Role of rhizosphere microbes on hypertolerance and hyperaccumulation of metals on serpentine soils.
Abstract
The aim of this project is to clarify the contribution of rhizosphere microorganisms on metal tolerance and accumulation of plants growing on serpentine soils. Serpentine soils are an extreme habitat for plants, because of high metal concentrations (nickel, chromium, in some cases cobalt) and of low nutrient levels. Plants growing on this site are extremly tolerant to the soil metals (hypertolerant), some of them have developed the strategy to accumulate large amounts of metals in plant tissue (hyperaccumulators). Little is known on the rhizosphere processes influencing metal mobility and plant availability in metalliferous soils. Especially the role of root exudates is largely unknown and previous data are somewhat contradictory. Due to the enhanced microbial activity in rhizosphere it is expected, that those microbes also play an important role in metal availability to plants and are therefore crucial for plant survival in this environment. Little research work has been conducted on the plant-microbe interactions in metal contaminated soils. In this project the following tasks should be invesigated on Thlaspi goesingense (hypertolerant) and Silene vulgaris (hypertolerant) growing on serpentine soil: Biogeochemistry of metals under influence of two different plant strategies (tolerance and accumulation) Root exudates and their influence on metal mobilisation and microbial turnover Isolation and characterisation of rhizosphere bacteria and investigation of their contribution to hypertolerance and hyperaccumulation Rolle of mycorrhizae on heavy metal tolerance This experiments will clarify the contribution of rhizosphere microbes on the metal tolerance and accumulation of plants on serpentine soils. This information may also help to improve phytoremediation technologies.
hyperaccumulation Thlaspi serpentine soil rhizosphere soil microbes
Publikationen
Steine zum Leben erwecken.
Autoren: Strauss, J., Wenzel, W.W. Jahr: 2001
Newspaper / Magazine article
Plant-induced and microbial processes in the rhizosphere of the nickel hyperaccumulator Thlaspi goesingense
Autoren: Puschenreiter M., Idris R., Plestenjak S., Sessitsch A., Wenzel W.W. Jahr: 2003
Conference & Workshop proceedings, paper, abstract
Bacterial communities associated with flowering plants of the Ni hyperaccumulator Thlaspi goesingense.
Autoren: Idris, R; Trifonova, R; Puschenreiter, M; Wenzel, WW; Sessitsch, A Jahr: 2004
Journal articles
Effect of rhizosphere microbes and endophytes on Ni hyperaccumulation by Thlaspi goesingense
Autoren: Puschenreiter, M., Sessitsch, A., Weilharter, A., Idris, R., Wenzel, W.W. Jahr: 2005
Conference & Workshop proceedings, paper, abstract
Model development for simulating the bioavailability of Ni to the hyperaccumulator Thlaspi goesingense
Autoren: Schnepf, A., Himmelbauer, M.L., Puschenreiter, M., Schrefl, T., Lombi, E., Fitz, W.J., Loiskandl, W., Wenzel, W.W. Jahr: 2005
Chapter in collected volumes
Rhizosphere characteristics, heavy metal accumulation and growth performance of two willow (Salix x rubens) clones
Autoren: Vyslouzilova, M; Puschenreiter, M; Wieshammer, G; Wenzel, WW Jahr: 2006
Journal articles
Project staff
Walter Wenzel
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Walter Wenzel
walter.wenzel@boku.ac.at
Tel: +43 1 47654-91143, 91161
Project Leader
01.02.2002 - 31.01.2005
Markus Puschenreiter
Priv.-Doz. Dr. Markus Puschenreiter
markus.puschenreiter@boku.ac.at
Tel: +43 1 47654-91143, 91163
Project Staff
01.02.2002 - 31.01.2005
Joseph Strauss
Univ.Prof. Mag.rer.nat. Dr.rer.nat. Joseph Strauss
joseph.strauss@boku.ac.at
Tel: +43 1 47654-94420
Project Staff
01.02.2002 - 31.01.2005
BOKU partners
External partners
Austrian Research Centers
none
partner