气候变化领域集成服务门户(CCPortal): 4D imaging reveals mechanisms of clay-carbon protection and release

CCPortal

DOI	10.1038/s41467-020-20798-6
	4D imaging reveals mechanisms of clay-carbon protection and release
	Yang J.Q.; Zhang X.; Bourg I.C.; Stone H.A.
发表日期	2021
ISSN	2041-1723
卷号	12 期号:1
英文摘要	Soil absorbs about 20% of anthropogenic carbon emissions annually, and clay is one of the key carbon-capture materials. Although sorption to clay is widely assumed to strongly retard the microbial decomposition of soil organic matter, enhanced degradation of clay-associated organic carbon has been observed under certain conditions. The conditions in which clay influences microbial decomposition remain uncertain because the mechanisms of clay-organic carbon interactions are not fully understood. Here we reveal the spatiotemporal dynamics of carbon sorption and release within model clay aggregates and the role of enzymatic decomposition by directly imaging a transparent smectite clay on a microfluidic chip. We demonstrate that clay-carbon protection is due to the quasi-irreversible sorption of high molecular-weight sugars within clay aggregates and the exclusion of bacteria from these aggregates. We show that this physically-protected carbon can be enzymatically broken down into fragments that are released into solution. Further, we suggest improvements relevant to soil carbon models. © 2021, The Author(s).
语种	英语
scopus关键词	carbon; glucose oxidase; oxygen; silicon dioxide; soil organic matter; imaging method; microbial activity; organic carbon; smectite; soil carbon; soil organic matter; sorption; Article; bacterial chromosome; carbon storage; catalyst; chemical interaction; chemical structure; confocal microscopy; decomposition; desorption; enzyme activity; four-dimensional imaging; image analysis; isotherm; microfluidics; nonhuman; Pseudomonas aeruginosa; spatiotemporal analysis; water content; water vapor
来源期刊	Nature Communications
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/250777
作者单位	Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, NJ 08544, United States; Department of Geosciences, Princeton University, Princeton, NJ 08544, United States; Princeton Environmental Institute, Princeton University, Princeton, NJ 08544, United States; Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ 08544, United States
推荐引用方式 GB/T 7714	Yang J.Q.,Zhang X.,Bourg I.C.,et al. 4D imaging reveals mechanisms of clay-carbon protection and release[J],2021,12(1).
APA	Yang J.Q.,Zhang X.,Bourg I.C.,&Stone H.A..(2021).4D imaging reveals mechanisms of clay-carbon protection and release.Nature Communications,12(1).
MLA	Yang J.Q.,et al."4D imaging reveals mechanisms of clay-carbon protection and release".Nature Communications 12.1(2021).