Publications des scientifiques de l'IRD

Blaud A., Chevallier Tiphaine, Virto I., Pablo A. L., Chenu C., Brauman Alain. (2014). Bacterial community structure in soil microaggregates and on particulate organic matter fractions located outside or inside soil macroaggregates. Pedobiologia, 57 (3), p. 191-194. ISSN 0031-4056.

Titre du document
Bacterial community structure in soil microaggregates and on particulate organic matter fractions located outside or inside soil macroaggregates
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000337855500009
Auteurs
Blaud A., Chevallier Tiphaine, Virto I., Pablo A. L., Chenu C., Brauman Alain
Source
Pedobiologia, 2014, 57 (3), p. 191-194 ISSN 0031-4056
Soil aggregates and particulate organic matter (POM) are thought to represent distinct soil microhabitats for microbial communities. This study investigated whether organo-mineral (0-20,20-50 and 50-200 pm) and POM (two sizes: >200 and <200 mu m) soil fractions represent distinct microbial habitats. Microbial habitats were characterised by the amount and quality of organic matter, the genetic structure of the bacterial community, and their location outside or inside macroaggregates (>200 mu m). The denaturing gradient gel electrophoresis (DGGE) profiles revealed that bacterial communities structure of organo-mineral soil fractions were significantly different in comparison to the unfractionated soil. Conversely, there were little differences in C concentrations, C:N ratios and no differences in DGGE profiles between organo-mineral fractions. Bacterial communities between soil fractions located inside or outside macroaggregates were not significantly different. However, the bacterial communities on POM fractions were significantly different in comparison to organo-mineral soil fractions and unfractionated soil, and also between the 2 sizes of POM. Thus in the studied soil, only POM fractions represented distinct microhabitats for bacterial community, which likely vary with the state of decomposition of the POM.
Plan de classement
Pédologie [068] ; Biologie du sol [074]
Localisation
Fonds IRD [F B010062304]
Identifiant IRD
fdi:010062304
Contact