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Root-Associated Microbial Communities of Abies nordmanniana: Insights Into Interactions of Microbial Communities With Antioxidative Enzymes and Plant Growth
- Source :
- Frontiers in Microbiology, Vol 10 (2019), Garcia-Lemos, A M, Großkinsky, D K, Stokholm, M S, Lund, O S, Nicolaisen, M H, Roitsch, T G, Veierskov, B & Nybroe, O 2019, ' Root-Associated Microbial Communities of Abies nordmanniana : Insights Into Interactions of Microbial Communities With Antioxidative Enzymes and Plant Growth ', Frontiers in Microbiology, vol. 10, 1937, pp. 1-16 . https://doi.org/10.3389/fmicb.2019.01937
- Publication Year :
- 2019
- Publisher :
- Frontiers Media S.A., 2019.
-
Abstract
- Abies nordmanniana is a major Christmas tree species in Europe, but their uneven and prolonged growth slows down their production. By a 16S and 18S rRNA gene amplicon sequencing approach, we performed a characterization of root-associated bacterial and fungal communities for three-year-old A. nordmanniana plants collected from two nurseries in Denmark and Germany and displaying different growth patterns (small versus tall plants). Proteobacteria had the highest relative abundance at both sampling sites and plant sizes, and Ascomycota was the most abundant fungal phylum. At the order level, Acidobacteriales, Actinomycetales, Burkholderiales, Rhizobiales, and Xanthomonadales represented the bacterial core microbiome of A. nordmanniana, independently of the sampling site or plant size, while the fungal core microbiome included members of the Agaricales, Hypocreales, and Pezizales. Principal Coordinate Analysis indicated that both bacterial and fungal communities clustered according to the sampling site pointing to the significance of soil characteristics and climatic conditions for the composition of root-associated microbial communities. Major differences between communities from tall and small plants were a dominance of the potential pathogen Fusarium (Hypocreales) in the small plants from Germany, while Agaricales, that includes reported beneficial ectomycorrhizal fungi, dominated in the tall plants. An evaluation of plant root antioxidative enzyme profiles showed higher levels of the antioxidative enzymes ascorbate peroxidase, peroxidase, and superoxide dismutase in small plants compared to tall plants. We suggest that the higher antioxidative enzyme activities combined with the growth arrest phenotype indicate higher oxidative stress levels in the small plants. Additionally, the correlations between the relative abundances of specific taxa of the microbiome with the plant antioxidative enzyme profiles were established. The main result was that many more bacterial taxa correlated positively than negatively with one or more antioxidative enzyme activity. This may suggest that the ability of bacteria to increase plant antioxidative enzyme defenses is widespread.
- Subjects :
- Microbiology (medical)
Hypocreales
lcsh:QR1-502
antioxidative enzymes
Biology
Microbiology
Antioxidative enzymes
Rhizobiales
lcsh:Microbiology
03 medical and health sciences
Fusarium
Botany
Root-associated microbial communities
Microbiome
Pezizales
030304 developmental biology
Plant growth
0303 health sciences
Ascomycota
030306 microbiology
fungi
food and beverages
plant growth
biology.organism_classification
Burkholderiales
root-associated microbial communities
Abies nordmanniana
Proteobacteria
Agaricales
Subjects
Details
- Language :
- English
- Volume :
- 10
- Database :
- OpenAIRE
- Journal :
- Frontiers in Microbiology
- Accession number :
- edsair.doi.dedup.....1e3610908fcdd20b337e50aeb2b8f6d0