Catalytic efficiency of soil enzymes explains temperature sensitivity: Insights from physiological theory
文献类型：期刊论文
| 作者 | Liu, Chaoyang1; Tian, Haixia1; Gu, Xiaoyue1; Li, Ni1; Zhao, Xiaoning2; Lei, Mei3; Alharbi, Hattan4; Megharaj, Mallavarapu5; He, Wenxiang1; Kuzyakov, Yakov6,7,8 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2022-05-20 |
| 卷号 | 822页码:11 |
| 关键词 | Global warming Soil enzyme activities Temperature sensitivity Catalytic efficiency Physiological theory |
| ISSN号 | 0048-9697 |
| DOI | 10.1016/j.scitotenv.2022.153365 |
| 通讯作者 | He, Wenxiang(wenxiang.he@nwafu.edu.cn) |
| 英文摘要 | Soil enzymes are crucial for carbon and nutrient cycling and are highly sensitive to warming. Biochemical reaction rates increase with temperature according to the Arrhenius law, but changes in microbial physiology may partially counteract this warming-induced acceleration that leads enzymatic rates to deviate from Arrhenius law. Here, we attempt to reconcile disparate views on the enzyme responses to warming based on the Arrhenius law and physiological theory by enzyme catalytic efficiency. In this study, we tested the kinetic parameters of five key enzymes of C, N, and P cycling to warming (from 0 to 40 degrees C) in cropland soils originating from 5 different temperate zones. The soils were incubated for one month at 0, 10, 20, 30, and 40 degrees C (+/- 0.5 degrees C) with 60% water holding capacity (WHC). The kinetic parameters were calculated and measured at a range of 4-methyumbelliferone (MUB)-substrate concentrations. We found that catalytic efficiency (V-max/K-m) of individual enzymes ranged from 0.05 to 27 s(-1) between 0 and 40 degrees C. Maximum reaction rate (V-max) increased with warming, while V-max/K-m of most enzymes remained stable by warming at low temperatures (up to 10 degrees C), and it raised from 20 to 40 degrees C. Most enzymes had lower substrate affinities (K-m) and increased their efficiency with warming. Consistent with studies considering Arrhenius law solely, the temperature sensitivity (Q(10)) of V-max decreased with warming. However, the Q(10) of V-max/K-m displayed a lower value in the cold but a higher value in warmer temperature, which confirmed microbial adaptation based on physiological theory, consequently encouraging its linking with the Arrhenius law. Therefore, Arrhenius linked with physiological theory could correct explanation of enzyme activities by warming. Considering the microbial adaptation to temperature, the present predicted warming-induced acceleration of soil organic matter decomposition might be overestimated in cold and underestimated in warm environments. |
| WOS关键词 | PSYCHROPHILIC ENZYMES ; ORGANIC-MATTER ; COLD ; KINETICS ; OPTIMIZATION ; ACCLIMATION ; ADAPTATION ; DIVERSITY ; GRADIENT |
| 资助项目 | National Natural Science Foundation of China[41877109] ; Basic Scientific Research Foundation of Northwest A F University[ZD2013012] ; Thousand Young Talents Program[Y772121] ; Jiangsu Specially-Appointed Professor Project[R2020T29] ; Basic Scientific Research Foundation of Shaanxi province[2019JQ-178] ; Science and Technology Major Project of Guangxi[AA17204047] ; Government Program of Competitive Growth of Kazan Federal University[5-100] |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000766802100004 |
| 出版者 | ELSEVIER |
| 资助机构 | National Natural Science Foundation of China ; Basic Scientific Research Foundation of Northwest A F University ; Thousand Young Talents Program ; Jiangsu Specially-Appointed Professor Project ; Basic Scientific Research Foundation of Shaanxi province ; Science and Technology Major Project of Guangxi ; Government Program of Competitive Growth of Kazan Federal University |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/171716]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | He, Wenxiang |
| 作者单位 | 1.Northwest A&F Univ, Coll Nat Resources & Environm, Key Lab Plant Nutr & Agroenvironm Northwest China, Minist Agr, Yangling 712100, Shaanxi, Peoples R China 2.Nanjing Univ Informat Sci & Technol, Sch Geog Sci, Nanjing 210044, Peoples R China 3.Chinese Acad Sci, Ctr Environm Remediat, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.King Saud Univ, Coll Food & Agr Sci, Riyadh 11451, Saudi Arabia 5.Univ Newcastle, Fac Sci, Global Ctr Environm Remediat, Callaghan, NSW 2308, Australia 6.Univ Gottingen, Dept Agr Soil Sci, Dept Soil Sci Temperate Ecosyst, Gottingen, Germany 7.RUDN Univ, Agrotechnol Inst, Moscow 117198, Russia 8.Kazan Fed Univ, Inst Environm Sci, Kazan 420049, Russia |
| 推荐引用方式 GB/T 7714 | Liu, Chaoyang,Tian, Haixia,Gu, Xiaoyue,et al. Catalytic efficiency of soil enzymes explains temperature sensitivity: Insights from physiological theory[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2022,822:11. |
| APA | Liu, Chaoyang.,Tian, Haixia.,Gu, Xiaoyue.,Li, Ni.,Zhao, Xiaoning.,...&Kuzyakov, Yakov.(2022).Catalytic efficiency of soil enzymes explains temperature sensitivity: Insights from physiological theory.SCIENCE OF THE TOTAL ENVIRONMENT,822,11. |
| MLA | Liu, Chaoyang,et al."Catalytic efficiency of soil enzymes explains temperature sensitivity: Insights from physiological theory".SCIENCE OF THE TOTAL ENVIRONMENT 822(2022):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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