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Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development
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SYSNO ASEP 0524376 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Under the Christmas Tree: Belowground Bacterial Associations With Abies nordmanniana Across Production Systems and Plant Development Author(s) Garcia-Lemos, A. M. (DK)
Gobbi, A. (DE)
Nicolaisen, M. H. (DK)
Hansen, L. H. (DK)
Roitsch, Thomas (UEK-B) RID, ORCID, SAI
Veierskov, B. (DK)
Nybroe, O. (DK)Number of authors 7 Article number 198 Source Title Frontiers in Microbiology. - : Frontiers Research Foundation - ISSN 1664-302X
Roč. 11, MAR 2020 (2020)Number of pages 17 s. Language eng - English Country CH - Switzerland Keywords microbial community ; denitrifier abundance ; fungal communities ; wilt disease ; peat soils ; rhizosphere ; diversity ; ecology ; emissions ; cultivars ; a ; nordmanniana ; Christmas trees ; rhizosphere ; beneficial bacteria ; microbiome ; nitrogen cycling ; nitrogen-fixing bacteria ; denitrifying bacteria Subject RIV EE - Microbiology, Virology OECD category Microbiology R&D Projects LO1415 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UEK-B - RVO:86652079 UT WOS 000524527700001 EID SCOPUS 85082723540 DOI 10.3389/fmicb.2020.00198 Annotation Abies nordmanniana is an economically important tree crop widely used for Christmas tree production. After initial growth in nurseries, seedlings are transplanted to the field. Rhizosphere bacterial communities generally impact the growth and health of the host plant. However, the dynamics of these communities during A. nordmanniana growth in nurseries, and during transplanting, has not previously been addressed. By a 16S rRNA gene amplicon sequencing approach, we characterized the composition and dynamics of bacterial communities in the rhizosphere during early plant growth in field and greenhouse nurseries and for plants transplanted from the greenhouse to the field. Moreover, the N-cycling potential of rhizosphere bacteria across plant age was addressed in both nurseries. Overall, a rhizosphere core microbiome of A. nordmanniana, comprising 19.9% of the taxa at genus level, was maintained across plant age, nursery production systems, and even during the transplantation of plants from the greenhouse to the field. The core microbiome included the bacterial genera Bradyrhizobium, Burkholderia, Flavobacterium, Pseudomonas, Rhizobium, Rhodanobacter, and Sphingomonas, which harbor several N-fixing and plant growth-promoting taxa. Nevertheless, both plant age and production system caused significant changes in the rhizosphere bacterial communities. Concerning community composition, the relative abundance of Rhizobiales (genera Rhizobium, Bradyrhizobium, and Devosia) was higher in the rhizosphere of field-grown A. nordmanniana, whereas the relative abundance of Enterobacteriales and Pseudomonadales (genus Pseudomonas) was higher in the greenhouse. Analysis of community dynamics across plant age showed that in the field nursery, the most abundant bacterial orders showed more dynamic changes in their relative abundance in the rhizosphere than in the bulk soil. In the greenhouse, age-dependent dynamics even occurred but affected different taxa than for the field-grown plants. The N-cycling potential of rhizosphere bacterial communities showed an increase of the relative abundance of genes involved in nitrogen fixation and denitrification by plant age. Similarly, the relative abundance of reported nitrogen-fixing or denitrifying bacteria increased by plant age. However, different community structures seemed to lead to an increased potential for nitrogen fixation and denitrification in the field versus greenhouse nurseries. Workplace Global Change Research Institute Contact Nikola Šviková, svikova.n@czechglobe.cz, Tel.: 511 192 268 Year of Publishing 2021 Electronic address https://www.frontiersin.org/articles/10.3389/fmicb.2020.00198/full
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