In this paper, Glycine max L. seeds under accelerated ageing condition (40°C and 100% relative humidity) were used as experimental material to study the relationships between seed viability and cell death, production and scavenging of reactive oxygen species (ROS) during accelerated ageing. Water content of seeds gradually increased, while the final germination percentage, germination rate of seeds and fresh weight of seedlings produced decreased with increasing accelerated ageing time. The accelerated ageing time (T 50) when final seed germination decreased to 50% was about 10.5 days. During the period of accelerated ageing, the viability of root cells was lost gradually as manifested by the increase in staining with Evans blue. The respiration rate of seeds, ·O2 production rate, and H2O2 content of axes increased, peaked at the 10 days of accelerated ageing, and then decreased. Activities of superoxide dismutase, ascorbate peroxidase, catalase, and glutathione reductase of axes decreased; and malondialdehyde contents of axes markedly increased. A sceme to explain relationships between seed vigor, cell death, and production and scavenging of ROS during accelerated ageing was suggested.
Russian Journal of Plant Physiology – Springer Journals
Published: Jan 18, 2011
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