The rhizospheric microbiome becomes more diverse with maize domestication and genetic improvement  

作　　者：HUANG Jun LI Yun-feng MA Yuan-ying LI Yan-sheng JIN Jian LIAN Teng-xiang 

机构地区：[1]Key Laboratory of Plant Molecular Breeding of Guangdong Province,College of Agriculture,South China Agricultural University,Guangzhou 510640,P.R.China [2]Centre for Mined Land Rehabilitation,Sustainable Minerals Institute,The University of Queensland,Brisbane Qld 4072,Australia [3]Key Laboratory of Mollisols Agroecology,Northeast Institute of Geography and Agroecology,Chinese Academy of Sciences,Harbin 150081,P.R.China [4]Department of Animal,Plant and Soil Sciences,Centre for AgriBioscience,La Trobe University,Melbourne Campus,Bundoora Vic 3086,Australia

出　　处：《Journal of Integrative Agriculture》2022年第4期1188-1202,共15页农业科学学报（英文版）

基　　金：supported by the Key Area Research and Development Program of Guangdong Province,China(2018B020202013);the National Key R&D Program of China(2018YFD1000903);the Natural Science Foundation of Guangdong Province,China(2018A030313865)。

摘　　要：Domestication and genetic improvement of maize improve yield and stress tolerance due to changes in morphological and physiological properties, which likely alter rhizosphere microbial diversity. Understanding how the evolution of maize germplasm impacts its rhizobacterial traits during the growth stage is important for optimizing plant-microbe associations and obtaining yield gain in domesticated germplasms. In this study, a total of nine accessions representing domestication and subsequent genetic improvement were selected. We then sequenced the plant DNA and rhizobacterial DNA of teosinte, landraces and inbred lines at the seedling, flowering and maturity stages in a field trial. Moreover, the soil chemical properties were determined at the respective stages to explore the associations of soil characteristics with bacterial community structures. The results showed that domestication and genetic improvement increased the rhizobacterial diversity and substantially altered the rhizobacterial community composition. The core microbiome in the rhizosphere differed among germplasm groups. The co-occurrence network analysis demonstrated that the modularity in the bacterial network of the inbred lines was greater than those of teosinte and the landraces. In conclusion, the increased diversity of the rhizobacterial community with domestication and genetic improvement may improve maize resilience to biotic stresses and soil nutrient availability to plants.

关 键 词：TEOSINTE LANDRACES inbred lines domestication and improvement core microbiome network 

分 类 号：S513[农业科学—作物学]