Changes in Antioxidant Enzyme Activity, Lipid Peroxidation and Seedling Growth of Cucumber Seed Induced by Hydropriming and Electric Field Treatments
Keywords:
hydropriming, electric field, germination, enzyme activity, malondiadehyde accumulationAbstract
Two cucumber seed lots ‘Bingo I’ (high germination) and ‘Bingo II’ (low germination) were subjected to hydropriming and electric field treatments. Hydropriming, which was conducted by incubating seeds (moisture content adjusted to 25-30%) for 3 days under 25oC and saturated humidity,
accelerated the speed of germination in both seed lots, also increased the germination percentage of ‘Bingo II’. Electric field treatment, which was carried out by exposing ‘Bingo I’ for 3 min to 5 kV/cm electric field, or exposing ‘Bingo II’ for 5 min to 3 kV/cm electric field, enhanced the germination percentage in ‘Bingo II’, but had no effect on ‘Bingo I’. Hydropriming accelerated seedling growth in ‘Bingo I’; electric field treatment, however, did not improve the seedling growth. Furthermore, the activities of superoxide dismuts, catalase and ascorbate peroxidase were increased remarkably in association with the reduction of malondialdehyde accumulation in these two seed lots after the two treatments.
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