Evaluation in some seed quality characters (germination, rate of germination and vigor index) of Moldavian balm (Dracocephalum moldavica L.) using accelerated aging test

Document Type : Research Paper

Authors

1 Postgraduate Student, Department of Agronomy, University of Tehran

2 Reaserch Institute of Forests and Rangelands, P.O.Box 31585-343, Karaj,

Abstract

For evaluation of seed quality traits (germination percent, rate of germination and vigor index) in Moldavian balm (Dracocephalum moldavica L.) an experiment was conducted using accelerated aging test (AAT) under laboratory condition. The seed samples were subjected to 40 0C in 100% relative humidity for 0, 12, 24, 48 and 72 hours. A completely randomized design with 3 replications was used. The results showed significant differences among treatments for germination percent, rate of germination and vigor index. There were no significant differences between 0, 12 and 24 hours AAT treatments for germination percent and rate of germination, but AAT treatments for 48 and 72 hours significantly decreased germination percent and rate of germination compare to 0, 12 and 24 hours. Increasing the time of AAT treatments decreased all of the three seed quality characters. The vigor index was affected more than the two other quality characters. The effect of AAT duration treatments on vigor index reduction was as fallow: 0 > 18, 24 > 48, 72. It is concluded that under conditions of this experiment, the vigor index is more sensitive trait for seed quality evaluation of moldavian balm (Deracocephalum moldavica L.) seeds.

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References

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