当前位置: X-MOL 学术Eur. J. Soil Biol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Warming affects soil metabolome: The case study of Icelandic grasslands
European Journal of Soil Biology ( IF 3.7 ) Pub Date : 2021-05-20 , DOI: 10.1016/j.ejsobi.2021.103317
Albert Gargallo-Garriga , Jordi Sardans , Marta Ayala-Roque , Bjarni D. Sigurdsson , Niki I.W. Leblans , Michal Oravec , Karel Klem , Ivan A. Janssens , Otmar Urban , Josep Peñuelas

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 °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 °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 °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 °C in the Arctic region by the end of the 21st century. Our results suggest that temperature increases of ≥+5 °C would permanently alter soil metabolomic profile, whereas smaller temperature increases of (≤+3 °C) would affect soil metabolome profile transiently, not permanently.



中文翻译:

变暖影响土壤代谢组:以冰岛草原为例

在北极和亚北极地区,变暖的影响要比在温带和热带地区强。我们研究了沿两个土壤升温梯度(0至+15°C)的土壤代谢组。一个温度梯度已经存在了至少50年,甚至可能是几个世纪(长期处理),而第二个温度梯度是在2008年的浅层地壳地震(短期处理)之后产生的。两个地点的土壤代谢组对变暖的反应不同。在短期变暖的地点,相对于对照,≤+ 3°C的变暖已经改变了土壤代谢组学特征,而在长期变暖的地点,土壤代谢组仅在≥+ 5°C的温度下才发生变化。糖和氨基酸是参与热保护机制的主要代谢产物,是在最高土壤升温水平下积累的主要化合物。与广泛的应激源相关的一些次生代谢产物,如酚酸和萜烯,也被上调。在IPCC情景中,大多数气候模型都预测,到21世纪末,北极地区的年平均气温将大幅上升,最高可达8°C。我们的结果表明,≥+ 5°C的温度升高会永久改变土壤代谢组学特征,而较小的温度升高(≤+ 3°C)会暂时而非永久性地影响土壤代谢组学特征。

更新日期:2021-05-22
down
wechat
bug