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- Turkish Journal of Botany (54)
- Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences (11)
- Inquiry: The University of Arkansas Undergraduate Research Journal (4)
- Kansas Agricultural Experiment Station Research Reports (4)
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Articles 1 - 30 of 79
Full-Text Articles in Life Sciences
News From Cart, Donald Padgett
Keep The License Agreements Coming: The Effects Of J.E.M. Ag Supply, Incorporated V. Pioneer Hi-Bred International, Incorporated On Universities' Use Of Intellectual Property Laws To Protect Their Plant Genetic Research, Timothy P. Daniels
Brigham Young University Education and Law Journal
No abstract provided.
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Propagation Of Thornless Arkansas Blackberries By Hardwood Cuttings, Mark Bray, Curt C. Rom, John R. Clark
Propagation Of Thornless Arkansas Blackberries By Hardwood Cuttings, Mark Bray, Curt C. Rom, John R. Clark
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Effects of auxin application and cutting location on canes on adventitious root development in hardwood cuttings of three Arkansas thornless blackberry cultivars were studied. Dormant canes were collected from one-year-old plants of ‘Apache’, ‘Arapaho’, and ‘Navaho’ and stored in a cold room until February. Two- or three-node cuttings were taken from the canes at apical, mid, and basal locations along the cane and were placed under intermittent mist in a perlite-filled greenhouse bed. Cuttings were either untreated or treated with auxin indole-3-butyric acid (IBA), applied as a liquid quick dip at 0.3%. In general, cutting diameter was greatest for basal …
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 4 2003, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 4 2003, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Chitosanase May Enhance Anti-Fungal Defense Responses In Transgenic Tobacco, Bill L. Hendrix, James Mcd. Stewart
Chitosanase May Enhance Anti-Fungal Defense Responses In Transgenic Tobacco, Bill L. Hendrix, James Mcd. Stewart
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Chitosanase is an enzyme, similar to chitinase, capable of hydrolyzing the β-1,4-linkages between N-acetyl-D-glucosamine and D-glucosamine residues in partially acetylated chitosan polymers found in fungal cell walls. When attacked by pathogenic fungi, many plants exploit this hydrolytic action as a component of a larger post-attack defense response, but these enzymes may also play a role in the initial plant-pathogen interaction via the generation of elicitors resulting from the hydrolysis of fungal cell walls. To gain insight into these mechanisms, a Paenbacillus chitosanase was cloned, sequenced, and modified for plant expression. The modified gene was delivered to tobacco (Nicotiana tabacum L. …
Effect Of Triticum Turgidum Cytoplasm On Test Weight Of Soft Red Winter Wheat, Juan Mayta, Robert Bacon, John Kelly, Edward Gbur
Effect Of Triticum Turgidum Cytoplasm On Test Weight Of Soft Red Winter Wheat, Juan Mayta, Robert Bacon, John Kelly, Edward Gbur
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The effect of Triticum turgidum cytoplasm on soft red winter wheat (T. aestivum) was studied relative to test weight (bushel weight) and agronomic traits such as heading date, resistance to leaf rust, and plant color. The cytoplasmic effects were studied in three genetic backgrounds by crossing the cultivars Jackson, Pioneer 2684, and Wakefield with a plant introduction PI590277 that carried T. turgidum cytoplasm. Twelve alloplasmic and euplasmic populations were developed through a backcrossing procedure. The study used a micro test weight procedure to compare F4 lines within the populations for test weight. The data for other agronomic traits were taken …
Effects Of Virus Infection On Release Of Volatile Organic Compounds From Insect-Damaged Bean, Phaseolus Vulgaris, Sarah E. Sossamon, Britney K. Jackson, B. Alison Drumwright, Kenneth L. Korth, Gisela F. Erf
Effects Of Virus Infection On Release Of Volatile Organic Compounds From Insect-Damaged Bean, Phaseolus Vulgaris, Sarah E. Sossamon, Britney K. Jackson, B. Alison Drumwright, Kenneth L. Korth, Gisela F. Erf
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Insects can serve as important vectors of plant pathogens, especially viruses. Insect feeding on plants causes the systemic release of a wide range of plant volatile compounds that can serve as an indirect plant defense by attracting natural enemies of the herbivorous insect. Previous work suggests that the Mexican bean beetle (Epilachna varivestis) prefers to feed on plants infected by either of two viruses that it is known to transmit: Southern bean mosaic virus (SBMV) or Bean pod mottle virus (BPMV). A possible explanation for the preferred feeding on virus-infected tissues is that the beetles are attracted by volatile signals …
Instructions For Authors, Discovery Editors
Instructions For Authors, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Chitosanase May Enhance Anti-Fungal Defense Responses In Transgenic Tobacco, Bill L. Hendrix
Chitosanase May Enhance Anti-Fungal Defense Responses In Transgenic Tobacco, Bill L. Hendrix
Inquiry: The University of Arkansas Undergraduate Research Journal
Fungicides are expensive, dangerous, and can be harmful to the environment, but they are often necessary for profitable farming operations. New technologies may soon allow farmers to replace these chemicals with genetically engineered plants producing antifungal enzymes that degrade fungal cell walls. To explore this option, a Paenbacillus chitosanase gene was cloned, sequenced, and modified for plant expression. The modified gene was delivered to tobacco (Nicotiana tabacum L cv. Xanthine) leaf disks via Agrobacterium tumenfaciens-mediated transformation. The putative GMOs were tested for transgene integration, transcription, and translation. Confirmed transformants were then screened for enhanced responses to a Rhizoctonia solani cell …
Engineering For Expression Of The Cold Regulated Barley Protein Hvcr21 In E. Coli, Kathleen Graupman
Engineering For Expression Of The Cold Regulated Barley Protein Hvcr21 In E. Coli, Kathleen Graupman
The Journal of Undergraduate Research
HVCR21 is a barley protein known to be cold regulated at the mRNA level. However, its function as well as the affect of low temperature on its translation are unknown. The purpose of this project was to engineer E. coli to express recombinant HVCR21. PGR primers were designed for the 5' and 3' ends of the HVCR21 coding region. The primers were also designed with a 5' SacI restriction site and a 3' Pst I restriction site. After ligation of the PCR product into the pCR4-TOPO vector, bacteria were transformed and plated and the successful transformant verified by PCR. The …
The Role Of Natural Calcium Oxalate Crystals In Plant Defense Against Chewing Insects, Sarah J. Doege
The Role Of Natural Calcium Oxalate Crystals In Plant Defense Against Chewing Insects, Sarah J. Doege
Inquiry: The University of Arkansas Undergraduate Research Journal
Calcium oxalate is the most abundant insoluble mineral found in plants and it is common among many plant families. Calcium oxalate crystals in plants can appear as irregular rectangles, spiked balls, or needles. The formidable appearance of these crystals has lead to speculation that they might serve as a form of pest control by deterring chewing insects. We utilized mutant plant lines to assess the effects of plant calcium oxalate crystals on the survival and feeding habits of chewing insects. We have taken advantage of calcium oxalate-deficient (cod) mutants of the barrel medic, Medicago truncatula Calcium oxalate crystals accumulate in …
Flora Of Kumalar Mountain (Afyon), Ekrem Akçi̇çek
Flora Of Kumalar Mountain (Afyon), Ekrem Akçi̇çek
Turkish Journal of Botany
This study was carried out to determine the flora of Kumalar Mountain (Afyon) which is located in the transition zone between the Aegean and Central Anatolia. After the evaluation of 2204 plant specimens collected from the research area between 1996 and 2001, 89 families, 388 genera and 898 taxa were identified. Thirty-two taxa are cultivated and the rest are native. The number of endemic taxa is 122 (14.1%). The phytogeographic elements represented in the study area are as follows: Irano-Turanian 133 (15.4%), Mediterranean 99 (11.4%) and Euro-Siberian 73 (8.4%). The remaining 561 (64.8%) taxa belong to a few phytogeographic regions …
Isolation And Identification Of Soilborne Fungi In Fields Irrigated By Gap In Harran Plain Using Two Isolation Methods, Ayşe Di̇lek Azaz
Isolation And Identification Of Soilborne Fungi In Fields Irrigated By Gap In Harran Plain Using Two Isolation Methods, Ayşe Di̇lek Azaz
Turkish Journal of Botany
The microfungal flora of field soils irrigated by the South-eastern Anatolia Project (GAP: Güneydoğu Anadolu Projesi) in Harran Plain were investigated in terms of quality and quantity, using the soil dilution plate and soil washing methods. A total of 1690 microfungi were isolated from 105 soil samples. With the identification of these isolates, 109 species plus 16 different sterile fungi were identified. Sixty-two of these taxa were isolated through the soil dilution plate method, seven through the soil washing method, and 40 through both methods. The results indicate that ten of these species belong to Mucorales, four to Sphaeriales, one …
Nuclear Ribosomal Its Region Sequences For Differentiation Of Rubus Genotypes, Eric T. Stafne, John R. Clark, Allen L. Szalanski
Nuclear Ribosomal Its Region Sequences For Differentiation Of Rubus Genotypes, Eric T. Stafne, John R. Clark, Allen L. Szalanski
Journal of the Arkansas Academy of Science
Previous molecular investigations into Rubus species diversity have yielded significant knowledge about species relatedness. However, little work has been focused at the cultivar level. Random amplified polymorphic DNA(RAPD)-PCR studies have successfully differentiated closely related cultivars. The ability to definitively distinguish blackberry and red raspberry cultivars based on other molecular methods could prove useful in many aspects of breeding and proprietary protection. In this study, the nuclear ribosomal DNA internal transcribed spacer regions (ITS) of six Rubus cultivars were sequenced. DNA sequencing revealed little genetic variation among blackberry cultivars, but revealed distinctions between blackberry and red raspberry cultivars. Analysis by maximum-parsimony …
On The Rare Endemic Hydrophyllum Brownei Kral & Bates (Browne's Waterleaf): New Population Information And A Recommendation For Change In Status, Travis D. Marsico
On The Rare Endemic Hydrophyllum Brownei Kral & Bates (Browne's Waterleaf): New Population Information And A Recommendation For Change In Status, Travis D. Marsico
Journal of the Arkansas Academy of Science
Hydrophyllum brownei Krai & Bates (Browne's waterleaf), newly described in 1991, is endemic to the Ouachita Mountain Natural Division of Arkansas. For the purpose of better understanding population parameters within which H. brownei grows, ranges of shade values, population extents, and population distance relationships to streams were measured. Hydrophyllum brownei grows in extremely high shade, in populations of widely varying sizes, and always in association with a stream system. In order to list species associated with H. brownei, vouchers of species assemblages were collected at the H. brownei sites visited. The species is designated as critically imperiled globally because of …
The Anatomical And Palynological Properties Of Alyssum Obtusifolium Steven Ex Dc. (Brassicaceae), Nermi̇n Orcan, Riza Bi̇nzet
The Anatomical And Palynological Properties Of Alyssum Obtusifolium Steven Ex Dc. (Brassicaceae), Nermi̇n Orcan, Riza Bi̇nzet
Turkish Journal of Botany
Alyssum obtusifolium Steven ex DC. was explored in terms of its anatomical and palynological aspects. The root is perennial and it has alternating concentric zones of xylem with large and small vessels respectively. The number of vascular bundles is 13-15 in the stem. The leaves are isolateral and have stomata cells which are anisocytic. Both surfaces of the leaves are covered with stellate hairs. The pollen type of the specimens is tricolpate.
Letter From The Dean, Gregory J. Weidemann
Letter From The Dean, Gregory J. Weidemann
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
The Characteristics Of Consumers And Producers Using Farmers’ Markets, Walter Hugo Anez, Michael R. Thomsen
The Characteristics Of Consumers And Producers Using Farmers’ Markets, Walter Hugo Anez, Michael R. Thomsen
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
This study examines the perceptions of both consumers and producers towards farmers’ markets. Consumer perceptions are generalized from several previous studies conducted throughout the United States. Producer information was gathered through a survey of members of one farmers’ market in Arkansas. Previous studies, conducted in both rural and urban areas, indicate that the typical famers’ market customer is well educated and is of higher than average income. These consumers place great importance on quality of produce, knowledge that produce is grown locally, and the social interaction obtained through the farmers’ market experience. For producers, the farmers’ market is an important …
The Effects Of Potential Organic Apple Fruit Thinners On Gas Exchange And Growth Of Model Apple Trees: A Model Plant Study Of Transient Photosynthetic Inhibitors And Their Effect On Physiology And Growth, Jason D. Mcafee, Curt C. Rom
The Effects Of Potential Organic Apple Fruit Thinners On Gas Exchange And Growth Of Model Apple Trees: A Model Plant Study Of Transient Photosynthetic Inhibitors And Their Effect On Physiology And Growth, Jason D. Mcafee, Curt C. Rom
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Few fruit thinners have been certified for organic fruit growers. Previous studies have shown that herbicides or shade are capable of reducing photosynthesis and are effective fruit-thinning techniques, although impractical. This project evaluated use of a model plant system of vegetative apple trees grown under controlled conditions to study photosynthetic inhibitors, which could be used as potential organic thinning agents. Various concentrations of osmotics, salts, and oils (lime-sulfur, potassium bisulfite, potassium bicarbonate, sodium chloride, soybean oil) were applied to actively growing apple trees and showed a reduced trend on the rate of apple tree photosynthetic assimilation (Pn), evapotranspiration (Et), and …
Response Of Blackberry Cultivars To Nematode Transmission Of Tobacco Ringspot Virus, Alisha Sanny, John R. Clark, Rose Gergerich
Response Of Blackberry Cultivars To Nematode Transmission Of Tobacco Ringspot Virus, Alisha Sanny, John R. Clark, Rose Gergerich
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
A study was conducted on eight cultivars of blackberry (‘Apache’, ‘Arapaho’, ‘Chester’, ‘Chickasaw’, ‘Kiowa’, ‘Navaho’, ‘Shawnee’, and ‘Triple Crown’), of which four plants of each were previously determined in the fall of 2001 to have root, but not leaf, infection with Tobacco ringspot virus (TRSV). The objectives of our study were to determine virus effects on plant vigor and the spread of virus infection in the plants. Eight plants of each cultivar, four infected and four free of infection, were grown in pots on a gravel pad for the 2002 growing season, and samples of primocane and floricane leaves were …
The Hedwigia Ciliata (Hedw.) Ehr. Ex P.Beauv. Complex In Turkey, With A New Record, H. Ciliata Var. Leucophaea Bruch & Schimp. (Hedwigiaceae, Bryopsida), Adnan Erdağ, Mesut Kirmaci, Harald Kürschner
The Hedwigia Ciliata (Hedw.) Ehr. Ex P.Beauv. Complex In Turkey, With A New Record, H. Ciliata Var. Leucophaea Bruch & Schimp. (Hedwigiaceae, Bryopsida), Adnan Erdağ, Mesut Kirmaci, Harald Kürschner
Turkish Journal of Botany
Hedwigia ciliata (Hedw.) Ehrh. ex P.Beauv. var. leucophaea Bruch & Schimp. is recorded as a new taxon for the bryophyte flora of Turkey. It belongs to the H. ciliata complex sensu lata that consists of three different taxa: H. stellata, H. ciliata var. ciliata, and H. ciliata var. leucophaea. As all three taxa occur in Turkey, a key to the species, descriptions, illustrations of the diagnostic characters, as well as their distribution in Turkey are presented.
Gene Family Encoding Hordeum Vulgare Translation Elongation Factor 1 Alpha (Ef-1a): Assignment Based On Bioinformatic Analysis Of Cdna Sequences, Jackson Moeller
Gene Family Encoding Hordeum Vulgare Translation Elongation Factor 1 Alpha (Ef-1a): Assignment Based On Bioinformatic Analysis Of Cdna Sequences, Jackson Moeller
The Journal of Undergraduate Research
Search of international DNA database, Genbank, produced eight barley cDNA EFlα sequences with unique accession numbers. The length of these sequences varied from an incomplete 502 bp to a full length 1646 bp encoding a 447 amino acid protein. The knowledge that there are four EF-lα gene family members in barley led us to query whether all four genes were represented in the group of eight database submitted sequences. Also of great importance was the correct assignment of gene family member to its mRNA and protein expression profiles. Before we could begin to address the expression studies, we undertook the …
Response Of Blackberry Cultivars To Nematode Transmission Of Tobacco Ringspot Virus, Alisha Sanny
Response Of Blackberry Cultivars To Nematode Transmission Of Tobacco Ringspot Virus, Alisha Sanny
Inquiry: The University of Arkansas Undergraduate Research Journal
A study was conducted on eight cultivars of blackberry ('Apache', 'Arapaho', 'Chester', 'Chickasaw', 'Kiowa', 'Navaho', 'Shawnee', and 'Triple Crown'), of which four plants of each were previously determined in the fall of 2001 to have root, but not leaf, infection with Tobacco ringspot virus (TRSV). The objective of our study was to determine virus effects on plant vigor, and the spread of virus infection in the plants. Eight plants of each cultivar, four infected and four free of infection, were grown in pots on a gravel pad for the 2002 growing season, and samples of primocane and floricane leaves were …
Characterization Of Wound-Inducible Genes Encoding Enzymes For Terpenoid Biosynthesis In Medicago Truncatula, Mandy M. Cox
Characterization Of Wound-Inducible Genes Encoding Enzymes For Terpenoid Biosynthesis In Medicago Truncatula, Mandy M. Cox
Inquiry: The University of Arkansas Undergraduate Research Journal
In addition to having numerous applications and pharmaceuticals, terpenoids are an important class of defensive compounds that can accumulate in plants after pathogen infection or injury by insects. Sequences of DNA encoding putative terpene synthases and an oxidosqualene synthase, isolated from insect-damaged Medicago truncatula leaves, were selected from an expressed sequence tag (EST) data base. The cDNA clones were used as radio-labeled probes to analyze gene expression in leaves treated with factors known to trigger a defense response in plants. Transcript levels for all of the genes examined increased in response to artificial wounding, insect herbivory, and methyl jasmonate (meJA) …
Taxonomy And Conservation Status Of Acantholimon Laxiflorum Boiss. Ex Bunge (Plumbaginaceae), Musa Doğan, Hayri̇ Duman, Gali̇p Akaydin
Taxonomy And Conservation Status Of Acantholimon Laxiflorum Boiss. Ex Bunge (Plumbaginaceae), Musa Doğan, Hayri̇ Duman, Gali̇p Akaydin
Turkish Journal of Botany
Acantholimon laxiflorum Boiss. ex Bunge (Plumbaginaceae), a local endemic species in Turkey, was subjected to taxonomic analysis in order to clarify its taxonomic status, because this species seems to have been wrongly treated and overlooked since it was first described by Boissier. The species is restricted to the east of Arsuz (C5 Hatay, Turkey) along dry riverbank, where it grows in rocky places on serpentine rocks. A full description and an illustration of the species are given, along with some additional information dealing with its ecology, phytogeography and conservation status.
A Chemotaxonomic Approach To The Fatty Acid And Tocochromanol Content Of Cannabis Sativa L. (Cannabaceae), Eyüp Bağci, Ludger Bruehl, Kurt Aitzetmuller, Yasi̇n Altan
A Chemotaxonomic Approach To The Fatty Acid And Tocochromanol Content Of Cannabis Sativa L. (Cannabaceae), Eyüp Bağci, Ludger Bruehl, Kurt Aitzetmuller, Yasi̇n Altan
Turkish Journal of Botany
In this study, the fatty acid, tocopherol and tocotrienol composition in the seed oil of Cannabis sativa L., which is traded under the common name hemp seed oil, were determined by using GLC and HPLC techniques. While \alpha- linolenic, linoleic, oleic and palmitic acid were the main fatty acid components, \gamma - linolenic (18:3 n-6) and stearidonic acid (18:4 n-3) were found as unusual minor fatty acids in the seed oil. \gamma - linolenic acid is an important fatty acid used both as a healthy nutrient and as a therapeutic agent. The occurrence of this fatty acid in some plant …
A New Record For Turkey: Euclidium Tenuissimum (Pall.) B.Fedtsch. (Brassicaceae), Murat Ünal, Lütfi̇ Behçet
A New Record For Turkey: Euclidium Tenuissimum (Pall.) B.Fedtsch. (Brassicaceae), Murat Ünal, Lütfi̇ Behçet
Turkish Journal of Botany
Euclidium tenuissimum (Pall.) B.Fedtsch. (Brassicacecae) is recorded for the first time (B9 Van) for the flora of Turkey. Some variations of the species bearing differences from its known description are given.
New Records For The Genus Heterodinium Kofoid (Dinophyceae) From Turkish Coastal Waters (North-Eastern Mediterranean), Sevi̇m Polat, Tufan Koray
New Records For The Genus Heterodinium Kofoid (Dinophyceae) From Turkish Coastal Waters (North-Eastern Mediterranean), Sevi̇m Polat, Tufan Koray
Turkish Journal of Botany
Three species of the genus Heterodinium Kofoid are reported for the first time in Turkish coastal waters, in the north-eastern Mediterranean. The identified species are Heterodinium mediocre Kofoid, H. angulatum Kofoid & Michener and H. inaequale Kofoid. The morphological characteristics of these three species are described and information about their distribution is given.
The Flora Of Hatila Valley National Park And Its Close Environs (Artvin), Özgür Emi̇nağaoğlu, Rahi̇m Anşi̇n
The Flora Of Hatila Valley National Park And Its Close Environs (Artvin), Özgür Emi̇nağaoğlu, Rahi̇m Anşi̇n
Turkish Journal of Botany
This investigation was carried out between 1994 and 1997 in order to contribute to knowledge on Artvin's flora. The Artvin area reflects the eastern part of the Black Sea region's rich floristic composition. The research area under review is in the Colchic province of the Euro-Siberian floristic area in the Holarctic region and is found in the A8 square according to grid system of Davis. In the studied area, 769 taxa belonging to 374 genera and 95 families were determined. Of the 769 taxa, 26 Pteridophytes and 743 Spermatophytes were detected. Spermatophytes also contained 10 Gymnospermae and 733 Angiospermae taxa. …