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 37 for “"gibberellin"”.
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Effects of gibberellin on seedlings on nine forest-tree species
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Forestry, 1958
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Einfluss von Gibberellin auf den Gravitropismus der Wurzel durch Regulation der PIN-Stabilität
Auxin und Gibberellin zählen beide zu den klassischen Wachstumshormonen. Da sie ähnliche Wirkbereiche in der Pflanze abdecken, ist eine Vernetzung der beiden Hormone anzunehmen. In vorangegangenen Studien wurde ein direkter Einfluss von Auxin auf die GA-Biosynthese und GA-Perzeption nachgewiesen. …
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The relation of gibberellin to the cold requirement of Lilium longiflorum Thunb., cv. Ace
Thesis (M.S.)--Michigan State University. Dept. of Horticulture, 1969
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The Control of Spore Germination in Anemia Phyllitidis (L.) Swartz and Other Ferns
… In one family of ferns, the Schizaeaceae, the gibberellins overcome this light requirement and induce dark-germination. Fern gametophytes produce antheridium-inducing substances. The Anemia substance, antheridogen-B, is demonstrated to induce germination in two genera of the Schizaeaceae, …
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Regulation of Development of the Storage Root of Sugarbeet
… cambial activity in sugarbeet, the role of the gibberellins in cell division and expansion has been studied. Analyses of endogenous gibberellin-like substances of sugarbeet and mangold shoots and storage roots through the vegetative developmental period have revealed that the activity of the …
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An evaluation of the rate of reproduction of the two spotted spider mite, Tetranychus telarius (L.), reared on gibberellin treated bean plants
Thesis (M.S.)--Michigan State University of Agriculture and Applied Science. Dept. of Entomology, 1958
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Investigating the evolution of cytochromes P450 involved in GA biosynthesis
… ent-copalyl diphosphate synthase is required for gibberellin phytohormone biosynthesis. This has provided the basis for evolution of a functionally diverse enzymatic family. A bifunctional diterpene synthase was characterized from the lycophyte Selaginella moellendorffii . The structure of its …
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Phytohormones and the Culture of Agaricus bisporus (Lange) Pilat
Addition of synthetic phytohormones (auxin, gibberellin and cytokinin) to Agaricus bisporus culture matte promoted mycelial growth significantly at concentrations of 16° - 107 M. Most of the tested phytohormones were more effective in growth promotion in liquid culture rather than on semi-solid …
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Characterization of sugar-insensitive mutants and analysis of sugar-regulated gene expression in Arabidopsis thaliana
… the phytohormones abscisic acid, ethylene, and gibberellin have been undertaken. Sugar-insensitive mutants were isolated based on their ability to form true leaves and expanded cotyledons in the presence of high concentrations (0.27 M to 0.34 M) of sucrose or glucose. The sis3 and sis6 mutants …
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REGULATION OF GROWTH AND GRAVITROPISM IN THE PEANUT GYNOPHORE
… growth and gravitropism of the peanut gynophore. Gibberellin and auxin were found to be important in regulating growth and gravitropism of gynophores in situ. Endogenous auxin levels appeared to be sub-optimal as low concentrations of applied IAA caused them to bend away from the point of …
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The Control of the Root to Shoot Ratio of Radish (Raphanus sativus L.)
… Analysis of indol-3yl-acetic acid (lAA) and gibberellin levels in radish through its vegetative cycle revealed that shoot hormone levels, initially high, declined with time to become lower than the levels in the root. Thus, the ratio of shoot to root hormone content changed from a high to a …
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Field and laboratory investigations on the efficacy, selectivity, and action of the herbicide clomazone
… (Zea mays L.) to clomazone and interactions of gibberellin with clomazone on normal corn were examined. The dwarf mutant displayed greater tolerance to clomazone than normal corn. Growth measurements suggested that gibberellin was antagonistic with clomazone.
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The molecular basis for the initiation of fruit development and parthenocarpy
… can also be induced artificially with cytokinin, gibberellin or auxin plant growth regulators applied to anthesis pistils. This thesis describes genetic research using Arabidopsis as a model plant to identify integral mechanisms that control parthenocarpy and the initiation of fruit development. …
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Genetic engineering of sorghum and switchgrass for improved biofuel production
… we demonstrated that expression of the Zea mays gibberellin 20-oxidase (ZmGA20ox) cDNA in switchgrass improved biomass production. Under greenhouse conditions, selected transgenic plants exhibited longer leaves, internodes and tillers, which resulted in 2-fold increased biomass. This is the first …
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Influence of hormonal chemicals and genotypes on fruit growth of Lycopersicon esculentum Mill
… of 0.125mM βNOA, and 1µM, 10µM, and 100µM gibberellin A₃ had no significant effect on ovary diameter at anthesis or final fruit diameter. A significant positive correlation was also shown between ovary diameter at anthesis and final fruit diameter of βNOA treated plants. Among the twelve …
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