Effects of different priming treatments on seed vigor and physiological characteristics of spring wheat
[Objective]To study the effects of different seed priming on seed germination and seedling growth characteristics of spring wheat in the hope of providing theoretical basis for improving seed vitality of the wheat.[Methods]Xinchun 26 wheat seeds were taken as the test material,and primed with different concen-trations of SA(0.05,0.1,0.15 mmol/L),CaCl2(6,9,12 mmol/L)and water for different time 4,6,8,10,12 and 14 h,respectively to measure the indexes such as the germination potential,germination rate,ger-mination index,vigor index,fresh dry weight and length of seedling and root,electrical conductivity,SOD ac-tivity,POD activity,dehydrogenase activity and MDA content and other factors.[Results]The results showed that the seed germination potential,germination rate,germination index,vigor index,fresh dry weight,seed-ling length and root length,SOD,POD,dehydrogenase activity and other indexes of spring wheat treated with different initiators were significantly increased compared with the control,and the electrical conductivity and malondialdehyde content were significantly decreased,among which A2 and B1 treatments had the best effect.Under the condition of different priming time,germination index,seedling growth index and physiological in-dex of each initiator treatment reached the maximum value at 12 h,and there was significant difference be-tween them and other priming time.[Conclusion]Seed priming enhances the enzyme activity of spring wheat seeds,effectively resists membrane peroxidation,reduces the content of membrane peroxidation products,maintains the integrity of cell structure,and effectively improves the seed activity of spring wheat,and pro-motes the growth of seedlings.Among them,0.1 mmol/L SA and 6 mmol/L CaCl2 have the best effect on the priming time of 12 h.
spring wheatseed primingseed vigorphysiological characters
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