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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/24126

Title: Use of plant growth promoting bacterial strains to improve Cytisus striatus and Lupinus luteus development for potential application in phytoremediation
Authors: Balseiro-Romero, Maria
Gkorezis, Panagiotis
Kidd, Petra S.
Van Hamme, Jonathan
Weyens, Nele
Monterroso, Carmen
Vangronsveld, Jaco
Issue Date: 2017
Citation: SCIENCE OF THE TOTAL ENVIRONMENT, 581, p. 676-688
Abstract: Plant growth promoting (PGP) bacterial strains possess different mechanisms to improve plant development under common environmental stresses, and are therefore often used as inoculants in soil phytoremediation processes. The aims of the present work were to study the effects of a collection of plant growth promoting bacterial strains on plant development, antioxidant enzyme activities and nutritional status of Cytisus striatus and/or Lupinus luteus plants a) growing in perlite under non-stress conditions and b) growing in diesel-contaminated soil. For this, two greenhouse experiments were designed. Firstly, C striatus and L. luteus plants were grown from seeds in perlite, and periodically inoculated with 6 PGP strains, either individually or in pairs. Secondly, L luteus seedlings were grown in soil samples of the A and B horizons of a Cambisol contaminated with 1.25% (w/w) of diesel and inoculated with best PGP inoculant selected from the first experiment. The results indicated that the PGP strains tested in perlite significantly improved plant growth. Combination treatments provoked better growth of L. luteus than the respective individual strains, while individual inoculation treatments were more effective for C striatus. L luteus growth in diesel-contaminated soil was significantly improved in the presence of PGP strains, presenting a 2-fold or higher increase in plant biomass. Inoculants did not provoke significant changes in plant nutritional status, with the exception of a subset of siderophore-producing and P-solubilising bacterial strains that resulted in significantly modification of Fe or P concentrations in leaf tissues. Inoculants did not cause significant changes in enzyme activities in perlite experiments, however they significantly reduced oxidative stress in contaminated soils suggesting an improvement in plant tolerance to diesel. Some strains were applied to non-host plants, indicating a non-specific performance of their plant growth promotion. The use of PGP strains in phytoremediation may help plants to overcome contaminant and other soil stresses, increasing phytoremediation efficiency. (C) 2016 Elsevier B.V. All rights reserved.
Notes: [Balseiro-Romero, Maria; Monterroso, Carmen] Univ Santiago de Compostela, Dept Soil Sci & Agr Chem, Campus Vida, Santiago De Compostela 15782, Spain. [Gkorezis, Panagiotis; Weyens, Nele; Vangronsveld, Jaco] Univ Hasselt, Ctr Environm Sci, Agoralaan Bldg B, B-3590 Diepenbeek, Belgium. [Kidd, Petra S.] CSIC, IIAG, Santiago De Compostela 15780, Spain. [Van Hamme, Jonathan] Thompson Rivers Univ, Dept Biol Sci, Kamloops, BC, Canada.
URI: http://hdl.handle.net/1942/24126
DOI: 10.1016/jscitotenv.2016.12.180
ISI #: 000394635300064
ISSN: 0048-9697
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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