7 Result(s)
within
Paul W. Hill
Plant Sciences
-
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...
-
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 ...
-
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...
-
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...
-
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...
-
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.
-
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...
