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.
Results
Showing 1 to 16 of 16 for “"Seed maturation"”.
-
Lipid Metabolism in Corn Tissue Culture and Molecular Biology of Soybean Seed Maturation
… the same trend as the lipid content found in the seeds, however there was no consistent lipid pattern observed for the leaf or root callus from these same lines relative to the tissue that it originated from. Therefore corn embryogenic callus provides an ideal tissue to study lipid metabolism. …
-
Investigating the Role of the VAL1 Transcription Factor in Arabidopsis thaliana Embryo Development
Developing oilseeds accumulate oils and seed storage proteins synthesized by the pathways of primary metabolism. Seed development and metabolism are positively regulated at the transcriptional level through the transcription factors belonging to the LAFL regulatory network. The VAL genes encode …
-
The functional characterisation of the XhABFA transcription factor from the resurrection plant Xerophyta humilis
… have arisen by a genetic reprogramming of the seed maturation pathways common to the vast majority of angiosperms. In Arabidopsis thaliana, the activation of seed maturation genes is regulated by the canonical LAFL (LEC1, ABI3, FUS3 and LEC2) network of transcription factors (TFs). However, …
-
Regulation of desiccation tolerance in Xerophyta seedlings and leaves
… 95% of cellular water, a feat only seen in the seeds and pollen of other angiosperms. Xerophyta humilis is a resurrection plant native to Southern Africa that has been the target of previous transcriptomic and proteomic studies into the mechanisms of plant desiccation tolerance. The aim of this …
-
Longterm Approaches to Assessing Tree Community Responses to Resource Limitation and Climate Variation
… of North Carolina. </p><p> First, I use a 19-yr seed rain record from 13 forest plots in the piedmont, transition zone, and mountains to examine how climate-mediated seed maturation and density-dependent seed predation processes increase population reproductive variation in nine temperate tree …
-
Effects of Site Preparation, Seed Germination, and Harvest Maturity on Wiregrass Restoration Efforts at Fort Stewart, GA
… first be leveled and compacted before wiregrass seed can be sown effectively. The first objective of this study was to study the effect of wiregrass seed harvest date on germination success. The second objective of this study was to compare two methods of soil compaction, bulldozer versus …
-
Glutathione Dynamics in Arabidopsis Seed Development and Germination
Seed desiccation and germination have great potential for oxidative stress. Glutathione, one of the most abundant antioxidants in plant cells, is a crucial to the plant's defense mechanisms. To better understand glutathione's responses during these two stages, we examined its dynamics in wildtype …
-
The Role of Temperature in the Seed Germination Ecology of Mountain Springs and Fens
… groundwater. This thesis studies their seed ecology, focusing on the interaction between environmental temperature and germination. To this end we conduct laboratory germination experiments with calcareous spring fen species to characterize the temperature dimension of the germination …
-
Analysis of maturation-specific genes in soybean seeds: Gene structure, desiccation induction and abscisic acid responsiveness
This study describes two maturation (Mat) genes which share some structural similarities with a special group of genes, whose expression can be induced by water stress and also by exogenous abscisic acid (ABA) application. Previous studies have identified a 31-kDa maturation polypeptide (MAT) which …
-
"The Regulation of Pheophorbide a Oxygenase (Pao) in the ""Green Seed"" Problem in Canola and During Leaf Senescence"
Brassica napus, canola, is an important oil seed crop grown extensively in North America and northern Europe with annual yields exceeding seven million metric tons. Under normal field conditions, canola seeds produce chloroplasts during early seed development and then catabolize the photosynthetic …
-
Isolation and characterisation of a LEA-like protein from yeast (Saccharomyces cerevisiae)
… between desiccation tolerance in orthodox seed tissue and an accumulation of LEA proteins suggests that these proteins play an important role in protecting cells from desiccation induced damage. Yeast (Saccharomyces cerevisiae) has been known to desiccate as part of its normal growth cycle …
-
Effects of priming and stage of development on vigor and longevity of muskmelon (Cucumis melo L.) seeds
Muskmelon seeds were harvested at eight stages of development to determine the optimal harvest time for best seed quality and long-term storage. Several types of osmotic and matric priming treatments were investigated to determine the optimal treatment for maximal seed vigor and to test the effects …
-
Caracterización de los genes AtbZIP53 de arabidopsis thaliana y HvbZIP53 de cebada y su participación en la regulación génica durante el desarrollo de la semilla
… in a specific manner. The expression of many seed storage protein genes in cereals relies on transcription factors of the bZIP class, belonging to the maize OPAQUE2 family (C-group in Arabidopsis). Barley BLZ1 and BLZ2, and Arabidopsis AtbZIP10 and AtbZIP25, are implicated in the regulation of …
-
Global transcriptional, post-transcriptional, and translational regulation during soybean seed and seedling development
… at the appropriate levels during soybean seed and seedling developmental stages. To define the developmental shifts in gene expression and begin to understand the gene regulatory networks, high-throughput RNA sequencing (RNA-Seq) was carried out using cotyledons from seven developmental …
-
A waterhemp saga: Seed production, genetics, hybridization, and the creation and discovery of quad-stack individuals
… required for female plants to produce mature seeds after pollination. It was found that some seeds may become viable in as little as 7–9 days after pollination, and that seed dormancy drops if seeds remain on the plant for at least 15–30 days after pollination. These findings could be helpful …