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Tomasz Stępkowski

Researcher at Warsaw University of Life Sciences

Publications -  37
Citations -  1524

Tomasz Stępkowski is an academic researcher from Warsaw University of Life Sciences. The author has contributed to research in topics: Bradyrhizobium & Lupinus. The author has an hindex of 19, co-authored 37 publications receiving 1319 citations. Previous affiliations of Tomasz Stępkowski include Polish Academy of Sciences.

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Phylogenetic analyses of symbiotic nodulation genes support vertical and lateral gene co-transfer within the Bradyrhizobium genus.

TL;DR: PCR amplification, sequencing and phylogenetic analysis of nodA gene sequences revealed the monophyletic character with the possible exception of photosynthetic Bradyrhizobium, despite high sequence diversity, and indicated that the spread and maintenance of nodulation genes within the Bradyrnobia genus occurred through vertical transmission, although lateral gene transfer also played a significant role.
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European Origin of Bradyrhizobium Populations Infecting Lupins and Serradella in Soils of Western Australia and South Africa

TL;DR: The data suggest that the lupin and serradella strains, including the strains from uncultivated L. cosentinii plants, are descendants of strains that most likely were brought from Europe accidentally with l upin andserradella seeds.
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Diversification of Lupine Bradyrhizobium Strains: Evidence from Nodulation Gene Trees

TL;DR: It is suggested that clade II diversified predominately in the Old World, possibly in the Mediterranean, and evidence is presented that the noeI gene may not be required for nodulation of lupine and that loss of this gene is occurring.
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The Variable Part of the dnaK Gene as an Alternative Marker for Phylogenetic Studies of Rhizobia and Related Alpha Proteobacteria

TL;DR: In this paper, the α-subdomain of the substrate-binding domain of DnaK was used for phylogenetic analysis of rhizobia and related non-symbiotic alpha-Proteobacteria.