文献类型：期刊文献

英文题名：Effects of mixed-species litter on bacterial and fungal lignocellulose degradation functions during litter decomposition

作者：Wang, Wenbo[1,2] Zhang, Qian[2] Sun, Xiaomei[1,2] Chen, Dongsheng[1,2] Insam, Heribert[3] Koide, Roger T.[4] Zhang, Shougong[1,2]

第一作者：Wang, Wenbo

通信作者：Sun, XM[1];Zhang, SG[1]

机构：[1]Chinese Acad Forestry, State Key Lab Tree Genet & Breeding, Beijing 100091, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, 1 Dongxiaofu,Xiangshan Rd, Beijing 100091, Peoples R China;[3]Univ Innsbruck, Inst Microbiol, Technikerstr 25d, A-6020 Innsbruck, Austria;[4]Brigham Young Univ, Dept Biol, Provo, UT 84602 USA

年份：2020

卷号：141

外文期刊名：SOIL BIOLOGY & BIOCHEMISTRY

收录：;EI(收录号：20194907781721);Scopus(收录号：2-s2.0-85075787083);WOS:【SCI-EXPANDED(收录号:WOS:000513986700024)】；

基金：The Key Program of National Science Foundation of China (Project no. 31430017) and the National Key Research and Development Program of China (Project no. 2017YFD0600401) funded this research.

语种：英文

外文关键词：Mixed litter; Lignocellulose degradation; Microbial community composition; Enzyme activity; Metagenome

摘要：Lignocellulose is the main component of forest litter. Due to the recalcitrance of coniferous litter, nutrient turnover is usually slower in coniferous plantations. Lignocellulose decomposition is reportedly rapid in mixed-species litter, but the underlying microbial metabolic pathways that may explain this rapid rate are not well-studied. We collected litter at 60, 150, 270, and 360 days after leaf fall at three plantation types: larch, sassafras, and larch/sassafras mixed plantations. We investigated the contents of lignocellulose components, enzyme activities, microbial communities, and potential genetic functional pathways related to lignocellulose degradation. Most rates of lignocellulose component degradation and enzyme activities in mixed litter during decomposition were significantly higher than in larch litter. The relative abundances of Betaproteobacteria and Dothideomycetes, which are involved in lignocellulose degradation, were significantly higher in mixed-species litter than in larch litter. Bacterial cellulose and hemicellulose, and fungal lignin degradation genes were significantly influenced by plantation forest type. Mantel tests showed that (i) the content of lignocellulose significantly correlated with bacterial and fungal community composition and enzyme activities, and (ii) fungal decomposers might be the main drivers of lignocellulose degradation in different litter types. Mixing larch and sassafras litter changed the composition of the microbial community and the lignocellulose-degradation gene complement, accelerated the decomposition of lignocelluloses, and restored soil quality.