Plant resistance and leaf chemical characteristic jointly shape phyllosphere bacterial community
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(2020) 36:139
ORIGINAL PAPER
Plant resistance and leaf chemical characteristic jointly shape phyllosphere bacterial community Tian Xueliang1 · Xu Dan2 · Sun Tingting1 · Zhao Songyu1 · Li Ying3 · Wang Diandong2 Received: 5 April 2020 / Accepted: 31 July 2020 © Springer Nature B.V. 2020
Abstract Phyllosphere bacteria have an important role in plant growth and resistance to pathogen infection and are partially influenced by plant genotype and leaf environment. How plant resistance to pathogens and leaf chemical characteristics shape the phyllosphere bacterial communities is unclear. In this study, the phyllosphere bacterial communities of maize hybrids with various resistance to Setosphaeria turcica were compared using the high-throughput sequencing and large-scale culturing methods. The results showed that Shannon and Simpson indices of phyllosphere bacterial communities were markedly higher in the highly resistant hybrid (HR) compared with the susceptible one. Hierarchical clustering analysis, unweighted UniFrac principal component analysis (PCoA) and the analysis of similarities (ANOSIM) demonstrated that the phyllosphere bacterial communities were significantly distinct between resistant and susceptible hybrids. The redundancy analysis (RDA) demonstrated that leaf chemical characteristics, including nitrogen and phosphorus concentration, and disease resistance play an important role in shaping the phyllosphere bacterial community. Linear discriminant effect size (LEfSe) analysis indicated that Bacillus, Pseudomonas and Tumebacillus were the biomarker species in the phyllosphere of HR. Biocontrol bacteria against S. turcica (such as Pseudomonas and Bacillus) were isolated from the phyllosphere of HR by large-scale culturing. The work contributes to understanding of the phyllosphere bacterial community assembly and provides a new clue to screening for strong biocontrol bacteria from HR and to facilitating future breeding efforts for enhancing disease resistance.
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11274-020-02908-0) contains supplementary material, which is available to authorized users. * Wang Diandong [email protected] 1
Henan Institute of Science and Technology, Xinxiang 453003, People’s Republic of China
2
Yangtze Normal University, Fuling, Chongqing 408100, People’s Republic of China
3
Beihua University, Jilin 132013, People’s Republic of China
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World Journal of Microbiology and Biotechnology
(2020) 36:139
Graphic abstract
Keywords Phyllosphere bacteria · Plant resistance · Leaf chemical characteristic · Setosphaeria turcica · Maize
Introduction The phyllosphere microbes consist of bacteria, fungi and other microorganisms that inhabit plant foliage. It is estimated that bacteria are the most abundant microbes on leaf surfaces, with a population of 1 08 cells per cm2 (Leveau 2006). The phyllosphere bacteria play important beneficial roles in the plant. For example, phyllosphere
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