Effects of Different Treatment Methods on Virus Elimination of Chrysanthemum morifolium ＇Shenma

[Objective]The paper was to explore the virus elimination technique of Chrysanthemum morifolium′Shenma′.[Method]With C.morifolium ′Shenma′as the test materials,the virus elimination effects of shoot-tip treatment,shoot-tip with virazole treatment and shoot-tip with heat treatment were used to study the effect of virus elimination in the paper.The shoot-tips with the lengths of 0.2-0.3,0.4-0.5,0.6-0.8 and 0.9-1.0 mm were cultured by the shoot-tip treatment.A randomized complete blocks design was conducted to screen the best shoot-tip length and virazole concentration by shoot-tip with virazole treatment.The test-tube seedling were cultured by the method of variable temperature at day and night and stepwise temperature rising.ELISA test was used to identify the elimination efficiencies.[Result]The shoot-tip with the length of 0.4-0.5 mm was the best in shoot-tip treatment;the combination of shoot-tip length of 0.4-0.5mm and virazole mass concentration of 10 mg/L was the best in shoot-tip with virazole treatment;the shoot-tip with the length of 0.4-0.5 mm stripped after heat treatment for 45d was the best in shoot-tip with heat treatment.[Conclusion]The study provides an effective way for virus elimination in C. morifolium′Shenma′.