Seed Germination of Withania somnifera (L.) Dunal.
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Date
2014-08
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Abstract
Aim: Withania somnifera (L.) Dunal or Ashwagandha is a valuable medicinal plant having
a consistent demand in pharmaceutical industries. Traditionally it is propagated from
seeds but it’s germination capacity is poor. So in the present study different methods were
considered to sort out a suitable method that can be used for its cultivation in the field of
Hazaribag, Jharkhand, India.
Study Design: The study was done in the laboratory and field of Hazaribag, Jharkhand,
India.
Place and Duration of Study: Department of Botany, Vinoba Bhave University,
Hazaribag, Jharkhand, India. The study was carried out from July 2012 to August 2012
and again from mid June 2013 to August 2013.
Methodology: Different pre germination treatments including 24 hours water soaking , 48
hours water soaking, mechanical scarification, heat treatment at 50 degree Celsius (5min,
10min, 15min) and Gibberellic acid [GA3] (250μg/l, 500μg/l, 1000μg/l) treatments were
proposed. The mean germination percentage and the mean germination time were
calculated for each of the treatments.
Results: The results revealed that GA3 500μg/l treated seeds showed increased
germination percentage in laboratory (86±0.34%) and in soil (84.1±0.36%) as well as
reduced mean germination time in laboratory (5.8±0.41 days) and in soil (10.6±0.17
days). Whereas heat treatment at 50 degree Celsius (5min, 10min, 15min) drastically reduced germination percentage in laboratory (32±0.47%, 16±0.36%, 12±0.31%) and in
soil (51±0.49%, 49.6±0.49%, 32.2±0.46%), respectively.
Conclusion: Pre treating fresh seeds of Ashwagandha with GA3 500μg/l for 24 hours
before sowing can be adopted to overcome dormancy of seeds with good germination
percentage. Likewise mechanical scarification of seeds can also be taken into
consideration as an alternative, cost-effective and eco-friendly way to break seed
dormancy which has also given favourable results.
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Keywords
Withania somnifera, ashwagandha, pretreatment, seed germination percentage, mean germination time
Citation
Niyaz Afshan, Siddiqui Enam Nabi. Seed Germination of Withania somnifera (L.) Dunal. European Journal of Medicinal Plants. 2014 Aug; 4(8): 920-926.