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Please use this identifier to cite or link to this item: http://hdl.handle.net/1942/23806

Title: Native rhizobia from Zn mining soil promote the growth of Leucaena leucocephala on contaminated soil
Authors: Rangel, Wesley M.
Thijs, Sofie
Janssen, Jolien
Oliveira Longatti, Silvia M.
Bonaldi, Daiane S.
Ribeiro, Paula R. A.
Jambon, Inge
Eevers, Nele
Weyens, Nele
Vangronsveld, Jaco
Moreira, Fatima M. S.
Issue Date: 2017
Abstract: Plants on contaminated mining soils often show a reduced growth due to nutrient depletion as well as trace elements (TEs) toxicity. Since those conditions threat plant's survival, plant growth-promoting rhizobacteria (PGPRs), such as rhizobia, might be of crucial importance for plant colonization on TE-contaminated soils. Native rhizobia from mining soils are promising candidates for bioaugmented phytoremediation of those soils as they are adapted to the specific conditions. In this work, rhizobia from Zn-and Cd-contaminated mining soils were in vitro screened for their PGP features [organic acids, indole-3-acetic acid (IAA), and siderophore (SID) production; 1-aminocyclopropane-1-carboxylate (ACC) deaminase activity; and Ca-3(PO4)(2) solubilization] and Zn and Cd tolerance. In addition, some type and reference rhizobia strains were included in the study as well. The in vitro screening indicated that rhizobia and other native genera have great potential for phytoremediation purposes, by exerting, besides biological N-2 fixation, other plant growth-promoting traits. Leucaena leucocephala-Mesorhizobium sp. (UFLA 01-765) showed multielement tolerance and an efficient symbiosis on contaminated soil, decreasing the activities of antioxidative enzymes in shoots. This symbiosis is a promising combination for phytostabilization.
Notes: [Rangel, Wesley M.] Fed Univ Lavras UFLA, Dept Biol, Lavras, MG, Brazil. [Rangel, Wesley M.; Oliveira Longatti, Silvia M.; Bonaldi, Daiane S.; Ribeiro, Paula R. A.; Moreira, Fatima M. S.] Fed Univ Lavras UFLA, Soil Sci Dept, BR-37200000 Lavras, MG, Brazil. [Rangel, Wesley M.; Thijs, Sofie; Janssen, Jolien; Jambon, Inge; Eevers, Nele; Weyens, Nele; Vangronsveld, Jaco] Hasselt Univ, Ctr Environm Sci, Diepenbeek, Belgium.
URI: http://hdl.handle.net/1942/23806
DOI: 10.1080/15226514.2016.1207600
ISI #: 000392673100006
ISSN: 1522-6514
Category: A1
Type: Journal Contribution
Appears in Collections: Research publications

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