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Full-Text Articles in Life Sciences
Characterization Of Bacteriophages Of Pseudomonas Syringae Pv. Tomato, Sara E. Prior, Amanda J. Andrews, Russell O. Nordeen
Characterization Of Bacteriophages Of Pseudomonas Syringae Pv. Tomato, Sara E. Prior, Amanda J. Andrews, Russell O. Nordeen
Journal of the Arkansas Academy of Science
Bacteriophages from supernatants of the plant pathogenic bacteria Pseudomonas syringae pv. tomato (P. tomato) were isolated, enriched, and purified by density block centrifugation in cesium chloride (CsCl) step gradients. The DNA from purified phage was isolated and digested with the restriction endonucleases EcoRl or HindIII. Three different DNA fingerprint patterns were determined indicating 3 unique phage isolates. Genome sizes of the phage ranged from 40 to 52 kilobases (kB). Buoyant densities of phage particles in CsCI varied from 1.36 to 1.51 glml. Electron microscopy revealed a single morphological type with an elongated polyhedral head and a long tail indicating the …
Characterization Of A PorosTm-Fumonisin B1 Affinity Column For Isolating Ceramide Synthase From Rat Liver, S. Jernigan, W. B. Melchior Jr., G. R. Jenkins, K. L. Rowland, D. W. Roberts, P. C. Howard, H. Tolleson
Characterization Of A PorosTm-Fumonisin B1 Affinity Column For Isolating Ceramide Synthase From Rat Liver, S. Jernigan, W. B. Melchior Jr., G. R. Jenkins, K. L. Rowland, D. W. Roberts, P. C. Howard, H. Tolleson
Journal of the Arkansas Academy of Science
Fumonisin B1 is a mycotoxin produced by fungi of the genus Fusarium, common pathogens of corn and other grain plants. Toxic effects associated with fumonisin B1 include equine leukoencephalomacia, porcine pulmonary edema, rat renal carcinoma, and murine hepatocellular carcinoma. Increased risk for esophageal cancer in humans has been epidemiologically associated with consumption of corn contaminated with Fusarium, suggesting that fumonisin B1 may be involved. The biological effects of fumonisin B1 exposure result primarily from disruption of de novo sphingolipid biosynthesis via inhibition of ceramide synthase. Exposure of animals or cultured cells to fumonisin B1 results in the characteristic accumulation of …
Optical Transmittance Of A Rice Leaf Via Ray Tracing, Stephen Nicoletti, Alois (Al) J. Adams
Optical Transmittance Of A Rice Leaf Via Ray Tracing, Stephen Nicoletti, Alois (Al) J. Adams
Journal of the Arkansas Academy of Science
Optical reflectance from a plant leaf increases in response to stress and disease. Previous studies at the University of Arkansas at Little Rock found that, while the reflectance from a rice leaf increased with increased salinity, reflectance changes could not be used to differentiate one stress or disease from another. The objective of this study is to characterize the angular distribution of optical transmittance for a healthy rice leaf using a ray tracing technique and assuming a three-media optical model. The ultimate goal is to relate this distribution to specific plant pathologies. Three rays are traced through the cross section …
Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew
Effect Of Media Constituents On In Vitro Culturing Of Cowpea (Vigna Unguiculata) Shoot Tip And Leaf Disk Explants, Mohanjeet S. Brar, Edwin J. Anderson, Teddy E. Morelock, Ronald W. Mcnew
Journal of the Arkansas Academy of Science
Cowpea is an important legume food crop that is commonly grown in Arkansas and numerous other southern states. The application of biotechnological approaches for the improvement of U.S. cowpea genotypes is currently not possible due to the lack of a regeneration and transformation system. Therefore, the first priority of our research efforts is the development of a plant regeneration system that will facilitate plant transformation studies. In an effort to optimize the media requirements for tissue culturing cowpea, we evaluated the in vitro response of shoot tip and leaf disk explants to various levels of Murashige and Skoog (MS) macro …
Partial Characterization Of Bacteriophages Of Pseudomonas Syringae Pv.Tomato, Scott M. Minor, Russell O. Nordeen, Chad E. Paschall
Partial Characterization Of Bacteriophages Of Pseudomonas Syringae Pv.Tomato, Scott M. Minor, Russell O. Nordeen, Chad E. Paschall
Journal of the Arkansas Academy of Science
No abstract provided.
Role Of Endophytes In Tall Fescue, E. L. Piper, C. P. West
Role Of Endophytes In Tall Fescue, E. L. Piper, C. P. West
Journal of the Arkansas Academy of Science
Tall fescue (Festuca arundinacea Schreb.) is the most commonly grown cool season grass used for pastures in Arkansas. Most tall fescue contains a fungal endophyte (Acremonium coenophialum Morgan-Jones & Gams), which causes fescue toxicosis in livestock and costs cattle producers millions of dollars annually in lost production. Endophyte presence is known to reduce wild mammal populations in areas where tall fescue is prevalent. The endophyte spends its entire life cycle within the plant and is transmitted through the seed. The association is mutualistic with the plant providing nutrients for the endophyte and the endophyte conferring drought, insect, and nematode resistance …
Biological Vectors For The Dispersal Of Colletotrichum Gloeosporioides, X. B. Yang, D. O. Tebeest, E. L. Moore
Biological Vectors For The Dispersal Of Colletotrichum Gloeosporioides, X. B. Yang, D. O. Tebeest, E. L. Moore
Journal of the Arkansas Academy of Science
Green treefrogs (Hyla cinerea) and grasshoppers (Melanoplus differentialis and Conocephalus fasciatus) commonly observed in Arkansas rice fields, are dispersal vectors for Colletotrichum gloeosporioides f. sp. aeschynomens, a causal agent of anthracnose of northern jointvetch. Treefrogs and grasshoppers captured from rice or soybean fields with diseased northern jointvetch were placed in containers in contact with healthy northern jointvetch plants. An average of 90% of northern jointvetch plants was infected by the pathogen with up to 10 lesions per plant using treefrog vectors. Experiments were done in the greenhouse on frog dispersal by monitoring disease development from a point source in closed …
Evaluation Of Aposphaeria Amaranthi As A Bioherbicide For Pigweed (Amaranthus Spp.), A. S. Mintz, G. J. Weidmann
Evaluation Of Aposphaeria Amaranthi As A Bioherbicide For Pigweed (Amaranthus Spp.), A. S. Mintz, G. J. Weidmann
Journal of the Arkansas Academy of Science
Studies were conducted to determine the potential of the fungus, Aposphaeria amaranth!, as a bioherbicide for pigweeds (Amaranthus spp.). Experiments to establish the environmental parameters necessary for control of tumble pigweed (A. albus) demonstrated that an 8-hr dew period was sufficient for control of seedlings with four to six leaves, and that temperatures ranging from 20 to 28 C were conducive for disease development. Conidial concentrations as lowas 1x 10s conidia per ml also were sufficient for plant mortality. Host range tests demonstrated pathogenicity of A. amaranthi to several other species of Amaranthus, including biotypes resistant to triazine herbicides. Disease …
Infection Rate Of Tall Fescue With Acremonium Coenephialum, B. J. Hankins, Terry Kirkpatrick
Infection Rate Of Tall Fescue With Acremonium Coenephialum, B. J. Hankins, Terry Kirkpatrick
Journal of the Arkansas Academy of Science
No abstract provided.
Host Reactions And Physical Properties Of Four Isolates Of Tobacco Ringspot Virus, Lisa Smith, James M. Mcguire
Host Reactions And Physical Properties Of Four Isolates Of Tobacco Ringspot Virus, Lisa Smith, James M. Mcguire
Journal of the Arkansas Academy of Science
No abstract provided.
Macroscopic And Microscopic Responses Of Gossypium Hirsutum L. To Hydrogen Fluoride Fumigation, Dan Timmermann Jr., Howard G. Applegate, E. Mark Engleman
Macroscopic And Microscopic Responses Of Gossypium Hirsutum L. To Hydrogen Fluoride Fumigation, Dan Timmermann Jr., Howard G. Applegate, E. Mark Engleman
Journal of the Arkansas Academy of Science
No abstract provided.
Enzymatic Evidence That Leucine From Tentoxin In Levorotatory, J. T. Daniel, George E. Templeton
Enzymatic Evidence That Leucine From Tentoxin In Levorotatory, J. T. Daniel, George E. Templeton
Journal of the Arkansas Academy of Science
No abstract provided.
Effect Of Culture Environment Upon Sporangium And Zoospore Production Of Three Species Of Phytophthora, J. L. Dale, J. P. Jones
Effect Of Culture Environment Upon Sporangium And Zoospore Production Of Three Species Of Phytophthora, J. L. Dale, J. P. Jones
Journal of the Arkansas Academy of Science
No abstract provided.
Purification Of Soybean Mosaic Virus, Wayne G. Horn, H. J. Walters
Purification Of Soybean Mosaic Virus, Wayne G. Horn, H. J. Walters
Journal of the Arkansas Academy of Science
No abstract provided.
Translocation Of Tobacco Ringspot Virus In Cucumber And Zinnia, B. J. Moore, J. M. Mcguire
Translocation Of Tobacco Ringspot Virus In Cucumber And Zinnia, B. J. Moore, J. M. Mcguire
Journal of the Arkansas Academy of Science
No abstract provided.
Quantitative Differences In Alanine In Rice Panicles Of Varieties Resistant And Susceptible To Kernel Smut, J. G. Goodman, George E. Templeton
Quantitative Differences In Alanine In Rice Panicles Of Varieties Resistant And Susceptible To Kernel Smut, J. G. Goodman, George E. Templeton
Journal of the Arkansas Academy of Science
No abstract provided.
Identification Of Ninhydrin Positive Components In Ethanolic Extracts Of Rice Panicles By Paper Chromatography, C. I. Grable, J. E. Presley, George E. Templeton
Identification Of Ninhydrin Positive Components In Ethanolic Extracts Of Rice Panicles By Paper Chromatography, C. I. Grable, J. E. Presley, George E. Templeton
Journal of the Arkansas Academy of Science
No abstract provided.
Identification Of The Free Amino Acids Of Nematode Resistant And Susceptible Soybeans, J. R. Young, Robert D. Riggs
Identification Of The Free Amino Acids Of Nematode Resistant And Susceptible Soybeans, J. R. Young, Robert D. Riggs
Journal of the Arkansas Academy of Science
No abstract provided.
List Of The Smut Fungi Of Arkansas, George E. Templeton
List Of The Smut Fungi Of Arkansas, George E. Templeton
Journal of the Arkansas Academy of Science
No abstract provided.
Spinach And Aphid Control By Ladybird Beetles, James E. Roberts
Spinach And Aphid Control By Ladybird Beetles, James E. Roberts
Journal of the Arkansas Academy of Science
No abstract provided.
Prussic Acid Poisoning In Common Vetch (Vicia Sativa) Seed, E. S. Ruby, J. Beasley, E. L. Stephenson
Prussic Acid Poisoning In Common Vetch (Vicia Sativa) Seed, E. S. Ruby, J. Beasley, E. L. Stephenson
Journal of the Arkansas Academy of Science
No abstract provided.
Cowpea And Bean Weevils, W. D. Wylie
Cowpea And Bean Weevils, W. D. Wylie
Journal of the Arkansas Academy of Science
No abstract provided.
Breeding Cereal Crops For The Control Of Disease, H. R. Rosen
Breeding Cereal Crops For The Control Of Disease, H. R. Rosen
Journal of the Arkansas Academy of Science
No abstract provided.