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Publication Type J
Authors Gil, R., C. Lull, M. Boscaiu, I. Bautista, A. Lidon and O. Vicente
Title Soluble Carbohydrates as Osmolytes in Several Halophytes from a Mediterranean Salt Marsh
Source Notulae Botanicae Horti Agrobotanici Cluj-Napoca
Author Keywords abiotic stress osmoprotectants osmotic adjustment polyols salt stress salt tolerance soluble carbohydrates salinity tolerance plantago-crassifolia stress metabolism responses proline accumulation growth l. osmoregulation
Abstract Compartmentalization of toxic ions in the vacuole and accumulation of osmolytes in the cytoplasm is a common response of halophytes to high soil salinity. Soluble carbohydrates, such as sugars and polyols, are some of the compatible solutes used for osmotic adjustment and osmoprotection. Major carbohydrates were identified and quantified by high-performance anion-exchange chromatography, combined with pulsed amperometric detection (HPAEC-PAD), in five halophytic species from a Mediterranean salt marsh (Juncus acutus, Juncus maritimus, Plantago crassifolia, kola crithmoides and Sarcocornia fruticosa). Sucrose, followed by glucose and fructose were the more representative sugars detected in J. acutus and J. maritimus, and sorbitol the only soluble carbohydrate present at significant levels in P. fruticosa. In the other two taxa analyzed, no clearly predominant carbohydrates were observed: polyols (myoinositol and glycerol) seemed to be the most representative in I. crithmoides, albeit at relatively low concentrations, and sugars (sucrose and glucose) in S. fruticosa. Multivariate statistical analysis was used to correlate soil properties and meteorological conditions increasing soil salinity, with seasonal changes in carbohydrate contents, to establish their possible function as osmolytes and their contribution to salt tolerance in the investigated species. The obtained results confirmed sorbitol as the major functional osmolyte in P. crassifolia-as it has been described previously for other species of the genus-and suggested the participation of sucrose and, to a lesser extent, glucose and fructose in osmoregulatory mechanisms in J. acutus and J. maritimus.
Author Address [Gil, Ricardo; Vicente, Oscar] Univ Politecn Valencia, Inst Biol Mol & Celular Plantas UPV CSIC, Valencia 46022, Spain. [Lull, Cristina; Bautista, Inmaculada; Lidon, Antonio] Univ Politecn Valencia, Dept Ingn Hidraul & Medio Ambiente, Valencia 46022, Spain. [Boscaiu, Monica] Univ Politecn Valencia, Inst Agroforestal Mediterraneo, Valencia 46022, Spain. Vicente, O (reprint author), Univ Politecn Valencia, Inst Biol Mol & Celular Plantas UPV CSIC, CPI Edificio SE,Camino Vera S-N, Valencia 46022, Spain ovicente@ibmcp.upv.es
ISSN 0255-965X
ISBN 0255-965X
29-Character Source Abbreviation Not. Bot. Horti Agrobot. Cluj-Na.
Publication Date Jul-Dec
Year Published 2011
Volume 39
Issue 2
Beginning Page 9-17
Unique Article Identifier WOS:000297659600001
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