Plant-derived lipids play a crucial role in forest soil carbon accumulation

doi:10.1016/j.soilbio.2022.108645

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	Plant-derived lipids play a crucial role in forest soil carbon accumulation
	Dai, Guohua ; Zhu, Shanshan ; Cai, Yue ; Zhu, Erxiong 1; Jia, Yufu ; Ji, Chengjun 2; Tang, Zhiyao 2; Fang, Jingyun 2; Feng, Xiaojuan 1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2022
卷号	168
关键词	Soil organic carbon Forest Lignin Lipid Microbial necromass
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2022.108645
文献子类	Article
英文摘要	Plant and microbial residues are two main sources of soil organic carbon (SOC). While recent studies have extensively examined the distribution of microbial necromass in different ecosystems, how plant residues (in particular, non-lignin components) contribute to SOC accumulation is less clear, especially in forests which make up 50% of the global soil carbon storage. Filling this knowledge gap will help us better understand SOC accumulation patterns and their response to land-use changes. Here, we analyze plant- and microbial-derived biomarkers (including lignin phenols, amino sugars, free and hydrolysable lipids) in the topsoil of major forest types in China and compare their distribution patterns together with the existing data (for lignin phenols and amino sugars) in forests and grasslands distributed globally. At the global scale, forests contain significantly less microbial necromass in SOC compared with grasslands, suggesting higher contribution of plant-derived components to forest SOC. However, plant-derived lignin phenols do not seem to play a major role in SOC accumulation, given their negative relationship with SOC contents. Instead, leaf- and root-derived hydrolysable lipids constitute a much higher proportion of SOC than lignin phenols in the investigated forests of China, even compared to grassland soils. Moreover, in contrast to lignin phenols, both SOC contents and the relative abundance of hydrolysable plant lipids in SOC increase with decreasing soil pH, increasing reactive iron and aluminum contents and with increasing lignin oxidation (indicated by acid-to-aldehyde ratios) in these forest soils. These results suggest that with increasing lignin decomposition, plant lipids and SOC accumulated via (oxyhydr)oxide protection. Collectively, our results demonstrate differential importance of plant-derived components in SOC accumulation in forests versus grasslands and highlight that plant lipids play a more important part than lignin in forest SOC accumulation. Quantitative investigations on the distribution of plant-derived lipids in addition to lignin in forest soils may help to elucidate pathways and hotspots of plant component-dominated SOC accrual.
学科主题	Soil Science
电子版国际标准刊号	1879-3428
出版地	OXFORD
WOS关键词	PARTICLE-SIZE FRACTIONS ; ORGANIC-MATTER ; GRASSLAND SOILS ; LITTER DECOMPOSITION ; COMMUNITY STRUCTURE ; EXTRACTABLE LIPIDS ; MURAMIC ACID ; AMINO-SUGARS ; LIGNIN ; BIOMARKERS
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000793242400008
资助机构	Chinese Academy of Sciences K.C. Wong Education Foundation [GJTD-2019-10] ; National Natural Science Foundation of China [31988102, 42025303] ; Chinese Academy of Sciences Interdisciplinary Innovation Team [JCTD-2018-06]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/28799]
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Peking Univ, Inst Ecol, Coll Urban & Environm Sci, Key Lab Earth Surface Proc Minist Educ, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Dai, Guohua,Zhu, Shanshan,Cai, Yue,et al. Plant-derived lipids play a crucial role in forest soil carbon accumulation[J]. SOIL BIOLOGY & BIOCHEMISTRY,2022,168.
APA	Dai, Guohua.,Zhu, Shanshan.,Cai, Yue.,Zhu, Erxiong.,Jia, Yufu.,...&Feng, Xiaojuan.(2022).Plant-derived lipids play a crucial role in forest soil carbon accumulation.SOIL BIOLOGY & BIOCHEMISTRY,168.
MLA	Dai, Guohua,et al."Plant-derived lipids play a crucial role in forest soil carbon accumulation".SOIL BIOLOGY & BIOCHEMISTRY 168(2022).