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 8 of 8 for “"tobacco seedlings"”.
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Influence of Seed Treatment on Tobacco Mosaic Virus Incidence in Tobacco Seedlings and Virus Distribution in Greenhouse Transplant Production
Tobacco mosaic virus (TMV) is an economically important pathogen that has been studied for over one hundred years. Seedlings, seed coats, and nutrient solution were assayed for the presence of the virus and seed treatments were tested on seeds. Double antibody sandwich enzyme-linked immunosorbent …
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Ecology and Management of Pythium species in Float Greenhouse Tobacco Transplant Production
… are common in the greenhouse production of tobacco transplants and can cause up to 70% seedling loss in hydroponic (float-bed) greenhouses. However, the symptoms and consequences of Pythium diseases are often variable among these greenhouses. A tobacco transplant greenhouse survey was …
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Influence of ethephon on growth and flowering of flue-cured tobacco
Tobacco (<i>Nicotiana tabacum</i> L.) leaf initiation stops when floral induction is completed. Floral induction (an internal biochemical change which signals development of flowers) can occur prematurely, during the pre- and/or post-transplant environment. Plants which flower prematurely have few …
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A Functional Analysis of microRNAs in Nicotiana tabacum
… Arabidopsis. Nicotiana tabacum, or cultivated tobacco, is an important economic, agricultural, and research crop that provided approximately $4.4 billion dollars to the United States economy in 2007. Although much genetic research has already been dedicated to tobacco, hardly any research …
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Studies of the resistance of tobacco to a second attack of Peronospora tabacina adam
This study is concerned with the resistance of tobacco seedlings to a second attack of downy mildew caused by Peronospora tabacina Adam. Observations were made on the development and duration of resistance following recovery of tobacco seedlings from downy mildew. The duration of the period of …
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Identification, Characterization, and Abiotic Stress Analysis of microRNAs in Nicotiana tabacum
… apple, and switchgrass. In this project, using tobacco as my model organism, I first employed genome survey sequence analysis to identify conserved miRNAs in tobacco and then investigated their expression profiles during different growth conditions. My results identified 259 potentially …
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Induced disease resistance elicited by acibenzolar-S-methyl and plant growth-promoting rhizobacteria in tobacco (Nicotiana tabacum L.)
… (PGPR), was evaluated on two-to-three types of tobacco in greenhouse and field studies. Tobacco mosaic virus (TMV) local lesion assays monitored induction and maintenance of ASM-induced SAR over a 21 day period via proportional reduction in the number of TMV local lesions between an untreated …
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Inoculum densities of Thielaviopsis basicola in tobacco fields in Virginia, and the relationship of inoculum density to the severity of black root rot and growth of tobacco
… basicola, cause of black root rot of tobacco, from soil. TB-CEN medium contains etridiazol and nystatin to inhibit the growth of undesired fungi, and unautoclaved extract from carrot to selectively enhance for the growth of T. basicola. Inoculum and/or population densities of T. …