Microbial carbohydrate-active enzymes influence soil carbon by regulating the of plant- and fungal-derived biomass decomposition in plateau peat wetlands under differing water conditions

• Published in: Frontiers in microbiology 2023-09, Vol.14, p.1266016-1266016
• Main Authors: Xiong, Mingyao, Jiang, Wei, Zou, Shuzhen, Kang, Di, Yan, Xianchun
• Format: Article
• Language: English
• Subjects: CAZyme; eastern margin of the Tibetan Plateau; metagenomics; Microbiology; plant-derived carbon; soil enzymes
• ISSN: 1664-302X; 1664-302X
• DOI: 10.3389/fmicb.2023.1266016

Peatlands are important carbon sinks and water sources in terrestrial ecosystems. It is important to explore their microbial-driven water-carbon synergistic mechanisms to understand the driving mechanisms of carbon processes in peatlands. Based on macrogenomic sequencing techniques, located on the peatland of the eastern margin of the Tibetan Plateau with similar stand and different water conditions, we taken soil properties, microbiome abundance, CAZyme abundance and enzyme gene pathways as the object of study, investigated the characterization of soil microbial carbohydrate-active enzymes (CAZymes) under different water gradients in peatland. According to the results, these three phyla (Chloroflexi, Gemmatimonadetes, and Verrucomicrobia) differed significantly between water gradients. Under dried wetlands, the abundance of CAZymes involved in hemicellulose and glucan degradation increased by 3.0 × 10 −5 and 3.0 × 10 −6 , respectively. In contrast, the abundance of CAZymes involved in chitin degradation decreased by 1.1 × 10 −5 ( p