A paradigm shift for rhizosphere priming effects to unearth new potential for more sustainable plant production?
根圏プライミング効果のパラダイムシフト：より持続可能な植物生産の新たな可能性を開く？ (AI 翻訳)
Jennifer Michel
🤖 gxceed AI 要約
日本語
根圏プライミング効果（RPE）は土壌有機物の分解を促進しCO2を放出すると考えられてきたが、本論文は正と負のRPEが相殺し、正味で土壌炭素収支に中立から正の効果をもたらす可能性を実証・モデル化した。また、ラボ実験では土壌構造の破壊や食物網の欠如によりRPEを過大評価することを指摘し、同位体測定誤差が疑似プライミングを生むことを示した。RPEは炭素と栄養の供給・需要を同期させる機構であり、野外での影響は限定的と結論づけた。
English
Rhizosphere priming effects (RPE) are often assumed to accelerate soil organic matter turnover and net carbon loss. This paper challenges that paradigm by showing that positive and negative RPE can cancel, leading to neutral or positive net soil carbon balance. It cautions that lab incubations overestimate RPE due to soil disruption and lack of natural food webs, and measurement errors can generate spurious priming. The authors suggest RPE synchronizes carbon and nutrient supply rather than driving consistent carbon loss, with modest field effects.
Unofficial AI-generated summary based on the public title and abstract. Not an official translation.
📝 gxceed 編集解説 — Why this matters
日本のGX文脈において
日本では、農地土壌への炭素貯留がカーボンニュートラル戦略の一環として注目されています。本論文は、根圏プライミング効果を正しく評価し、持続可能な農業による炭素隔離の可能性を検討する上で重要な基礎知見を提供します。
In the global GX context
This paper reframes rhizosphere priming effects as a mechanism for nutrient synchronization rather than a consistent carbon-loss driver. It has implications for global carbon cycle models and the assessment of soil carbon sequestration as a nature-based climate solution, relevant to the IPCC and UNFCCC processes.
👥 読者別の含意
🔬研究者:For those studying soil carbon dynamics and climate feedback, this paper provides a critical re-evaluation of priming effects and methodological guidance.
🏢実務担当者:Agricultural practitioners interested in sustainable plant production and soil health may note that priming effects are less detrimental in field conditions, supporting practices that increase root exudation (e.g., cover cropping) without fear of net carbon loss.
🏛政策担当者:Policymakers designing agricultural carbon offset programs should consider that lab-based estimates of priming may overestimate carbon loss, and field-validated measurements are needed.
📄 Abstract（原文）
Rhizosphere priming effects (RPE) are often assumed to accelerate soil organic matter turnover and drive net carbon loss from soils, thereby amplifying climate warming via CO2-feedbacks. Here, this paradigm is challenged combining empirical evidence and a stoichiometric model to show that co-occurring positive and negative RPE can cancel each other over time, resulting in neutral or positive net effects on the soil carbon balance. Then, several data streams are united to caution against upscaling reductionist laboratory soil incubations to ecosystem processes, because they consistently overestimate RPE, related to sieving disrupting the physical integrity of soil minerals and because food webs in natural ecosystems buffer the effects of labile C-inputs so that priming in nature has less extreme magnitudes than in soil incubations. Monte-Carlo simulations further demonstrate that even modest isotopic and flux measurement errors can generate spurious priming estimates when isotopic contrast is weak, highlighting the need for improved methodical accuracy to draw robust conclusion about priming in vivo. In conclusion, it is suggested RPE might function as a mechanism to synchronize carbon and nutrient supply and demand in the rhizosphere, rather than a consistent driver of soil carbon loss, with more modest effects in the field than in the lab. Future research prioritizing experiments with living plants at high labelling intensities, linking C and N fluxes and holistically accounting for the net carbon balance with respect to plant, soil and biota pools and fluxes will provide a more accurate foundation for the conceptualization of rhizosphere contributions to ecosystem carbon and nutrient cycling.
🔗 Provenance — このレコードを発見したソース
- semanticscholar https://doi.org/10.1007/s00374-026-02021-8first seen 2026-07-13 07:28:30
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