One of the effects of the decrease of water and salinity in soil is the reduction of growth and development and change in field development under such changes. In order to examine the effect of drought and salinity stress on germination indexes and proline change of marigold under the drought stress [0, -0.2, -0.4, -0.6, -0.8 and -1 MPa] and salinity stress [0, -0.2, -0.4, -0.6 and -0.8 MPa], two experiments were conducted in a randomized design with three replication. Results showed that drought and salinity stresses were significantly effective on germination percentage, germination rate, mean time to germination, normal seedling percentage, root and shoot length, Proline content, seed vigor, seedling dry weight, duration of reaching to %5 [D05], %10 [D10] and %20 percent of germination [D20]. Drought and salinity stresses caused reduction in germination percentage, germination rate, normal seedling percentage, root and shoot length, seed vigor, seedling dry weight and other hand increased the Proline content duration of reaching to %5 [D05], %10, [D10], %20 [D20] germination, proline and mean time to germination. The highest germination percent with the average of 84 percent was related to control condition, but with the increase in the salinity levels to - 0.8 MPa and drought stress to -1 MPa germination percentage was 24 and 23 percent respectively. Generally the highest amount of other measured indexes were related to control condition [non-stress] in both salinity and drought stress condition.
کلید واژگان :Calendula officinalis environmental stress growth
ارزش ریالی : 1200000 ریال
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