数字农科院2.0

Divergent responses of soil enzyme kinetics to altered precipitation across steppes with varying historical precipitation

文献类型： 外文期刊

作者： Yaru Chen;Aogui Li;Ziyue Shi;Ziyang Peng;Shiqiang Wan;Lingli Liu;Weixing Liu

作者机构：

关键词： Belowground net primary productivity;Drought;Microbial biomass;Rainfall;Sensitivity;Soil moisture

期刊名称： Applied Soil Ecology

ISSN： 0929-1393

年卷期： 2025 年 214 卷

页码：

收录情况： SCIE（2025版）

摘要： Soil extracellular enzymatic catalysis is the rate-limiting step in soil organic matter decomposition, and Vmax and Km are enzyme kinetic parameters reflecting enzyme catalytic capacity. However, it is still far from clear how these enzyme kinetic parameters respond to altered precipitation and subsequently influence soil microbial respiration (Rh). Here, we examined the Vmax and Km of seven soil hydrolytic enzymes and polyphenol oxidase (PPO), Rh, and microbial biomass carbon (MBC) under altered precipitation (− 30%, ambient, and + 30%) across Desert, Typical, and Meadow steppes. The results showed that the Vmax of hydrolytic enzymes and PPO were higher in the meadow than desert and typical steppes. Drought decreased the Vmax of C-, N-, P-degrading enzymes and PPO in the desert and typical steppes, but these changes were not observed in the meadow steppe, indicating the greater sensitivity of Vmax to altered precipitation in drier ecosystems. Similarly, there were the same patterns of Rh and MBC induced by changes in precipitation. However, changes in precipitation differently affected Km depending on enzymes and ecosystem types. Changes in Vmax of enzymes positively correlated with changes in soil moisture and belowground net primary production. Moreover, the Vmax and Km of β-glucosidase (BG) and the Vmax of leucine aminopeptidase were the best predictors for variability in Rh. Partial least squares path modeling further revealed that Rh response to altered precipitation was directly regulated by kinetic parameters of BG and Vmax of leucine aminopeptidase, rather than by MBC. These findings provide important insights into the linkages between soil hydrolase kinetics and Rh, advancing our understanding of the mechanisms of soil organic matter decomposition under climatic change.

分类号：

  • 相关文献

[1]Mitigating the negative effects of droughts on alpine grassland productivity in the northern Xizang Plateau via degradation-combating actions. Yuting Yang,Jianshuang Wu,Ben Niu,Meng Li. 2024

[2]The Monitoring Analysis for the Drought in China by Using an Improved MPI Method. Ma Ying,Mao Ke-biao,Xia Lang,Tang Hua-jun,Mao Ke-biao,Mao Ke-biao,Han Li-juan. 2012

[3]Factors controlling regional grain yield in China over the last 20 years. Wang, Xiaobin,Cai, Dianxiong,Grant, Cynthia,Hoogmoed, Willem B.,Oenema, Oene.

[4]Scenario-Based Economic Risk Assessment of Paddy Damage Caused by Floods in the Huai River Sub-Basin of China. Zhao, Sijian,Zhang, Qiao,Zhao, Sijian,Zhang, Qiao,Huang, Chongfu,Huang, Chongfu.

[5]Urban pipeline rainwater runoff is an important pathway for land-based microplastics transport to inland surface water: A case study in Beijing. Zhang, Jiajia,Ding, Wencheng,Zou, Guoyuan,Wang, Xuexia,Zhao, Meng,Guo, Sen,Chen, Yanhua. 2023

[6]Climate Change is Likely to Alter Sheep and Goat Distributions in Mainland China. Yongxiang Zhang,Guogang Wang,Yu Zhang,Sicheng Zhao,Chengji Han. 2021

[7]Optimization of the N footprint model and analysis of nitrogen pollution in irrigation areas: A case study of Ningxia Hui Autonomous Region, China. Tianpeng Zhang,Qiuliang Lei,Xia Liang,Stuart Lindsey,Jiafa Luo,Wei Pei,Xinzhong Du,Shuxia Wu,Miaoying An,Weiwen Qiu,Hongbin Liu. 2023

[8]Long-term nitrogen fertilization enhances crop yield potential in no-tillage systems through enhancing soil fertility. Li S.,Wu X.,Song X.,Liu X.,Gao H.,Liang G.,Zhang M.,Zheng F.,Yang P.. 2024

[9]Optimizing harvest aid applications for mechanical cotton harvesting: A meta-analysis of defoliation–yield trade-offs driven by crop physiology and environmental factors. Zhenwang Zhang,Yukun Wang,Xinghua Yu,Keke Yu,Huijie Hou,Qinghua Liao,Kexin Li,Zhijie Shi,Jianxin Dong,Guodong Chen,Sumei Wan,Shanwei Lou,Mingfeng Yang,Fangjun Li,Mingwei Du ,Xiaoli Tian,Zhaohu Li. 2025

[10]Processing of delta-endotoxin of Bacillus thuringiensis subsp. kurstaki HD-1 in Heliothis armigera midgut juice and the effects of protease inhibitors. Shao, ZZ,Cui, YL,Liu, XL,Yi, HQ,Ji, JH,Yu, ZN. 1998

[11]Comparison of phytotoxicity of copper and nickel in soils with different Chinese plant species. Li Bo,Li Bo,Liu Ji-fang,Ma Yi-bing,Chen Shi-bao,Yang Jun-xing. 2015

[12]Vulnerability assessment of areas affected by Chinese cryospheric changes in future climate change scenarios. He Yong,Liu QiuFeng,Wu YongFeng. 2012

[13]A sensitive and specific nanoparticle-assisted PCR assay for rapid detection of porcine parvovirus. Cui, Y.,Wang, Z.,Ma, X.,Liu, J.,Cui, S.,Cui, Y.,Cui, S.. 2014

[14]Sensitivity of Botryosphaeria dothidea from apple to tebuconazole in China. Fan, Kun,Fu, Li,Li, Xiaojun,Zhang, Yong,Zhang, Xuedan,Zhai, Hao,Qu, Jianlu,Wang, Jie.

[15]Rapid detection of duck hepatitis virus type-1 by reverse transcription loop-mediated isothermal amplification. Song, Cuiping,Wan, Hongquan,Yu, Shengqing,Han, Xiangan,Qiu, Xusheng,Hu, Qinghai,Tan, Lei,Ding, Chan.

[16]Global-scale modelling of future changes in sown areas of major crops. Wu, Wenbin,Shibasaki, Ryosuke,Yang, Peng,Tan, Guoxin,Matsumura, Kan-ichiro,Sugimoto, Kenji.

[17]Development of a TaqMan MGB RT-PCR for the rapid detection of H3 subtype avian influenza virus circulating in China. Teng, Qiaoyang,Shen, Weixia,Yan, Dawei,Yan, Liping,Li, Xuesong,Li, Guoxin,Yang, Jianmei,Li, Zejun,Teng, Qiaoyang,Yan, Liping,Li, Xuesong,Li, Guoxin,Yang, Jianmei,Li, Zejun.

[18]Production of ultrasensitive generic monoclonal antibodies against major aflatoxins using a modified two-step screening procedure. Li, Peiwu,Li, Peiwu,Zhang, Qi,Zhang, Wen,Huang, Yanling,Ding, Xiaoxia,Jiang, Jun.

[19]Production and characterization of monoclonal antibody for class-specific determination of O,O-dimethyl organophosphorus pesticides and effect of heterologous coating antigens on immunoassay sensitivity. Liu, Yan,Lou, Yang,Xu, Dan,Qian, Guoliang,Wu, Runru,Hu, Baishi,Liu, Fengquan,Zhang, Qi.

[20]Rapid detection of porcine circovirus type 2 by loop-mediated isothermal amplification. Chen, Hao-tai,Zhang, Jie,Sun, De-hui,Chu, Yue-feng,Cai, Xue-peng,Liu, Xiang-tao,Luo, Xue-nong,Liu, Yong-sheng,Liu, Qing. 2008

作者其他论文 更多>>