Decrease in beech [Fagus sylvatica] seed viability caused by temperature and humidity conditions as related to membrane damage and lipid composition

• Autorzy: Ratajczak E , Pukacka S.
• Języki publikacji: EN

Abstrakty

EN

The aim of this study was to determine if the loss of germinability and viability of beech (Fagus sylvatica L.) seeds stored at different variants of temperature (4, 20, and 30 °C) and relative humidity (RH: 45 and 75 %) is associated with a loss of membrane integrity and changes in lipid composition. Beech seeds stored for 9 weeks gradually lost viability at a rate dependent on temperature and humidity. The harmful effect of temperature increased with growing humidity. The loss of seed viability was strongly correlated with an increase in membrane permeability and with production of lipid hydroxyperoxides (LHPO), which was regarded as an indicator of peroxidation of unsaturated fatty acids. The condition of membranes was assessed on the basis of their permeability and the state of lipid components: phospholipids and fatty acids. During seed storage we obterved a decline in concentration of individual phospholipids and fatty acids, proportional to the loss of seeds viability. We also detected a decrease in concentrations of α-tocopherol and sterols, which play an important role in protection of membranes against the harmful influence of the environment. Our results show that the germinability of beech seeds declines rapidly at temperature above 0 °C and growing humidity. This is due mainly to the loss ofmembrane integrity, caused by peroxidation of unsaturated fatty acids.

Słowa kluczowe

EN

alpha-tocopherol; plant physiology; Fagus sylvatica; beech; lipid composition; lipid peroxidation; phospholipid; temperature; dendrology; membrane damage; sterol; humidity condition; membrane permeability; fatty acid; seed viability

• Wydawca: -
• Czasopismo: Acta Physiologiae Plantarum
• Rocznik: 2005
• Tom: 27
• Numer: 1
• Opis fizyczny: p.3-12,fig.,ref.

Twórcy

autor

Ratajczak E

• Polish Academy of Sciences, Parkowa 5, 62-035 Kornik, Poland

autor

Pukacka S.

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