The effects of pre-storage treatments on ageing in onion seeds
2002
IIbi, H. | Eser, B.
In this study, the possibility of controlling ageing processes in onion seed using pre-storage treatments was investigated. Onion seeds cv. Texas Early Grano were treated with two different potassium salts (0.1M KNO(3) and 0.1M KH(2)PO(4)) prior to storage. Both potassium treated seeds and untreated seeds (control) were stored at various combinations of seed moisture content (6%, 9% and 12%) and temperature (5ºC and 30ºC) for up to one year. Potassium treatment of seeds stored at 5ºC had no significant effect on germination. However, depending on the moisture content of seeds stored at 30ºC, treatments enhanced germination capacity by delaying the ageing rate of seeds. Besides improved germination capacity, potassium treatments prior to storage resulted in an increase in protein and sugar content and a decrease in amino acid leakage of seeds. This indicates that the effect of the treatments on the control of the ageing process is probably due to a delay of the deterioration in membrane integrity and protein degradation in onion seeds.
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