par Hernandez Rodriguez, Annia 
;Heydrich Perez, Mayra ;Diallo, Bilo ;El Jaziri, Mondher ;Vandeputte, Olivier M.
Référence Plant growth regulation, 60, page (191-197)
Publication Publié, 2010
;Heydrich Perez, Mayra ;Diallo, Bilo ;El Jaziri, Mondher ;Vandeputte, Olivier M. Référence Plant growth regulation, 60, page (191-197)
Publication Publié, 2010
Article révisé par les pairs
| Résumé : | The saprophytic bacterium Burkholderiacepacia has been shown to play an active role as plant growth promoting bacteria (PGPB). In this study, the ability of cell-free culture medium (CFCM) of B. cepacia to improve early developmental stages of plants has been assessed on two agronomically important crops, maize (Zeamays) and rice (Oryzasativa). Treating maize and rice seeds for 45 min before germination significantly improved seed germination and consequent seedling growth. The effect of CFCM was confirmed by the increased biomass of the shoot and, mainly, the root systems of treated seedlings. Chromatographic characterization of the CFCM revealed that the spent culture medium of B. cepacia is a complex mix of different classes of metabolites including, among others, salicylic acid, indole-3-acetic acid (IAA) and several unidentified phenolic compounds. Fractionation of the CFCM components revealed that the impressive development of the root system of CFCM-treated seedlings is due to the synergistic action of several groups of components rather than IAA alone. The data presented here suggest that a CFCM of B. cepacia can be used to improve crop germination. © Springer Science+Business Media B.V. 2009. |
