Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 244 for “"Biology, Plant Physiology"”.
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Isoflavonoid induction and nitrogen assimilation in AM colonized red clover
… results indicate that the colonized red clover plants, with 22% to 37% of AM root colonization, had enhanced shoot height as well as increased shoot and root dry masses. Co-inoculation with Rhizobium enhanced the growth parameters more than inoculation with either microsymbiont alone. The …
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Characterization and molecular cloning of sos3: A gene important for salt tolerance and potassium nutrition in higher plants
… in salt response and salt tolerance in higher plants. During my dissertation research, the sos3-1 mutant was isolated and characterized. The mutant plants are hypersensitive to Na⁺ and unable to grow with low K⁺. Increased Ca²⁺ levels can partially suppress the growth defect of the mutant …
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Competition for Nitrogen Between Eastern Black Nightshade and Fresh Market Tomatoes
… market tomatoes and SOLPT, which included two plant populations, and four N treatments. Overall, tomato grew taller faster, and gained more shoot mass than SOLPT regardless of N rate or population density. When grown together both species produced taller plants, with less fresh shoot mass at in …
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Applied Biotechnology for in Vitro Production of Carica Papaya L
… and increased the percentage developing into plantlets. A papain-like enzyme was detected in the somatic embryo cultures both under light or in darkness, but enzyme activity was enhanced in a liquid system under 40$\mu$mol m$\rm\sp{-2}s\sp{-1}$ irradiance. Artificial seeds were developed by …
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The Use of Tissue Culture to Separate Apple (Malus Sp.) Chimeras Into Their Constituent Genotype(s) and to Induce Anthocyanin Production
… for both control and tissue culture-derived plants, none of the variation exceeded that observed among control trees. We conclude that 'Gala' and 'Royal Gala' showed very little somaclonal variation for the morphological and reproductive traits we studied, suggesting tissue culture trees can …
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Purification and Characterization of 5'-Methylthioadenosine Nucleosidase From Avocado and Tomato
Activities of MTA nucleosidase and 5-methylthioribose kinase were determined in ripening 'Rutgers' and non-ripening ' rin' and 'nor' tomatoes during fruit development. The effects of wounding on MTA content and MTA nucleosidase activity were also assessed. Results suggested that the methionine …
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Isolation and Characterization of the Soybean Major Latex Homologue Msg, and Analysis of Its Pod -Specific Promoter
… induction experiment on transgenic Arabidopsis plants did not show the Msg promoter to be induced after infiltration with Pseudomonas syringae. However, in soybean pods, the Msg transcript was localized by whole mount in situ hybridization to the mid pericarp layer, a continuous single cell …
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Electron Transport in Photosynthesis: Proteins and Pathways
Synechocystis 6803 cytochrome cM were purified and its physical and structural characteristics investigated. Highly purified cytochrome cM was obtained in oligomeric forms. Our spectroscopy data indicate that the 6th axial ligand for cytochrome cM is not likely to be Met residue.
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Role of N in Controlling Kernel Growth in Maize
… by affecting the supply of photoassimilates. Plants grown in the field with 0 kg N ha$\sp{-1}$ (N-deficient) and 180 kg N ha$\sp{-1}$ (N-sufficient) were stem infused at silking with 240 mg of N, or 15 g of sucrose, or a combination of both (N + sucrose). Control plants were stem-infused with …
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Plant Activation of Bicyclic Aromatic Amines, Benzidine and 4-Aminobiphenyl
… and used in industrial manufacturing. Using the plant cell/microbe coincubation assay, this study showed that benzidine and 4-ABP were activated by plant peroxidase into frameshift- and base pair substitution-mutagens by plant-activation. Bacterial acetyl O-acetyltransferase as well as human …
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Agronomic and Physiological Evaluation of Sethoxydim and Isoxaflutole for Weed Management in Corn
It is imperative to develop a knowledge base for new technologies available for weed management. This information is required to achieve a full understanding of how the technology can be optimized to benefit weed management systems as well as elucidate any negative attributes of the technology. …
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Molecular, Genetic, and Agronomic Evaluation of Wp and Wp-M in Soybean
… to quantitative trait loci (QTL) responsible for plant morphology. The influence of anthocyanin, protein biosynthesis, and morphological traits by wp and wp-m is a unique occurrence that has not been reported in other plant species.
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Identification and Characterization of a Calmodulin -Binding Protein Related to a Family of ATPases Involved in Cell Division and Membrane Fusion
… a beta-glucuronidase reporter gene in transgenic plants demonstrated that CIP111 is expressed in young anthers, developing embryos, root tips, and lateral roots. An unusual characteristic of higher plants is that they express a variety of CaM isoforms. To explore the functional differences of …
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Investigating Cytochromes in Photosynthetic Electron Transport in Cyanobacteria
Inhibitor binding sites in the cytochrome bf complex of Synechococcus 7002 was modified by site-directed mutagenesis. The aim of this study was to identify the amino acid residues in cytochrome b6 that participate in plastoquinol and inhibitor binding at the plastoquinol oxidation site of the …
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Circadian, Light and Low Temperature Regulation of Nitrate Reductase in Tomato
… would cause is likely to be detrimental to the plant.
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High Light and Low Temperature Effect on D1 Synthesis and Turnover in the Chilling Sensitive Plant Lycopersicun Esculentum
Photoprotective mechanisms of a plant can become overwhelmed when high light is combined with low temperature. In the chilling sensitive plant tomato (Lycopersicun esculentum var. Mill Floramerica), these combined stresses were found to cause a decrease in de novo synthesis of D1, a component of …
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Effects of Changes of Redox Properties of the Chloroplast ATP Synthase in Arabidopsis
… by transformating wild type (Columbia ecotype) plants with the site-directed mutated gene constructs of gamma-subunit. The transgenes were overexpressed behind a constitutive 35S promoter compared with the endogenous gamma-subunit gene. In the isolated mutant chloroplasts, the high ATPase …
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WHO: A Novel Wuschel-Like Homeodomain Transcription Factor in Arabidopsis
… fate in shoot and floral meristems among several plant species. This novel homeobox gene, designated as W&barbelow;USCHEL-LIKE H&barbelow;OMEOPROTEIN O&barbelow;VEREXPRESSION (WHO), encodes a new WUS-like homeodomain protein of 182 amino acids. There are four single nucleotide polymorphisms found …
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Molecular and Genomic Analysis of Nitrogen Regulation of Amino Acid Permease I (Aap1) in Arabidopsis
… loading of amino acids and finally influence plant nitrogen status.
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Sex, Diversity, and Differentiation Within and Between Populations of an Aquatic Hyphomycete
Aquatic hyphomycetes contribute to energy flow and nutrient spiraling in rivers by making energy and fixed carbon in autumn-shed leaves available to aquatic invertebrates. These fungi are haploid, predominantly or exclusively asexual, have restricted dispersal abilities, and experience yearly …
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