Rearranging the sugarcane holobiont via plant growth-promoting bacteria and nitrogen input.

Autor: Leite MFA; Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, the Netherlands; Ecology and Biodiversity, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands., Dimitrov MR; Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, the Netherlands., Freitas-Iório RP; Center of Soil and Environmental Resources, Agronomic Institute (IAC), Campinas, Brazil., de Hollander M; Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, the Netherlands., Cipriano MAP; Center of Soil and Environmental Resources, Agronomic Institute (IAC), Campinas, Brazil., Andrade SAL; Department of Plant Biology, Institute of Biology, State University of Campinas, Campinas, Brazil., da Silveira APD; Center of Soil and Environmental Resources, Agronomic Institute (IAC), Campinas, Brazil., Kuramae EE; Department of Microbial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), Wageningen, the Netherlands; Ecology and Biodiversity, Institute of Environmental Biology, Utrecht University, Utrecht, the Netherlands. Electronic address: e.kuramae@nioo.knaw.nl.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2021 Dec 15; Vol. 800, pp. 149493. Date of Electronic Publication: 2021 Aug 09.
DOI: 10.1016/j.scitotenv.2021.149493
Abstrakt: The development and productivity of plants are governed by their genetic background, nutrient input, and the microbial communities they host, i.e. the holobiont. Accordingly, engineering beneficial root microbiomes has emerged as a novel and sustainable approach to crop production with reduced nutrient input. Here, we tested the effects of six bacterial strains isolated from sugarcane stalks on sugarcane growth and physiology as well as the dynamics of prokaryote community assembly in the rhizosphere and root endosphere under two N fertilization regimes. All six strains, Paraburkholderia caribensis IAC/BECa 88, Kosakonia oryzae IAC/BECa 90, Kosakonia radicincitans IAC/BECa 95, Paraburkholderia tropica IAC/BECa 135, Pseudomonas fluorescens IAC/BECa 141 and Herbaspirillum frisingense IAC/BECa 152, increased in shoot and root dry mass, and influenced the concentration and accumulation of important macro- and micronutrients. However, N input reduced the impact of inoculation by shifting the sugarcane microbiome (rhizosphere and root endosphere) and weakening the co-dependence between soil microbes and sugarcane biomass and nutrients. The results show that these beneficial microbes improved plant nutrient uptake conditioned to a reduced N nutrient input. Therefore, reduced fertilization is not only desirable consequence of bacterial inoculation but essential for higher impact of these beneficial bacteria on the sugarcane microbiome.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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