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    甘菊下胚轴离体再生体系的建立

    Establishing an in vitro regeneration system from hypocotyls of Chrysanthemum lavandulifolium.

    • 摘要: 以甘菊下胚轴为外植体,通过器官发生途径诱导不定芽分化,建立了甘菊下胚轴高效再生体系,为甘菊遗传转化体系的建立奠定了基础。结果表明:将甘菊种子播种于MS培养基上,置于黑暗条件下培养7 d可以迅速获得大量下胚轴;下胚轴在MS+1.0 mg/L 2, 4-D+0.5 mg/L 6-BA的培养基上培养15 d后,愈伤组织形成率最高为8666%,愈伤组织呈淡黄色,大小一致;将愈伤组织转接到MS培养基中培养30 d左右即可分化不定芽,不定芽分化率达25.50%,平均每个外植体产生不定芽数目为4.25个;不定芽在添加0.1 mg/L NAA的1/2 MS培养基中培养15 d后,生根率达到100%。生根试管苗出瓶后,经过适宜培养,均可以获得健壮的开花植株。

       

      Abstract: An efficient regeneration protocol had been established for plantlet regeneration from hypocotylinduced calli of Chrysanthemum lavandulifolium, which laid the foundation for genetic transformation of C. lavandulifolium. When long hypocotyls from the seeds that germinated in the dark for 7 days were cultured on the Murashige and Skoogs (MS) medium containing 1.0 mg/L 2, 4-dichlorophenoxyacetic acid (2, 4-D) and 0.5 mg/L 6-benzyl aminopurine(6-BA) for 15 days, the calli inducing rate could reach the maximum of 86.66%. The calli were light yellow with almost uniform size. Following approximately 30 days of culture on the MS medium, adventitious buds were differentiated. The highest adventitious bud rate (25.50%) with an average of about 4.25 adventitious buds per explant was obtained from calli cultured on a MS medium without 6-BA. The rooting rate was 100% when the adventitious buds were cultured on the 1/2 MS medium supplemented with 0.1 mg/L naphthaleneacetic acid (NAA) for 15 days. After acclimatized to greenhouse conditions, normal growth and blossom C. lavandulifolium plants were obtained.

       

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