Warming affects soil metabolome: The case study of Icelandic grasslands

0544730 - ÚVGZ 2022 RIV FR eng J - Journal Article
Gargallo-Garriga, Albert - Sardans, J. - Ayala-Roque, M. - Sigurdsson, B. D. - Leblans, N. I.W. - Oravec, Michal - Klem, Karel - Janssens, I. A. - Urban, Otmar - Peñuelas, J.
Warming affects soil metabolome: The case study of Icelandic grasslands.
European Journal of Soil Biology. Roč. 105, JUL-AUG (2021), č. článku 103317. ISSN 1164-5563. E-ISSN 1778-3615
R&D Projects: GA MŠMT(CZ) EF16_019/0000797; GA MŠMT(CZ) EF16_027/0008137
Research Infrastructure: CzeCOS III - 90123
Institutional support: RVO:86652079
Keywords : plant * acid * drought * stress * carbon * biosynthesis * accumulation * ecology * Climate change * Geothermal * Iceland * Metabolome * Soil * Warming
OECD category: Environmental sciences (social aspects to be 5.7)
Impact factor: 3.232, year: 2021
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S1164556321000534?via%3Dihub#!

The effect of warming is stronger in arctic and sub-arctic latitudes than in temperate and tropical zones. We studied soil metabolomes along two soil-warming gradients (0 to +15 degrees C). One temperature gradient has been present for at least 50 years and possibly even centuries (long-term treatment), while the second gradient was created after a shallow crustal earthquake in 2008 (short-term treatment). Soil metabolomes at the two sites responded differently to warming. At the short-term warmed site, warming of +3 degrees C already shifted soil metabolomic profiles relative to the controls, whereas at the long-term warmed site the soil metabolome only shifted at temperatures +5 degrees C. Saccharides and amino acids, primary metabolites involved in protective mechanisms against heat, were the main compounds accumulated at the highest soil warming levels. Some secondary metabolites associated with a broad spectrum of stressors, like phenolic acids and terpenes, were also up-regulated. Across the IPCC scenario's, most climate models predict a substantial rise in mean annual temperature of up to 8 degrees C in the Arctic region by the end of the 21st century. Our results suggest that temperature increases of >+5 degrees C would permanently alter soil metabolomic profile, whereas smaller temperature increases of (<+3 <degrees>C) would affect soil metabolome profile transiently, not permanently.
Permanent Link: http://hdl.handle.net/11104/0321558