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金星蕨孢子繁殖无菌培养技术优化研究

Study on the optimization of sterile culture technique for spore propagation of Parathelypteris glanduligera (Kunze) Ching

  • 摘要: 采用正交试验设计法,通过孢子无菌培养,探明几种培养基因素对金星蕨的孢子再生过程的影响,以期为其孢子繁殖提供理论基础。结果表明,在9组正交试验处理下,孢子的萌发率为25%~70%,pH对孢子萌发具有显著影响(p<0.05),其他培养基因素无显著影响;原叶体在试验处理下均有不同程度的增殖,增殖范围为0.04~0.75 g,萘乙酸(NAA)和吲哚丁酸(IBA)分别对原叶体增殖具有极显著影响(p<0.01)和显著影响(p<0.05),其他培养基因素不显著;试验培养第30 d时孢子体最大分化数为5.33,3种培养基因素中,孢子体在含有1/4 MS培养基(Murashige and Skoog culture medium)或1/2 MS培养基的处理中均能分化,而在加入MS培养基的处理中未观察到分化,因此无机盐对孢子体分化具有极显著影响,其他培养基因素不显著;孢子体在接入生根培养基第10 d时有不定根长出,试验培养第14 d时最多生根数为5条,琼脂和无机盐对生根具有显著影响,其中琼脂影响极显著。

     

    Abstract: In order to provide a theoretical basis for spore reproduction, the orthogonal experimental design was used to explore the influence of several media factors on the regeneration process of Parathelypteris glanduligera (Kunze) Ching. Following results were obtained: by 9 groups of orthogonal tests, the germination rate of the spores was between 25% and 70%, pH had a significant effect (p<0.05) on spore germination, and no other media factors had a significant effect on spore germination.The prothallium exhibited varying degrees of proliferation, ranging from 0.04 g to 0.75 g under the test treatment. Naphthaleneacetic acid (NAA) and indolebutyric acid (IBA) had a significant effect on prothallium proliferation, and the significant values were p<0.01 and p<0.05, respectively, other media factors were not significant. The maximum number of sporophyte transformation was 5.33 after 30 d test culture. The transformation were successfully under media containing quartern Murashige and Skoog culture medium (MS culture medium) or half MS culture medium among the three media factors, while the sporophyte could not be induced under the medium adding MS culture medium. Therefore inorganic salts had a significant effect on sporophyte induction, and other media factors do not have signifcant effect.The sporophyte developed adventitious roots on the 10 d when cultured in rooting medium, and at 14 d of test culture, the maximum number of roots produced was 5. Agar and inorganic salts had a significant effect on rooting, and the significant values were p<0.01 and p<0.05, respectively.

     

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