Seasonal changes in the levels of compatible osmolytes in three halophytic species of inland saline vegetation in Hungary

Éva P. Murakeözy, Zoltán Nagy, Claire Duhazé, Alain Bouchereau, Zoltán Tuba

Research output: Contribution to journalArticle

131 Citations (Scopus)

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) β-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.

Original languageEnglish
Pages (from-to)395-401
Number of pages7
JournalJournal of Plant Physiology
Volume160
Issue number4
DOIs
Publication statusPublished - Apr 1 2003

Keywords

  • Betaines
  • Camphorosma annua
  • Carbohydrates
  • Lepidium crassifolium
  • Limonium gmelini
  • Osmotic adjustment
  • Salt stress
  • Sodic soil

ASJC Scopus subject areas

  • Physiology
  • Agronomy and Crop Science
  • Plant Science

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