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植物研究 ›› 2021, Vol. 41 ›› Issue (3): 321-328.doi: 10.7525/j.issn.1673-5102.2021.03.001

• 研究报告 •    下一篇

耐冬山茶子叶再生体系的研究

田红梅, 郭霄, 王奎玲, 孙迎坤()   

  1. 青岛农业大学园林与林学院,青岛 266109
  • 收稿日期:2019-11-25 出版日期:2021-05-20 发布日期:2021-03-24
  • 通讯作者: 孙迎坤 E-mail:sunyk678@163.com
  • 作者简介:田红梅(1994-),女,硕士研究生,主要研究方向为园林植物遗传育种。
  • 基金资助:
    青岛市民生科技计划项目(17-3-3-47-nsh);国家自然科学基金(31500264);山东林业科技创新(LYCX01-2018-05)

Plant Regeneration System from Cotyledon of Camellia japonica (Naidong)

Hong-Mei TIAN, Xiao GUO, Kui-Ling WANG, Ying-Kun SUN()   

  1. College of Landscape Architecture and Forestry,Qingdao Agricultural Uuiversity,Qingdao 266109
  • Received:2019-11-25 Online:2021-05-20 Published:2021-03-24
  • Contact: Ying-Kun SUN E-mail:sunyk678@163.com
  • About author:TIAN Hong-Mei(1994-),female,master,major in the landscape plant genetic breeding.
  • Supported by:
    Minsheng Science and Technology Project of Qingdao(17-3-3-47-nsh);National Natural Science Foundation of China(31500264);Innovation of Forestry Science and Technology in Shandong Province(LYCX01-2018-05)

摘要:

青岛市市花——耐冬山茶为北方珍贵的冬季观赏物种,目前其栽培数量不能满足园林应用,亟需通过组培扩繁。以耐冬山茶的子叶为外植体,探讨不同因素对子叶愈伤组织诱导及植株再生的影响。结果表明,使用2%的NaClo对耐冬山茶果实灭菌的较佳时间是8 min,子叶愈伤组织的诱导率为100%。耐冬山茶子叶愈伤组织增殖的较优激素配比为0.5 mg·L-1 NAA+1.5 mg·L-1 6-BA,其最大增殖量为4.06。将经过2次转接继代培养后的愈伤组织转入不定芽分化培养基MS+1.0mg/LNAA+10.0 mg·L-1 6-BA进行不定芽的分化诱导,不定芽的分化率为10.7%。将耐冬山茶的不定芽芽条基部浸没在500 mg·L-1的IBA溶液中70 min,再转接到1/2MS固体培养基,生根率达40%,成功建立了耐冬山茶子叶的植株再生体系。

关键词: 耐冬山茶, 子叶, 愈伤组织, 植株再生

Abstract:

As the floral emblem of Qingdao,Camellia japonica(Naidong) is a precious ornamental species during the winter of the north, but the quantity of C. japonica(Naidong) cultivars cannot meet requirements for application in landscape at present, so it is necessary to enlarge propagation by the means of tissue culture. In order to establish the regeneration system of C. japonica(Naidong), different factors affected on callus induction and plantlet regeneration were studied from mature cotyledons of C. japonica (Naidong). The optimum timing of sterilization in C. japonica(Naidong) seeds was soaked for 8 min in the 2% NaClo, callus induction rate was 100%. The optimal hormone combination of cotyledon callus subculture was 0.5 mg·L-1 NAA+1.5 mg·L-1 6-BA, the multiplication rate was 4.06. After 2-time subcultured, the callus was transferred to MS+1.0mg·L-1 NAA+10.0 mg·L-1 6-BA for differentiation of adventitious buds, the rate of adventitious bud differentiation was 10.7%. The shoot base was immersed in 500 mg·L-1 IBA solution for 70 min, then transferred to 1/2MS, the rate of rooting could reach 40%. Regeneration system from mature cotyledons of C.japonica(Naidong) by inducing callus, adventitiousshoots and roots was established, which would provide technical support for the vegetative production and innovation of its germplasm resources.

Key words: Camellia japonica(Naidong), cotyledon, callus, plantlet regeneration

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