文献类型：期刊文献

英文题名：Modulating phyllosphere microbiome structure and function in Loropetalum chinense and Osmanthus fragrans: The impact of foliar dust and heavy metals

作者：Dang, Ning[1] Xing, Wenli[1] Gai, Xu[1] Chen, Guangcai[1]

第一作者：Dang, Ning

通信作者：Chen, GC[1]

机构：[1]Chinese Acad Forestry, Res Inst Subtrop Forestry, Hangzhou 311400, Peoples R China

年份：2024

卷号：916

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001172439600001)】；

基金：This research was supported by the National Natural Science Foundation of China (32071736) .

语种：英文

外文关键词：Particulate matter; Heavy metal; Phyllosphere microbiome; Leaves; Metabolic function

摘要：Trees can effectively capture airborne particles and improve air quality. However, the specific response of phyllosphere microbiome (PMo) in different plant species to particulate matter (PM) and the heavy metals it contains are not yet fully understood. In this study, we investigated the impact of PM on the diversity and function of PMo in Loropetalum chinense and Osmanthus fragrans trees grown in industrial and clean zones with varying levels of PM pollution. Our findings revealed that leaf dust had a significant negative effect on microbial richness, with O. fragrans exhibiting higher microbial diversity than L. chinense. The dominant phylum of phyllosphere bacteria in all samples was Proteobacteria, and the dominant genera were Stenotrophomonas and Delftia. The relative abundance of these genera varied significantly among plant species and regions. Our results showed that PM had a significant impact on the community composition of PMo, with the presence of heavy metals exerting a greater effect than particle size. Moreover, the foliar microbial community of plants grown in industrial zones exhibited significantly higher metabolic functions related to stress resistance and disease resistance compared to plants in control zones. These findings highlight the structural and functional responses of PMo to PM and indicate their potential for enhancing plant adaptation to environmental stress.