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Resource: used or used up in processes

Organic acids

Appears in 20 processs and 31 steps. Everything below is linked: open a process to see it in context.

Top processes

Roots and rhizosphere

4 steps

Root exudation of sugars, amino acids and organic acids
Organic acids solubilize phosphorus
Root exudate chemistry, fate and priming
and 1 more in this process

Weathering

3 steps

Biological weathering by roots, mycorrhizal fungi and microbes (plants speed weathering about 2-10 fold)

3 steps

Mineral weathering and parent material

2 steps

Soil CO2 and biotic enhancement of weathering

2 steps

Pedogenesis and soil horizon development

2 steps

Show 14 more processes

Rhizosphere phosphorus mobilization: phosphatases, organic acids and fast re-sorption

2 steps

Bacteria and archaea

1 step

Bacterial phosphatases and phosphate solubilization

Mineral-associated organic matter (MAOM) formation

1 step

Desorption or microbial mining returns some carbon to solution

Root exudate chemistry, fate and priming

1 step

Active efflux of organic anions (malate, citrate) through anion channels and MATE transporters

Soil nitrification, nitrate reduction and nitrogen gas losses

1 step

Roots release biological nitrification inhibitors

Carbon priming, microbial efficiency and soil carbon sequestration

1 step

Fresh labile carbon enters from root exudates, litter leachate or residues

Phosphate sorption on Fe and Al oxides and phosphorus availability

1 step

Roots exude citrate, oxalate and acid phosphatase and form cluster roots, mobilising sorbed and organic phosphate

Aerenchyma, radial oxygen loss and the oxidised rhizosphere of wetland plants

1 step

Oxidation removes toxic Fe2+, sulfide and organic acids that otherwise injure roots in flooded soil

Disease-suppressive soils and the rhizosphere cry for help

1 step

Infected plants change exudates (for example malic acid) that recruit antagonists such as Bacillus subtilis: the cry for help

Mineral surface area, reactive metals and the saturation of mineral-associated carbon

1 step

Root exudates such as oxalic acid dissolve Fe-bound carbon: in experiments oxalic acid released mineral-bound carbon and raised microbial decomposition

Phosphorus decline and rescue across soil ages

1 step

Plants and microbes mobilise P with phosphatases and cluster roots

Biotic enhancement and climate control of weathering

1 step

Roots and fungi acidify mineral surfaces with organic acids

Soil formation

1 step

Roots, fungi and burrowers engineer soil formation

Roots, fungi and burrowers engineer soil formation

1 step

Roots and mycorrhizal fungi release protons and organic anions that dissolve minerals

Often found with

Plant roots 22 Mycorrhizal fungi 8 Fungi 7 Phosphorus 7 Rhizosphere microbes 6 Minerals 5 Carbon 5 Bacteria 4 Phosphate 4 Sugars 3 Iron 3 Carbon dioxide 3

Known by 719 participants and resources across the map.