"植物の光合成に対するCO2の肥料化効果の最近の世界的な減少"に関するコメント
Yuxing Sang1, Ling Huang1, Xuhui Wang1
1Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
Science (New York, N.Y.)
|September 23, 2021
まとめ
光合成に対する二酸化炭素受精効果 (CFE) に関する研究結果に異議を唱える. 変化を誤って割り当てる可能性があり,二酸化炭素の排出量を無視している.
科学分野:
- 植物生理学
- 世界的な炭素循環
- 光合成の研究
背景:
- CO2受精効果 (CFE) は,大気中のCO2が植物に光合成を促す方法を説明する.
- 衛星データを用いてCFEの有意な低下を報告した.
- これらの報告は,光合成効率の変化は主にCO2以外の要因によって引き起こされたことを示唆しています.
研究 の 目的:
- Wang et al.によるCFEの推定に使用された方法論を批判的に評価する.
- 衛星による光合成プロキシーにおける潜在的なバイアスと限界を調査する.
- 光合成の調節におけるCO2の役割,特にRuBisCOへの影響を再検討する.
主な方法:
- 二酸化炭素濃度と光合成のプロキシに関する回帰係数 (β) の分析
- CFEの衛星ベースの推定の信頼性の評価
- RuBisCO酵素に対するCO2の直接的な生化学的影響の検討
主要な成果:
- Wang et al が採用した方法 CFEを正確に推定するには不十分であることが示されています.
- 衛星のプロキシは,光合成に対するCO2の影響のニュアンスを確実に捉えることはできません.
- この調査は,RuBisCOの活動に対するCO2の直接的な影響を無視した重大な過失を強調しています.
結論:
- CFEの大きな減少がWang et alによって報告されました. 方法論に欠陥がある可能性が高い
- CFEの正確な推定には,RuBisCOのような酵素に対するCO2の生化学的影響を考慮する必要があります.
- CFEと世界の炭素循環におけるその役割を評価する方法を精錬するためにさらなる研究が必要である.
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