Rhizoglomus intraradices and associated Brevibacterium frigoritolerans enhance the competitive growth of Flaveria bident
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Rhizoglomus intraradices and associated Brevibacterium frigoritolerans enhance the competitive growth of Flaveria bidentis Ewei Du & Xue Chen & Qiao Li & Fengxin Chen & Haiyun Xu & Fengjuan Zhang
Received: 11 January 2020 / Accepted: 5 June 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Our aim was to determine whether there is a synergistic interaction between the arbuscular mycorrhizal (AM) fungus Rhizoglomus intraradices and the bacterium Brevibacterium frigoritolerans, and to understand how R. intraradices and B. frigoritolerans affect the competitive growth of Flaveria bidentis (L.) Kuntze in nutrient-deficient soil. Methods Pot culture of F. bidentis and Eclipta prostrata (L.) L. under nutrient-limited soil conditions was used to test the effect of R. intraradices and B. frigoritolerans on the competitive growth of F. bidentis. Results Inoculation with B. frigoritolerans and coinoculation with R. intraradices and B. frigoritolerans
increased the biomass of F. bidentis, and a single inoculation of B. frigoritolerans gave E. prostrata a competitive advantage over F. bidentis. However, we found higher R. intraradices colonization of exotic F. bidentis roots than native E. prostrata roots. Conclusions R. intraradices and B. frigoritolerans probably play different roles in the invasion of F. bidentis. R. intraradices may give the invader a competitive advantage through the accumulation of higher foliar levels of N, and B. frigoritolerans may facilitate the uptake of available N from the soil. Therefore, the results support the hypothesis that the AM fungus-soil bacteria cooperation makes N available to F. bidentis and facilitates its competitive growth.
Ewei Du and Xue Chen contributed equally to this work. Responsible Editor: Felipe E. Albornoz. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04594-1) contains supplementary material, which is available to authorized users. E. Du : X. Chen : H. Xu (*) : F. Zhang (*) College of Life Science, Hebei University, Baoding 071002 Hebei, China e-mail: [email protected] e-mail: [email protected] Q. Li State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection Chinese Academy of
Agricultural Sciences, Beijing 100081, China F. Chen College of Economy, Hebei University, Baoding 071002 Hebei, China
Plant Soil
Keywords Arbuscular mycorrhizal fungi . Bacteria . Rhizosphere . Invasion . Competitive advantage Abbreviations AM Arbuscular mycorrhizal ANOVA Analysis of variance BF inoculated with Brevibacterium frigoritolerans CK uninoculated treatment used as the control RI inoculated with Rhizoglomus intraradices CAAS Chinese Academy of Agricultural Science CRCI Corrected index of relative competition intensity PCA principal component analysis
Introduction In recent years, soil microbes have commonly been believed to contribute to the success of invasive species (Callaway and Ridenour 2004; Kulmatiski et al. 2008; Rudgers and Orr 2009; Dickie e
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