Potential contribution of lysed bacterial cells to phosphorus solubilisation in two rewetted Australian pasture soils

• Published in: Soil biology & biochemistry Vol. 35; no. 1; pp. 187 - 189
• Main Authors: Turner, Benjamin L, Driessen, Jennifer P, Haygarth, Philip M, Mckelvie, Ian D
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 2003; New York, NY Elsevier Science
• Subjects: Agronomy. Soil science and plant productions; air drying; Bacterial cell counts; Biological and medical sciences; Chemical, physicochemical, biochemical and biological properties; cytolysis; DAPI staining; Fundamental and applied biological sciences. Psychology; Generalities; grassland soils; Pasture soils; Phosphorus; Physics, chemistry, biochemistry and biology of agricultural and forest soils; soil bacteria; soil biology; Soil science; solubility; Victoria (Australia); Water extracts; Wetting and drying; Australia; Oceania; Victoria (Australia); Pasture soils; Wetting and drying; Phosphorus; Water extracts; DAPI staining; Bacterial cell counts; Lysate; Alfisols; Biogeochemical cycle; Oxisols; Solubilization; Soil water properties; Phosphorus cycle; Bacteria; Chemical composition; Chemical concentration; Rewetting; Wetting drying cycle; Release; Grassland soil
• ISSN: 0038-0717; 1879-3428
• DOI: 10.1016/S0038-0717(02)00244-4

Soil drying renders considerable amounts of phosphorus soluble upon rewetting, which may be partly derived from lysed microbial cells. Using direct bacterial cell counting in water and tetra-sodium pyrophosphate extracts of two Australian pasture soils, we found that almost all extractable cells were lysed following the rewetting of dry soils. The amounts of phosphorus in the lysed cells corresponded closely to the increases in water-extractable phosphorus following soil drying, suggesting that bacterial cell lysis is a major source of the released phosphorus.