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Paper Information

Journal:   JOURNAL OF PLANT RESEARCH (IRANIAN JOURNAL OF BIOLOGY)   2015 , Volume 28 , Number 1; Page(s) 12 To 22.
 
Paper: 

THE EFFECT OF DIFFERENT TREATMENTS ON BREAKING SEEDS DORMANCY AND INDUCING GERMINATION OF THYMUS TRANSCAUCASICUS RONN. AND ZATARIA MOLTIFLORA BOISS

 
 
Author(s):  ASAADI A.M., HESHMATI GH.A.
 
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Abstract: 

Because of the importance of medicinal plants in curing diseases and the shortage of natural habitats, little reproduction rate and mass cutting of trees, it is necessary to program cultivation and naturalization of medicinal plants. The aim of this research was to determine the most suitable treatment to overcome seed dormancy and induce Thymus transcaucasicusand Zataria moltiflora to germinate. So, seeds of the species were collected from their original habitats and they underwent the treatments before their vegetation, including gibberellic acid (100, 500 and 1000 ppm), cold (10, 20 and 30 days), 1M thiourea and KNO3. The seeds were sown in petridishes for 15 days. This experiment was conducted in a completely randomized design with four replications. Results of the analysis showed that the effect of various treatmentson the percentages of Thymus transcaucasicus and Zataria moltiflora seeds germination were highly significant (p<0.01). Treatments of 100 ppm gibberellic acid and cold (10 and 20 days) have the highest effect on seeds germination percentage of Thymus transcaucasicus and KNO3 and cold (10 and 20 days) on Zataria moltiflora seeds. The highest and lowest vigor indices in Thymus transcaucasicus were seen under treatment of 100 ppm gibberellic acid (16.2) and KNO3 (2.4), and were also seen in Zataria moltiflora under treatment of 1 M thiourea (10.9) and cold for 20 days (1.37).

 
Keyword(s): GERMINATION, SEED DORMANCY, THYMUS TRANSCAUCASICUS, ZATARIA MOLTIFLORA
 
References: 
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