In vitro investigation of germination and establishment of Bitter cucumber (Citrullus colocynthis) during salt and drought Stresses

davari, A. (2013) In vitro investigation of germination and establishment of Bitter cucumber (Citrullus colocynthis) during salt and drought Stresses. Masters thesis, University of Zabol.

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Citrullus colocynthis (cocurbitaceae family) is an herbaceous perennial which dispread along various desert regions. It’s one of domestic plants of warm and arid regions in Asia and Africa that transmitted in warm and arid regions of Sistan & Balochestan and have precious value about industrial and medicinal use. Seed germination of this plant not happened easily. This research treated in2 way, first different treatments seeking to breaking dormancy of Citrullus colocynthis seed evaluated and then best treatment choose to produce plant and transition to pot condition. the treatments were include sulfuric acid 98: (H2 SO4) in 22 and 42 minutes time intervals, potassium nitrate (KNO3) 222:, hot water in 92 centigrade treatment of scratching by sand paper and for comparing this treatments, distilled water used as control in second step, short plants produced from best treatment of breaking dormancy were transited to 4 types of pets including 1 -sand 2 -sand and clay 3- sand, gravel and clay 4 -sand and clay, in order to pitching under salinity and drought stress have been transited. studying stresses include salinity factor in level 9 (2 , 2/1 , 2/2 , 2/4 , 2/6, 2/8, 1 , 1/2 , 1/4 mol/lit Nacl) and drought factor in level 5 (2 , 2/3, 2/6, 2/9, 1/2 Mpa) have been surveyed. The experiment was performed as a factorial in a completely randomized design with 4 repetitions during 15 days period. Results of variance analysis and mean comparison showed that there are significant differences in level .0.0 between treatments and different soil types. this research showed that best treatment for breaking dormancy is scratching by sand paper and the best soil used is sandy soil and also tolerance threshold of plants to droughty is about ./0 Mpa and salinity tolerance threshold is 0 mol/Lit. However it should be noted that polar effect of different soil types and stresses upon measured traits have significant impact on 2221 statistical level.

Item Type: Thesis (Masters)
Uncontrolled Keywords: Citrullus colocynthis, breaking dormancy, salinity stress, drought stress
Subjects: S Agriculture > SB Plant culture
Depositing User: admin admin1 admin2
Date Deposited: 21 Jun 2016 08:07
Last Modified: 21 Jun 2016 08:07

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