Soil organic carbon sourcing variance in the rhizosphere vs. non-rhizosphere of two mycorrhizal tree species
文献类型：期刊论文
| 作者 | Jia, Yufu; Liu, Zongguang2; Zhou, Lei2; Liu, Xiaojuan; Ma, Keping2; Feng, Xiaojuan2 |
| 刊名 | SOIL BIOLOGY & BIOCHEMISTRY
 |
| 出版日期 | 2023 |
| 卷号 | 176 |
| ISSN号 | 0038-0717 |
| 关键词 | Soil organic carbon Rhizosphere Mycorrhizal fungi Saprotrophic bacteria competition Microbial necromass Lignin phenol |
| DOI | 10.1016/j.soilbio.2022.108884 |
| 文献子类 | Article |
| 英文摘要 | Soil organic carbon (SOC) plays a central role in ecosystem carbon sequestration and climate change mitigation, and its stability and dynamics are related to sourcing from microbial vs. plant residues. However, SOC sourcing and its regulating mechanisms remain poorly understood in soil's most bioactive compartment, the rhizosphere, which may differ from non-rhizosphere and under different mycorrhizal tree species. To fill the knowledge gap, here we collect the rhizosphere and non-rhizosphere soils under an arbuscular mycorrhizal (AM; Castanopsis eyrie) vs. an ectomycorrhizal (ECM) tree species (Pinus massoniana) of varied tree diameters (i.e., ages) in the Gutianshan subtropical forest of China. Plant and microbial residual components are quantified by lignin phenols and amino sugars, respectively. Coupled with the measurements of soil, microbial community and plant litter properties, we assess potential mechanisms (i.e., saprotrophic bacteria competition, microbial necromass recycling/reuse, and substrate quality control) influencing the distribution of plant and microbial residues in the rhizosphere vs. non-rhizosphere. We show that lignin phenols are more concentrated in rhizosphere than nonrhizosphere SOC, especially under the ECM trees showing inhibited saprotrophic decomposition induced by competition between ECM fungi and (saprophytic) bacteria. Amino sugars are also more concentrated in the rhizosphere of ECM trees due to ECM fungal contribution, but not under AM trees exhibiting reduced fungal necromass stability partially reflected by low biomass-normalized necromass accumulation coefficients in the rhizosphere. As a result, ratios of amino sugars to lignin phenols are relatively lower in the rhizosphere than nonrhizosphere under AM tree, challenging the presumed microbial dominance in rhizosphere carbon accumulation. These results highlight differences in and controls on rhizosphere SOC sourcing related to different mycorrhizal tree species, providing new information on the mechanisms regulating soil carbon dynamics in root-soil systems. |
| 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 | SUBSTRATE AVAILABILITY ; ARBUSCULAR MYCORRHIZAL ; LITTER DECOMPOSITION ; COMMUNITY STRUCTURE ; LIGNIN OXIDATION ; PLANT LITTER ; MURAMIC ACID ; AMINO-SUGARS ; FINE ROOTS ; MATTER |
| 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:000903761400010 |
| 资助机构 | National Natural Science Founda- tion of China ; Chinese Academy of Sciences Interdisciplinary Innovation Team ; [42025303] ; [42273076] ; [31988102] ; [41807329] ; [JCTD- 2018-06] |
| 源URL | [http://ir.ibcas.ac.cn/handle/2S10CLM1/29139]  |
| 专题 | 植被与环境变化国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jia, Yufu,Liu, Zongguang,Zhou, Lei,et al. Soil organic carbon sourcing variance in the rhizosphere vs. non-rhizosphere of two mycorrhizal tree species[J]. SOIL BIOLOGY & BIOCHEMISTRY,2023,176. |
| APA | Jia, Yufu,Liu, Zongguang,Zhou, Lei,Liu, Xiaojuan,Ma, Keping,&Feng, Xiaojuan.(2023).Soil organic carbon sourcing variance in the rhizosphere vs. non-rhizosphere of two mycorrhizal tree species.SOIL BIOLOGY & BIOCHEMISTRY,176. |
| MLA | Jia, Yufu,et al."Soil organic carbon sourcing variance in the rhizosphere vs. non-rhizosphere of two mycorrhizal tree species".SOIL BIOLOGY & BIOCHEMISTRY 176(2023). |
入库方式： OAI收割
来源：植物研究所
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