Cell-free culture medium of <Emphasis Type="Italic">Burkholderia cepacia</Emphasis> improves seed germination and seedling growth in maize (<Emphasis Type="Italic">Zea mays</Emphasis>) and rice (<Emphasis Type="Italic">Oryza sativa</Emphasis>) |
| |
Authors: | Annia Hernández-Rodríguez Mayra Heydrich-Pérez Billo Diallo Mondher El Jaziri Olivier M Vandeputte |
| |
Institution: | 1.Departamento de Microbiología y Virología, Facultad de Biología,Universidad de la Habana,Ciudad Habana,Cuba;2.Laboratoire de Biotechnologie Végétale,Université Libre de Bruxelles (ULB),Gosselies,Belgium |
| |
Abstract: | The saprophytic bacterium Burkholderia
cepacia 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 (Zea
mays) and rice (Oryza
sativa). 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|