As the population is increasing and we face lack of land and water resources, usage of the plants which are resistant to salinity and are able to grew in difficult environment condition while having the highest efficiency is undeniable. So that we should be aware of plants germination needs. Medicinal plants are one of the most useful resources that are being used in different industries. Some of the most important factors in cultivating medicinal plants are determining the resistance to salinity and the best temperature for germination. So, in this research the effects of salinity stress (made by sodium chloride and calcium chloride) and temperature interaction on germination characteristics of hyssopus officinalis have been studied. The experiment is conduct on factorial basis and in a completely randomized design. In this experiment, different osmotic potentials (0, -3, -6 and -9 bar) and also different temperatures (20, 25, 30 and 35°C) are used in lab conditions and it has repeated three times. In this research, the percentage and rate of germination, the length of radicle and plumule, length ratio of radicle and plumule and vigor index characteristics has been measured. The results showed a significant effect of salt levels, osmotic potential and temperature on the above characteristics. The mean comparison for percentage and speed characteristics showed that calcium chloride with 63% and 7.11 respectively had a significant difference with sodium chloride with 50% and 1.7 and they have been categorized in different groups. Generally while the osmotic potential increases and temperature goes up to 30 centigrade degree all the characteristics in sodium chloride and calcium chloride had a remarkable reduction. Also increment of high temperatures had more harmful effects in NaCl than CaCl2.
کلید واژگان :Hyssop Hyssopus officinalis Salt stress Germination NaCl CaCl2
ارزش ریالی : 300000 ریال
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