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Resource: used or used up in processes

Amino acids

Appears in 12 processs and 19 steps. Everything below is linked: open a process to see it in context.

Top processes

Soil nitrogen mineralization and immobilization turnover

4 steps

Root exudate chemistry, fate and priming

3 steps

Passive efflux of sugars and amino acids down a concentration gradient of roughly 1000:1 from cytosol to soil solution
Exudate compounds enter soil solution with half-lives of minutes to hours
Root re-uptake of amino acids by membrane transporters recaptures nitrogen

Enzymatic depolymerization of plant polymers

2 steps

Soil viruses and bacteriophages: lysis, lysogeny and the viral shunt

2 steps

Bacteria and archaea

1 step

Soluble substrates diffuse to bacterial cells

Organic matter decomposition

1 step

Microbial uptake and assimilation of monomers

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Nitrogen cycling

1 step

Organic nitrogen is mineralized to ammonium (ammonification)

Roots and rhizosphere

1 step

Root exudate chemistry, fate and priming

Biological nitrogen fixation: nitrogenase, oxygen protection and regulation

1 step

Fixed N is exported as ammonium or amino acids to the host, or released by free-living cells on death or grazing

Microbial dormancy, the seed bank and resuscitation

1 step

Spores germinate when germinant receptors (for example GerA for L-alanine) sense nutrients

Biological soil crusts: cyanobacteria, lichens and mosses on dryland surfaces

1 step

Fixed nitrogen leaks as ammonium and amino acids to the soil beneath and neighbouring plants and microbes

Predatory bacteria: Bdellovibrio and Myxococcus hunting soil prey

1 step

Myxobacteria lyse prey outside the cell and take up the soluble products

Often found with

Carbon 8 Soil microbes 6 Sugars 5 Ammonium 5 Plant roots 5 Nitrogen 4 Organic nitrogen 4 Water 3 Decomposers 3 Soil solution 2 Extracellular enzymes 2 Mycorrhizal fungi 2

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