Abstract: The present study was carried out to elucidate the mechanism of seed deterioration in ageing Jamun seeds. The naturally dried (Jamun) seeds with the decline in water content show a corresponding decline in % germination. The damage caused by water removal are due to the production of reactive oxygen species which when produced in large amount are the source of damage to membrane lipids, proteins and nucleicacids. As a consequence, dessication tolerance and prolonged longevity in the dessicated state depend on the ability to scavenge the reactive oxygen species, by using scavenging enzymes. Battery of scavenging enzymessuch as Superoxide dismutase (SOD), Catalase (CAT), Ascorbate Peroxidase (APX) and Guaiacol peroxidase (GPX) are playing vital role in protecting ROS induced cellular damage. The fresh Jamun seeds exhibiting absolute germination recorded highest level of of scavenging enzymes SOD, CAT and APX both in the axis and cotyledons that were reduced gradually with decline in percent germination in response to ageing (slow drying). The decrease in germinability of Jamun seeds was correlated with the increased accumulation of total peroxides due to decrease in the activities of scavenging enzymes SOD, CAT and APX.
Keywords: Reactive Oxygen Species, Antioxidant Enzymes, Superoxide dismutase (SOD), Catalase (CAT), Ascorbate Peroxidase (APX).
Title: Impairment of Scavenging Enzymes mediated Seed Ageing in Jamun (Syzygium cuminii) seeds
Author: Jyoti Bakshi, S.C. Naithani
International Journal of Life Sciences Research
ISSN 2348-313X (Print), ISSN 2348-3148 (online)
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