Abstract

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Title:: Effect of Different Hormones on Epicotyl Germination of Oil-used Peony

Author(s):: LU Sen1; KANG Xingjiao2; ZHAO Yufen2; CHU Boyan2; (1.Flower Management Center of Hebei Province,Shijiazhuang,Hebei 050081；2.Hebei Academy of Forestry Science,Shijiazhuang,Hebei 050061)

Keywords:: oil tree peony; hormone; germination rate; germination index; the first sprouting day

Abstract:: To improve the germination rate and germination regularity of Paeonia ostii ‘Feng Dan Bai’ and provide theoretical basis for seedling production,the effects of different densities and treated time of 3 hormones (GA3,NAA and 6-BA respectively) on germination rate,germination index and first sprouting day of seeds of Paeonia ostii ‘Feng Dan Bai’ with radicle length greater than 3 cm were studied using full factor test method.The results showed that germination rate,germination index and first sprouting day of the seeds treated for 16 hours in 500 mg·L-1 GA3 were 98.89%,0.28 and 77.00 days respectively.The germination index was significantly higher than that of control experiment,and the first sprouting day arrived 13.33 days earlier than the control.However,there were no significant effects of NAA and 6-BA at low concentration 100 mg·L-1 on the hypocotyl growth of Paeonia ostii ‘Feng Dan Bai’.The two treatments of 300 mg·L-1 NAA and 6-BA treatment,500 mg·L-1 NAA and 6-BA treatment both had significantly inhibitory effects on the germination rate and germination index of Paeonia ostii ‘Feng Dan Bai’,regardless of the duration of seed soaking.Meanwhile,the 500 mg·L-1 NAA treatment significantly extended the first sprouting day,suggesting that the growth of Paeonia ostii seeds were seriously restrained by 500 mg·L-1 NAA treatment.