title: Moderate salinity reduced phenanthrene-induced stress in the halophyte plant model Thellungiella salsuginea compared to its glycophyte relative Arabidopsis thaliana: Cross talk and metabolite profiling.
abstract: It was shown that halophytes experience higher cross-tolerance to stresses than glycophytes, which was often associated with their more powerful antioxidant systems. Moreover, salinity was reported to enhance halophyte tolerance to several stresses. The aim of the present work was to investigate whether a moderate salinity enhances phenanthrene stress tolerance in the halophyte Thellungiella salsuginea. The model plant Arabidopsis thaliana, considered as its glycophyte relative, was used as reference. Our study was based on morpho-physiological, antioxidant, and metabolomic parameters. Results showed that T. salsuginea was more tolerant to phenanthrene stress as compared to A. thaliana. An improvement of phenanthrene-induced responses was recorded in the two plants in the presence of 25 mM NaCl, but the effect was significantly more obvious in the halophyte. This observation was particularly related to the higher antioxidant activities and the induction of more adapted metabolism in the halophyte. Gas Chromatography coupled with Mass Spectrometry (GC-MS) was used to quantify alcohols, ammonium, sugars, and organic acids. It showed the accumulation of several metabolites, many of them are known to be involved in signaling and abiotic stress tolerance. Moderate salinity and phenanthrene cross-tolerance involved in these two stresses was discussed.
authors.affiliation: University of Rennes 1, CNRS/OSUR-UMR 6553, Ecosystemes-Biodiversity-Evolution, Campus de Beaulieu, Bâtiment 14A, 35042 Rennes Cedex, France; Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, Tunisia.
authors.forename: Moez
authors.initials: M
authors.lastname: Shiri
authors.affiliation: Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, Tunisia; University of Hafr Al Batin, College of Science and Arts in Nairiyah, 31981, Nairiyah, Saudi Arabia.
authors.forename: Mokded
authors.initials: M
authors.lastname: Rabhi
authors.affiliation: Laboratory of Extremophile Plants, Centre of Biotechnology of Borj Cedria, P.O. Box 901, 2050 Hammam-Lif, Tunisia.
authors.forename: Chedly
authors.initials: C
authors.lastname: Abdelly
authors.affiliation: INRA Agrocampus Ouest, University de Rennes 1, UMR 1349 Institut of Genetic, Environnement and Protection of Plants, F-35653 Le Rheu Cedex, France.
authors.forename: Alain
authors.initials: A
authors.lastname: Bouchereau
authors.affiliation: University of Rennes 1, CNRS/OSUR-UMR 6553, Ecosystemes-Biodiversity-Evolution, Campus de Beaulieu, Bâtiment 14A, 35042 Rennes Cedex, France. Electronic address: abdelhak.elamrani@univ-rennes1.fr.
authors.forename: Abdelhak
authors.initials: A
authors.lastname: El Amrani
mesh_terms: D017360:Arabidopsis / Q000187:drug effects / Q000378:metabolism*; D001937:Brassica / Q000187:drug effects / Q000378:metabolism*; D010616:Phenanthrenes / Q000633:toxicity*; D054712:Salinity; D055051:Salt-Tolerant Plants / Q000378:metabolism; D012965:Sodium Chloride / Q000494:pharmacology*; D013312:Stress, Physiological / Q000187:drug effects*
chemical_list: D010616:Phenanthrenes; C031181:phenanthrene; D012965:Sodium Chloride
keywords: Antioxidant enzymes; Cross-tolerance; Metabolomic analysis; Stress signaling