Effects of 60Co-γ irradiation on seed germination and seedling growth of pomegranate
The seeds of Tunisia soft seed were irradiated with 100 Gy,200 Gy,300 Gy and 400 Gy by 60Co-γ irradiation,and the effects of irradiation on seed germination,seedling growth and leaf physiology and biochemistry were analyzed.The results showed that 60Co-γ irradiation inhibited seed germination and seedling growth,and the greater the dose,the stronger the inhibition effect was.Low dose(≤300 Gy)60Co-γ irradiation inhibited the accumulation of soluble sugar in seedling leaves,while high dose(>300 Gy)60Co-γ irradiation promoted the accumulation of soluble sugar in seedling leaves.The contents of soluble protein and chlorophyll in leaves of seedlings were increased by irradiation with 60Co-γ irradiation,and the contents of soluble protein and chlorophyll were increased most at 200 Gy.The optimal radiation dose range of pomegranate seeds was 268.22～322.54 Gy.
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