Evolution and Taxonomy of Nitrogen‐Fixing Organisms with Emphasis on Rhizobia

Lindström, Kristina; Aserse, Aregu Amsalu; Mousavi, Seyed Abdollah

doi:10.1002/9781119053095.ch3

Cited by 28 publications

(16 citation statements)

References 58 publications

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“…Multilocus sequence analysis (MLSA) encompassing combined analysis of several housekeeping genes has been widely used in studies with bradyrhizobia (e.g. Stępkowski et al 2005;Menna et al 2009;Lindström et al 2015;Kalita and Małek 2017). In our studies, the Bootstrap values based on 1000 replicates >70% are indicated at the branching points.…”

Section: Discussionmentioning

confidence: 99%

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Bradyrhizobia associated with Laburnum anagyroides, an exotic legume grown in Poland

Sajnaga

Jach

2020

Symbiosis

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We isolated 18 rhizobial strains from root nodules of a leguminous shrub Laburnum anagyroides (common laburnum) grown in Southeast Poland as an exotic plant. With the use of BOX-PCR fingerprinting, the isolates were clustered into 2 main groups and one separate lineage, which was congruent with the ITS-RFLP results. The phylogenetic trees constructed based on 16S rRNA and combined atpD, dnaK, glnA, and recA gene sequence data separated the representative strains into three evolutionary lineages within the Bradyrhizobium jicamae supergroup, with Bradyrhizobium algeriense and Bradyrhizobium valentinum as the closest relatives. The nodA and nifH gene phylogenies proved that the L. anagyroides symbionts carry a symbiotic gene variant known as Clade IV, representing the symbiovar retamae. Phenotypic characteristics of the isolates and reference strains are also reported. Our study of the rhizobia nodulating L. anagyroides growing in Poland complements earlier few findings on the symbiotic associations of this Genisteae species.

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Section: Discussionmentioning

confidence: 99%

“…Bacteria of the genus Bradyrhizobium (Jordan 1982) and at least 11 other rhizobial genera participate in the process of N 2fixing symbiosis with legume plants classified in the family Fabaceae (Lindström et al 2015;Shamseldin et al 2017). They can establish symbiosis with all major legume lineages of Fabaceae spp.…”

Section: Introductionmentioning

confidence: 99%

Bradyrhizobia associated with Laburnum anagyroides, an exotic legume grown in Poland

Sajnaga

Jach

2020

Symbiosis

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“…Zu Beginn der 80er Jahre des letzten Jahrhunderts erfolgte die Abspaltung der Gattung Bradyrhizobium ("bradus" ist die griechischen Bezeichnung für langsam), wobei das augenfälligste Merkmal, das langsame Wachstum, namensgebend war. Waren zu Beginn der Rhizobienforschung nur wenige Arten bekannt, die auch heute noch intensiv erforscht werden, so sind heute bei steigender Tendenz mehr als 100 Arten beschrieben [7].…”

Section: Die Knöllchenbakterien Wurden Vor 130 Jahren Entdecktunclassified

Knöllchenbakterien: Helfer der Landwirtschaft

Zehner

Göttfert

2015

Biologie in unserer Zeit

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In diesem Jahr wurde das Knöllchenbakterium durch die VAAM zur “Mikrobe des Jahres” gekürt. Knöllchenbakterium ist ein Sammelbegriff für eine Vielzahl unterschiedlicher Arten, die in der Lage sind, mit Leguminosen eine Wurzelknöllchensymbiose einzugehen. Während der Symbiose sind die zu Bacteroiden differenzierten Bakterien mit einer weiteren Membran umhüllt und sie leben in großer Zahl in Zellen des Knöllchens. Sie fixieren Luftstickstoff, der von den Pflanzen genutzt wird. Im Gegenzug müssen sie komplett von der Pflanze versorgt werden. Die Symbiose wird durch einen Signalaustausch zwischen den Symbiosepartnern initiiert. Die ersten spezifischen Signale werden von der Pflanze im Wurzelraum abgegeben. Es sind Flavonoide, die die Bakterien zur Bildung von Nod‐Faktoren anregen, die wiederum Signale für die Pflanze sind. Neben dieser bei fast allen Rhizobien vorhandenen Grundausstattung sind bei allen Rhizobien extrazelluläre Moleküle in wechselnder Zusammensetzung an der Etablierung der Symbiose beteiligt.

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“…The genus Rhizobium is a large group of bacteria, and most species are known for their symbiotic fixation of nitrogen within the root nodules of leguminous plants. The family Rhizobiaceae has now been classified into 16 genera [1,2]. Rhizobium is one of the main genera in the family Rhizobiaceae, and it was first proposed in 1889 [3,4].…”

Section: Introductionmentioning

confidence: 99%

Rhizobium desertarenaesp. nov., isolated from the Saline Desert Soil from the Rann of Kachchh, India

Khairnar

Hagir

Narayan

et al. 2020

Preprint

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AbstractA novel bacterial strain designated ADMK78T was isolated from the saline desert soil. The cells were rod-shaped, Gram-negative, and non-motile. The strain ADMK78T grows best at 28°C and pH 7.0 and can tolerate up to 2% (w/v) NaCl. Based on 16S rRNA gene phylogeny, the strain ADMK78T belongs to the genus Rhizobium, with the highest similarity to Rhizobium wuzhouense W44T (98.7%) and Rhizobium ipomoeae shin9-1T (97.9%). Core-genes based phylogenetic analysis revealed that the strain ADMK78T forms a distinct branch in between Rhizobium ipomoeae shin9-1T and Rhizobium selenitireducens BAA-1503T. The average nucleotide identity of ADMK78T was less than 82%, to members of the family Rhizobiaceae. The genomic DNA G+C content of strain ADMK78T is 58.6 mol%. The major fatty acids of strain ADMK78T were C18:0 and C18:1 ω7c. The strain ADMK78T showed differences in physiological, phenotypic, and protein profiles estimated by MALDI-TOF MS to its closest relatives. Based on the phenotypic, chemotaxonomic properties, and phylogenetic analyses, the strain ADMK78T could be distinguished from the recognized species of the genus Rhizobium. It is suggested to represent a novel species of this genus, for which the name Rhizobium desertarenae sp. nov. is proposed. The type strain is ADMK78T (=MCC 3400T; KACC 21383T; JCM 33657T).

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Evolution and Taxonomy of Nitrogen‐Fixing Organisms with Emphasis on Rhizobia

Cited by 28 publications

References 58 publications

Bradyrhizobia associated with Laburnum anagyroides, an exotic legume grown in Poland

Bradyrhizobia associated with Laburnum anagyroides, an exotic legume grown in Poland

Knöllchenbakterien: Helfer der Landwirtschaft

Rhizobium desertarenaesp. nov., isolated from the Saline Desert Soil from the Rann of Kachchh, India

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