How does nutrient limitation affect expression of assimilatory genes within a photosynthetic microbial mat community in Yellowstone National Park? Microbial mat communities that inhabit hot springs in Yellowstone National Park have been studied for their biodiversity, energetics and evolutionary history, yet little is know about how these communities cope with nutrient limitation. In the present study the changes in assimilatory gene expression levels for nitrogen (nrgA), phosphorus (phoA), and iron (yusV) were measured under various nutrient enrichment experiments. While results for nrgA and phoA were inconclusive, results for yusV showed an increase in expression with the addition of N and Fe. This is the first data that shows the impact of nutrients on siderophore uptake regulation in hot spring microbes.autThorne, MichelethsElser, James JdgcTouchman, JeffreydgcStout, ValeriepblArizona State UniversityengPartial requirement for: M.S., Arizona State University, 2012Includes bibliographical references (p. 22-25)Field of study: Biologyby Michele Thornehttps://hdl.handle.net/2286/R.I.1594600Masters ThesisAcademic thesesv, 25 p. : ill. (some col.)113584695561630349033151380adminIn CopyrightAll Rights Reserved2012TextMicrobiologyNutrient LimitationMicrobial mats--Yellowstone National Park.Microbial matsMicrobial ecology--Yellowstone National Park.Microbial EcologyPhotosynthetic bacteria--Nutrition--Yellowstone National Park.Photosynthetic bacteria