Fig. 3: Particulate inorganic phosphorus (Pi) generated from ribonucleotides reacted with natural samples. | Nature Communications

Fig. 3: Particulate inorganic phosphorus (Pi) generated from ribonucleotides reacted with natural samples.

From: Unraveling iron oxides as abiotic catalysts of organic phosphorus recycling in soil and sediment matrices

Fig. 3

For (a) sediment and (b) soil samples: (top) Contribution of abiotic reactivity (gray) and (bottom) distribution of particulate organic phosphorus (Porg; brown) and particulate Pi (pink) before (reference, ref) and after 7 d reaction with Porg as adenosine triphosphate (ATP) (ATP-P, 300 µM or 9.3 mg L−1) with 1 g L−1 of the dry sediment or soil sample. Error bars represent (top) standard deviation of 3 independent replicates for abiotic contribution or (bottom) errors in X-ray absorption near-edge structure spectroscopy model fitting for particulate P speciation. c, d μ-X-ray fluorescence mapping of count intensity for iron (Fe) (blue, max intensity = 500 for c or 900 for d) and P (red, max intensity = 25,000) in (c) sediment or (d) soil before (left) and after (right) 7 d reaction with ATP. In (a) and (b) background particulate P species in the reference sediment and soil samples are noted as “Sediment ref” and “Soil ref”, respectively. In (c) and (d) the scale bars (shown in white) represent 300 µm. Source data are provided as a Source Data file.

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