كليدواژه :
Dormancy , بنزيل آدنين , Bunium Persicum , خفتگي دانه , Seed germination , جوانه زني , Benzyl Adenin , كشاورزي , زيره سياه
چكيده لاتين :
Bunium persicum is an umbelifer growing wild on mountains of IRAN. The species found only in some natural habitate and isnʹt cultivated because their seeds are dormant. Some physical and chemical agents affects germination of seeds and overcome seed dormancy in plants.The purpose of this research was to found suitable treatments for breaking dormancy in Bunium persicum seeds. Different concentrations of KNO3, Polyethylen Glycol, Thiourea, NaEDTA, Gibberellic Acid (GA3), Kinetin(KI), Benzyladenin(BA), NaEDTA +BA, BA+GA3 and PEG+BA were used to release seed dormancy. In these experiments two light (Darkness and 8h light: 16h darkness) and temperature (15 and 20°C) conditions were used. There was no significant difference in germination in two light treatments but germination was occurred better in 15°C. In this condition (15°C and darkness) BA(10^-5M) + GA3 (10 mgl^-1), BA(10^-5M) + PEG(%3), BA(10^-5M), BA(10^-5M) + NaEDTA(10^-3M), K1(10^-5M) substantialy decrease dormancy of Bunium persicum seeds. BA(10^-5M) +GA3(10mgl^-1) treatment showed greatest germination percentage(%96.87) and in BA (10^-5M) + PEG(3%), BA(10^-5M), BA(10-5M)+ NaEDTA (10-3M) and KI(10^-5M) treatments subsequently 89.06,76.56,64.06 and %57.8 of seeds were germinated. GA3(10, 100mg1^4), KI(10^4M) and BA (10^4M) treatment slightly promoted Bunium persicum seed germination but applied concentration of KNO3, NaEDTA, Polyethylen Glycol and Thiorea were unable to break dormancy of the seeds.
