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农业科学学报 (英文)
2022,21
(4)
Position: Home > Articles > The rhizospheric microbiome becomes more diverse with maize domestication and genetic improvement
Journal of Integrative Agriculture
2022,21
(4)
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
单 位：
La Trobe Univ, Dept Anim Plant & Soil Sci, Ctr AgriBiosci, Melbourne Campus, Bundoora, Vic 3086, Australia;Univ Queensland, Sustainable Minerals Inst, Ctr Mined Land Rehabil, Brisbane, Qld 4072, Australia;South China Agr Univ, Coll Agr, Key Lab Plant Mol Breeding Guangdong Prov, Guangzhou 510640, Peoples R China;Chinese Acad Sci, Northeast Inst Geog & Agroecol, Key Lab Mollisols Agroecol, Harbin 150081, Peoples R China
关键词：
teosinte;landraces;inbred lines;domestication and improvement;core microbiome;network
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.
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