title: Salt acclimation processes in wheat.
abstract: Young wheat plants (Triticum aestivum L. cv. Mv Béres) were exposed to 0 or 25 mM NaCl for 11 days (salt acclimation). Thereafter the plants were irrigated with 500 mM NaCl for 5 days (salt stress). Irrigating the plants with a low concentration of NaCl successfully led to a reduction in chlorotic symptoms and in the impairment of the photosynthetic processes when the plants were exposed to subsequent high-dose salt treatment. After exposure to a high concentration of NaCl there was no difference in leaf Na content between the salt-acclimated and non-acclimated plants, indicating that salt acclimation did not significantly modify Na transport to the shoots. While the polyamine level was lower in salt-treated plants than in the control, salt acclimation led to increased osmotic potential in the leaves. Similarly, the activities of certain antioxidant enzymes, namely glutathione reductase, catalase and ascorbate peroxidase, were significantly higher in salt-acclimated plants. The results also suggest that while SOS1, SOS2 or NHX2 do not play a decisive role in the salt acclimation processes in young wheat plants; another stress-related gene, WALI6, may contribute to the success of the salt acclimation processes. The present study suggested that the responses of wheat plants to acclimation with low level of salt and to treatment with high doses of salt may be fundamentally different.
authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-2462 Martonvásár, POB 19, Hungary. Electronic address: janda.tibor@agrar.mta.hu.
authors: Tibor
authors: T
authors: Janda
authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-2462 Martonvásár, POB 19, Hungary. Electronic address: darko.eva@agrar.mta.hu.
authors: Éva
authors: É
authors: Darko
authors: National Research Centre, El Buhouth St., Dokki, Cairo, Egypt. Electronic address: sami.shehata@gmail.com.
authors: Sami
authors: S
authors: Shehata
authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-2462 Martonvásár, POB 19, Hungary. Electronic address: kovacs.viktoria@agrar.mta.hu.
authors: Viktória
authors: V
authors: Kovács
authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-2462 Martonvásár, POB 19, Hungary. Electronic address: pal.magda@agrar.mta.hu.
authors: Magda
authors: M
authors: Pál
authors: Agricultural Institute, Centre for Agricultural Research, Hungarian Academy of Sciences, H-2462 Martonvásár, POB 19, Hungary. Electronic address: szalai.gabriella@agrar.mta.hu.
authors: Gabriella
authors: G
authors: Szalai
mesh_terms: D000064:Acclimatization / Q000187:drug effects*; D018506:Gene Expression Regulation, Plant / Q000187:drug effects*; D010940:Plant Proteins / Q000096:biosynthesis*; D054712:Salinity; D012965:Sodium Chloride / Q000494:pharmacology*; D014908:Triticum / Q000378:metabolism*
chemical_list: D010940:Plant Proteins; D012965:Sodium Chloride
keywords: Acclimation; Gene expression; Oxidative stress; Salinity; Triticum aestivum L.