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《Weed Science》 2011-02
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Studies on Seeds Dormancy Breaking Methods of Redroot Pigweed (Amaranthus retroflexus L.)

MA Xiao-yan,MA Yan,XI Jian-ping,JIANG Wei-li,MA Ya-jie,LI Xi-feng(Cotton Research Institute,Chinese Academy of Agricultural Sciences/Key Laboratory of Cotton Genetic Improvement,Ministry of Agriculture,Anyang 455000,China)  
The effects of sodium hydroxide(NaOH),hydrochloric acid(HCl),gibberellins(GA3) and ethephon(ETH) treatment on seeds germination of redroot pigweed(Amaranthus retroflexus L.) were studied under light(12 hours day length) and dark conditions respectively.The results showed that seeds germination rate of redroot pigweed increased by soaking treatment using all four reagents with a unimodal trend as the increase of treating concentrations of reagents.Too high or too low treating concentration will bring negative effects on the seeds germination.Maximum germination rate 90.8% could be obtained by 200 mg/L GA3 soaking treatments for 24 hours,and the germination rate increased 52.5 percent points compared with the control.Germination rate could he oblained to 70%~75% by 4% NaOH or 6% HCl soaking treatment for 1 hour or 800 mg/L ETH treatment for 24 hours.Dark condition never showed positive effects on seeds sevmination of redroot pigweed under which the germination rate was slightly lower than that of light condition.
【Fund】: 中央级公益性科研院所基本科研业务专项(编号:SJB1103)
【CateGory Index】: S451
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