www.uhasselt.be
DSpace

Document Server@UHasselt >
Research >
Research publications >

Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/9084

Title: ENDOPHYTIC BACTERIA FROM SEEDS OF NICOTIANA TABACUM CAN REDUCE CADMIUM PHYTOTOXICITY
Authors: Mastretta, Chiara
Taghavi, Safiyh
Van Der Lelie, Daniël
Mengoni, Alessio
Galardi, Francesca
Gonnelli, Christina
Barac, Tanja
Boulet, Jana
Weyens, Nele
Vangronsveld, Jaco
Issue Date: 2009
Publisher: TAYLOR & FRANCIS INC
Citation: INTERNATIONAL JOURNAL OF PHYTOREMEDIATION, 11(3). p. 251-267
Abstract: Although endophytic bacteria seem to have a close association with their host plant, little is known about the influence of seed endophytic bacteria on initial plant development and on their interactions with plants under conditions of metal toxicity. In order to further elucidate this close relationship, we isolated endophytic bacteria from surface sterilized Nicotiana tabacum seeds that were collected from plants cultivated on a cadmium-(Cd) and zinc-enriched soil. Many of the isolated strains showed Cd tolerance. Sterilely grown tobacco plants were inoculated with either the endogenous microbial consortium, composed of cultivable and noncultivable strains; single strains; or defined consortia of the most representative cultivable strains. Subsequently, the effects of inoculation of endophytic bacteria on plant development and on metal and nutrient uptake were explored under conditions with and without exposure to Cd. In general, seed endophytes were found to have a positive effect on plant growth, as was illustrated by an increase in biomass production under conditions without Cd. In several cases, inoculation with endophytes resulted in improved biomass production under conditions of Cd stress, as well as in a higher plant Cd concentration and total plant Cd content compared to noninoculated plants. These results demonstrate the beneficial effects of seed endophytes on metal toxicity and accumulation, and suggest practical applications using inoculated seeds as a vector for plant beneficial bacteria.
Notes: [Mastretta, Chiara; Barac, Tanja; Boulet, Jana; Weyens, Nele; Vangronsveld, Jaco] Hasselt Univ, B-3590 Diepenbeek, Belgium. [Taghavi, Safiyh; van der Lelie, Daniel] Brookhaven Natl Lab, Dept Biol, Upton, NY 11973 USA. [Mengoni, Alessio] Univ Florence, Dipartimento Biol Anim & Genet, I-50125 Florence, Italy. [Galardi, Francesca; Gonnelli, Christina] Univ Florence, Dipartimento Biol Vegetale, I-50125 Florence, Italy.
URI: http://hdl.handle.net/1942/9084
DOI: 10.1080/15226510802432678
ISI #: 000261336400003
ISSN: 1522-6514
Category: A1
Type: Journal Contribution
Validation: ecoom, 2009
Appears in Collections: Research publications

Files in This Item:

Description SizeFormat
Published version668.38 kBAdobe PDF
Peer-reviewed author version650.54 kBAdobe PDF

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.