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摘要: 以天目杜鹃Rhododendron fortunei组培苗的不定芽为外植体,采用单因子实验从基本培养基、生长素以及蔗糖质量浓度对其适宜培养条件进行了筛选。结果表明:在1/2WPM(wood planty medium)基本培养基中,天目杜鹃组培苗的生根率、平均根长及平均根数显著高于MS(Murashige and Skoog),1/2MS和1/4MS 培养基(P<0.05),分别为100%,0.49 cm 和18.9条。添加生长素萘乙酸(NAA)和吲哚丁酸(IBA)均可以促进天目杜鹃组培苗生根,在添加2.0 mgL-1NAA的1/2MS培养基中的组培苗生根率、平均根长与平均根数均与其余处理间存在显著性差异,分别为100%,0.4 cm 和 9.0条;其中在添加0.5 mgL-1IBA的1/2MS培养基中的组培苗生根率、平均根长与平均根数均与其余处理间存在显著性差异,分别为100%,0.38 cm 和 8.0条;附加5 gL-1蔗糖的1/2MS培养基中组培苗的生根率、平均根长及平均根数显著高于培养基中附加0,10,15,20,25以及30 gL-1蔗糖(P<0.05),分别为90.67%,0.36 cm 和7.2 条。天目杜鹃组培苗最适生根培养基为1/2WPM + 0.5 mgL-1 IBA + 5.0 gL-1蔗糖。图1表1参10Abstract: To establish a micro propagation of Rhododendron fortunei,in vitro shoots were used as the explants to establish a rooting system for Rhododendron fortunei. Effects on the basal mediums [1/2 woody plant medium (WPM),Murashige Skoog (MS),1/2MS,and 1/4MS)],auxins [naphthalene-acetic acid (NAA) and indole-3-butyric acid (IBA)],and sucrose during adventitious root induction were comparatively analyzed by a split plot design experimental design. Results showed that in vitro shoots of R. fortunei inoculated in 1/2 WPM basal medium were significantly higher (P<0.05) than treatments of MS,1/2 MS,and 1/4 MS basal medium,with a rooting percentage of 100%. In vitro shoots for 1/2 MS basal medium supplemented with 2.0 mgL-1 NAA were significantly higher (P<0.05) than other NAA treatments with a root percentage of 100%. In vitro shoots in 1/2 MS basal medium supplemented with 0.5 mgL-1 IBA were significantly higher (P< 0.05) than other IBA treatments with a root percentage of 100%. The result showed that Rhododendron fortunei the optimal con-centration of sucrose was 5 gL-1,which was significantly higher (P<0.05) than other sucrose treatments with a rooting percentage of 90.67%. Thus,the optimal rooting medium for R. fortunei was 1/2 WPM + 2.0 mgL-1 NAA + 5.0 gL-1 sucrose. [Ch,1 fig. 1 tab. 10 ref.]
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Key words:
- botany /
- Rhododendron fortunei /
- in vitro shoots /
- basal medium /
- auxin /
- sucrose
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2011.06.024
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