期刊
GLOBAL CHANGE BIOLOGY
卷 24, 期 9, 页码 4238-4250出版社
WILEY
DOI: 10.1111/gcb.14281
关键词
enzymatic activity; enzyme denaturation; enzyme trait; SOC decomposition under warming; temperature sensitivity
资金
- INRA Meta Program ACCAF (project AWEST)
- Austrian Science Fund (FWF) [P28572] Funding Source: Austrian Science Fund (FWF)
Most current models of soil C dynamics predict that climate warming will accelerate soil C mineralization, resulting in a long-term CO2 release and positive feedback to global warming. However, ecosystem warming experiments show that CO2 loss from warmed soils declines to control levels within a few years. Here, we explore the temperature dependence of enzymatic conversion of polymerized soil organic C (SOC) into assimilable compounds, which is presumed the rate-limiting step of SOC mineralization. Combining literature review, modelling and enzyme assays, we studied the effect of temperature on activity of enzymes considering their thermal inactivation and catalytic activity. We defined the catalytic power of enzymes (E-power) as the cumulative amount of degraded substrate by one unit of enzyme until its complete inactivation. We show a universal pattern of enzyme's thermodynamic properties: activation energy of catalytic activity (EA(cat))
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据