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 222 for “"dormancy"”.
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Preserving spore dormancy
Many Firmicutes survive harsh conditions by forming dormant, resistant endospores that later resume growth through germination. Because germination abolishes spore resistance, developing spores must avoid responding to germinants too early. This thesis examines how sporulating bacteria prevent …
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StCKP and potato tuber dormancy
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Overcoming Summer Dormancy of Boxwood
… of this work was to determine if summer dormancy of boxwood could be removed either through nutritional or hormonal means. Buxus sempervirens L. "Suffruticosa", B. sempervirens "Vardar Valley", and B sinica var. insularis (Nakai) "Justin Brouwers" were used for these studies. In the …
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Dormancy in spatial population models in random environments
… introduces spatial models for populations with dormancy in random environments. The models are formulated as continuous-time two-type branching random walks, where individuals switch between active and dormant states. We consider two scenarios: one where the switching rates are influenced by the …
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Identifying Epigenetic Regulators Of Tumor Dormancy And Recurrence
… their clinical importance, the biology of tumor dormancy and recurrence are poorly understood. Using a HER2 inducible mouse model of breast cancer, we performed a CRISPR screen to identify novel epigenetic regulators of tumor dormancy and recurrence. We identified HDAC10 and KMT2E as …
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Cytokinin interconversion by StCKP1 controls potato tuber dormancy
… for human consumption. Since the period of tuber dormancy before tuber buds sprout is usually shorter than the optimal market storage period, control of sprouting is essential. To prolong dormancy, tubers are either stored at low temperatures and/or are treated with chemical sprout inhibitors, the …
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Inflammation triggers Zeb1-dependent escape from tumor dormancy
… outgrowth. To model metastatic cellular dormancy, I used a dormant subpopulation of cells (D2A1-d) that were enriched for in vivo from the highly metastatic carcinoma cell line D2A1, that was derived from spontaneous murine mammary tumor. The ability of the EMT program to awaken dormant …
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Seed dormancy and germination of northern red oak
… Freshly harvested northern red oak seed exhibit dormancy that may be broken by stratification or pericarp removal. In this research, germination, seedling growth and adenylate energy metabolism of northern red oak with pericarp removed and intact was measured during stratification (5C) for two …
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Causes and consequences of prolonged dormancy: Why stay belowground?
<p>Prolonged dormancy is a stage in which mature plants fail to resprout during the growing season and instead remain alive belowground. Though it is relatively common, the causes and consequences of this intriguing stage have remained elusive. In this dissertation, I investigate the causes and …
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Causes and consequences of prolonged dormancy: Why stay belowground?
<p>Prolonged dormancy is a stage in which mature plants fail to resprout during the growing season and instead remain alive belowground. Though it is relatively common, the causes and consequences of this intriguing stage have remained elusive. In this dissertation, I investigate the causes and …
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Dormancy and sprout control in root and tuber crops
Research objectives were to study dormancy/sprout control in potato and sweetpotato, and to identify novel sprout control strategies. Consistent with sprout stimulation by gibberellins (GAs) in potato, 10 mM GA3 enhanced sprout length and number in sweetpotato roots and sprout growth was decreased …
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Seed morphology, dormancy and germination of South-West Australian Ericaceae
… including many species with deep intractable dormancy. A better understanding of seed biology and species specific dormancy, and germination mechanisms is required to overcome these difficulties. Land clearing, salinity and disease has resulted in over 125 species within 15 genera being listed …
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Growth hormones and their relationship to seed dormancy in Quercus
Northern red oak (Q. rubra L.) seeds were dormant and required 10 weeks of moist, cold stratification before a large percentage of the seeds would germinate. White oak (Q. alba L.) seeds were not dormant and germinated immediately upon falling from the mother tree. A transfer of mass from the …
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ROLE OF SPARC IN DORMANCY OF PROSTATE CANCER IN THE BONE
… role of tumor microenvironment in regulation of dormancy and recurrence. Indolent cell was found to secrete a high level of SPARC which significantly stimulated the expression of BMP7 in bone marrow stromal cells (BMSC). The secreted BMP7 then kept cancer cells in a dormant state by inducing …
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Recovering from Dormancy: Fixation of CSM6-Inducing Spacers in the Bacterial Population
… results in mass RNA degradation which triggers dormancy in the infected cell. How dormancy protects from infection and whether it can be relieved is not known. Abortive infection mechanisms of immunity are common in prokaryotes and confer defense at the population level – infected cells will …
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Ecology of wild radish (Raphanus raphanistrum) : crop-weed competition and seed dormancy.
Field experiments investigating the nature and extent of interference in monocultures and mixtures of wild radish and wheat were conducted in 2003 and 2004 at Roseworthy, South Australia. Intraspecific and interspecific interfenernce between wild radish and wheat was investigated in the field using …
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Studies on the Plasticity of Dormancy and on Aging in Switchgrass Seeds
The dormancy of switchgrass (Panicum virgatum L.) seeds may be broken by a variety of treatments, including after-ripening and stratification. This study was conducted to investigate and characterize more systematically factors affecting both after-ripening and stratification effectiveness, and the …
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A Theoretical Model Of Breast Tumor Metastases In The Context Of Tumor Dormancy
… cells into the circulatory system, tumor cell dormancy period at the distant site, and metastasis growth. The flexible model structure allows for the quantification of adjuvant treatment benefits based on the heterogeneity of metastasis process. To solve the problem of modeling two …
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Silencing Seed Dormancy Genes to Mitigate Risk of Transgene Flow to Weedy Rice
… ecological and economic consequences. Seed dormancy (SD) is a key adaptive trait that distributes germination over time, resulting in weed persistence in agroecosystems. Thus, silencing major genes controlling SD would reduce the adaptive fitness of weeds. SD-enhancing genes cloned from …
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