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Arabidopsis Pht1; 5 Plays An Integral Role In Phosphate Homeostasis, Aaron P. Smith, Vinay K. Nagarajan, Kashchandra G. Raghothama
Arabidopsis Pht1; 5 Plays An Integral Role In Phosphate Homeostasis, Aaron P. Smith, Vinay K. Nagarajan, Kashchandra G. Raghothama
Faculty Publications
The mobilization of inorganic phosphate (Pi) in planta is a complex process regulated by a number of developmental and environmental cues. Plants possess many Pi transporters that acquire Pi from the rhizosphere and translocate it throughout the plant. A few members of the high-affinity Pht1 family of Pi transporters have been functionally characterized and, for the most part, have been shown to be involved in Pi acquisition. We recently demonstrated that the Arabidopsis Pi transporter, Pht1;5, plays a key role in translocating Pi between tissues. Loss-of-function pht1;5 mutant seedlings accumulated more P in shoots relative to wild type but less …
Potassium, Phosphorus, Or Nitrogen Limit Root Allocation, Tree Growth, Or Litter Production In A Lowland Tropical Forest, S. Joseph Wright, Joseph B. Yavitt, Nina Wurzburger, Benjamin I. Turner, Edmund V.J. Tanner, Emma J. Sayer, Louis S. Santiago, Michael Kaspari, Lars O. Hedin, Kyle E. Harms, Milton N. Garcia, Marife D. Corre
Potassium, Phosphorus, Or Nitrogen Limit Root Allocation, Tree Growth, Or Litter Production In A Lowland Tropical Forest, S. Joseph Wright, Joseph B. Yavitt, Nina Wurzburger, Benjamin I. Turner, Edmund V.J. Tanner, Emma J. Sayer, Louis S. Santiago, Michael Kaspari, Lars O. Hedin, Kyle E. Harms, Milton N. Garcia, Marife D. Corre
Faculty Publications
We maintained a factorial nitrogen (N), phosphorus (P), and potassium (K) addition experiment for 11 years in a humid lowland forest growing on a relatively fertile soil in Panama to evaluate potential nutrient limitation of tree growth rates, fine-litter production, and fine-root biomass. We replicated the eight factorial treatments four times using 32 plots of 40×40 m each. The addition of K was associated with significant decreases in stand-level fineroot biomass and, in a companion study of seedlings, decreases in allocation to roots and increases in height growth rates. The addition of K and N together was associated with significant …
Influence Of Turfgrass Coverage On Nutrient And Pesticide Transport As Affected By Water And Sediment Displacement During Surface Runoff, Steven Michael Borst
Influence Of Turfgrass Coverage On Nutrient And Pesticide Transport As Affected By Water And Sediment Displacement During Surface Runoff, Steven Michael Borst
LSU Doctoral Dissertations
Turfgrass systems such as roadsides, home lawns, and golf course roughs can vary in surface coverage. Nutrient and pesticide applications applied to these systems may pose an increased risk to adjacent water supplies from surface runoff. Therefore the objectives of this research were: 1) determine the effect surface coverage has on nutrient, pesticide, and sediment runoff and, 2) evaluate the impact of pesticide solubility on runoff losses at varying turfgrass coverages. Surface runoff research commenced in 2010 and 2011 with experimental units consisting of six turfgrass coverages (0, 25, 50, 75, and 100%) and untreated bare soil. Coverages each received …
Development Of A Total Nutrient Treatment System For Alligator And Dairy Parlor Wastewater Using Hydrated Lime And Organic Bacterial Growth Media, Troy Francis Davis
Development Of A Total Nutrient Treatment System For Alligator And Dairy Parlor Wastewater Using Hydrated Lime And Organic Bacterial Growth Media, Troy Francis Davis
LSU Master's Theses
Over application of phosphorus and the loss of ammonia-nitrogen to runoff and volatilization have resulted in the buildup of phosphorus in agricultural top soils around the world, and especially in the United States. Over the past few decades, raising livestock has trended towards the development of the Confined Animal Feeding Operations (CAFO’s) which produce large volumes of wastes that need to be treated before being land applied. Nutrient treatment systems have typically focused on one nutrient singularly: either nitrogen or phosphorus. In order to develop a total nutrient system a phosphorus and nitrogen system had to be developed and evaluated …
The Effect Of Habitat Change On Nutrient Removal In The Atchafalaya River Basin, Louisiana, Amy E. Scaroni
The Effect Of Habitat Change On Nutrient Removal In The Atchafalaya River Basin, Louisiana, Amy E. Scaroni
LSU Doctoral Dissertations
The Mississippi and Atchafalaya rivers are the major sources of freshwater and nutrients to the Gulf of Mexico. Increased nutrient loads from these rivers exacerbate eutrophication in coastal receiving waters and contribute to the large area of hypoxia that develops seasonally in the Gulf. Levees along the Mississippi River have reduced contact between the river and the historic floodplain; this limits the ability of floodplain wetlands to naturally mitigate excess nutrients. However, the Atchafalaya River diverges from the Mississippi 217 km from the Gulf and enters a large river floodplain with a widely spaced levee system. This enhances the ability …