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Publication Type J
Authors Murakeozy, E. P., Z. Nagy, C. Duhaze, A. Bouchereau and Z. Tuba
Title Seasonal changes in the levels of compatible osmolytes in three halophytic species of inland saline vegetation in Hungary
Source Journal of Plant Physiology
Author Keywords betaines; Camphorosma annua; carbohydrates; Lepidium crassifolium; Limonium gmelini; osmotic adjustment; salt stress; sodic soil salt tolerance; stress; plants; water; plumbaginaceae; accumulation; polyols; proline
Abstract Seasonal changes in the leaf concentration of compatible osmolytes were investigated in three halophytic species (Lepidium crassifolium, Camphorosma annua and Limonium gmelini subsp. hungaricum) native to a salty-sodic grassland. The investigated species were shown to accumulate both carbohydrate- and amino acid-derived osmolytes. The leaf tissues of C. annua (Chenopodiaceae) preferentially stored glycine betaine and pinitol, while in L. gmelini (Plumbaginaceae) beta-alanine betaine, choline-O-sulphate, and pinitol were accumulated. In the leaves of L. crassifolium (Brassicaceae) a very high amount of proline, associated with a high level of soluble carbohydrates was found. Not only the biochemical nature of the osmolyte, but also the seasonal pattern of osmolyte accumulation showed significant species- specific fluctuations. In addition, the cellular levels of the observed osmolytes changed with the growth period and according to the environmental parameters. The highest concentrations of osmolytes were found in March, when low temperatures, hypoxic conditions and high salt concentrations were the main constraints to plant growth. The high structural diversity of osmolytes combined with their multifunctionality and the seasonal flexibility of the metabolism in plants facing multiple stresses is discussed.
Author Address Szent Istvan Univ, Dept Bot & Plant Physiol, Peter Karoly 1, H- 2103 Godollo, Hungary Szent Istvan Univ, Dept Bot & Plant Physiol, H-2103 Godollo, Hungary Univ Rennes 1, ICM, CNRS, UMR 6026, F-35042 Rennes, France Nagy Z Szent Istvan Univ, Dept Bot & Plant Physiol, Peter Karoly 1, H-2103 Godollo, Hungary
29-Character Source Abbreviation J. Plant Physiol.
Publication Date Apr
Year Published 2003
Volume 160
Issue 4
Beginning Page 395-401
Unique Article Identifier ISI:000182473900008
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