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Publication Type J
Authors Boscaiu, M., G. Ballesteros, M. A. Naranjo, O. Vicente and H. Boira
Title Responses to salt stress in Juncus acutus and J. maritimus during seed germination and vegetative plant growth
Source Plant Biosystems
Author Keywords Abiotic stress cation accumulation ion exchange HPLC Juncus salt tolerance seed germination new-zealand salinity temperature halophytes tolerance toxicity patterns recovery kraussii calcium
Abstract Responses to increasing salinity, during seed germination and vegetative plant growth, were studied in two related species of Juncus, J. maritimus and J. acutus. In both species, germination was optimal in the absence of salt, reduced by about 50% in the presence of 200 mM NaCl, and completely inhibited by NaCl concentrations above 300 mM. Previous exposure of the seeds to salt, up to 500 mM NaCl, did not affect the germination capacity in J. acutus, and clearly enhanced it in J. maritimus. A concentration-dependent inhibition of plant growth was observed in the presence of NaCl for both species, together with the parallel accumulation of sodium ions in the leaves, as determined by cation exchange HPLC. Regarding the levels of divalent cations, in J. acutus Ca2+ and Mg2+ increased up to about two-fold in plants treated with 500 mM NaCl, as compared to control plants, whereas in J. maritimus they were three-to four-fold higher than in J. acutus in the absence of salt, and did not change significantly with increasing NaCl concentrations. These results suggest that Ca2+ and Mg2+ participate in defence mechanisms against salt stress, which would be constitutive in J. maritimus and salt-inducible in J. acutus.
Author Address [Naranjo, M. A.; Vicente, O.] Univ Politecn Valencia, Inst Biol Mol & Celular Plantas UPV CSIC, Valencia 46022, Spain. [Boscaiu, M.; Ballesteros, G.; Boira, H.] Univ Politecn Valencia, Inst Agroforestal Mediterraneo UPV, Valencia 46022, Spain. Vicente, O (reprint author), Univ Politecn Valencia, Inst Biol Mol & Celular Plantas, CPI Edificio 8E,Camino Vera S-N, Valencia 46022, Spain ovicente@ibmcp.upv.es
ISSN 1126-3504
ISBN 1126-3504
29-Character Source Abbreviation Plant Biosyst.
Year Published 2011
Volume 145
Issue 4
Beginning Page 770-777
Digital Object Identifier (DOI) 10.1080/11263504.2011.628446
Unique Article Identifier WOS:000299428800004
Plants associated with this reference

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