Membrane permeability and micro- and macroelement accumulation in spring wheat cultivars during the short-term effect of salinity- and PEG-induced water stress

• Autorzy: Filek M. , Walas S. , Mrowiec H. , Rudolphy-Skorska E. , Sieprawska A. , Biesaga-Koscielniak J.
• Języki publikacji: EN

Abstrakty

EN

The comparative responses of ten spring wheat cultivars to water stress were investigated. Wheat plants were cultured under hydroponics conditions (Hoagland nutrient) to the stage of three-leaf seedlings. Then, the water medium was supplemented with PEG (drought) or NaCl (salinity) to obtain a water status equal to -1.5 MPa. After a 2-day treatment, the changes in the following parameters were determined: fresh and dry weight, macroand microelement accumulation, membrane injury (electrolyte leakage, lipid peroxidation) and fatty acid content of the phospholipid fraction of plasmalemma (in comparison to plants not stressed, taken as a control). Generally, the plants were more significantly influenced by water stress stimulated by PEG than by NaCl treatment, as compared to the plants cultivated in the control media. The results of the decrease in water content in leaves and electrolyte leakage from cells corresponded well with the intensity of lipid peroxidation (determined by malondialdehyde—MDAcontent) and were chosen for the selection of investigated genotypes for tolerance to both stresses. The more tolerant genotypes exhibited the opposite changes in phospholipid fatty acid unsaturation for two applied stresses i.e. NaCl treatment caused a decrease in unsaturation whereas in PEG-treated plants an increase in unsaturation was observed. These changes were reversed for less tolerant plants, i.e. NaCl treatment influenced an increase in fatty acid unsaturation whereas in PEG-treated plants a decrease in unsaturation was measured. The ratio of U/S (unsaturated to saturated fatty acids) correlated with the total amount of accumulated macroelements. The content of Mg, Ca and S in leaves of plants undergoing both stress factors (NaCl and PEG) dropped whereas the K and P content increased in leaves of wheat seedlings cultured on media containing NaCl only. For microelements, a decrease in the accumulation of these nutrients was detected in all investigated seedlings. However, a greater reduction in the level of these elements occurred in seedlings grown on media with PEG in comparison to those grown on NaCl containing media.

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2012
• Tom: 34
• Numer: 3
• Opis fizyczny: p.985-995,fig.,ref.

Twórcy

autor

Filek M.

• Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland

autor

Walas S.

• Department of Chemistry, Jagiellonian University, Ingardena 3, 30-360 Krakow, Poland

autor

Mrowiec H.

• Department of Chemistry, Jagiellonian University, Ingardena 3, 30-360 Krakow, Poland

autor

Rudolphy-Skorska E.

• Institute of Biology, Pedagogical University, Podbrzezie 3, 31-054 Krakow, Poland

autor

Sieprawska A.

• Institute of Biology, Pedagogical University, Podbrzezie 3, 31-054 Krakow, Poland

autor

Biesaga-Koscielniak J.

• Institute of Plant Physiology, Polish Academy of Sciences, Niezapominajek 21, 30-239 Krakow, Poland

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