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Authors Hmaeid, N; Wali, M; Metoui-Ben Mahmoud, O; Pueyo, JJ; Ghnaya, T; Abdelly, C
Author Full Name Hmaeid, Nizar; Wali, Mariem; Metoui-Ben Mahmoud, Ouissal; Pueyo, Jose J.; Ghnaya, Tahar; Abdelly, Chedly
Title Efficient rhizobacteria promote growth and alleviate NaCl-induced stress in the plant species Sulla carnosa
Source APPLIED SOIL ECOLOGY
Language English
Document Type Article
Author Keywords NaCl; Salt tolerance; PGPR; Plant growth promotion; Sulla carnosa
Keywords Plus SALT TOLERANCE; OXIDATIVE STRESS; ACID PRODUCTION; SOIL-SALINITY; ZEA-MAYS; BACTERIA; L.; ASSAY; INOCULATION; MAIZE
Abstract The present work aims to characterize native bacteria from the saline rhizosphere of Sulla carnosa and to identify promising rhizobacteria isolates able to ameliorate the salt tolerance of this species. Bacteria were screened in vitro for salt tolerance capacity and plant growth promoting characteristics (PGP). Selected NaCl-tolerant bacteria showing a high PGP potential were further characterized for plant promotion effects on the growth of S. carnosa under salt stress (200 mM NaCl). Three putative salt-tolerant strains that showed multiple PGP-traits identified as Acinetobacter sp. (Br3), Pseudomonas putida (Br18) and Curtobacterium sp. (Br20) were selected for inoculation study. In a greenhouse experiment, NaCl significantly disturbed physiological parameters in noninoculated S. carnosa. In these plants, NaCl reduced growth, increased foliar proline and malondialdehyde concomitant to Na-+/- shoot concentrations. However, bacterial inoculation with selected PGP isolates ameliorated significantly plant growth and alleviated salt-induced physiological disturbances. Hence, as compared to non-inoculated plants, inoculation provided a significant increase in dry biomass and increased photosynthetic efficiency and chlorophyll leaf content under saline condition. Additional analysis showed that microbial inoculation also enhanced total soluble sugars content and antioxidant enzymes activities thereby preventing reactive oxygen species (ROS)-induced oxidative damage in plants. These results suggest that the inoculation of NaCl-stressed plants with selected salt-tolerant PGPR inocula exert beneficial effects on plant growth by alleviating salt-induced toxicity stress on plant growth and development.
Author Address [Hmaeid, Nizar; Wali, Mariem; Metoui-Ben Mahmoud, Ouissal; Ghnaya, Tahar; Abdelly, Chedly] Biotechnol Ctr Borj Cedria, Lab Extremophile Plants, POB 901, Hammam Lif 2050, Tunisia; [Hmaeid, Nizar; Pueyo, Jose J.] CSIC, ICA, Inst Agr Sci, C Serrano 115 Bis, E-28006 Madrid, Spain
Reprint Address Wali, M (corresponding author), Biotechnol Ctr Borj Cedria, Lab Extremophile Plants, POB 901, Hammam Lif 2050, Tunisia.
E-mail Address wali.meriem@gmail.com
ResearcherID Number Pueyo, Jose J./D-8993-2016
ORCID Number Pueyo, Jose J./0000-0003-0337-4078
Funding Agency and Grant Number Tunisian Ministry of Higher Education and Scientific Research [LR15CBBC02]; Spanish Institute of Agricultural Sciences (ICA-CSIC)
Funding Text This work was supported by the Tunisian Ministry of Higher Education and Scientific Research LR15CBBC02 and by the Spanish Institute of Agricultural Sciences (ICA-CSIC). All authors thank scientific and technical staff of the two collaborating research groups for valuable advice and technical help.
Times Cited 10
Total Times Cited Count (WoS, BCI, and CSCD) 12
Publisher ELSEVIER SCIENCE BV
Publisher City AMSTERDAM
Publisher Address PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN 0929-1393
29-Character Source Abbreviation APPL SOIL ECOL
ISO Source Abbreviation Appl. Soil Ecol.
Publication Date JAN
Year Published 2019
Volume 133
Beginning Page 104
Ending Page 113
Digital Object Identifier (DOI) 10.1016/j.apsoil.2018.09.011
Page Count 10
Web of Science Category Soil Science
Subject Category Agriculture
Document Delivery Number GZ7WU
Unique Article Identifier WOS:000449698100012
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