Case Of Quercus Pontica, Bedri̇ Serdar, Reha Mazlum

Turkish Journal of Botany

An alternative approach to the sectioning of archaeological woods is presented in this paper. The samples that we study were obtained through the excavations carried out in Yenikapı (Marmaray), İstanbul. Neolithic-aged wood samples were studied and identified using the frozen sliding microtome method. This method was utilized for the cross-sectioning of a leaf in 1984 for the first time. This work extends its usage by exploiting the method for the purpose of sectioning Neolithic-aged wood samples and providing a case of Quercus pontica C.Koch.

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Molecular Phylogeny Of Astragalus Section Anthylloidei (Fabaceae) Inferred From Nrdna Its And Plastid Rpl32-Trnl (Uag) Sequence Data, Kosar Naderi Safar, Shahrokh Kazempour Osaloo, Ali Asghar Maassoumi, Shahin Zarre Jan 2014

Molecular Phylogeny Of Astragalus Section Anthylloidei (Fabaceae) Inferred From Nrdna Its And Plastid Rpl32-Trnl (Uag) Sequence Data, Kosar Naderi Safar, Shahrokh Kazempour Osaloo, Ali Asghar Maassoumi, Shahin Zarre

Turkish Journal of Botany

The phylogeny of Astragalus L. section Anthylloidei DC. and its interrelationship with allies were examined. The study was conducted using nrDNA ITS and plastid rpl32-trnL_{(UAG)} sequences. Astragalus sect. Anthylloidei is nonmonophyletic, and its members are scattered across the tree in 4 well-supported clades and intermixed with members of other spiny sections. All the multispecific informal groups of the section, with the exception of A. murinus Boiss. group, are not monophyletic. Morphological character evolution was mapped on the molecular tree. Our results suggest that morphology cannot elucidate infrageneric relationships in spiny Astragalus accurately; analyzed characters have evolved several times in sect. …

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Caryopsis Micromorphological Survey Of The Genus Themeda (Poaceae) And Allied Spathaceous Genera In The Andropogoneae, Yu Zhang, Xiaoying Hu, Yunxiao Liu, Qing Liu Jan 2014

Caryopsis Micromorphological Survey Of The Genus Themeda (Poaceae) And Allied Spathaceous Genera In The Andropogoneae, Yu Zhang, Xiaoying Hu, Yunxiao Liu, Qing Liu

Turkish Journal of Botany

A caryopsis micromorphological survey of 15 species of the genus Themeda Forssk. (Poaceae) and 4 species of allied spathaceous genera in tribe Andropogoneae allowed the recognition of 2 types of caryopses based on the ventral face and embryo shape for the first time. One kind of caryopsis had a concave ventral face with a grooved embryo, and the other kind of caryopsis had a flat ventral face with a keel-shaped embryo. Although the ventral face and embryo shapes had limited taxonomic value at the infrageneric level, the caryopsis shapes, embryo proportion, and sculpturing patterns were found to be valuable taxonomic …

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Census, Reproductive Biology, And Germination Of Astragalus Gines-Lopezii (Fabaceae), A Narrow And Endangered Endemic Species Of Sw Spain, Vanesa Martínez-Fernández, Felipe Martinez-Garcia, Felix Perez Garcia Jan 2014

Census, Reproductive Biology, And Germination Of Astragalus Gines-Lopezii (Fabaceae), A Narrow And Endangered Endemic Species Of Sw Spain, Vanesa Martínez-Fernández, Felipe Martinez-Garcia, Felix Perez Garcia

Turkish Journal of Botany

Astragalus gines-lopezii Talavera, Podlech, Devesa & F.M.Vázquez (Fabaceae) is a threatened endemic species with a distribution restricted to a very small area in Badajoz Province (Extremadura Region, SW Spain) and only 2 populations are known. This species was catalogued in the \"Endangered\" category in the 2008 Red List and the 2010 Threatened Spanish Vascular Flora List. Despite its status as an endangered species, at present very little is known about the distribution, census, and reproductive biology of this species. In this study we have carried out an exhaustive census of A. gines-lopezii, and we have evaluated the production of flowers, …

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Molecular Cloning And Characterization In Eukaryotic Expression Systems Of A Sugarcane Cysteine Protease Inhibitor Gene Involved In Drought Tolerance, Nisachon Jangpromma, Akira Saito, Tomohiro Araki, Prasit Jaisil, Patcharin Songsri, Sakda Daduang, Yuya Kawaguchi, Apisak Dhiravisit, Sompong Thammasirirak Jan 2014

Molecular Cloning And Characterization In Eukaryotic Expression Systems Of A Sugarcane Cysteine Protease Inhibitor Gene Involved In Drought Tolerance, Nisachon Jangpromma, Akira Saito, Tomohiro Araki, Prasit Jaisil, Patcharin Songsri, Sakda Daduang, Yuya Kawaguchi, Apisak Dhiravisit, Sompong Thammasirirak

Turkish Journal of Botany

Cystatin responses in sugarcane plants under drought stress have not previously been reported. To test the hypothesis that sugar cane cystatin can function as an osmotic stress tolerance gene, transgenic Pichia pastoris (GS115) and Saccharomyces cerevisiae (A2279) strains with the ability to express sugarcane cystatin were constructed. The osmotic stress tolerance of the transgenic yeasts was then evaluated, and it was found that the transgenic Pichia pastoris (GS115) and Saccharomyces cerevisiae (A2279) had increased growth and increased osmotic stress tolerance. To gain a greater understanding of the responses of sugarcane cystatin to drought, 1 drought-susceptible and 3 drought-tolerant sugarcane cultivars …

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In Vitro Protocorm Development And Mass Multiplication Of An Endangered Orchid, Dactylorhiza Hatagirea, Ashish Rambhau Warghat, Prabodh Kumar Bajpai, Ravi Bihari Srivastava, Om Prakash Chaurasia, Rajinder Singh Chauhan, Hemant Sood Jan 2014

In Vitro Protocorm Development And Mass Multiplication Of An Endangered Orchid, Dactylorhiza Hatagirea, Ashish Rambhau Warghat, Prabodh Kumar Bajpai, Ravi Bihari Srivastava, Om Prakash Chaurasia, Rajinder Singh Chauhan, Hemant Sood

Turkish Journal of Botany

Immature seeds were cultured on 10 different media for germination. Maximum germination was achieved on Lindeman orchid medium (37.12%) within 17 days of culturing. Protocorms with leaf primordia were cultured on BM-2 and 7 different modifications of Murashige and Skoog (MS) medium with various hormone combinations [0-3 mg/L indole butyric acid (IBA) and 0-3 mg/L kinetin (Kin)] for plantlet regeneration and mass multiplication. Maximum number of shoots (18.12 ± 0.3), highest shoot length (17.80 cm ± 2.16), maximum root number (8.25 ± 0.69), and highest root length (8.02 cm ± 1.45) were found on MS medium with 3 mg/L IBA …

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Orthotrichum Pamiricum (Bryophyta), A New Epiphytic Moss Species From Pamir Mountains In Central Asia, Vitezslav Plasek, Jakub Sawicki, Lukas Cihal Jan 2014

Orthotrichum Pamiricum (Bryophyta), A New Epiphytic Moss Species From Pamir Mountains In Central Asia, Vitezslav Plasek, Jakub Sawicki, Lukas Cihal

Turkish Journal of Botany

Orthotrichum pamiricum Plasek & Sawicki is described as a new species from the western foothills of the Pamir Mountains of the Tajik-Afghan border in Central Asia. It is placed in Orthotrichum Hedw. subg. Pulchella (Schimp.) Vitt. The species is characterized by obtuse leaf apices, cryptoporous stomata, an exostome composed of 8 pairs of the teeth that are recurved when dry, and an endostome with 16 thin and incurved segments. Molecular data indicating the phylogenetic placement of O. pamiricum are also presented.

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Planktothrix Rubescens: A Perennial Presence And Toxicity In Lake Sapanca, Reyhan Akçaalan Albay, Lati̇fe Köker, Cenk Gürevi̇n, Meri̇ç Albay Jan 2014

Planktothrix Rubescens: A Perennial Presence And Toxicity In Lake Sapanca, Reyhan Akçaalan Albay, Lati̇fe Köker, Cenk Gürevi̇n, Meri̇ç Albay

Turkish Journal of Botany

Cyanobacteria are expected to adjust to new conditions better than other primary producers since they have a long history of adaptation as one of the first organisms on earth. Their ecophysiological adaptations differ widely among cyanobacterial species. As a stratified species, P. rubescens forms a population in the metalimnion during summer months in lakes with clear water and disperses in the whole water column during the period. However, after a dry season in 2006 and 2007, a prolonged surface bloom in late winter was observed in Lake Sapanca The maximum biomass of P. rubescens reached 13.9 mg L^{-1} in surface …

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Some Factors Affecting The Abundance Of Phytoplankton In An Unproductive Alkaline Lake (Lake Hazar, Turkey), Mehmet Ali̇ Turan Koçer, Bülent Şen Jan 2014

Some Factors Affecting The Abundance Of Phytoplankton In An Unproductive Alkaline Lake (Lake Hazar, Turkey), Mehmet Ali̇ Turan Koçer, Bülent Şen

Turkish Journal of Botany

This study aimed to explain the seasonal and vertical distribution of phytoplankton in the pelagic zone of a deep alkaline lake that is characterized by low phytoplankton abundance. Phytoplankton and water samples were collected seasonally from 9 points and 7 depths between the surface and 20 m from December 2004 to September 2005. Planktolyngbya contorta was the dominant or subdominant species in all seasons and depths. The dominance of Gomphonema species was observed in December, but they were subdominant in September. Cyclotella meneghiniana was dominant at 20 m and subdominant in the upper depths during March, June, and September. Melosira …

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Molecular Variability Of Plantain Ecotypes From The Genus Musa (Musaceae), Rakeshkumar Choudhary, Raghunath Keshavachandran, Rema Menon, Ganesh Khalekar, Nirbhay Singh, Divya Maruthiyottu Jan 2014

Molecular Variability Of Plantain Ecotypes From The Genus Musa (Musaceae), Rakeshkumar Choudhary, Raghunath Keshavachandran, Rema Menon, Ganesh Khalekar, Nirbhay Singh, Divya Maruthiyottu

Turkish Journal of Botany

Twelve plantain ecotypes were characterized for molecular variability using random amplified polymorphic DNA (RAPD) and inter simple sequence repeat (ISSR) markers. Out of the 60 RAPD and 40 ISSR primers tested, 16 RAPD and 14 ISSR primers were found polymorphic, and were used for molecular profiling of the plantain ecotypes. The average number of bands per primer, average number of polymorphic bands per primer, mean polymorphic information content (PIC) value, resolving power (Rp), and marker indices (MI) for RAPD primers were 8.63, 3.25, 0.87, 15.49, and 2.86, whereas the respective values for the ISSR assay were 7.93, 4.14, 0.85, 12.49, …

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The Assessment Of Genetic Diversity Of Castanea Species By Rapd, Aflp, Issr, And Ssr Markers, Sofiane Abdelhamid, Cong-Linh Lê, Marco Conedera, Philippe Küpfer Jan 2014

The Assessment Of Genetic Diversity Of Castanea Species By Rapd, Aflp, Issr, And Ssr Markers, Sofiane Abdelhamid, Cong-Linh Lê, Marco Conedera, Philippe Küpfer

Turkish Journal of Botany

Castanea Mill. (chestnut) is a multipurpose deciduous tree and member of the family Fagaceae, widely distributed throughout North America, Europe, and Asia. The evaluation of the genetic diversity of chestnut species is crucial for the effective conservation of this economically and ecologically valuable tree. In this study, we applied 4 DNA markers to detect the genetic variability among and within Castanea species and to compare the effectiveness of each system in estimating genetic variation. We amplified 106 random amplified polymorphic DNA (RAPD), 228 amplified fragment length polymorphism (AFLP), 42 intersimple sequence repeat (ISSR), and 36 simple sequence repeat (SSR) polymorphic …

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Phytolith Analysis Of Poa Pratensis (Poaceae) Leaves, Zsuzsa Lisztes_Szabo, Szilvia Kovács, Ákos Petö Jan 2014

Phytolith Analysis Of Poa Pratensis (Poaceae) Leaves, Zsuzsa Lisztes_Szabo, Szilvia Kovács, Ákos Petö

Turkish Journal of Botany

Phytoliths in Poa pratensis L. (Poaceae) leaf blades and sheaths are described in this study. The role of plant opal particles-known as phytoliths-is considerable in taxonomical studies, and their long-term preservation in sediments makes them a useful tool in the reconstruction of ancient plant communities and plant-human interactions. All together, 2244 phytoliths were counted and analyzed in 25 plant samples (5 shoots of 5 specimens and approximately 500-600 phytoliths per specimen). The biogenic silica content of P. pratensis leaves was determined at 2.61%, and 27 morphotypes have been described using the International Code for Phytolith Nomenclature. Two morphotypes are described …

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Exogenous Proline And Proline-Enriched Lolium Perenne Leaf Extract Protects Against Phytotoxic Effects Of Nickel And Salinity In Pisum Sativum By Altering Polyamine Metabolism In Leaves, Muhammad Adnan Shahid, Rashad Mukhtar Balal, Muhammad Aslam Pervez, Tahira Abbas, Muhammad Anjum Aqeel, Muhammad Mansoor Javaid, Francisco Garcia-Sanchez Jan 2014

Exogenous Proline And Proline-Enriched Lolium Perenne Leaf Extract Protects Against Phytotoxic Effects Of Nickel And Salinity In Pisum Sativum By Altering Polyamine Metabolism In Leaves, Muhammad Adnan Shahid, Rashad Mukhtar Balal, Muhammad Aslam Pervez, Tahira Abbas, Muhammad Anjum Aqeel, Muhammad Mansoor Javaid, Francisco Garcia-Sanchez

Turkish Journal of Botany

Pea plants (Pisum sativum L.) were exposed to NaCl and/or NiCl_2 stress to investigate whether pure proline and Lolium perenne L. (LP) leaf extract could efficaciously protect against the phytotoxicity generated by nickel and/or salinity stress in pea. Both stress factors (salinity and nickel) significantly inhibited growth, total chlorophyll content, photosynthetic activity, stomatal conductance, intercellular CO_2 level, relative water content (RWC), and membrane stability index (MSI). However, superoxide, hydrogen peroxide, proline, glycine betaine, total free amino acids, total soluble sugars, total phenolic compounds, tocopherol contents, lipid peroxidation, and electrolyte leakage were significantly increased. Similarly, free, soluble-conjugated, and insoluble-bound polyamine contents …

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A Taxonomic Revision Of The Genus Cephalaria (Caprifoliaceae) In Turkey, Ramazan Süleyman Göktürk, Hüseyi̇n Sümbül Jan 2014

A Taxonomic Revision Of The Genus Cephalaria (Caprifoliaceae) In Turkey, Ramazan Süleyman Göktürk, Hüseyi̇n Sümbül

Turkish Journal of Botany

The morphological features of Cephalaria Schrad. ex Roem. & Schult. were studied based on our specimens collected between 1994 and 2010 in Turkey and herbarium specimens from various herbaria. In the present study, typifications, a list of synonyms, descriptions, ecology, phytogeographical regions, conservation status, and distribution of all studied taxa are given. Taxonomic relationships between similar species are discussed. Illustrations of habit, flower, calyx, involucel, and involucral and receptacular bracts of some species are given. Colour images of some species are also provided. Additional new characters were determined that were not previously given in descriptions of Cephalaria species in the …

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Reseda Malatyana (Resedaceae), A New Chasmophytic Species From Eastern Anatolia, Turkey, Hasan Yildirim, Serdar Gökhan Şenol Jan 2014

Reseda Malatyana (Resedaceae), A New Chasmophytic Species From Eastern Anatolia, Turkey, Hasan Yildirim, Serdar Gökhan Şenol

Turkish Journal of Botany

Reseda malatyana Yıldırım & Şenol (Resedaceae) is illustrated and described as a new species to science, endemic to eastern Anatolia, Turkey. Reseda malatyana is related to Reseda armena Boiss. It differs from Reseda armena by the following characters: densely smaller, unbranched at the upper part, papillate-hispidulous stems; dark green, thicker, and densely papillate-hispidulous leaves; bigger petals; smaller pedicels; relatively smaller with sinus seeds; oblate-spheroidal, tricolporate, and rugulate pollen grains. R. malatyana is a perennial species that colonizes on marlstone rocky cliffs, known from a single locality in Levent Canyon, located in Malatya Province. It is an obligated chasmophytic species. In …

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Dreb1a From Oryza Sativa Var. Ir6: Homology Modelling And Molecular Docking, Muhammad Nawaz, Naeem Iqbal, Sobia Idrees, Ihsan Ullah Jan 2014

Dreb1a From Oryza Sativa Var. Ir6: Homology Modelling And Molecular Docking, Muhammad Nawaz, Naeem Iqbal, Sobia Idrees, Ihsan Ullah

Turkish Journal of Botany

The family of AP2/ERF plant specific transcription factors, including dehydration-responsive element binding (DREB) proteins, has been reported to activate and bind with the dehydration responsive element/C repeat (DRE/CRT) of stress-inducible gene promoters. We amplified DREB1A from Oryza sativa var. IR6 (807 bp) and subjected it to protein homology modelling and phylogenetic analysis. BLAST sequence analysis indicated high similarity (99%) with the O. sativa japonica group. Phylogenetic analysis was carried out with other 12 DREB sequences from cereals/grasses using Clustal Omega. Protein secondary structure and 3D models were determined using SOPMA and MODELLER v9.10, respectively. PROSA was used to determine the …

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Life Cycle Versus Systematic Placement: Phylogenetic And Cytogenetic Studies In Annual Artemisia (Asteraceae, Anthemideae), Jaume Pellicer, Oriane Hidalgo, Teresa Garnatje, Katsuhiko Kondo, Joan Vallès Jan 2014

Life Cycle Versus Systematic Placement: Phylogenetic And Cytogenetic Studies In Annual Artemisia (Asteraceae, Anthemideae), Jaume Pellicer, Oriane Hidalgo, Teresa Garnatje, Katsuhiko Kondo, Joan Vallès

Turkish Journal of Botany

Artemisia L. comprises ca. 20 annual species out of ca. 500, which are distributed mainly across the Old World grades, accounting for multiple independent acquisitions of annual habit throughout the evolutionary history of the genus. This makes Artemisia an interesting subject for the study of plant life cycle evolution in a phylogenetic context and its consequences at genomic level. The main aim of this phylogenetic analysis was to circumscribe 17 of the annual representatives within the major lineages of Artemisia. Genome size has been assessed and ancestral values reconstructed on the tree. Fluorescent in situ hybridisation (FISH) has also been …

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The Molecular Characterization And Expression Analyses Of Ethylene Receptor Genes From Watermelon Fruit, Yaşar Karakurt, Muhammet Tonguç, Hali̇me Ünlü Jan 2014

The Molecular Characterization And Expression Analyses Of Ethylene Receptor Genes From Watermelon Fruit, Yaşar Karakurt, Muhammet Tonguç, Hali̇me Ünlü

Turkish Journal of Botany

Watermelon fruit is very sensitive to ethylene, showing rapid deterioration and water-soaking upon ethylene exposure. The objective of this study was to isolate and determine the expressions of ethylene receptor genes in watermelon fruit. As a result of PCR amplification of cDNAs obtained via RT-PCR of total RNA from watermelon fruit with degenerate primers, 3 partial cDNAs were obtained. After extension of the 3' and 5' ends of the cDNAs via 3' and 5' RACE analysis, 3 full-length genes designated as CL-ETR1, CL-ERS1, and CL-ETR2 were obtained. Upon cloning and sequencing, it was determined that the CL-ETR1, CL-ERS1, and CL-ETR2 …

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Identification And Functional Analysis Of New Conserved Micrornas And Their Targets In Potato (Solanum Tuberosum L.), Muhammad Din, Muhammad Younas Khan Barozai, Iftekhar Ahmed Baloch Jan 2014

Identification And Functional Analysis Of New Conserved Micrornas And Their Targets In Potato (Solanum Tuberosum L.), Muhammad Din, Muhammad Younas Khan Barozai, Iftekhar Ahmed Baloch

Turkish Journal of Botany

MicroRNAs (miRNAs) are tiny, endogenous, nonprotein-coding, and functionally negative regulators of posttranscriptional gene regulation. Potato (Solanum tuberosum L.) is a starchy and tuberous crop that is also important for its potassium and vitamin contents. Though potato is the world's fourth largest food crop, its miRNAs and their targets have not been well studied. Here we report a comparative genomics approach that was applied to explore miRNAs and their targeted proteins in potato. A total of 120 new miRNAs from 110 families were identified and characterized from the expressed sequence tags. All 120 miRNAs were observed, along with stable stem-loop precursor …

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Plastid And Nuclear Genomic Resources Of A Relict And Endangered Plant Species: Chamaedaphne Calyculata (L.) Moench (Ericaceae), Monika Szczecinska, Angelika Gomolinska, Piotr Szkudlarz, Jakub Sawicki Jan 2014

Plastid And Nuclear Genomic Resources Of A Relict And Endangered Plant Species: Chamaedaphne Calyculata (L.) Moench (Ericaceae), Monika Szczecinska, Angelika Gomolinska, Piotr Szkudlarz, Jakub Sawicki

Turkish Journal of Botany

Chamaedaphne calyculata, one of the largest shrubs in the family Ericaceae, is native to boreal zones of the northern hemisphere. The complete nucleotide sequence of the Chamaedaphne plastid genome was determined in the present study. The genome is a circular double-stranded DNA molecule 176,744 bp in length, that includes the typical large single-copy (LSC), small single-copy, and 2 inverted repeats (IR) regions. The C. calyculata plastid genome contains 113 genes, excluding the second IR region. A comparative analysis revealed that the plastid genome organization of the Chamaedaphne plastome is almost identical to that of Vaccinium macrocarpon, the first sequenced chloroplast …

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Reproduction And Diversity Of The Endangered Salix Lapponum L. Populations In Eastern Poland, Magdalena Pogorzelec, Katarzyna Glebocka, Barbara Hawrylak-Nowak, Marzena Parzymies Jan 2014

Reproduction And Diversity Of The Endangered Salix Lapponum L. Populations In Eastern Poland, Magdalena Pogorzelec, Katarzyna Glebocka, Barbara Hawrylak-Nowak, Marzena Parzymies

Turkish Journal of Botany

The main aim of the study was to increase the knowledge on the ecology and biology of the boreal relict Salix lapponum L., an endangered plant in Poland, in order to create an effective protection program. An important aspect was to determine the within- and among-population genetic diversity of the studied species in order to evaluate whether the basic stages of the generative reproduction cycle in the populations were correct. The results confirmed that S. lapponum pollen viability and germinability, for both fresh and stored pollen, were high and so were the seed germination ability and dynamics. All individuals were …

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Analysis Of The Canola Lip Mutant, Matthew Rafferty Jan 2014

Analysis Of The Canola Lip Mutant, Matthew Rafferty

Honors Program Theses

Canola (Brassica napus) is a broadleaf agricultural plant grown mainly in regions of the United States and Canada. Its seeds are used to produce edible oil (canola oil) as well as biofuel. The study of mutagenized wild-type Brassica napus seeds in the CAN-TILL project, (http://www.botany.ubc.ca/can-till/), led to the discovery of a phenotype called Lamina epiphylla (LIP ). The lip mutant is characterized by changes in leaf shape that cause the leaves to look trumpeted, among other variations. This research project compared wild-type Brassica napus leaf development with the lamina epiphylla mutant to assess leaf development and to determine the precise …

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A Preliminary Systematic Analysis Of The Species Of Genus Physaria (Brassicaceae) Of Wyoming, Kayla Rethwisch Jan 2014

A Preliminary Systematic Analysis Of The Species Of Genus Physaria (Brassicaceae) Of Wyoming, Kayla Rethwisch

Honors Program Theses

Physaria is a recent and rapidly evolving genus of plants in the Brassicaceae family. Particularly problematic are the taxa in the “old” Physaria sensu stricto found in Wyoming, characterized by highly inflated, didymous fruits. Due to the plants in this group being of recent origin, the relationships among them are unknown. This study examined several samples from each taxon in a preliminary study of the taxonomy of these species. The resulting phylogenies were analyzed to determine relatedness among the species. By looking at gene regions, sections on the genomic sequence, it is possible to determine how these various plants are …

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Additional Lichen Records And Minerological Data From Metal-Contaminated Sites In Maine, I. D. Medeiros, A. M. Fryday, Nishanta Rajakaruna Jan 2014

Additional Lichen Records And Minerological Data From Metal-Contaminated Sites In Maine, I. D. Medeiros, A. M. Fryday, Nishanta Rajakaruna

Faculty Publications, Biological Sciences

No abstract provided.

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Diversity And Soil-Tissue Elemental Relations Of Vascular Plants Of Callahan Mine, Brooksville, Maine, U.S.A, Margaret Mansfield, Nathaniel Pope, Glen Mittlehauser, Nishanta Rajakaruna Jan 2014

Diversity And Soil-Tissue Elemental Relations Of Vascular Plants Of Callahan Mine, Brooksville, Maine, U.S.A, Margaret Mansfield, Nathaniel Pope, Glen Mittlehauser, Nishanta Rajakaruna

Faculty Publications, Biological Sciences

Metal-contaminated soils provide numerous stressors to plant life, resulting in unique plant communities worldwide. The current study focuses on the vascular plants of Callahan Mine in Brooksville, ME, USA, a Superfund site contaminated with Cu, Zn, Pb, and other pollutants. One hundred and fifty-five taxa belonging to 50 families were identified, with the Asteraceae (21%), Poaceae (11%), and Rosaceae (9%) as the most species-rich families. Ninety-six species encountered at the Mine were native to North America (62%), including 11 taxa (7%) with rarity status in at least one New England state. Fifty-one species were non-native (33%), including nine taxa (6%) …

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A Structure-Function Analysis Of The Arabidopsis Chloroplast Import Protein Attic20, James H. Campbell Jan 2014

A Structure-Function Analysis Of The Arabidopsis Chloroplast Import Protein Attic20, James H. Campbell

Theses and Dissertations (Comprehensive)

Arabidopsis thaliana protein Tic20 (atTic20) is a member of the translocon at the inner envelope membrane of chloroplasts. Evidence to date suggests it is part of the main preprotein conducting aperture in the complex, but its exact role is still debated. To help characterize its role, a protocol optimizing yield and purity of recombinantly expressed atTic20 was developed, and a series of experiments was performed to examine its secondary structure and its ability to interact with chloroplast transit peptides. The attempt to increase protein yield was successful, with growth at 20oC in the auto-inducing media ZYP-5052 showing the …

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Development Of Leaf Shape And Vein Homologies In Five Species Of The Genus Ipomoea (Convolvulaceae), Austin William Jones Jan 2014

Development Of Leaf Shape And Vein Homologies In Five Species Of The Genus Ipomoea (Convolvulaceae), Austin William Jones

Dissertations and Theses @ UNI

Angiosperm leaves are extremely variable in form while predominantly maintaining the function of the primary photosynthetic organ of the plant. Changes in leaf form can result from myriad physiological processes which may be influenced by ecology, physical stimuli, phylogeny, or other factors. In studying the development of divergent leaf forms among closely related species, conserved morphological elements may be identified that are not apparent in the mature form. The genus Ipomoea (Convolvulaceae) contains over 600 species and a wide range in leaf shapes. Five species, I. purpurea, I. coccinea, I. sloteri, I. quamoclit, and I. cairica show a range in …

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The Performance Of Simple Artificial Floating Wetland Communities And Their Effects On Aquatic Nutrient Levels And Algal Abundance, Bradley L. Sleeth Jan 2014

The Performance Of Simple Artificial Floating Wetland Communities And Their Effects On Aquatic Nutrient Levels And Algal Abundance, Bradley L. Sleeth

UNF Graduate Theses and Dissertations

Harmful algal blooms are exponential increases in autotrophic microorganisms that proliferate in such a way that the surrounding environment, the local economy and the health of regional populations are negatively affected. Among the causes of these blooms are anthropogenic inputs of excess nitrogen and phosphorus into the environment through overfertilization. Floating treatment wetlands (FTW) have emerged as a novel method of reducing the negative impacts of these nutrient inputs by using artificial rafts to float normally emergent wetland plants on the surface of water bodies to assimilate excess nutrients. Because their use is so new, only limited research has been …

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Census And Mapping Of Chorro Creek Bog Thistle In Reservoir Canyon, San Luis Obispo, Ca, Tyler Michael Lutz Dec 2013

Census And Mapping Of Chorro Creek Bog Thistle In Reservoir Canyon, San Luis Obispo, Ca, Tyler Michael Lutz

Biological Sciences

Chorro Creek bog thistle (Cirsium fontinale var. obispoense) is a federally endangered variety of Fountain thistle endemic to western San Luis Obispo County. The U.S. Fish and Wildlife Service knows of nineteen populations, many with multiple colonies. A population was discovered in the Reservoir Canyon Natural Reserve in 2001, but has not been monitored or described since the time of its discovery. In fall of 2013, a census of the population was performed, the four colonies were mapped, and a floristic survey was conducted. A field experiment was initiated to determine if reducing the riparian canopy coverage can …

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