Abstract:
:Variations in the patterns of diversity of symbionts have been described worldwide on Mimosa pudica, a pan-tropical invasive species that interacts with both α and β-rhizobia. In this study, we investigated if symbiont competitiveness can explain these variations and the apparent prevalence of β- over α-rhizobia. We developed an indirect method to measure the proportion of nodulation against a GFP reference strain and tested its reproducibility and efficiency. We estimated the competitiveness of 54 strains belonging to four species of β-rhizobia and four of α-rhizobia, and the influence of the host genotype on their competitiveness. Our results were compared with biogeographical patterns of symbionts and host varieties. We found: (i) a strong strain effect on competitiveness largely explained by the rhizobial species, with Burkholderia phymatum being the most competitive species, followed by B. tuberum, whereas all other species shared similar and reduced levels of competitiveness; (ii) plant genotype can increase the competitiveness of Cupriavidus taiwanensis. The latter data support the likelihood of the strong adaptation of C. taiwanensis with the M. pudica var. unijuga and help explain its prevalence as a symbiont of this variety over Burkholderia species in some environments, most notably in Taiwan.
journal_name
Environ Microbioljournal_title
Environmental microbiologyauthors
Melkonian R,Moulin L,Béna G,Tisseyre P,Chaintreuil C,Heulin K,Rezkallah N,Klonowska A,Gonzalez S,Simon M,Chen WM,James EK,Laguerre Gdoi
10.1111/1462-2920.12286subject
Has Abstractpub_date
2014-07-01 00:00:00pages
2099-111issue
7eissn
1462-2912issn
1462-2920journal_volume
16pub_type
杂志文章abstract::Cultures of the non-heterocystous cyanobacterium, Leptolyngbya nodulosa, could be grown indefinitely in media devoid of combined nitrogen. Acetylene reduction assays showed that these cultures fixed nitrogen in the dark period of a diurnal cycle under micro-oxygenic or anaerobic conditions. Addition of DCMU to culture...
journal_title:Environmental microbiology
pub_type: 杂志文章
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journal_title:Environmental microbiology
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pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Environmental microbiology
pub_type: 杂志文章
doi:10.1111/1462-2920.12417
更新日期:2014-05-01 00:00:00
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journal_title:Environmental microbiology
pub_type: 杂志文章
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pub_type: 杂志文章
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journal_title:Environmental microbiology
pub_type: 杂志文章
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journal_title:Environmental microbiology
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journal_title:Environmental microbiology
pub_type: 杂志文章
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更新日期:2010-01-01 00:00:00
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journal_title:Environmental microbiology
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journal_title:Environmental microbiology
pub_type: 杂志文章
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pub_type: 杂志文章
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