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Title

STUDY OF FENNEL GERMINATION (FOENICULUM VULGARE M) AS AFFECTED BY OSMOPRIMING PRETREATMENT AT VARIOUS LEVELS OF SALT STRESS

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 Start Page 15 | End Page 28

Abstract

 In order to evaluate the effect of OSMOPRIMING PRETREATMENT of FENNEL SEED GERMINATION, this study was done, under SALT STRESS conditions. A factoring experiment based on completely randomized design was conducted with three replications. The experimental factors were cultivars of Soroksari and Iranian population (from Isfahan Province), six levels of OSMOPRIMING PRETREATMENT (0, -1/15, -1/9, -3/5, -4/8, -6/5 bar), and five levels of SALT STRESS (0, 40, 80, 120, 160 mmol/l NaCI). At the first stage, seeds were immersed in different levels of OSMOPRIMING PRETREATMENT for 24 hours at laboratory temperature (20oC) and they were then treated with five levels of SALT STRESS. Results showed that there were significant differences between Soroksari cultivar and Iranian population in terms of germination parameters: percent of germination, length ofradic1es, length of seedling, fresh weight and dry weight of seedlings, whereas there were no significant differences in germination speed and mean of germination period. Interaction effects of cultivar, pretreatment and SALT STRESS was significant. The best characteristics of germination were observed at OSMOPRIMING PRETREATMENT of -1/15 bar and salinity of 0 mmol/l NaCl. By increasing salinity, Soroksari cultivar had bettetr SEED GERMINATION than Iranian population. Therefore Soroksari cultivar was more tolerance than Iranian population to SALT STRESS.

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