Depth heterogeneity of lignin-degrading microbiome and organic carbon processing in mangrove sediments.

IF 7.8 1区生物学 Q1 BIOTECHNOLOGY & APPLIED MICROBIOLOGY

npj Biofilms and Microbiomes Pub Date : 2025-01-06 DOI:10.1038/s41522-024-00638-x

Jijuan Ding, Fei Liu, Jiaxiong Zeng, Hang Gu, Jing Huang, Bo Wu, Longfei Shu, Qingyun Yan, Zhili He, Cheng Wang

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引用次数: 0

Abstract

Mangrove ecosystems are globally recognized for their blue carbon (C) sequestration capacity. Lignocellulosic detritus constitutes the primary C input to mangrove sediments, but the microbial processes involved in its bioprocessing remain unclear. Using lignocellulosic analysis and metagenomic sequencing across five 100-cm sediment cores, we found a high proportion of lignin (95.0-97.7%) within sediments' lignocellulosic detritus, with a small fraction of lignin-degrading genes (1.24-1.98%) of lignin-degrading genes within the carbohydrate-active enzyme coding genes. Depth stratification was observed in genes and microbial communities involved in lignin depolymerization and mineralization of lignin monomer derivatives. Further microbe-centered analyses of biomass production rates and adaptive metabolism revealed diminished microbial C use efficiency potential and augmented "enzyme latch" with increasing sediment depths. These findings enhance our understanding of sedimentary organic C cycling and storage in coastal blue C ecosystems.

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红树林沉积物中木质素降解微生物群落的深度异质性及有机碳处理

红树林生态系统具有全球公认的蓝碳(C)固存能力。木质纤维素碎屑构成红树林沉积物的主要碳输入，但参与其生物处理的微生物过程尚不清楚。通过对5个100 cm沉积物岩心的木质纤维素分析和宏基因组测序，我们发现沉积物的木质纤维素碎屑中木质素的比例很高（95.0-97.7%），而碳水化合物活性酶编码基因中木质素降解基因的比例很小（1.24-1.98%）。参与木质素单体衍生物解聚和矿化的基因和微生物群落存在深度分层。进一步以微生物为中心的生物量生产速率和适应性代谢分析表明，随着沉积物深度的增加，微生物C利用效率潜力降低，“酶锁存”增强。这些发现增强了我们对海岸蓝碳生态系统沉积有机碳循环和储存的认识。

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来源期刊

npj Biofilms and Microbiomes Immunology and Microbiology-Microbiology

CiteScore

12.10

自引率

3.30%

发文量

审稿时长

9 weeks

期刊介绍： npj Biofilms and Microbiomes is a comprehensive platform that promotes research on biofilms and microbiomes across various scientific disciplines. The journal facilitates cross-disciplinary discussions to enhance our understanding of the biology, ecology, and communal functions of biofilms, populations, and communities. It also focuses on applications in the medical, environmental, and engineering domains. The scope of the journal encompasses all aspects of the field, ranging from cell-cell communication and single cell interactions to the microbiomes of humans, animals, plants, and natural and built environments. The journal also welcomes research on the virome, phageome, mycome, and fungome. It publishes both applied science and theoretical work. As an open access and interdisciplinary journal, its primary goal is to publish significant scientific advancements in microbial biofilms and microbiomes. The journal enables discussions that span multiple disciplines and contributes to our understanding of the social behavior of microbial biofilm populations and communities, and their impact on life, human health, and the environment.