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Authors Mesa-Marin, J; Del-Saz, NF; Rodriguez-Llorente, ID; Redondo-Gomez, S; Pajuelo, E; Ribas-Carbo, M; Mateos-Naranjo, E
Author Full Name Mesa-Marin, Jennifer; Fernandez Del-Saz, Nestor; Rodriguez-Llorente, Ignacio D.; Redondo-Gomez, Susana; Pajuelo, Eloisa; Ribas-Carbo, Miquel; Mateos-Naranjo, Enrique
Title PGPR Reduce Root Respiration and Oxidative Stress Enhancing Spartina maritima Root Growth and Heavy Metal Rhizoaccumulation
Source FRONTIERS IN PLANT SCIENCE
Language English
Document Type Article
Author Keywords plant growth promoting rhizobacteria (PGPR); heavy metals; Spartina maritima; root respiration; oxygen-isotope fractionation; oxidative stress; carbon balance; bioremediation
Keywords Plus PLANT-GROWTH; PROMOTING RHIZOBACTERIA; ALTERNATIVE OXIDASE; SALINITY TOLERANCE; BIOAUGMENTATION; BIOREMEDIATION; PATHWAY; SOIL; PHYTOREMEDIATION; METABOLISM
Abstract The present study aims to unravel ecophysiological mechanisms underlying plant-microbe interactions under natural abiotic stress conditions, specifically heavy metal pollution. Effect of plant growth promoting rhizobacteria (PGPR) bioaugmentation on Spartina maritima in vivo root respiration and oxidative stress was investigated. This autochthonous plant is a heavy metal hyperaccumulator cordgrass growing in one of the most polluted estuaries in the world. The association with native PGPR is being studied with a view to their biotechnological potential in environmental decontamination. As a novelty, the oxygen-isotope fractionation technique was used to study the in vivo activities of cytochrome oxidase (COX) and alternative oxidase (AOX) pathways. Inoculated plants showed decreased antioxidant enzymatic activities and in vivo root respiration rates. The reduction in respiratory carbon consumption and the stress alleviation may explain the increments observed in S. maritima root biomass and metal rhizoaccumulation after inoculation. For the first time, plant carbon balance and PGPR are interrelated to explain the effect of rhizobacteria under abiotic stress.
Author Address [Mesa-Marin, Jennifer; Redondo-Gomez, Susana; Mateos-Naranjo, Enrique] Univ Seville, Fac Biol, Dept Biol Vegetal & Ecol, Seville, Spain; [Fernandez Del-Saz, Nestor; Ribas-Carbo, Miquel] Univ Illes Balears, Grp Recerca Biol Plantes Cond Mediterranies, Palma De Mallorca, Spain; [Fernandez Del-Saz, Nestor] Univ Concepcion, Fac Ciencias Nat & Oceanog, Dept Bot, Concepcion, Chile; [Rodriguez-Llorente, Ignacio D.; Pajuelo, Eloisa] Univ Seville, Fac Farm, Dept Microbiol & Parasitol, Seville, Spain
Reprint Address Mesa-Marin, J (corresponding author), Univ Seville, Fac Biol, Dept Biol Vegetal & Ecol, Seville, Spain.
E-mail Address jmesam@us.es
ResearcherID Number Ribas-Carbo, Miquel/Y-2474-2019; Ribas-Carbo, Miquel/N-1634-2013; Redondo-Gomez, Susana/E-6783-2010; Rodriguez-Llorente, Ignacio D./AAG-7858-2019; Del-Saz, Nestor Fernandez/C-4425-2018; Mateos-Naranjo, Enrique/F-1782-2016; Mesa-Marin, Jennifer/L-8205-2018
ORCID Number Ribas-Carbo, Miquel/0000-0002-7337-2089; Redondo-Gomez, Susana/0000-0002-5280-9325; Rodriguez-Llorente, Ignacio D./0000-0001-7621-8303; Del-Saz, Nestor Fernandez/0000-0002-9934-2427; Mateos-Naranjo, Enrique/0000-0001-6276-5664; Mesa-Marin, Jennifer/0000-0001-8450-7906
Funding Agency and Grant Number Ministerio de Economia y Competitividad, Spain [CGL2016-75550-R (AEI/FEDER, UE)]; Ministerio de Educacion, Cultura y Deporte, Spain (FPU Grant)German Research Foundation (DFG) [AP2012-1809]
Funding Text This work was supported by Ministerio de Economia y Competitividad, Spain [project CGL2016-75550-R (AEI/FEDER, UE)] and Ministerio de Educacion, Cultura y Deporte, Spain (FPU Grant No. AP2012-1809 to JM-M).
Times Cited 19
Total Times Cited Count (WoS, BCI, and CSCD) 19
Publisher FRONTIERS MEDIA SA
Publisher City LAUSANNE
Publisher Address AVENUE DU TRIBUNAL FEDERAL 34, LAUSANNE, CH-1015, SWITZERLAND
ISSN 1664-462X
29-Character Source Abbreviation FRONT PLANT SCI
ISO Source Abbreviation Front. Plant Sci.
Publication Date OCT 17
Year Published 2018
Volume 9
Article Number 1500
Digital Object Identifier (DOI) 10.3389/fpls.2018.01500
Page Count 10
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number GX1PU
Unique Article Identifier WOS:000447490800001
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