《植物生理学报》 2017, 53(9): 1666-1672

毛棉杜鹃的组织培养与快速繁殖

赵富群^1,2, 尹茜², 洪文君^2,3, 唐光大^2,*

¹湖南环境生物职业技术学院园林学院, 湖南衡阳421005; ²华南农业大学中国南方石灰岩植物研究中心, 林学与风景园林学院, 广州510642; ³三亚市林业科学研究院, 海南三亚572000

通信作者：唐光大；E-mail: gatang@scau.edu.cn

摘　要：

以毛棉杜鹃种子为外植体, 采用丛生芽发生, 建立毛棉杜鹃组织培养与快速繁殖体系。结果表明, 毛棉杜鹃种子在0.6%琼脂和2.5%蔗糖的基本培养基中, 发芽率最高, 为64.6%。WPM培养基作为继代培养基, 植株状态最好, 培养60 d, 平均伸长长度达0.92 cm。最佳增殖培养基为Read+0.02 mg·L^-1 IBA +1.0 mg·L^-1 ZT, 培养60 d, 增殖倍数达4.50。最佳生根培养基为1/2WPM+1.0 mg·L^-1 IBA+0.02 mg·L^-1 ZT , 生根率高达83.33%。添加0.1%活性炭对苗高、生根率、生根数和根长均有较好的促进作用。组培苗移栽至泥炭土:珍珠岩(3:1)的培养穴盘中, 30 d后, 成活率超过90%。

关键词：毛棉杜鹃; 组织培养; 快速繁殖

收稿：2017-04-20   修定：2017-08-01

资助：广东省林业厅项目(粤财农[2017]83号)广州市科技计划项目(11C12100776/L1110887)。

Tissue culture and rapid propagation of Rhododendron moulmainense

ZHAO Fu-Qun^1,2, YIN Qian², HONG Wen-Jun^2,3, TANG Guang-Da^2,*

¹College of Landscape Architecture, Hunan Environmental-Biological Polytechnic College, Hengyang, Hunan 421005, China; ²South China Limestone Plants Research Center, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China; ³Sanya Academy of Forestry, Sanya, Hainan 572000, China

Corresponding author: TANG Guang-Da; E-mail: gatang@scau.edu.cn

Abstract:

The tissue culture and rapid propagation system of Rhododendron moulmainense was established by using the seeds as explants and by means of cluster buds cultivation. The results showed that in the basic medium of 0.6% agar and 2.5% sucrose, the germination rate (64.6%) was the highest. The best medium for subculture was WPM medium, in which the seedlings growth status were best and the average elongation reached 0.92 cm after 60 d. The best medium for multiplication was Read+0.02 mg·L^-1 IBA+1.0 mg·L^-1 ZT, and the propagation coefficient was 4.50 after 60 d. The best rooting medium was 1/2WPM+1.0 mg·L^-1 IBA+0.02 mg·L^-1 ZT, the rooting rate reached 83.33%. The supplement of 0.1% activated carbon could obviously promote the seedling height, rooting rate, rooting number and rooting length. Then these cultured seedlings were transplanted into the culture tray with peat soil:perlite (3:1), the survival rate was over 90% after 30 d.

Key words: Rhododendron moulmainense; tissue culture; rapid propagation