Comparative symbiotic plasmid analysis indicates that symbiosis gene ancestor type affects plasmid genetic evolution

Wang, X.; Zhao, Liang; Zhang, Long; Wu, Yunfeng; Chou, Ming-Yi

doi:10.1111/lam.12998

Cited by 8 publications

(7 citation statements)

References 38 publications

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“…Some prominent examples include the ability to undergo anoxygenic photosynthesis in marine bacteria of the Rhodobacteriaceae family 20 , and the metabolic plasmids of the aphid endosymbiont Buchnera aphidicola, which are responsible for synthesizing essential amino acids and vitamins required for the bacterium-aphid symbiotic relationship, and have had a key role in the transition of B. aphidicola from free-living to obligate endosymbiont 21 . These examples, and several others 22,23 , highlight the crucial importance of plasmid traits for the diversity of bacterial lifestyles.…”

Section: [H1] Anatomy Of Plasmids [H2] Plasmid Prevalence and Typesmentioning

confidence: 90%

“…Expression of plasmid umuDC genes is tightly controlled as part of the bacterial SOS response and leads to transient mutagenesis upon plasmid transfer 110 . For instance, rizhobial symbiotic plasmids encode complex traits that mediate the relationship between legume plants and bacteria 23 . These plasmids frequently encode UmuDC homologues that boost the mutation rate of the bacterial host upon entry 111 .…”

Section: [H1] Further Plasmid Effects On Evolutionmentioning

confidence: 99%

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Beyond horizontal gene transfer: the role of plasmids in bacterial evolution

et al. 2021

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Plasmids have a key role in bacterial ecology and evolution because they mobilize accessory genes by horizontal gene transfer. However, recent studies have revealed that the evolutionary impact of plasmids goes above and beyond being mere gene delivery platforms. Plasmids are usually kept at multiple copies per cell, producing islands of polyploidy in the bacterial genome. As a consequence, the evolution of plasmid-encoded genes is governed by a different set of rules than those affecting chromosomal genes, and these rules are shaped by unusual concepts in bacterial genetics such as genetic dominance, heteroplasmy or segregational drift. In this Review, we discuss recent advances that underscore the importance of plasmids in bacterial ecology and evolution beyond horizontal gene transfer. We focus on new evidence that suggests that plasmids might accelerate bacterial evolution, mainly by promoting the evolution of plasmid-encoded genes, but also by enhancing the adaptation of their host chromosome. Finally, we integrate the most relevant

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Section: [H1] Anatomy Of Plasmids [H2] Plasmid Prevalence and Typesmentioning

confidence: 90%

Section: [H1] Further Plasmid Effects On Evolutionmentioning

confidence: 99%

Beyond horizontal gene transfer: the role of plasmids in bacterial evolution

et al. 2021

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“…Therefore, the transferal of symbiotic tools into different rhizobial strains may be achieved if recipient strains have a close phylogenetically background with the donor strains. However, successful symbiosis requires the two partners to be compatible with each other in every stage of the development of symbiosis ( Wang et al , 2018 ). Host-specific adaptation argues against the environmental need for bacteroids in which specific genes are transcribed and translated.…”

Section: Discussionmentioning

confidence: 99%

Symbiosis Contribution of Non-nodulating <i>Bradyrhizobium cosmicum</i> S23321 after Transferal of the Symbiotic Plasmid pDOA9

et al. 2022

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The symbiotic properties of rhizobial bacteria are driven by the horizontal gene transfer of symbiotic genes, which are located in symbiosis islands or on plasmids. The symbiotic megaplasmid pDOA9 of Bradyrhizobium sp. DOA9, carrying the nod , nif , fix , and type three secretion system (T3SS) genes, has been conjugatively transferred to different Bradyrhizobium strains. In the present study, non-nodulating B. cosmicum S23321, which shows a close phylogenetic relationship with Bradyrhizobium sp. DOA9, but lacks symbiotic properties, was used to carry pDOA9 (annotated as chimeric S2:pDOA9). The results obtained showed that pDOA9 conferred symbiotic properties on S23321; however, nodulation phenotypes varied among the DOA9, chimeric ORS278:pDOA9, and S2:pDOA9 strains even though they all carried symbiotic pDOA9 plasmid. S23321 appeared to gain symbiotic nodulation from pDOA9 by processing nodulation genes and broadening the host range. The present results also showed the successful formation of active nodules in Arachis hypogaea (Dalbergoid) and Vigna radiata (Millitoid) by chimeric S2:pDOA9, while Crotalaria juncea (Genistoid) and Macroptilium atropurpureum (Millitoid) formed nodule-like structures. The formation of nodules and nodule-like structures occurred in a nod factor-dependent manner because the nod factor-lacking strain (S2:pDOA9Ω nodB ) completely abolished nodulation in all legumes tested. Moreover, T3SS carried by S2:pDOA9 exerted negative effects on symbiosis with Crotalaria juncea , which was consistent with the results obtained on DOA9. T3SS exhibited symbiotic compatibility with V. radiata when nodulated by S23321. These outcomes implied that pDOA9 underwent changes during legume evolution that broadened host specificity and the compatibility of nodulation in a manner that was dependent on the chromosomal background of the recipient as well as legume host restrictions.

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“…They belong to the superfamily Rhizobiaceae in the alphaproteobacterial superphylum consisting of phenotypically diverse member genera such as Bradyrhizobium , Ensifer (formerly Sinorhizobium ), Mesorhizobium , and Rhizobium ( 1 ). The mosaic structure of their symbiotic genome compartments could give rise to several rhizobial species colonizing diverse plant hosts, which may have arisen through lateral gene transfer of symbiotic genes ( 2 , 3 ).…”

Section: Announcementmentioning

confidence: 99%