Symbiotic properties of Methylobacterium nodulans ORS 2060T: A classic process for an atypical symbiont

Renier, Adeline; Jourand, Philippe; Rapior, Sylvie; Poinsot, Véréna; Sy, Abdoulaye; Dreyfus, B; Moulin, Lionel

doi:10.1016/j.soilbio.2007.12.020

Cited by 26 publications

(11 citation statements)

References 36 publications

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“…The nodA sequence-based separation of nodulating Burkholderia species is in agreement with previous findings [9], [11], [18], [35], [87], that the South African nodule isolates group with Methylobacterium nodulans (isolated in Senegal from Crotolaria podocarpa ; [88]) and with species in the genus Bradyrhizobium . The phylogenetic association of nodulating South African Burkholderia with these alpha-rhizobia is supported by the finding that the respective nodA genes of B. tuberum , M. nodulans and Bradyrhizobium all encode a protein with an unexpectedly long N-terminal [35], [82].…”

Section: Discussionsupporting

confidence: 91%

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

et al. 2013

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The root-nodule bacteria of legumes endemic to the Cape Floristic Region are largely understudied, even though recent reports suggest the occurrence of nodulating Burkholderia species unique to the region. In this study, we considered the diversity and evolution of nodulating Burkholderia associated with the endemic papilionoid tribes Hypocalypteae and Podalyrieae. We identified distinct groups from verified rhizobial isolates by phylogenetic analyses of the 16S rRNA and recA housekeeping gene regions. In order to gain insight into the evolution of the nodulation and diazotrophy of these rhizobia we analysed the genes encoding NifH and NodA. The majority of these 69 isolates appeared to be unique, potentially representing novel species. Evidence of horizontal gene transfer determining the symbiotic ability of these Cape Floristic Region isolates indicate evolutionary origins distinct from those of nodulating Burkholderia from elsewhere in the world. Overall, our findings suggest that Burkholderia species associated with fynbos legumes are highly diverse and their symbiotic abilities have unique ancestries. It is therefore possible that the evolution of these bacteria is closely linked to the diversification and establishment of legumes characteristic of the Cape Floristic Region.

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Section: Discussionsupporting

confidence: 91%

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

et al. 2013

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“…The genus Methylobacterium (Methylobacteriaceae) is best known for using methanol or other C1 compounds as a sole source of carbon for growth, but no association with plant root nodules had been described until a species of the genus was reported to nodulate Crotalaria podocarpa, Crotalaria perrotteti, and Crotalaria glaucoides (Sy et al 2001). This report was followed by a thorough study in which the nodDABCUIJHQ cluster was amplified (Renier et al 2008).…”

Section: Rhizobial and Nonrhizobial Bacteria That Fix Nitrogen And Nomentioning

confidence: 99%

The Nodule Microbiome: N₂-Fixing Rhizobia Do Not Live Alone

Martínez‐Hidalgo

Hirsch

2017

Phytobiomes Journal

227

163

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For decades, rhizobia were thought to be the only nitrogen-fixing inhabitants of legume nodules, and biases in culture techniques prolonged this belief. However, other bacteria, which are not typical rhizobia, are often detected within nodules obtained from soil, thus revealing the existence of a phytomicrobiome where the interaction among the individuals is not only complex, but also likely to affect the behavior and fitness of the host plant. Many of these nonrhizobial bacteria are nitrogen fixers, and some also induce nitrogen-fixing nodules on legume roots. Even more striking is the incredibly diverse population of bacteria residing within nodules that elicit neither nodulation nor nitrogen fixation. Yet, this community exists within the nodule, albeit clearly out-numbered by nitrogen-fixing rhizobia. Few studies of the function of these nodule-associated bacteria in nodules have been performed, and to date, it is not known whether their presence in nodules is biologically important or not. Do they confer any benefits to the Rhizobium-legume nitrogen-fixing symbiosis, or are they parasites/saprophytes, contaminants, or commensals? In this review, we highlight the lesser-known bacteria that dwell within nitrogen-fixing nodules and discuss their possible role in this enclosed community as well as any likely benefits to the host plant or to the rhizobial inhabitants of the nodule. Although many of these nodule inhabitants are not capable of nitrogen fixation, they have the potential to enhance legume survival especially under conditions of environmental stress. This knowledge will be useful in defining strategies to employ these bacteria as bioinoculants by themselves or combined with rhizobia. Such an approach will enhance rhizobial performance or persistence as well as decrease the usage of chemical fertilizers and pesticides.

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“…The relationship of M. nodulans with C. podocarpa is symbiotic as it is specifically nodulated by M. nodulans. The molecular signals in this association was studied by Renier et al (2008) who reported that the flavonoid apigenin was the strongest inducer of nod gene expression and the Nod factor structure was composed of a pentamer of chitin substituted by C18:1 or C16:0 acyl chain on the non-reducing end and 6-O-sulphated on the other end.…”

Section: Methylobacteriummentioning

confidence: 99%

Novel plant growth promoting rhizobacteria—Prospects and potential

Chauhan¹,

Bagyaraj²,

Selvakumar

et al. 2015

Applied Soil Ecology

188

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Symbiotic properties of Methylobacterium nodulans ORS 2060T: A classic process for an atypical symbiont

Cited by 26 publications

References 36 publications

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

The Nodule Microbiome: N₂-Fixing Rhizobia Do Not Live Alone

Novel plant growth promoting rhizobacteria—Prospects and potential

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Symbiotic properties of Methylobacterium nodulans ORS 2060T: A classic process for an atypical symbiont

Cited by 26 publications

References 36 publications

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

South African Papilionoid Legumes Are Nodulated by Diverse Burkholderia with Unique Nodulation and Nitrogen-Fixation Loci

The Nodule Microbiome: N2-Fixing Rhizobia Do Not Live Alone

Novel plant growth promoting rhizobacteria—Prospects and potential

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The Nodule Microbiome: N₂-Fixing Rhizobia Do Not Live Alone