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R. C. , studies the genetic diversity, evolution and genomics of rhizobia and also of arbuscular mycorrhizal fungi; the sequence data were obtained by C.B. (postdoc, now a lecturer at the Université Henri Poincaré

K. J. , is a specialist in microscopy with a research interest in the rhizobium symbiosis; he initiated the project and led the field work, while G.N.E. (postdoc, a molecular microbiologist now developing a novel detection method for microbes) conducted plant tests and other studies

J. I. , S. researches the phylogenetics and distribution of mimosoid legumes; he identified the Mimosa species. The other Brazilian teams