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K. Kocheva Bulgarian Academy of Sciences Institute of Plant Physiology ‘Acad. G. Bonchev’ str., bl. 21 Sofia 1113 Bulgaria

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T. Kartseva Bulgarian Academy of Sciences Institute of Genetics Tzarigradsko shosse, 13 km Sofia 1113 Bulgaria

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S. Landjeva Bulgarian Academy of Sciences Institute of Genetics Tzarigradsko shosse, 13 km Sofia 1113 Bulgaria

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G. Georgiev Bulgarian Academy of Sciences Institute of Plant Physiology ‘Acad. G. Bonchev’ str., bl. 21 Sofia 1113 Bulgaria

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In the present study the physiological status of two wheat ( Triticum aestivum L.) cultivars subjected to polyethylene glycol-induced dehydration is evaluated. Wheat seedlings were exposed to either 8-d-long mild (15% PEG) or 24-h-long severe (30% PEG) osmotic stress by immersing their roots in PEG-supplemented Knop nutrient solution. Relative water content in the leaves and the levels of free proline, malondialdehyde, and hydrogen peroxide were chosen as indicative parameters corresponding to the degree of stress of the treated plants. Electrolyte leakage from leaf tissues of control and stressed plants was compared in terms of the common parameter Injury index used for characterizing cell membrane stability. In addition, a model test system was established for preliminary stress evaluation based on the kinetics of ion leakage. Short-term exposure to higher concentration of PEG was considered to be more harmful than prolonged mild stress as judged by RWC, proline and hydrogen peroxide accumulation, and injury index. The two cultivars demonstrated more obvious dissimilarities under conditions of prolonged mild stress than under severe stress.

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Cereal Research Communications
Language English
Size A4
Year of
Foundation
1973
Volumes
per Year
1
Issues
per Year
4
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 0133-3720 (Print)
ISSN 1788-9170 (Online)