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Publication Type J
Authors Rabhi, M., A. Castagna, D. Remorini, C. Scattino, A. Smaoui, A. Ranieri and C. Abdelly
Title Photosynthetic responses to salinity in two obligate halophytes: Sesuvium portulacastrum and Tecticornia indica
Source South African Journal of Botany
Author Keywords Carotenoids Chlorophyll Photosynthesis Salt stress carbon-isotope discrimination a/b-binding-proteins gas-exchange salt stress c-4 photosynthesis ion accumulation growth light nacl l.
Abstract Seedlings of the obligate halophytes Sesuvium portulacastrum L. and Tecticornia indica (Willd.) subsp. indica were grown with 0, 200, or 400 mM NaCl for 13 weeks to investigate whether salt tolerance was related to maintenance of adequate photosynthetic activity and pigment equipment. Both species showed growth optimum at 200 mM NaCl and better tissue hydration under salinity but different photosynthetic response to salinity. CO2 assimilation rate and stomatal conductance of S. portulacastrum were highest at 200 mM NaCl, while in T. indica they decreased with salinity. Pigment content increased under salinity in both species. The de-epoxidation state in S. portulacastrum suggests the need for energy dissipation at 400 mM NaCl, while its salt-induced decline in T. indica, despite the reduced photochemistry, suggests the involvement of adaptive mechanisms other than the xanthophyll cycle. (C) 2011 SAAB. Published by Elsevier B.V. All rights reserved.
Author Address [Castagna, A.; Scattino, C.; Ranieri, A.] Univ Pisa, Dept Crop Biol, I-56124 Pisa, Italy. [Rabhi, M.; Smaoui, A.; Abdelly, C.] Borj Cedria Biotechnol Ctr, Lab Extremophile Plants LPE, Hammam Lif 2050, Tunisia. [Remorini, D.] Univ Pisa, Dipartimento Coltivaz & Difesa Specie Legnose G S, I-56124 Pisa, Italy. Ranieri, A (reprint author), Univ Pisa, Dept Crop Biol, Via Borghetto 80, I-56124 Pisa, Italy aranieri@agr.unipi.it
ISSN 0254-6299
ISBN 0254-6299
29-Character Source Abbreviation S. Afr. J. Bot.
Publication Date Mar
Year Published 2012
Volume 79
Beginning Page 39-47
Digital Object Identifier (DOI) 10.1016/j.sajb.2011.11.007
Unique Article Identifier WOS:000302978900006
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