Rapid transformation of inorganic to organic and plant-available phosphorous in soils of a glacier forefield

Egli, Markus; Filip, Damien; Mavris, Christian; Fischer, Benjamin; Götze, Jens; Raimondi, Salvatore; Seibert, Jan

doi:10.1016/j.geoderma.2012.06.033

Cited by 25 publications

(24 citation statements)

References 47 publications

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“…With mineral nutrients becoming incorporated into biomass and with organic matter accumulating during soil formation, an increasing portion of nutrients, including P, is organically bound ( Walker and Syers , 1976; Anderson , 1988; Egli et al, 2012), partially accumulating in organic layers lying atop the mineral soil ( Brandtberg et al, 2010). Water percolating through this layer becomes P‐enriched in soluble and colloidal forms which then enter the mineral soil, provided there is no surface runoff.…”

Section: Forest Phosphorus Cycle During Ecosystem Developmentmentioning

confidence: 99%

Atomic‐Level Quality Assessment of Enzymes Encapsulated in Bioinspired Silica

Martelli

Ravera

Louka

et al. 2015

Chemistry A European J

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Among protein immobilization strategies, encapsulation in bioinspired silica is increasingly popular. Encapsulation offers high yields and the solid support is created through a protein-catalyzed polycondensation reaction that occurs under mild conditions. An integrated strategy is reported for the characterization of both the protein and bioinspired silica scaffold generated by the encapsulation of enzymes with an external silica-forming promoter or with the promoter expressed as a fusion to the enzyme. This strategy is applied to the catalytic domain of matrix metalloproteinase 12. Analysis reveals that the structure of the protein encapsulated by either method is not significantly altered with respect to the native form. The structural features of silica obtained by either strategy are also similar, but differ from those obtained by other approaches. In case of the covalently linked R5-enzyme construct, immobilization yields are higher. Encapsulation through a fusion protein, therefore, appears to be the method of choice.

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Section: Forest Phosphorus Cycle During Ecosystem Developmentmentioning

confidence: 99%

Atomic‐Level Quality Assessment of Enzymes Encapsulated in Bioinspired Silica

Martelli

Ravera

Louka

et al. 2015

Chemistry A European J

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“…The ratios were much lower than those of the chronosequences of similar soil ages. There were no significant decreases of TP at the Morteratsch chronosequence (150 years) and the Damma chronosequence (120 years) in the Swiss Alps (Egli et al, 2012;Prietzel et al, 2013). Meanwhile, these ratios were also lower than those of several older chronosequences.…”

Section: Was P Lost During the 120 Years Of Pedogenesis?mentioning

confidence: 80%

Rapid loss of phosphorus during early pedogenesis along a glacier retreat choronosequence, Gongga Mountain (SW China)

Zhou

Bing

et al. 2015

Preprint

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The loss of phosphorus (P) during the early pedogenesis stage is important at the ecosystem level, and it also plays an important role in the global P cycle. The seasonal variation of total P (Pt) and its fractions along a young soil chronosequence (Hailuogou chronosequence) on the eastern slope of Gongga Mountain, SW China, was investigated based on the modified Hedley fractionation technique to understand P loss during the early pedogenesis stage. The results showed that the mineral P (mainly apatite) was the dominant fraction of Pt in the C horizon of the soil, and the seasonal difference in Pt and its fractions was insignificant. In the A horizon, Pt concentrations decreased markedly compared with those in the C horizon, and as the age of the soil increased, the inorganic P (Pi) significantly decreased and the organic P (Po) prominently increased. Seasonally, the P fractions exhibited various distributions in the A horizon. The variation of Pt and its fractions revealed that the P loss was rapid along the 120-year soil chronosequence. The concentrations of Pt in the original minerals decreased more than 50% in the 52 years since the glacier retreated, and the depletion reached almost 80% at the 120-year pedogenesis. The loss of P from the soil of the Hailuogou chronosequence was mainly attributed to weathering, plant uptake, and transport by runoff. The data obtained indicated that the glacier retreat chronosequence could be used to elucidate the fast rate of P loss during the early pedogenesis stage. Abstract The loss of phosphorus (P) during the early pedogenesis stage is important at the ecosystem level, and it also plays an important role in the global P cycle. The seasonal variation of total P (Pt) and its fractions along a young soil chronosequence (Hailuogou chronosequence) on the eastern slope of Gongga Mountain, SW China, was investigated based on the modified Hedley fractionation technique to understand P loss during the early pedogenesis stage. The results showed that the mineral P (mainly apatite) was the dominant fraction of Pt in the C horizon of the soil, and the seasonal difference in Pt and its fractions was insignificant. In the A horizon, Pt concentrations decreased markedly compared with those in the C horizon, and as the age of the soil increased, the inorganic P (Pi) significantly decreased and the organic P (Po) prominently increased. Seasonally, the P fractions exhibited various distributions in the A horizon. The variation of Pt and its fractions revealed that the P loss was rapid along the 120-year soil chronosequence. The concentrations of Pt in the original minerals decreased more than 50% in the 52 years since the glacier retreated, and the depletion reached almost 80% at the 120-year pedogenesis. The loss of P from the soil of the Hailuogou chronosequence was mainly attributed to weathering, plant uptake, and transport by runoff. The data obtained indicated that the glacier retreat chronosequence could be used to elucidate the fast rate of P loss during the early pedogenesis sta...

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“…The main source of phosphorus for plants are soluble orthophosphates in the soil solution, including H 2 PO 4 and, to a lesser degree, HPO 4 [Egli et al, 2012]. In plant cells, inorganic phosphorus is accessible from the metabolic pool [Gomes et al, 2014].…”

Section: Resultsmentioning

confidence: 99%

Chemical Composition of Spring Rapeseed Grown in Copper- Contaminated Soil Amended With Halloysite and Zeolite

Radziemska¹,

Mazur²

2017

J. Ecol. Eng.

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The purpose of this study was to determine the effect of soil contamination with copper doses of 0, 150, 300, and 450 mg . kg-1 of soil and the application of zeolite, raw and modified halloysite on the biomass of spring rapeseed and the content of nitrogen compounds and macronutrients in the above-ground parts of the tested plants. The content of macronutrients in plants was determined spectrophotometrically. The applied soil amendments and copper doses led to significant variations in the concentrations of the analyzed nutrients in spring rapeseed. Zeolite and halloysite were most effective in increasing the average above-ground biomass of the tested plants. Zeolite had a beneficial effect on the content of total nitrogen, ammonia nitrogen and phosphorus in the above-ground parts of spring rapeseed. Raw halloysite increased the content of sodium and calcium, whereas modified halloysite contributed to an increase in the nitrogen, potassium, sodium, calcium and magnesium content of the tested plants.

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Rapid transformation of inorganic to organic and plant-available phosphorous in soils of a glacier forefield

Cited by 25 publications

References 47 publications

Atomic‐Level Quality Assessment of Enzymes Encapsulated in Bioinspired Silica

Atomic‐Level Quality Assessment of Enzymes Encapsulated in Bioinspired Silica

Rapid loss of phosphorus during early pedogenesis along a glacier retreat choronosequence, Gongga Mountain (SW China)

Chemical Composition of Spring Rapeseed Grown in Copper- Contaminated Soil Amended With Halloysite and Zeolite

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