赤霉素和乙烯利对桑树杂交组合种子发芽率的影响  

Effects of gibberellic acid and ethephon on seed germination rate of mulberry hybrid combinations

作　　者：邱长玉 朱方容 林强 曾燕蓉 陈小青 朱光书 李乙 唐燕梅 赖燕梅 石华月 陈芳 贾洪亮 

机构地区：[1]广西蚕业科学研究院,南宁530007 [2]广西林业勘测设计院,南宁530011

出　　处：《南方农业学报》2011年第12期1469-1472,共4页Journal of Southern Agriculture

基　　金：广西自然科学基金项目(桂科自0991177)

摘　　要：【目的】研究不同浓度赤霉素和乙烯利处理对不同品种桑种子发芽率的影响。【方法】以广西生产用桑树二倍体杂交组合桂桑优12、桂桑优62、沙2×伦109及三倍体杂交组合桑特优1号的种子为材料,采用50、100、200、500mg/kg赤霉素或乙烯利浸泡桑种12或24h后培养,测定种子发芽率。【结果】随着赤霉素和乙烯利浓度的提高,不同杂交组合桑种发芽率呈现先提高后降低的趋势。50、100、200mg/kg赤霉素和乙烯利均可不同程度提高3个二倍体桑树品种的发芽率,而500mg/kg赤霉素或乙烯利浓度抑制桑种子发芽,说明过高浓度的赤霉素和乙烯利对桑种生理生化反应有一定的抑制作用。50、100、200、500mg/kg的赤霉素和乙烯利处理三倍体杂交组合桑特优1号种子24h的效果明显优于12h,但差异不显著。【结论】综合考虑,在生产上可采用200mg/kg赤霉素或乙烯利浸泡桑种24h,可获得较高的发芽率。[Objective]The present experiment was conducted to investigate the effects of different concentration of gibberellic acid and ethephon on germination rate of mulberry seeds.[Method]The seeds of three mulberry diploid hybrid combinations,viz.,Guisangyou 12,Guisangyou 62,Sha 2×Lun 109 and one triploid hybrid combination Sangteyou 1 were treated with different concentrations of gibberellic acid and ethephon（50,100,200 and 500 mg/kg） for 12 and 24 h to determine the germination rate.[Result] With the increase of gibberellic acid and ethephon concentration,the germination rate of seeds from four mulberry hybrid combinations increased initially,followed by a decrease.Three concentrations of gibberellic acid and ethephon（50,100 and 200 mg/kg） increased the germination rate of three diploid mulberry varieties,while their 500 mg/kg concentration inhibited the germination of seeds.On comparing the duration of treatment,triploid hybrid seeds treated for 24 h with 50,100,200 and 500 mg/kg showed better germination compared to that of 12 h.[Conclusion]In conclusion,the mulberry seeds soaked in 200 mg/kg gibberellic acid or ethephon for 24 h resulted in best germination rates of hybrid mulberry seeds.

关 键 词：赤霉素 乙烯利 桑树杂交种组合 种子 发芽率 

分 类 号：S888.3[农业科学—特种经济动物饲养]