Biodiversity of cultivable Burkholderia species in Argentinean soils under no-till agricultural practices

DEGROSSI J; ABDIAN P; ZORREGUIETA A; DRAGHI WO; BRELLES MARIÑO G; WALL LG; BIALER M; SOLER BISTUE A

PLOS ONE

PUBLIC LIBRARY SCIENCE

Lugar: San Francisco; Año: 2018 vol. 13 p. 1 - 18

1932-6203

No-tillage crop production has revolutionized the agriculture worldwide. In our country morethan 30 Mha are currently cultivated under no-till schemes, stressing the importance of thismanagement system for crop production. It is widely recognized that soil microbiota isaltered under different soil managements. In this regard the structure of Burkholderia populationsis affected by soils management practices such as tillage, fertilization, or crop rotation.The stability of these structures, however, has not been evaluated under sustainableschemes where the impact of land practices could be less deleterious to physicochemicalsoils characteristics. In order to assess the structure of Burkholderia spp. populations in notillschemes, culturable Burkholderia spp. strains were quantified and their biodiversity evaluated.Results showed that Burkholderia spp. biodiversity, but not their abundance, clearlydisplayed a dependence on agricultural managements. We also showed that biodiversitywas mainly influenced by two soil factors: Total Organic Carbon and Total Nitrogen. Resultsshowed that no-till schemes are not per se sufficient to maintain a richer Burkholderia spp.soil microbiota, and additional traits should be considered when sustainability of productivesoils is a goal to fulfil productive agricultural schemes