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Full-Text Articles in Life Sciences
Lorelei Localization And Ovule Ultrastructure In Arabidopsis Thaliana, Juleen May Dickson
Lorelei Localization And Ovule Ultrastructure In Arabidopsis Thaliana, Juleen May Dickson
Theses and Dissertations
Communication between the male and female gametophyte is vital to successful fertilization during sexual reproduction in plants. One of the proteins known to be important for communication between the male and female gametophyte is LORELEI (LRE). Several studies have shown that there are defects in pollen tube guidance and synergid degeneration, however this is the first study that shows that cell wall thickness in the female gametophyte may also be affected. Previous confocal studies have documented that LRE is present both in the filiform apparatus and found in puncta throughout the cytoplasm. This study confirmed this, but our studies suggest …
Interactions Between The Organellar Pol1a, Pol1b, And Twinkle Dna Replication Proteins And Their Role In Plant Organelle Dna Replication, Stewart Anthony Morley
Interactions Between The Organellar Pol1a, Pol1b, And Twinkle Dna Replication Proteins And Their Role In Plant Organelle Dna Replication, Stewart Anthony Morley
Theses and Dissertations
Plants maintain organelle genomes that are descended from ancient microbes. Ages ago, these ancient microbes were engulfed by larger cells, beginning a process of co-evolution we now call the endo-symbiotic theory. Over time, DNA from the engulfed microbe was transferred to the genome of the larger engulfing cell, eventually losing the ability to be free-living, and establishing a permanent residency in the larger cell. Similarly, the larger cell came to rely so much on the microbe it had engulfed, that it too lost its ability to survive without it. Thus, mitochondria and plastids were born. Nearly all multicellular eukaryotes possess …
Cell Wall Mutants In Arabidopsis Thaliana, Christy Jane Moore
Cell Wall Mutants In Arabidopsis Thaliana, Christy Jane Moore
Theses and Dissertations
Plant cell walls are versatile structures, playing important roles in communication, defense, organization and support. The importance of each of these functions varies by cell type, with specialized cells often utilizing one or two functions more than others. Trichomes, or leaf hairs, and hypocotyl cells for instance, exhibit distinct cell wall characteristics. Trichomes have developed very thick cell walls with several raised structures, known as papillae, on their surfaces. It is believed that these cells function in defense against predators, making it difficult to crawl on the leaf surface, and in protection against ultra violet radiation, through refraction of light …