ارزيابي تاثير سرما دهي مرطوب ، تيمارهاي هورموني و دوره انبارداري بر شكست خواب و القاء جوانه زني بذر زيره سياه

Dormancy-breaking in Bunium persicum (Boiss.) Seeds by Cold stratification, Dry Storage and some Phytohormones

Medicinal plants arc among valuable natural resources and sources of potentially curative safe drugs. They have been playing important roles in alleviating human sufferings by contributing herbal medicines in the primal)ʹ to health care systems of rural and remote hilly areas where the health of society depends on folklore and traditional systems of medication. On the other hand, most ercp seeds have within themselves the physiological phenomenon of dormancy atterb being harvested. Bunium persicum (Boiss.) B. Fedtsch, (orCarum persicum) is a grassy plant belonging to umbelliferae (Apiaceae) family with dormant seeds. It grows wildly on the mountainous areas of Iran. Several therapeutic properties including those rcloted [0 digestive disorders, urinal)ʹ tract disorders, diuretic gynaecologic. anti-convulsion, anti-helmetic as well as anti-asthrnu, anddyspnea, have been recognized and mentioned for the seeds of this plant as evident from ancient Iranian medical books. Because of these pharmaceutical effects, termination of seed dormancy before cultivation is necessary and important. Studies about the phenology of Bunium persicum show that the seeds gcrminat in spring and require exposure to cold temperature prior to germination. Also previous studies have shown that some concentration of plant growth regulators help the overcoming having seed dormancy in this plant. In this research. treatments were consisted of dry storage (the seeds having been collected in 2001 and in 2004), cold stratification (0, 2, ~, 6, 8, 10 weeks) at 4°C in refrigerator and treatment with plant growth regulators (GA3, KI. GA3+KI and H20).Simple and combined effects of trealments on seed germination were investigated and recorded following 3 weeks of being placed in a germirator. The treatments were arranged us a three level factorial. The data were analyzed and statistically compared rising on the basis of a Randomized Block Design of three replications. The results revealed that 10 weeks of cold stratification along with 3 years of dry storage could enhance seed germination to an acceptable level.