文献类型：期刊文献

英文题名：Populus root exudates are associated with rhizosphere microbial communities and symbiotic patterns

作者：Li, Mengjie[1] Song, Zhen[2] Li, Zhanbiao[1] Qiao, Rongye[1] Zhang, Pingdong[1] Ding, Changjun[3] Xie, Jianbo[1] Chen, Yinglong[4] Guo, Hui[1,5]

第一作者：Li, Mengjie

通信作者：Guo, H[1];Guo, H[2]

机构：[1]Beijing Forestry Univ, Coll Biol Sci & Technol, Beijing, Peoples R China;[2]Chinese Acad Agr Sci, Inst Environm & Sustainable Dev Agr, Beijing, Peoples R China;[3]Chinese Acad Forestry, Res Inst Forestry, State Key Lab Tree Genet & Breeding, Key Lab Tree Breeding & Cultivat State Forestry A, Beijing, Peoples R China;[4]UWA Inst Agr, UWA Sch Agr & Environm, Perth, WA, Australia;[5]Natl Engn Res Ctr Tree Breeding & Ecol Restorat, Beijing, Peoples R China

年份：2022

卷号：13

外文期刊名：FRONTIERS IN MICROBIOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000907234100001)】；

基金：Funding This work was funded by National Key Research and Development Program of China (2021YFD2201205), National Natural Science Foundation of China (41601513 and 41977203), and Beijing Forestry University Municipal Training Program of Innovation and Entrepreneurship for Undergraduates (202110022017).

语种：英文

外文关键词：dominant taxa; keystone taxa; differential root exudates; phenolic compounds; interactive effect

摘要：IntroductionMicrobial communities in the plant rhizosphere are critical for nutrient cycling and ecosystem stability. However, how root exudates and soil physicochemical characteristics affect microbial community composition in Populus rhizosphere is not well understood. MethodsThis study measured soil physiochemistry properties and root exudates in a representative forest consists of four Populus species. The composition of rhizosphere bacterial and fungal communities was determined by metabolomics and high-throughput sequencing. ResultsLuvangetin, salicylic acid, gentisic acid, oleuropein, strigol, chrysin, and linoleic acid were the differential root exudates extracted in the rhizosphere of four Populus species, which explained 48.40, 82.80, 48.73, and 59.64% of the variance for the dominant and key bacterial or fungal communities, respectively. Data showed that differential root exudates were the main drivers of the changes in the rhizosphere microbial communities. Nitrosospira, Microvirga, Trichoderma, Cortinarius, and Beauveria were the keystone taxa in the rhizosphere microbial communities, and are thus important for maintaining a stable Populus microbial rhizosphere. The differential root exudates had strong impact on key bacteria than dominant bacteria, key fungi, and dominant fungi. Moreover, strigol had positively effects with bacteria, whereas phenolic compounds and chrysin were negatively correlated with rhizosphere microorganisms. The assembly process of the community structure (keystone taxa and bacterial dominant taxa) was mostly determined by stochastic processes. DiscussionThis study showed the association of rhizosphere microorganisms (dominant and keystone taxa) with differential root exudates in the rhizosphere of Populus plants, and revealed the assembly process of the dominant and keystone taxa. It provides a theoretical basis for the identification and utilization of beneficial microorganisms in Populus rhizosphere.