Influence of aging process on biochemical changes in sunflower seed

Abstract

This investigation was conducted in order to determine the degree of biochemical changes during accelerated and natural aging of sunflower seed. Five sunflower lines developed in Novi Sad, submitted to accelerated aging for three and five days, and natural aging of six and twelve months under conventional storage and controlled conditions, were used in these trials. Malondialdehyde, superoxide dismutase contents and peroxidase activities were studied. Lipid peroxidation and superoxide dismutase and peroxidase activities (especially pronounced in accelerated aging variant) were caused by both types of aging. The degree of seed damage and the ability of seed to resist the negative consequences of aging were influenced, beside duration of aging period, by type of storage and characteristics of sunflower lines.

Positional effects on soybean seed composition during storage

“…The results of these studies confirm the earlier reports that the increase in the lipid peroxidation during storage is associated with a corresponding decrease in the activity of peroxidase and catalase (Sharma et al 2005(Sharma et al , 2006Zhang and Kirkham 1996;Balesevic-Tubic et al 2005).The inhibition of free radical and peroxide scavenging enzymes may result in an increase in MDA level (Sung 1996;Sharma et al 2005). Several investigations have indicated that free radical induced lipid peroxidation can damage cell membranes and are likely to be primary cause of deterioration of aged seeds (Ponquett et al 1992).…”

“…These FFA are subjected to lipoxygenase leading to the formation of hydroperoxides (St Angelo and Ory 1983) and ultimately result in the accumulation of MDA (Robert et al 1980). Thus in oilseeds such as soybean and sunflower, autooxidation of lipids and increase in the content of FFA during storage are the main reasons for rapid deterioration of seeds (Balesevic-Tubic et al 2005).…”

“…The lipid related changes of seeds during storage revealed decline in phospholipids and polyunsaturated fatty acids leading to marked decline in seed vigor (Priestley and Leopold 1983). Auto-oxidation of lipids and increase in the content of free fatty acids during storage period are the main reasons for rapid deterioration of oil seeds (Balesevic-Tubic et al 2005). The ageing is also associated with accumulation of superoxide radical, H 2 O 2 and hydroxyl radical that damage cellular membranes, enzymes and nucleic acids (Sharma et al 2006).…”

Effect of Seed Storage Periods, Conditions and Materials on Seed Quality of Some Soybean Cultivars

“…The longer seeds storage period increases intensity of seeds ageing [10]. These results are in good agreement with many researchers [5,7,12,13,15,17,19].…”

Changes of enzymes activities in botanical treated aged seed of soybean (Glycine max (L.) Merrill) cv. CO 3 seeds

“…In soybean, auto oxidation of lipids and increased content of free fatty acids during storage period are the main reasons for rapid deterioration of oil seed crop as announced by Balasevic-Tubic et al (2005). Free fatty acid content was the highest in control among the treatments.…”