Abstract:
:Despite the relevance of complex root microbial communities for plant health, growth and productivity, the molecular basis of these plant-microbe interactions is not well understood. Verrucomicrobia are cosmopolitans in the rhizosphere, nevertheless their adaptations and functions are enigmatic since the proportion of cultured members is low. Here we report four cultivated Verrucomicrobia isolated from rice, putatively representing four novel species, and a novel subdivision. The aerobic strains were isolated from roots or rhizomes of Oryza sativa and O. longistaminata. Two of them are the first cultivated endophytes of Verrucomicrobia, as validated by confocal laser scanning microscopy inside rice roots after re-infection under sterile conditions. This extended known verrucomicrobial niche spaces. Two strains were promoting root growth of rice. Discovery of root compartment-specific Verrucomicrobia permitted an across-phylum comparison of the genomic conformance to life in soil, rhizoplane or inside roots. Genome-wide protein domain comparison with niche-specific reference bacteria from distant phyla revealed signature protein domains which differentiated lifestyles in these microhabitats. Our study enabled us to shed light into the dark microbial matter of root Verrucomicrobia, to define genetic drivers for niche adaptation of bacteria to plant roots, and provides cultured strains for revealing causal relationships in plant-microbe interactions by reductionist approaches.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Bünger W,Jiang X,Müller J,Hurek T,Reinhold-Hurek Bdoi
10.1038/s41598-020-65277-6subject
Has Abstractpub_date
2020-05-26 00:00:00pages
8692issue
1issn
2045-2322pii
10.1038/s41598-020-65277-6journal_volume
10pub_type
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