Phosphate solubilization by organic anion excretion from rice (Oryza sativa L.) growing in aerobic soil
作者： GJD Kirk , EE Santos , GR Findenegg , None
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摘要: A mathematical model of P solubilization by organic anion excretion from roots is described and used to account for rice (Oryza sativa L.) plants growing in aerobic soil. In previous experiments with an aerobic, highly-weathered, P-deficient soil, we found that the were able solubilize alkali-soluble pool thereby increase their uptake. The could not be explained pH changes nor release phosphatases. subsequent citrate into nutrient solutions, synthesis tended under starvation. allows diffusion away a root, its decomposition soil microbes, reaction solubilizing P, solubilized back towards root as well it. We calculated rate based on measured steady-state concentrations rhizosphere rates decomposition. Calculations using these other parameters obtained independently showed observed increased uptake accounted for. sensitivity analysis given.
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