title: Responses of soil microbial catabolic diversity to arbuscular mycorrhizal inoculation and soil disinfection.
abstract: Although it is usually admitted that arbuscular mycorrhizal (AM) fungi are key components in soil bio-functioning, little is known on the response of microbial functional diversity to AM inoculation. The aims of the present study were to determine the influence of Glomus intraradices inoculum densities on plant growth and soil microflora functional diversity in autoclaved soil or non-disinfected soil. Microbial diversity of soil treatments was assessed by measuring the patterns of in situ catabolic potential of microbial communities. The soil disinfection increased sorghum growth, but lowered catabolic evenness (4.8) compared to that recorded in the non-disinfected soil (6.5). G. intraradices inoculation induced a higher plant growth in the autoclaved soil than in the non-disinfected soil. This AM effect was positively related to inoculum density. Catabolic evenness and richness were positively correlated with the number of inoculated AM propagules in the autoclaved soil, but negatively correlated in the non-disinfected soil. In addition, after soil disinfection and AM inoculation, these microbial functionality indicators had higher values than in the autoclaved or in the non-disinfected soil without AM inoculation. These results are discussed in relation to the ecological influence of AM inoculation, with selected fungal strains and their associated microflora on native soil microbial activity.
authors: INERA, Laboratoire SEP (Sol-Plante-Eau), 01 BP 476, Ouagadougou, Burkina Faso.|IRD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France.
authors: A P
authors: AP
authors: Dabire
authors: INERA, Laboratoire SEP (Sol-Plante-Eau), 01 BP 476, Ouagadougou, Burkina Faso.
authors: V
authors: V
authors: Hien
authors: IRD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France.
authors: M
authors: M
authors: Kisa
authors: INERA, Laboratoire SEP (Sol-Plante-Eau), 01 BP 476, Ouagadougou, Burkina Faso.
authors: A
authors: A
authors: Bilgo
authors: IRD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France.
authors: K S
authors: KS
authors: Sangare
authors: INRA, UMR BGA, 17 rue Sully, 21065, Dijon, Cedex, France.
authors: C
authors: C
authors: Plenchette
authors: CIRAD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France.
authors: A
authors: A
authors: Galiana
authors: CIRAD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France.
authors: Y
authors: Y
authors: Prin
authors: IRD, UMR 113 CIRAD/INRA/IRD/AGRO-M/UM2, Laboratoire des Symbioses Tropicales et Méditerranéennes (LSTM), TA10/J, Campus International de Baillarguet, 34398, Montpellier Cedex 5, France. robin.duponnois@ird.sn.
authors: R
authors: R
authors: Duponnois
mesh_terms: D000596:Amino Acids / Q000378:metabolism; D050260:Carbohydrate Metabolism; D002264:Carboxylic Acids / Q000378:metabolism; D004203:Disinfection / Q000379:methods*; D017753:Ecosystem; D005658:Fungi / Q000145:classification / Q000254:growth & development* / Q000378:metabolism; D038821:Mycorrhizae / Q000502:physiology*; D018517:Plant Roots / Q000382:microbiology; D012987:Soil / Q000032:analysis; D012988:Soil Microbiology; D045868:Sorghum / Q000254:growth & development / Q000382:microbiology*; D013559:Symbiosis
chemical_list: D000596:Amino Acids; D002264:Carboxylic Acids; D012987:Soil