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Improvement Of Rice Through Somaculture (Somaclonal Variation, Plant Histology, Cell Culture)., Cao Jun
Improvement Of Rice Through Somaculture (Somaclonal Variation, Plant Histology, Cell Culture)., Cao Jun
LSU Historical Dissertations and Theses
Research was conducted to develop methods for improving rice through somaclonal variation using plant tissue culture techniques. Experiments were directed toward developing an efficient culture system by which plants could be efficiently regenerated in rice somaculture. Histological studies of the process of callus formation and plant regeneration were also carried out. Explant sources evaluated for their potential for callus induction and plant regeneration included seedling mesocotyl, root-tips, embryos from mature seeds, nodes, immature panicles, and mature panicles. Immature panicles gave the best callus induction and plant regeneration. It was determined that it was necessary to add 2,4-D to the medium …
Determination Of The Thermal Death Time Of Clostridium Botulinum Type E In Crawfish (Procambarus Clarkii) Tailmeat., Carmen Alicia Oquendo De Pantoja
Determination Of The Thermal Death Time Of Clostridium Botulinum Type E In Crawfish (Procambarus Clarkii) Tailmeat., Carmen Alicia Oquendo De Pantoja
LSU Historical Dissertations and Theses
The thermal death time of Clostridium botulinum type E spores in crawfish tailmeat was determined at temperatures ranging from 80 to 95(DEGREES)C. Crawfish paste containing 10('6) spores per gram was dispensed into 16 x 125 mm test tubes, which were subsequently placed in water baths preset at the test temperatures. Sample tubes were removed from the baths at predetermined time intervals and incubated anaerobically for up to two months. The D value for the spores in crawfish tailmeat was determined from the corrected time of exposure to the heat and survival data using three methods of calculation. D values were …
Some Factors Associated With The Effectiveness Of The Agricultural Production Component In Areas Of Integrated Rural Development In Colombia As Perceived By Farmers (Crop Technology)., Luis Eduardo Chaves E.
Some Factors Associated With The Effectiveness Of The Agricultural Production Component In Areas Of Integrated Rural Development In Colombia As Perceived By Farmers (Crop Technology)., Luis Eduardo Chaves E.
LSU Historical Dissertations and Theses
This study was conducted in two Integrated Rural Development Districts in Colombia; South Tolima and Fusagasuga. Its specific objectives were: (1) To determine the extent to which: (a) the factors included in the agricultural production component of the DRI program (research, extension, credit, marketing), in addition to farmland and climate were limiting crop productivity; (b) the DRI program was effectively transferring crop technology; (c) farmers adopted recommended crop technology; (2) To determine: (a) some of the reasons that limited adoption of agricultural technology; (b) changes in crop production; (c) some relevant characteristics of the DRI credit and marketing programs; (d) …
Chemical And Physical Characteristics Of Pepper Mash And Hot Pepper Sauce., Abdul Rahman Awad
Chemical And Physical Characteristics Of Pepper Mash And Hot Pepper Sauce., Abdul Rahman Awad
LSU Historical Dissertations and Theses
Three different treatments of salt 6, 8 and 10% were used in the process of aging hot pepper mash in oak and plastic barrels over a period of two years. The chemical characteristics of the changes during the aging process of these mashes were determined. These characteristics included pH, titratable acidity, salt content, color changes and total pectic substances. The pectic substances were degraded by the hot pepper pectic enzymes very rapidly after only a few days of aging. This degradation could be retarded by increasing the salt content of the mash or by aging in oak barrels. However, the …
Effect Of Water-Management On The Etiology And Epidemiology Of Rice Blast Caused By Pyricularia Oryzae Cav., Choong-Hoe Kim
Effect Of Water-Management On The Etiology And Epidemiology Of Rice Blast Caused By Pyricularia Oryzae Cav., Choong-Hoe Kim
LSU Historical Dissertations and Theses
This research was conducted to examine the nature of the difference in resistance to blast under different water-management systems. Two cultivars; M-201, susceptible, and Brazos, partially resistant to blast, grown in flooded and upland (unflooded) field plots were inoculated with race IH-1 of Pyricularia oryzae in 1984 and 1985. Final disease ratings on M-201 and Brazos averaged 77.6% and 39.8% under upland conditions and 1.1% and 0.1% under flooded conditions, respectively. When blasted plants in upland plots were flooded, the rate of blast development decreased on Brazos but changed little on M-201. No increase in disease was observed when flooded …
Heritability Of Flowering In Sugarcane., Imran Mohammad
Heritability Of Flowering In Sugarcane., Imran Mohammad
LSU Historical Dissertations and Theses
Heritability and other genetic effects for the date of first flowering, date of maximum flowering, average flowering date, percent flowering, pith and brix in sugarcane were estimated in a diallel cross experiment. A three year study indicated that the date of first flowering, date of maximum flowering, average flowering date, and percent flowering were highly heritable characters. The heritability estimates of pith and brix were very low and variable. Partitioning of total direct response in parental lines into average direct and average maternal genetic effects indicated that average maternal genetic effects of the early and late lines were larger in …
Sources Of Inoculum And Factors Favoring Infection Of Sweet Potato By The Java Black Rot Pathogen, Diplodia Gossypina Cke. (Postharvest Disease, Wound Periderm Formation, Resistance)., Jing-Yi Lo
LSU Historical Dissertations and Theses
Diplodia gossypina was only isolated from the basal portion of sweet potato sprouts growing from mother roots which were bedded adjacent to diseased roots, bedded in infested soil or inoculated with conidial suspension before bedding. It was recovered 1-2 cm above and 2-4 cm below the point of inoculation 2 months after inoculation of wounded established vines. It was not isolated from the proximal or distal ends of roots harvested from field plots in which vine cuttings or established vines were artificially inoculated or when vine cuttings were planted in artificially infested soil. Roots harvested from infested soil showed higher …
Resistance To Cercospora Oryzae In Rice (Physiologic Races, Histopathology)., Dip Narayan Sah
Resistance To Cercospora Oryzae In Rice (Physiologic Races, Histopathology)., Dip Narayan Sah
LSU Historical Dissertations and Theses
Isolates of Cercospora oryzae were readily obtained by incubating pieces of surface sterilized diseased leaf or leaf sheath samples in a moist chamber at 28 C. Sporulation on culture media was significantly higher following incubation at 28 C on cornmeal agar than on water agar, V-8 juice agar, and potato-dextrose agar. Narrow brown leaf spot lesions developed on leaves when inoculated plants were placed inside a humidified chamber for 1 to 16 days. It was possible to differentiate resistant cultivars from susceptible cultivars when 3-wk-old plants were inoculated. Single spore isolates of C. oryzae were isolated from the leaf and …
Development Of An Extruded Whole Cottonseed Product As A Bypass Protein Source For Lactating Dairy Cattle., Jana Allene Stutts
Development Of An Extruded Whole Cottonseed Product As A Bypass Protein Source For Lactating Dairy Cattle., Jana Allene Stutts
LSU Historical Dissertations and Theses
Whole cottonseed extruded at temperatures ((DEGREES)C) and rates (kg/hour) of 131, 314; 135, 182; 146, 195; and 156, 286 was evaluated for protein solubility, in vitro ammonia production, and in situ disappearance to estimate bypass protein potential. Whole cottonseed, soybean meal, corn gluten meal, and soybean meal and whole cottonseed heated for 4 hours at 127, 138, and 149(DEGREES)C were also evaluated for comparison. Solubility was determined by three methods: hot water-refluxed 1 hour; cold water-mixed 30 minutes; and cold water-homogenized 5 seconds. Ammonia production was measured after 2, 4, and 6 hour incubations. Disappearance of crude protein and dry …
The Response Of Saccharum Species To Growth Regulators Used As Tillering Agents (Sugarcane)., Keith P. Bischoff
The Response Of Saccharum Species To Growth Regulators Used As Tillering Agents (Sugarcane)., Keith P. Bischoff
LSU Historical Dissertations and Theses
This study was conducted to identify those plant growth regulators that cause the greatest increase in shoot number of basic genotypes of the genus Saccharum and at the same time identify those genotypes that exhibit a high degree of response to certain growth regulators which have been proposed as tillering agents. A series of three factorial experiments was conducted under controlled conditions in the greenhouse utilizing fourteen cultivars representing the spectrum of the genus Saccharum along with five synthetic growth regulators proposed as tillering agents. Treatments were applied to the plants one month after germination. Shoot number and shoot height …
Redox, Ph, And Ion Chemistry Of Acid Sulfate Rice Soils In Thailand., Sunchai Satawathananont
Redox, Ph, And Ion Chemistry Of Acid Sulfate Rice Soils In Thailand., Sunchai Satawathananont
LSU Historical Dissertations and Theses
Five Thailand soils belonging to the Rangsit Very Acid (Rsa), Rangsit (Rs), Mahaphot (Ma), Bang Pakong (Bg), and Bangkok (Bk) series were employed in redox-pH-ion chemistry studies. Decreases in soil redox potential upon submergence were relatively slower and less intense in the acid sulfate soils than in the non-acid marine soil. Among the acid sulfate soils, the Rsa soil was most sluggish with respect to decreases in redox potential. Addition of organic matter or liming in combination with submergence accelerated decreases in redox potential in the flooded Rsa soil as well as in the other acid sulfate soils to the …
Response Of Itchgrass And Johnsongrass To Asulam/Dalapon Combinations (Sugarcane, Absorption, Translocation)., Barbara Jean Hook
Response Of Itchgrass And Johnsongrass To Asulam/Dalapon Combinations (Sugarcane, Absorption, Translocation)., Barbara Jean Hook
LSU Historical Dissertations and Theses
A series of studies were conducted from 1983-1985 under greenhouse, field, and laboratory conditions. Activities of asulam methyl (4-aminophenyl)sulfonyl carbamate , dalapon (2,2-dichloropropionic acid) and asulam/dalapon combinations on itchgrass (Rottboellia exaltata L.f.) and johnsongrass Sorghum halepense (L.) Pers. were examined. Combinations consisted of tank mixes and sequential applications. Visual evaluations were taken 3 and 6 weeks after treatment (WAT) in 1983 and 4 and 8 WAT in 1984. Twelve WAT plant height, stem number, seedhead number and biomass were measured. Visual evaluation results paralleled quantitative measurements. Itchgrass and johnsongrass control equivalent to or greater than control obtained with 3.7 kg/ha …
Effects Of Photoperiods At Nonoptimal Planting Dates On Branch Development And Yield Of Soybeans Glycine Max (L.) Merr., John Robert Settimi
Effects Of Photoperiods At Nonoptimal Planting Dates On Branch Development And Yield Of Soybeans Glycine Max (L.) Merr., John Robert Settimi
LSU Historical Dissertations and Theses
Planting soybeans between early May and early June provides the highest yield. Planting either before or after this optimal time can significantly reduce yields. Most of the yield from determinate soybeans comes from the branches. Branch development and yield are reduced at nonoptimal planting dates, while main axis yield is not. The relatively short photoperiods of nonoptimal planting dates appears to cause the reduction of both the vegetative and reproductive growth periods resulting in reduced development and yield. The objectives of this dissertation were to: Characterize the development of branches in relation to that of the main axis at different …
Experimental Hemarthrosis In Rhesus Monkeys: Light Microscopic, Scanning And Transmission Electron Microscopic, Biochemical, Metabolic And Morphometric Analyses., David Henry Zeman
Experimental Hemarthrosis In Rhesus Monkeys: Light Microscopic, Scanning And Transmission Electron Microscopic, Biochemical, Metabolic And Morphometric Analyses., David Henry Zeman
LSU Historical Dissertations and Theses
Hemarthrosis in rhesus monkeys was studied to: (1) provide information regarding the possible relationship between traumatic hemarthrosis and naturally occurring calcium pyrophosphate dihydrate-deposition disease (CPPD-DD) in rhesus monkeys, (2) fill a void in the literature regarding experimental hemarthrosis in primates, (3) and study the early changes that occur in blood-induced cartilage destruction by adding biochemical, metabolic and morphometric analyses to the traditional morphologic evaluations. Three ml of autologous blood were injected into the left knee of 16 anesthetized monkeys; the right knee was an untreated control. Monkeys were sacrificed at 7 days, 2, 3, and 6 months post injection (PI). …
The Effects Of Feeding Direct Solvent-Extracted Cottonseed Meal To Yearling Holstein Bulls On Growth Rate, Semen Quality, And Spermatogenesis., David A. Jimenez
The Effects Of Feeding Direct Solvent-Extracted Cottonseed Meal To Yearling Holstein Bulls On Growth Rate, Semen Quality, And Spermatogenesis., David A. Jimenez
LSU Historical Dissertations and Theses
A sensitive, rapid, and accurate method for extraction and analysis of gossypol in bovine plasma and tissue by high-performance liquid chromatography was developed. A three day old Guernsey bull calf absorbed gossypol after single oral dose of gossypol acetic acid in corn oil (5 mg/kg of body weight). Maximum level of plasma gossypol (5.5 ug/ml) was absorbed at 6 hours after treatment. Average gossypol recoveries from plasma and tissue samples spiked before extraction were 88.2% and 82.9%, respectively. Nine yearling Holstein bulls were used to evaluate the effect of feeding direct solvent-extracted cottonseed meal containing gossypol and soybean meal rations …
Use Of Tissue Culture Methods In Screening For Anthracnose (Colletotrichum Fragariae Brooks) Resistance In Strawberry., Violeta Nano Villegas
Use Of Tissue Culture Methods In Screening For Anthracnose (Colletotrichum Fragariae Brooks) Resistance In Strawberry., Violeta Nano Villegas
LSU Historical Dissertations and Theses
Calli derived from 'Tangi' (susceptible) and MSUS 42 and LA 8318 (resistant) exhibited differential responses when inoculated with Colletotrichum fragariae, isolate CF1. The best differential in terms of growth and multiplication of the fungus was observed at 15(DEGREES)C and this differential decreased with increasing incubation temperature and time. Level of benzyladenine in the medium did not affect disease expression. Susceptible tissues exhibited extreme sensitivity, characterized by intense discoloration and cessation of growth, when subcultured onto a medium containing the culture filtrate of C. fragariae while the resistant tissues were affected less. The efficacy of the culture filtrate was not affected …
Dynamics And Bioavailability Of Folates In Bovine Liver As A Function Of Processing And Frozen Storage (Folic Acid, Pteroylglutamates, Beef Liver)., Fadi Michael Aramouni
Dynamics And Bioavailability Of Folates In Bovine Liver As A Function Of Processing And Frozen Storage (Folic Acid, Pteroylglutamates, Beef Liver)., Fadi Michael Aramouni
LSU Historical Dissertations and Theses
Raw, broiled and fried beef liver samples were stored at -20(DEGREES)C in either vacuum or air-saturated packages. At periods of 30, 60 and 90 days the folates were extracted and analyzed by reverse phase high performance liquid chromatography (HPLC). Tetrahydrofolic acid (THF), dihydrofolic acid (DHF), 5-CH(,3)-THF, 5-CHO-THF and pteroylglutamic acid (PGA) were identified and quantitated. Two major folate oxidation products, pterin-6-carboxylic acid (pt-6-COOH) and p-aminobenzoylglutamic acid (p-ABG) were also detected. The total folate content of beef liver was higher than previously reported. PGA was not found in any of the samples but a large peak corresponding to the retention time …
Qualitative And Quantitative Effects Of Temperature On The Growth And Development Of Three Cultivars Of Lilium Longiflorum, Thunb. (Heat-Units, Degree-Days, Degree-Hours)., Lester Aubrey Estes Jr
Qualitative And Quantitative Effects Of Temperature On The Growth And Development Of Three Cultivars Of Lilium Longiflorum, Thunb. (Heat-Units, Degree-Days, Degree-Hours)., Lester Aubrey Estes Jr
LSU Historical Dissertations and Theses
Three cultivars of Lilium longiflorum, Thunb., 'Ace', 'Nellie White' and 'Harson' were forced for the spring of 1983 and 1984 in greenhouse sections with minimum temperatures of 10, 14.5 or 18.9(DEGREES)C until 5 weeks after emergence (phase 1). Plants from each temperature treatment were then divided equally among the 3 temperature regimes (phase 2) to give 9 temperature histories. The design was based on results from a preliminary experiment in 1982. Fewer flowers, fewer leaves and shorter terminal height were associated with higher minimum temperatures. Flower and leaf number were most affected by early (phase 1) temperature treatment. 'Ace' produced …
Plant Germination And Growth Inhibitors From Ceratiola Ericoides And Calamintha Ashei (Herbicides, Allelopathy, Monoterpenes, Phenolics)., Nesrin Tanrisever
Plant Germination And Growth Inhibitors From Ceratiola Ericoides And Calamintha Ashei (Herbicides, Allelopathy, Monoterpenes, Phenolics)., Nesrin Tanrisever
LSU Historical Dissertations and Theses
As part of a chemical-ecological study of the Florida scrub community, Ceratiola ericoides (Empetraceae) and Calamintha ashei (Lamiaceae) were chemically investigated for natural products with possible allelochemical activities. The chromatographic separations and chemical investigations were guided by germination and radicle growth bioassays performed on seeds of commercial lettuce (Lactuca sativa) and Schizachyrium scoparium, a native grass of the Florida sandhill community. From the dichloromethane extract of aerial parts of C. ericoides, 2', 4'-dihydroxychalcone, the dihydrochalcones angoletin and 2',6'-dihydroxy-4-methoxy-3',5'-dimethyldihydrochalcone, the flavanones 8-methylpinocembrin, 6,8-dimethylpinocembrin and 7-hydroxyflavanone were isolated along with the triterpenes erytrodiol and ursolic acid. Significant inhibition on S. scoparium radicle …
Forest Type And Stand Mapping In Louisiana With Landsat Digital Mss And Tm Data (Aerial Photography, Photointerpretation, Image Analysis, Satellite Data, Thematic Mapper, Multispectral Scanner)., David Lyle Evans
LSU Historical Dissertations and Theses
One Landsat Thematic Mapper (TM), and two Multispectral Scanner (MSS) data sets were digitally analyzed for forest stand and type mapping of the Kisatchie Ranger District, Kisatchie National Forest, Louisiana. Detailed ground-verification maps were produced from interpretation of 1:12,000 and 1:58,000 color-infrared (CIR) aerial photography of nine test compartments in the study area. Stand boundary and soils maps of the study area were obtained and input to the digital geographic information system along with the satellite and ground-verification data. Aerial uniformity and volume information were interpreted and combined with the cover-type data, which included the following categories: open areas, longleaf-slash …