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Abstract <p>Phosphorus (P) is an essential nutrient for plant and microbial growth. Phosphatases play a crucial role in catalyzing the hydrolysis of phosphate esters in organic compounds, thereby regulating the bioavailability of soil P pools.&#xa0;The aim was to identify the optimal concentration of phosphatase activator to increase soil P availability in four soil types.&#xa0;Microcosm experiments were conducted on black soil from Northeast China with the addition of different concentrations (0, 0.05, 0.1, 0.3, 0.4, and 0.6%) of glutathione (GSH) based on the performance of phosphatase activities, soil available P, and phosphatase kinetic parameters. Four typical soil types including albic soil, black soil, brown soil, and cinnamon soil were further selected to test the effect of 0.4% GSH using pot experiments.&#xa0;GSH stimulated the activities of soil phosphomonoesterase (APase) and phosphodiesterase (PD), with an optimal concentration of 0.4%. GSH increased APase activity by raising its <i>Vmax</i> in all four soil types. Additionally, the addition of GSH (0.4%) significantly increased APase and PD activities in black and cinnamon soils through wheat pot experiments. GSH addition also raised the total P content in wheat by 42% in albic soil but decreased it by 18% in cinnamon soil.&#xa0;The results indicated that GSH has the great potential to regulate P dynamics in soils by stimulating phosphatase activities. These findings offer alternative strategies in mining organic P for plant growth in agricultural ecosystems.</p> Graphical Abstract <p></p>

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Glutathione Increases Phosphorus Availability Via Stimulating Phosphatase Activities in Four Soil Types in Northeast China

  • 期刊论文

  • 发表日期：

    2025年10月20日

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  • Chenran Wu,
  • Jupei Shen,
  • Yulan Zhang,
  • Nan Jiang,
  • Dongqi Jiang,
  • Zhenhua Chen,
  • Lijun Chen

摘要

Abstract

Phosphorus (P) is an essential nutrient for plant and microbial growth. Phosphatases play a crucial role in catalyzing the hydrolysis of phosphate esters in organic compounds, thereby regulating the bioavailability of soil P pools. The aim was to identify the optimal concentration of phosphatase activator to increase soil P availability in four soil types. Microcosm experiments were conducted on black soil from Northeast China with the addition of different concentrations (0, 0.05, 0.1, 0.3, 0.4, and 0.6%) of glutathione (GSH) based on the performance of phosphatase activities, soil available P, and phosphatase kinetic parameters. Four typical soil types including albic soil, black soil, brown soil, and cinnamon soil were further selected to test the effect of 0.4% GSH using pot experiments. GSH stimulated the activities of soil phosphomonoesterase (APase) and phosphodiesterase (PD), with an optimal concentration of 0.4%. GSH increased APase activity by raising its Vmax in all four soil types. Additionally, the addition of GSH (0.4%) significantly increased APase and PD activities in black and cinnamon soils through wheat pot experiments. GSH addition also raised the total P content in wheat by 42% in albic soil but decreased it by 18% in cinnamon soil. The results indicated that GSH has the great potential to regulate P dynamics in soils by stimulating phosphatase activities. These findings offer alternative strategies in mining organic P for plant growth in agricultural ecosystems.

Graphical Abstract