Auxin secretion by Bacillus amyloliquefaciens FZB42 both stimulates root exudation and limits phosphorus uptake in Triticum aestivium.

ABSTRACT:

Background

The use of auxin-producing rhizosphere bacteria as agricultural products promises increased root production and therefore greater phosphate (Pi) uptake. Whilst such bacteria promote root production in vitro, the nature of the bacteria-plant interaction in live soil, particularly concerning any effects on nutrient uptake, are not known. This study uses Bacillus amyloliquefaciens FZB42, an auxin-producing rhizobacterium, as a dressing on Triticum aestivium seeds. It then examines the effects on root production, Pi uptake, Pi-related gene expression and organic carbon (C) exudation.

Results

Seed treatment with B. amyloliquefaciens FZB42 increased root production at low environmental Pi concentrations, but significantly repressed root Pi uptake. This coincided with an

SUBMITTER: Talboys PJ 

PROVIDER: S-EPMC4015440 | biostudies-literature | 2014 Feb

REPOSITORIES: biostudies-literature