T
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
Tomasz Stępkowski,Lionel Moulin,Agnieszka Krzyżańska,Alison McInnes,Ian J. Law,John Howieson +5 more
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
Tomasz Stępkowski,Colin E. Hughes,Ian J. Law,Łukasz Markiewicz,Dorota Gurda,Agnieszka Chlebicka,Lionel Moulin +6 more
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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Minimal standards for the description of new genera and species of rhizobia and agrobacteria
Philippe de Lajudie,Mitchell Andrews,Julie Ardley,Bertrand D. Eardly,Estelle Jumas-Bilak,Nemanja Kuzmanović,Florent Lassalle,Kristina Lindström,Ridha Mhamdi,Esperanza Martínez-Romero,Lionel Moulin,Seyed Abdollah Mousavi,Xavier Nesme,Alvaro Peix,Joanna Puławska,Emma Theodora Steenkamp,Tomasz Stępkowski,Chang Fu Tian,Pablo Vinuesa,Gehong Wei,Anne Willems,Jerri Édson Zilli,Peter Young +22 more
TL;DR: These guidelines supplement the current rules of general bacterial taxonomy, which require a name that conforms to the International Code of Nomenclature of Prokaryotes, and deposition of the type strain in two international culture collections in separate countries.
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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.