Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Life Sciences
Examining The Evolutionary Constraints Of Gene Expression Levels In S. Cerevisiae, Andrea Janelle Jackson
Examining The Evolutionary Constraints Of Gene Expression Levels In S. Cerevisiae, Andrea Janelle Jackson
Theses and Dissertations
It has been widely reported that some genes are expressed at a higher level than others. However, it has not been shown whether each gene is expressed consistently between studies and at the same level compared to all other genes. Here, we examined six RNA-seq datasets and found that the mRNA level of each gene is indeed consistent relative to all other genes. This result implies that there are evolutionary pressures that drive genes to maintain either low or high expression. In order to identify these pressures, we compared gene expression level to the features of each gene (or associated …
The Path To Understanding Salt Tolerance: Global Profiling Of Genes Using Transcriptomics Of The Halophyte Suaeda Fruticosa, Joann Diray Arce
The Path To Understanding Salt Tolerance: Global Profiling Of Genes Using Transcriptomics Of The Halophyte Suaeda Fruticosa, Joann Diray Arce
Theses and Dissertations
Salinity is a major abiotic stress in plants that causes significant reductions in crop yield. The need for improvement of food production has driven research to understand factors underlying plant responses to salt and mechanisms of salt tolerance. The aim of improving tolerance in traditional crops has been initiated but most crops can only tolerate a limited amount of salt in their systems to survive and produce biomass. Studies of naturally occurring high salt-tolerant plants (halophytes) are now being promoted for economic interests such as food, fodder or ecological reasons. Suaeda fruticosa, a member of the family Chenopodiaceae, belongs …
Independent Origination Of Floral Zygomorphy, A Predicted Adaptive Response To Pollinators: Developmental And Genetic Mechanisms, Ghadeer Bukhari, Wenheng Zhang
Independent Origination Of Floral Zygomorphy, A Predicted Adaptive Response To Pollinators: Developmental And Genetic Mechanisms, Ghadeer Bukhari, Wenheng Zhang
Theses and Dissertations
Observations of floral development indicate that floral organ initiation in pentapetalous flowers more commonly results in a medially positioned abaxial petal (MAB) than in a medially positioned adaxial petal (MAD), where the medial plane is defined by the stem and the bract during early floral development. It was proposed that the dominant MAB petal initiation might impose a developmental constraint that leads to the evolution of limited patterns of floral zygomorphy in Asteridae, a family in which the floral zygomorphy develops along the medial plane and results in a central ventral (CV) petal in mature flowers. Here, I investigate whether …