Topic
Phosphorus
About: Phosphorus is a research topic. Over the lifetime, 53120 publications have been published within this topic receiving 939731 citations. The topic is also known as: element 15 & P.
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TL;DR: The over-expression of type I H+-pyrophosphatases appears to be a generally applicable technology to help alleviate agricultural losses in low-phosphorus tropical/subtropical soils and to reduce phosphorus runoff pollution of aquatic and marine environments resulting from fertilizer application.
Abstract: Plants challenged by limited phosphorus undergo dramatic morphological and architectural changes in their root systems in order to increase their absorptive surface area. In this paper, it is shown that phosphorus deficiency results in increased expression of the type I H+-pyrophosphatase AVP1 (AVP, Arabidopsis vacuolar pyrophosphatase), subsequent increased P-type adenosine triphosphatase (P-ATPase)-mediated rhizosphere acidification and root proliferation. Molecular genetic manipulation of AVP1 expression in Arabidopsis, tomato and rice results in plants that outperform controls when challenged with limited phosphorus. However, AVP1 over-expression and the resulting rhizosphere acidification do not result in increased sensitivity to AlPO4, apparently because of the enhancement of potassium uptake and the release of organic acids. Thus, the over-expression of type I H+-pyrophosphatases appears to be a generally applicable technology to help alleviate agricultural losses in low-phosphorus tropical/subtropical soils and to reduce phosphorus runoff pollution of aquatic and marine environments resulting from fertilizer application.
174 citations
TL;DR: It was concluded that the steel slag may be an efficient adsorbent to remove phosphate both from solution and wastewater due to their low cost and high capability.
174 citations
TL;DR: In this article, a comparison between nitrogen and phosphorus removal rates by area-based and biomass-based calculation using various kinds of aquatic plants (18 emergent and 3 floating plants) was made to investigate the removal of high nutrient contents from polluted water.
174 citations
TL;DR: This study evaluated the possibility of anoxic phosphorus release or aerobic/anoxic phosphorus uptake tests for sludge characterization and found a comparison of phosphorus uptake under aerobic and anoxic conditions leads to a straightforward characterization of the microbial population in the phosphorus removing organisms.
174 citations
TL;DR: The mean body size of cladocerans was not a significant additional variable in a TP–Chl a model based on the seasonal mean values in the ET lakes, but cladocerran body size was a significant factor in 13 lakes of the Indian River district of New York.
Abstract: Simultaneous observations were made of total phosphorus (TP), chlorophyll a (Chl a), and zooplankton biomass and community structure at 12 sites in the Eastern Townships (ET) region of Quebec to de...
173 citations