文献类型：期刊文献

英文题名：Impacts of litter microbial community on litter decomposition in the absence of soil microorganisms

作者：Liu, Jiaying[1,2,3] Ding, Changjun[2,3] Teng, Chao[4] Zhang, Weixi[2,3] Su, Xiaohua[2,3] Zhu, Wenxu[1]

第一作者：Liu, Jiaying

通信作者：Zhu, WX[1]

机构：[1]Shenyang Agr Univ, Coll Forestry, Shenyang, Peoples R China;[2]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Beijing, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, Key Lab Tree Breeding & Cultivat State Forestry Ad, Beijing, Peoples R China;[4]Liaoning Nonferrous Geol Explorat & Res Inst Co Lt, Shenyang, Peoples R China

年份：2024

卷号：90

期号：4

外文期刊名：APPLIED AND ENVIRONMENTAL MICROBIOLOGY

收录：;EI(收录号：20241715972139);Scopus(收录号：2-s2.0-85190903660);WOS:【SCI-EXPANDED(收录号:WOS:001184992900001)】；

基金：This work was supported by the National Natural Science Foundation of China (grant no. 32271843), the National Key Research and Development Program of China (grant no. 2021YFD2201205) and the Basic Research Fund of CAF (grant no. CAFYBB2023QB003 and CAFYBB2020SZ002).

语种：英文

外文关键词：decomposition rate; weight loss rate; Partial Least Squares Path Modeling; non-additive effect; antagonistic effect

摘要：What is the effect of phyllosphere microorganisms on litter decomposition in the absence of colonization by soil microorganisms? Here, we simulated the litter standing decomposition stage in the field to study the differences in the composition and structure of the phyllosphere microbial community after the mixed decomposition of Populus x canadensis and Pinus sylvestris var. mongolica litter. After 15 months of mixed decomposition, we discovered that litters that were not in contact with soil had an antagonistic effect (the actual decomposition rate was 18.18%, which is lower than the expected decomposition rate) and the difference between the litters themselves resulted in a negative response to litter decomposition. In addition, there was no significant difference in bacterial and fungal community diversity after litter decomposition. The litter bacterial community was negatively responsive to litter properties and positively responsive to the fungal community. Importantly, we found that bacterial communities had a greater impact on litter decomposition than fungi. This study has enriched our understanding of the decomposition of litter itself and provided a theoretical basis for further exploring the "additive and non-additive effects" of litter decomposition and the mechanism of microbial drive. IMPORTANCEThe study of litter decomposition mechanism plays an important role in the material circulation of the global ecosystem. However, previous studies have often looked at contact with soil as the starting point for decomposition. But actually, standing litter is very common in forest ecosystems. Therefore, we used field simulation experiments to simulate the decomposition of litters without contact with soil for 15 months, to explore the combined and non-added benefits of the decomposition of mixed litters, and to study the influence of microbial community composition on the decomposition rate while comparing the differences of microbial communities.