Allocation and turnover of rhizodeposited carbon in different soil microbial groups

doi:10.1016/j.soilbio.2020.107973

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	Allocation and turnover of rhizodeposited carbon in different soil microbial groups
	Huang, Junsheng ; Liu, Weixing ; Deng, Meifeng ; Wang, Xin ; Wang, Zhenhua 1; Yang, Lu 1; Liu, Lingli 1
刊名	SOIL BIOLOGY & BIOCHEMISTRY
	2020
卷号	150
关键词	Fungi Gram-negative bacteria Gram-positive bacteria Microbial residues PLFA-SIP Rhizodeposition
ISSN号	0038-0717
DOI	10.1016/j.soilbio.2020.107973
文献子类	Article
英文摘要	Recent advances in soil organic carbon (SOC) formation indicate that labile plant C is disproportionately important for stable SOC pool because it is utilized more efficiently by soil microbes. Rhizodeposited C, accounting for 5-20% of photosynthates, are highly bioavailable and readily metabolized substrates for soil microbes. However, it remains poorly understood how different microbial functional groups contribute to transforming rhizodeposited C to SOC. Here, we synthesized 23 studies performing (CO2)-C-13 pulse labelling of plants in conjunction with stable isotope probing of microbial phospholipid fatty acids, and explored the fate of rhizodeposited C in different soil microbial functional groups. Among microbial groups, fungi (25.3%) and gram-negative bacteria (GN; 23.5%) took up most of the rhizodeposition-derived C, while the relative abundance of fungi (13.7%) was less than a half of GN (32.7%). These results suggest that fungi have a higher capability of acquiring rhizodeposition-derived C, which may be due to their hyphal growth form allowing them to obtain rhizodeposited C more effectively. The mean turnover rates of rhizodeposited C in microbial groups ranged from 0.04 to 0.13 day(-1). We did not detect significant differences in the turnover rates of rhizodeposited C among microbial groups. Based on the distribution and turnover rate of rhizodeposited C in different microbial groups, we further revealed that GN (31.2%) and fungi (25.8%) produced the most microbial residues via rhizodeposition-derived C. Our results provided quantitative information about the roles of different microbial functional groups in competing for and processing rhizodeposition-derived C, which could help refine parameter estimation in modeling microbial transformation of plant C into SOC under global changes.
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	ACTIVE RHIZOSPHERE MICROORGANISMS ; PLANT-DERIVED CARBON ; COMMUNITY COMPOSITION ; ORGANIC-MATTER ; MYCORRHIZAL FUNGI ; ELEVATED CO2 ; FATTY-ACIDS ; ROOT ; DECOMPOSITION ; BACTERIAL
WOS研究方向	Agriculture
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000581509300001
资助机构	Chinese National Key Development Program for Basic Research [2019YFA060730] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31901138, 31988102]
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/21545]
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, Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Huang, Junsheng,Liu, Weixing,Deng, Meifeng,et al. Allocation and turnover of rhizodeposited carbon in different soil microbial groups[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,150.
APA	Huang, Junsheng.,Liu, Weixing.,Deng, Meifeng.,Wang, Xin.,Wang, Zhenhua.,...&Liu, Lingli.(2020).Allocation and turnover of rhizodeposited carbon in different soil microbial groups.SOIL BIOLOGY & BIOCHEMISTRY,150.
MLA	Huang, Junsheng,et al."Allocation and turnover of rhizodeposited carbon in different soil microbial groups".SOIL BIOLOGY & BIOCHEMISTRY 150(2020).