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Comparison of the Effects of Wet N Deposition (NH4Cl) and Dry N Deposition (NH3) on UK Moorland Species
Increases in N deposition (wet and dry) have been associated with a decline in seminatural plant communities, adapted for growth on nutrient poor soils in the UK and Europe. The impacts of N deposition applied...
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Article
Comparison of the Effects of Wet N Deposition (NH4Cl) and Dry N Deposition (NH3) on UK Moorland Species
Increases in N deposition (wet and dry) have been associated with a decline in semi-natural plant communities, adapted for growth on nutrient poor soils in the UK and Europe. The impacts of N deposition applie...
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Article
Seasonal variability of apoplastic NH4 + and pH in an intensively managed grassland
The stomatal compensation point of ammonia (χs) is a major factor controlling the exchange of atmospheric ammonia (NH3) with vegetation. It is known to depend on the supply of nitrogen and to vary among plant spe...
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Article
Root exudate components change litter decomposition in a simulated rhizosphere depending on temperature
The release of root exudates into the rhizosphere is known to enhance soil biological activity and alter microbial community structure. To assess whether root exudates also stimulated litter decomposition, in ...
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Article
Vascular plant success in a warming Antarctic may be due to efficient nitrogen acquisition
Nitrogen availability is frequently a key factor limiting plant growth, even when other conditions are favourable. Research demonstrates that via a short circuit in the terrestrial nitrogen cycle, Antarctic ha...
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Article
Oligopeptides Represent a Preferred Source of Organic N Uptake: A Global Phenomenon?
Over the past 20 years, our understanding of soil nitrogen (N) cycling has changed with evidence that amino acids are major substrates for both soil microorganisms and plants. However, the recent discovery tha...
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Article
Open AccessPlant acquisition and metabolism of the synthetic nitrification inhibitor dicyandiamide and naturally-occurring guanidine from agricultural soils
There is increasing interest and use of nitrification inhibitors (NI) in agroecosystems, yet little is known of their fate in planta. Residues of the organic, N-rich NI, dicyandiamide (DCD), have been found in mi...
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Article
Open AccessThe mobility of nitrification inhibitors under simulated ruminant urine deposition and rainfall: a comparison between DCD and DMPP
Urine patches within pasture soils are hotspots for nitrogen (N) cycling and losses, where nitrification inhibitors (NI) offer a means of reducing such losses. Within urine influenced soil, more research has b...
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Article
Transformations in DOC along a source to sea continuum; impacts of photo-degradation, biological processes and mixing
Peatlands export significant amounts of dissolved organic carbon (DOC) to freshwaters, but the quantity of DOC reaching marine environments is typically less than the input to the fluvial system due to process...
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Article
Open AccessWarming alters competition for organic and inorganic nitrogen between co-existing grassland plant species
Grass species may acquire different forms of nitrogen (N) to reduce competition for the same resources. Climate change influences the availability of soil N and is therefore likely to cause shifts in N forms a...
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Article
Rewriting yeast central carbon metabolism for industrial isoprenoid production
Yeast central carbon metabolism has been engineered to achieve a more efficient isoprenoid biosynthesis pathway, an advance that brings commodity-scale production of such compounds a step closer.
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Article
Open AccessDifferent ways in which CO2 can be released during the turnover of roots in soil
Here, we investigated how root age and mode of death influenced their subsequent turnover and rate of C loss from soil. Young white-coloured and older pigmented roots of Cistus monspeliensis were excised (to simu...
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Article
Open AccessCrop residues exacerbate the negative effects of extreme flooding on soil quality
Extreme flood events are predicted to have a negative impact on soil quality. Currently, there is a lack of information about the effect of agricultural practices on soil functioning and microbial processes un...
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Article
Open AccessMethodological bias associated with soluble protein recovery from soil
Proteins play a crucial role in many soil processes, however, standardised methods to extract soluble protein from soil are lacking. The aim of this study was to compare the ability of different extractants to...
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Article
Open AccessStoichiometric constraints on the microbial processing of carbon with soil depth along a riparian hillslope
Soil organic matter (SOM) content is a key indicator of riparian soil functioning and in the provision of ecosystem services such as water retention, flood alleviation, pollutant attenuation and carbon (C) seq...
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Article
Plant organic N uptake maintains species dominance under long-term warming
There is ample experimental evidence for shifts in plant community composition under climate warming. To date, however, the underlying mechanisms driving these compositional shifts remain poorly understood.
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Article
Experimental strategies to measure the microbial uptake and mineralization kinetics of dissolved organic carbon in soil
Soil organic matter turnover rates are typically estimated from mass loss of the material over time or from on rates of carbon dioxide production. In the study, we investigated a new way to characterize the co...
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Article
Seasonality is more important than forest type in regulating the pool size and composition of soil soluble N in temperate forests
Soil soluble nitrogen (N) is crucial to the N nutrition and productivity of plants. Consequently, understanding the factors that affect its pool size and composition is of considerable importance. Here, six ty...
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Article
Open AccessDo plants use root-derived proteases to promote the uptake of soil organic nitrogen?
The capacity of plant roots to directly acquire organic nitrogen (N) in the form of oligopeptides and amino acids from soil is well established. However, plants have poor access to protein, the central reservo...
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Article
Open AccessCompetition for S-containing amino acids between rhizosphere microorganisms and plant roots: the role of cysteine in plant S acquisition
Plant S deficiency is common, but the role of S-containing amino acids such as cysteine in plant S uptake is unknown. We applied 14C-, 35S-, 13C-, and 15N-labelled cysteine to wheat and oilseed rape rhizospheres ...