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 69 for “"Meristem"”.
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Meristem regulation in the early divergent land plant Marchantia polymorpha
Meristems are key features of land plant development, enabling post-embryonic organogenesis through precise spatial patterning of cell division and differentiation. Extensive work on flowering plant meristems has revealed gene circuits driving meristem patterning, which are increasingly targeted to …
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Agronomic management of soybean with foliar manganese and apical meristem alterations
… yield. Practices to eliminate the plant apical meristem included applying the herbicide Cobra (2-ethoxy-1-methyl-2-oxoethyl-5-[2-chloro-4-(trifluoromethyl)-phenoxy]-2-nitrobenzoate) to cause a chemical burn, as well as decapitation back to the unifoliate or first trifoliate nodes. Plant …
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A Role for Late Meristem Identity2 in the Reproductive Development of Arabidopsis
… transition is in large part controlled by the meristem identity regulator LEAFY (LFY) and the LFY direct target APETALA1 (AP1 ). The molecular mechanisms by which LFY orchestrates a precise and robust switch to flower formation is not well understood. Here we show that the R2R3 MYB …
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FUNCTIONAL ANALYSIS OF TRANSCRIPTION FACTORS INVOLVED IN REPRODUCTIVE MERISTEM IDENTITY IN ARABIDOPSIS THALIANA
… responsible for the switch from the shoot apical meristem (SAM) to the inflorescence meristem (IM) and are involved in the activation of the floral meristem identity (FMI) genes: LFY, LATE MERISTEM IDENTITY1 (LMI1), APETALA1 (AP1), CAULIFLOWER (CAL), SHORT VEGETATIVE PHASE (SVP) and AGAMOUS-LIKE …
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Investigating the Roles of Three Aintegumenta-Like Genes In Maintenance of Arabidopsis Shoot Meristem Activity
<p>The shoot apical meristem, a small dome-shaped structure at the shoot apex of higher plants, is established during development of the embryo. After germination, the indeterminate activity of the shoot apical meristem is responsible for the initiation of all aboveground parts of the plant. The …
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The developmental transcriptional landscape and organizing function of the sieve element in the root meristem
… as well as the role of these cells in root meristem formation.
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Cell Fate Specification and the Regulation of RNA-dependent DNA Methylation in the Arabidopsis Root Meristem
<p>The Arabidopsis root apical meristem (RAM) is a complex tissue capable of generating all the cell types that ultimately make up the root. The work presented in this thesis takes advantage of the versatility of high-throughput sequencing to address two independent questions about the root …
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REGULATING CYTOKININ METABOLISM DURING INFLORESCENCE MERISTEM DEVELOPMENT TO PROMOTE HIGHER RICE PRODUCTIVITY THROUGH CHANGES ON PLANT ARCHITECTURE
… A transcriptomic analysis of the inflorescence meristem at early developmental stages of the triple mutant osckx3 osckx5 osckx9 revealed a series of uncharacterized differentially expressed genes whose expression patterns might be influenced by cytokinin levels. These genes represent promising …
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A study of the response of the root meristem of maize to acute doses of ionizing radiations
At the commencement of any studies in radiobiology it is necessary to decide on a suitable system for investigation, either animal or plant.
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Effects of Drought on Gene Expression in Maize Reproductive and Leaf Meristem Tissues as Revealed by Deep Sequencing
… watered fertilized ovary (1-2DAP) and basal leaf meristem tissue. The pipeline also identified novel splice junctions - splice variants of previously known gene models and potential novel transcription units. An attempt was also made to exploit the data to understand the drought mediated …
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A study comparing the effects of vincristine with those of ionizing radiation on the root meristem of Vicia faba
Vincristine and vinblastine, two closely related alkaloids are extracted from the Madagaskar Periwinkle, Vinca rosea Linn. They have been shown to be effective oncolytic agents and cause arrest of mitosis at the metaphase stage, similar to that of colchicine andcolcimid. Clinically, vincristine has …
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A study of the response of the root meristem of maize to fractionated and protracted doses of ionizing radiation
… of large chromosomes contained in the root meristem cells, which are particularly conducive to simple cytological analysis. The seedlings also have other attractive features.
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Characterizing the Expression Pattern of miR167-Regulated ZmArf3 and ZmArf30 in Maize Inflorescences
… and development depends on the activity of meristems, pools of stem cells that generate leaves and other organs. Maize (corn) produces two inflorescences, the tassel and ear, which are patterned by a series of branching events that depend on the initiation of axillary meristems. The maize …
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Natural genetic variation and gene expression patterns underlying lateral shoot (tiller) development in barley (Hordeum vulgare L)
… tissues develop from the shoot apical meristem (SAM), including axillary meristems (AXM) from which lateral branches develop. In barley, lateral branches called tillers contribute directly to grain yield and define shoot architecture. Two studies were completed to gain a better …
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The Integration of Metabolite and Hormone Signalling Drives Seedling Development
… whether sucrose and folates influence root meristem activity. Sucrose induced hormone signalling pathways that promote cell division and differentiation. Treatment with SMX perturbed the effect of sucrose on hormone networks that mediate growth, and resulted in a loss of meristem integrity. …
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Confocal and electron microscopy investigations of the plant endoplasmic reticulum–nuclear envelope interface and meristematic cell divisions
… novel mechanisms of division within the root meristem, an area of significant agricultural relevance yet ambiguity due to its size and location. Through Serial Block-Face Scanning Electron Microscopy, root apical meristem cells are shown to experience closed mitosis with the NE remaining …
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DNA Damage responses in plant stem cells
… mutants showing spontaneous PCD in the root meristem, and studied the link between transposon silencing and the ATM/SOG1 pathway. Finally, by characterising responses to Cre‐catalysed recombination in the shoot meristem, I uncovered an unexpected link between the DNA damage response pathway …
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Frameworks for reprogramming early diverging land plants
… were applied to study the gametophytic meristem in Marchantia gemmae. I mapped the expression of several putative candidate homologues for higher plant meristem regulators, performed overexpression and loss-of-function studies for homologues of WUSCHEL, CLAVATA3 and SHOOT MERISTEMLESS. A …
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