Investigation of germination and overcome to seed dormancy of Thymus species in Iran.
2009
Sharifi A`shur Abadi, Ebrahim | Nasiri, Mohsen
Various species of the Thymus (belog to Lamiaceae family) have many uses in food, sanitary, cosmetics and inparticular pharmaceutical industries. In present study , lack of seed germination of the Thyme samples in Natural Resources Gene Bank as well as the samples collected in the course of the national project were examined for the germination percentage and breaking the seed dormancy tests. Based on the tetrazolium test, it was found that lack of seed germination for the gene bank samples was due to long storage time as well as inappropriate seed collection time. Although, using tetrazolium test, acceptable percent of seed viability was obtained, but the result was not confirmed on filter paper. Thus, lack of outdoor seed germination and establishment may be resulted from seed deterioration and inappropriate collection time. Results indicated that the maximum chilling treatment should not exceed one month. There was not any significant difference between the treatments in terms of increasing chilling period and also maintaining the seed for long time would result in lower germination rate. It is suggested that regeneration for must be set each 5 year for the Thymus spp.
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