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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Effects of bacterial inoculants on the indigenous microbiome and secondary metabolites of chamomile plants
Frontiers in Microbiology, Volume 5, No. FEB, Article 64, Year 2014
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Description
Plant-associated bacteria fulfill important functions for plant growth and health. However, our knowledge about the impact of bacterial treatments on the host's microbiome and physiology is limited. The present study was conducted to assess the impact of bacterial inoculants on the microbiome of chamomile plants Chamomilla recutita (L.) Rauschert grown in a field under organic management in Egypt. Chamomile seedlings were inoculated with three indigenous Gram-positive strains (Streptomyces subrutilus Wbn2-11, Bacillus subtilis Co1-6, Paenibacillus polymyxa Mc5Re-14) from Egypt and three European Gram-negative strains (Pseudomonas fluorescens L13-6-12, Stenotrophomonas rhizophila P69, Serratia plymuthica 3Re4-18) already known for their beneficial plant-microbe interaction. Molecular fingerprints of 16S rRNA gene as well as real-time PCR analyses did not show statistically significant differences for all applied bacterial antagonists compared to the control. In contrast, a pyrosequencing analysis of the 16S rRNA gene libraries revealed significant differences in the community structure of bacteria between the treatments. These differences could be clearly shown by a shift within the community structure and corresponding beta-diversity indices. Moreover, B. subtilis Co1-6 and P. polymyxa Mc5Re-14 showed an enhancement of the bioactive secondary metabolite apigenin-7-O-glucoside. This indicates a possible new function of bacterial inoculants: to interact with the plant microbiome as well as to influence the plant metabolome. © 2014 Schmidt, Köberl, Mostafa, Ramadan, Monschein, Jensen, Bauer and Berg.
Available Materials
https://efashare.b-cdn.net/share/pmc/articles/PMC3928675/bin/DataSheet1.DOCX
Authors & Co-Authors
Schmidt, Ruth L.
Austria, Graz
Technische Universitat Graz
Köberl, Martina
Austria, Graz
Technische Universitat Graz
Mostafa, Amr
Egypt, Dar el Salam
Heliopolis University
Ramadan, Elshahat Mohamed
Egypt, Dar el Salam
Heliopolis University
Monschein, Marlene
Austria, Graz
Universität Graz
Jensen, Kenneth Bendix
Austria, Graz
Universität Graz
Bauer, Rudolf F.X.
Austria, Graz
Universität Graz
Berg, Gabriele
Austria, Graz
Technische Universitat Graz
Statistics
Citations: 115
Authors: 8
Affiliations: 3
Identifiers
Doi:
10.3389/fmicb.2014.00064
e-ISSN:
1664302X
Research Areas
Genetics And Genomics
Study Locations
Egypt