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dc.contributor.authorBankaji, Insaf
dc.contributor.authorSLEIMI, Noomene
dc.contributor.authorLópez Climent, María Fernanda
dc.contributor.authorPerez-Clemente, Rosa Maria
dc.contributor.authorGomez-Cadenas, Aurelio
dc.date.accessioned2015-09-22T11:51:05Z
dc.date.available2015-09-22T11:51:05Z
dc.date.issued2014-09
dc.identifier.citationBANKAJI, I., et al. Effects of Combined Abiotic Stresses on Growth, Trace Element Accumulation, and Phytohormone Regulation in Two Halophytic Species. Journal of Plant Growth Regulation, 2014, 33.3: 632-643.ca_CA
dc.identifier.urihttp://hdl.handle.net/10234/133520
dc.description.abstractfor 1 month with an irrigation solution supplemented with 200 mM NaCl and 400 μM Cd2+ or 400 μM Cu2+ was evaluated. The effect of the combined stress conditions on hormone signaling was also assessed. Biomass production and chlorophyll content decreased under Cd2+ stress in both species, whereas Cu2+ had a lower impact on plant performance. The different plant sensibilities to the two trace elements assayed indicate that each metal has a different effect on plants. Furthermore, the deleterious effect of metal toxicity was alleviated when NaCl was added to the irrigation solution, demonstrating that NaCl improves plant performance and tolerance of halophytic species to cope with trace element intoxication. Results show that both species accumulated important quantities of Cd2+ and Cu2+ in roots (Cd2+: 2,690–3,130 μg g−1 DW and Cu2+: 2,070–2,770 μg g−1 DW); this finding allows us to classify these species among the hyperaccumulator plants. Cd2+ and Cu2+ differently affected endogenous phytohormone contents in both species. Data suggest an essential involvement of roots on the regulation of tolerance to trace elements. Therefore, indole-3-acetic acid levels increased in roots of both species irrigated with high levels of Cd2+, which suggests that the auxin may stimulate root promotion and growth under these stress conditions. Other compounds, classically considered as “stress hormones” showed very different patterns of accumulation. Whereas, salicylic acid (SA) levels in roots and leaves increased in response to Cd2+, root contents of jasmonic acid (JA), and abscisic acid (ABA) decreased. In leaves, the rambling pattern of accumulation observed for JA and ABA suggested the lack of a specific role in regulation against trace element toxicity. Together, data suggest that SA could act as a specific signal that detects trace element toxicity, whereas JA and ABA promote general responses against abiotic stress.ca_CA
dc.format.extent11 p.ca_CA
dc.format.mimetypeapplication/pdfca_CA
dc.language.isoengca_CA
dc.publisherSpringer Verlagca_CA
dc.relation.isPartOfJournal of Plant Growth Regulation September 2014, Volume 33, Issue 3ca_CA
dc.rights© Springer International Publishing AGca_CA
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/*
dc.subjecthalophytesca_CA
dc.subjectstress combinationca_CA
dc.subjectd2+ and Cu2+ toxicityca_CA
dc.subjectphytohormonesca_CA
dc.subjecttoleranceca_CA
dc.titleEffects of combined Abiotic Stresses on Growth, Trace Element Accumulation, and Phytohormone Regulation in Two Halophytic Speciesca_CA
dc.typeinfo:eu-repo/semantics/articleca_CA
dc.identifier.doihttp://dx.doi.org/10.1007/s00344-014-9413-5
dc.rights.accessRightsinfo:eu-repo/semantics/restrictedAccessca_CA
dc.relation.publisherVersionhttp://link.springer.com/article/10.1007/s00344-014-9413-5ca_CA


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