Metal mobilisation by Microbacteriaceae
Abstract
Heavy metal accumulating plants can be employed to remediate contaminated soils. This cleanup approach termed phytoextraction is sustainable but relatively slow, because metal extraction is limited by the rate of metal uptake into shoots and by shoot biomass production. Bacteria associated with heavy metal accumulating plants have the potential to improve phytoextraction. They may improve plant performance, particularly under plant stress conditions, however, in addition they may greatly enhance heavy metal mobilization in soil making higher amounts of heavy metals available to the plant. In previous studies we identified bacteria belonging to the Microbacteriaceae having heavy metal mobilizing capacities, however, the mechanisms are unknown yet. Our hypothesis is that these bacteria are able to produce secondary metabolites, which are produced in the mobilization process. We will follow a genome sequence-based approach followed by chemical characterization to identify the genetic basis, chemical characteristics, distribution and expression patterns of the observed metallophores. In addition, their interaction with the plant host and relevance to phytoextraction will be analyzed in plant experiments with Salix smithiana.
keywords phytoextraction root exudation soil bacteria secundary metabolites rhizosphere
Publikationen
Project staff
Markus Puschenreiter
Priv.-Doz. Dr. Markus Puschenreiter
markus.puschenreiter@boku.ac.at
Tel: +43 1 47654-91143, 91163
BOKU Project Leader
01.07.2012 - 30.06.2015
Stephan Hann
Univ.Prof. Dr. Stephan Hann
stephan.hann@boku.ac.at
Tel: +43 1 47654-77001, 77191
Project Staff
01.07.2012 - 30.06.2015
BOKU partners
External partners
AIT, Austrian Institute of Technology
Dr. Angela Sessitsch
partner