Definition of the novel symbiovar canariense within Mesorhizobium neociceri sp. nov., a new species of genus Mesorhizobium nodulating Cicer canariense in the “Caldera de Taburiente” National Park (La Palma, Canary Islands)

León-Barrios, Milagros; Flores-Félix, José-David; Pérez-Yépez, Juan; Ramírez-Bahena, Marta-Helena; Pulido-Suárez, Laura; Igual, José Mariano; Velázquez, Encarna; Peix, Álvaro

doi:10.1016/j.syapm.2021.126237

Cited by 14 publications

(2 citation statements)

References 32 publications

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“…As observed in the present study, the nifH gene phylogeny does not always correspond with the nodC phylogeny. In such scenarios, only the nodC phylogeny results should be considered to delineate symbiovars (Peix et al 2015;León-Barrios et al 2021). However, in the present study, the phylogenies of both the nodC and nifH genes confirmed the affiliation of the fenugreek rhizobia to sv.…”

Section: Phylogeneticscontrasting

confidence: 44%

Phylogenetic diversity and plant growth-promoting activities of rhizobia nodulating fenugreek (Trigonella foenum-graecumLinn.) cultivated in different agroclimatic regions of India

Khairnar

Hagir

Parmar

et al. 2022

FEMS Microbiology Ecology

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Fenugreek (Trigonella foenum-graecum Linn.), is an extensively cultivated legume crop used as a herb, spice, and traditional medicine in India. The symbiotic efficiency and plant growth-promoting potential of fenugreek rhizobia depend on the symbiont strain and environmental factors. We isolated 176 root-nodulating bacteria from fenugreek cultivated in different agroclimatic regions of India. MALDI-TOF MS-based identification and phylogenetic analyses based on 16S rRNA and five housekeeping genes classified the fenugreek-rhizobia as Ensifer (Sinorhizobium) meliloti. However, the strains represent separate sub-lineages of E. meliloti, distinct from all reported sub-lineages across the globe. We also observed the spatial distribution of fenugreek rhizobia, as the three sub-lineages of E. meliloti recorded during this study were specific to their respective agroclimatic regions. According to the symbiotic gene (nodC and nifH) phylogenies, all three sub-lineages of E. meliloti harboured symbiotic genes similar to symbiovar meliloti; as with the housekeeping genes, these also revealed a spatial distribution for different clades of sv. meliloti. The strains could nodulate fenugreek plants and they showed plant growth-promoting potential. Significant differences were found in the plant growth parameters in response to inoculation with the various strains, suggesting strain-level differences. This study demonstrates that fenugreek rhizobia in India are diverse and spatially distributed in different agro-climatic regions.

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Section: Phylogeneticscontrasting

confidence: 44%

Phylogenetic diversity and plant growth-promoting activities of rhizobia nodulating fenugreek (Trigonella foenum-graecumLinn.) cultivated in different agroclimatic regions of India

Khairnar

Hagir

Parmar

et al. 2022

FEMS Microbiology Ecology

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show abstract

“…astragalus/caraganae have been used to label clades in a nodC phylogeny [ 55 ], but the authors did not describe them in the text, so we consider that they did not define these potential symbiovars and we have not included the names in Table 1 . Several later publications have repeated the names [ 41 42 56 ], but still with no formal definition.…”

Section: Considerations For a Stable Classification Of Symbiovarsmentioning

confidence: 99%

Guidelines for the description of rhizobial symbiovars

Martinez-Romero,

Peix,

Hungria

et al. 2024

International Journal of Systematic and Evolutionary Microbiology

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Rhizobia are bacteria that form nitrogen-fixing nodules in legume plants. The sets of genes responsible for both nodulation and nitrogen fixation are carried in plasmids or genomic islands that are often mobile. Different strains within a species sometimes have different host specificities, while very similar symbiosis genes may be found in strains of different species. These specificity variants are known as symbiovars, and many of them have been given names, but there are no established guidelines for defining or naming them. Here, we discuss the requirements for guidelines to describe symbiovars, propose a set of guidelines, provide a list of all symbiovars for which descriptions have been published so far, and offer a mechanism to maintain a list in the future.

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Understanding the Diversity and Evolution of Rhizobia from a Genomic Perspective

Klepa,

Helene,

Hungria

2024

Microbial Diversity in the Genomic Era

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Definition of the novel symbiovar canariense within Mesorhizobium neociceri sp. nov., a new species of genus Mesorhizobium nodulating Cicer canariense in the “Caldera de Taburiente” National Park (La Palma, Canary Islands)

Cited by 14 publications

References 32 publications

Phylogenetic diversity and plant growth-promoting activities of rhizobia nodulating fenugreek (Trigonella foenum-graecumLinn.) cultivated in different agroclimatic regions of India

Phylogenetic diversity and plant growth-promoting activities of rhizobia nodulating fenugreek (Trigonella foenum-graecumLinn.) cultivated in different agroclimatic regions of India

Guidelines for the description of rhizobial symbiovars

Understanding the Diversity and Evolution of Rhizobia from a Genomic Perspective

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