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浙江大学学报(农业与生命科学版)  2019, Vol. 45 Issue (2): 157-163    DOI: 10.3785/j.issn.1008-9209.2018.03.261
园艺学     
蛛网萼未成熟种子培养与离体繁殖
曹丽雯1(),支肖1,戴嘉禾1,于宁宁1,陈怡倩1,叶立新2,陈利萍1(),徐礼根1()
1. 浙江大学农业与生物技术学院园艺系,杭州 310058
2. 浙江凤阳山-百山祖国家级自然保护区凤阳山管理处,浙江 丽水 323700
Immature seed culture and in vitro propagation of Platycrater arguta
Liwen CAO1(),Xiao ZHI1,Jiahe DAI1,Ningning YU1,Yiqian CHEN1,Lixin YE2,Liping CHEN1(),Ligen XU1()
1. Department of Horticulture, College of Agriculture and Biotechnology, Zhejiang University, Hangzhou 310058, China
2. Fengyangshan Administration Office, Fengyangshan-Baishanzu National Nature Reserve, Lishui 323700, Zhejiang, China
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摘要:

以国家二级濒危种蛛网萼为研究材料,通过未成熟种子离体培养、“芽生芽”离体繁殖、秋水仙素诱导、生根等组织培养技术开展物种的保护与繁殖研究。结果发现:蛛网萼未成熟种子培养在木本植物用培养基(woody plant medium, WPM)+400 mg/L谷氨酰胺+500 mg/L水解酪蛋白+2 000 mg/L活性炭培养基上可被诱导萌发,35 d萌发率达40%。以种子萌发的带腋芽实生苗茎段为外植体,在WPM附加1 mg/L 6-苄氨基嘌呤(6-benzylaminopurine, 6-BA)和0.5 mg/L α-萘乙酸(1-naphthylacetic acid, NAA)的培养基上培养有利于其芽的诱导与扩大繁殖;在附加200 mg/L秋水仙素的液体MS培养基上培养,可诱导出混倍体的芽。再生芽在WPM+0.5 mg/L 吲哚丁酸(indole butyric acid, IBA)培养基上进行生根并获得完整植株,部分植株野外回归至浙江凤阳山-百山祖国家级自然保护区中。本研究为解决蛛网萼种子萌发率差、植株生长缓慢、种群增强困难等问题提供了新途径。

关键词: 蛛网萼未成熟种子离体繁殖多倍体诱导野外回归    
Abstract:

Platycrater arguta, which is one of the Class Ⅱ national endangered species in China, was selected to conduct protective and reproductive study by tissue culture techniques including in vitro culture of immature seeds, in vitro propagation of shoot, colchicine induction, and taking root. When the immature seeds were cultured on the woody plant medium (WPM)+400 mg/L glutamine+500 mg/L casein hydrolysate+2 000 mg/L activated carbon, the germination rate of P. arguta could reach 40% after 35 d. As explants, stem segments of seedlings that germinated from immature seeds were cultured on WPM with different concentrations of 6-benzylaminopurine (6-BA) and 1-naphthylacetic acid (NAA), and MS mediums with different concentrations of colchicine, respectively. The results showed that the WPM with 1 mg/L 6-BA and 0.5 mg/L NAA was best for induction and growth of regeneration buds, and the MS medium with 200 mg/L colchicine could induce mixoploids. Finally, the regeneration buds were transplanted on a WPM supplemented with 0.5 g/mL indole butyric acid (IBA) to induce roots. Some of the plants have been returned to Fengyangshan-Baishanzu National Nature Reserve, Zhejiang. This study provides a new approach to solve the problems such as the poor seed germination rate of mature seed, slow plant growth and regeneration difficulty of P. arguta.

Key words: Platycrater arguta    immature seeds    in vitro propagation    polyploid induction    back to wild
收稿日期: 2018-03-26 出版日期: 2019-04-25
CLC:  S 688.9  
基金资助: 农业农村部“引进国际先进农业技术”项目(2011-G31);浙江省科技计划项目(2019C02026);浙江省重大科技专项重点社会发展项目(2015C03012)
通讯作者: 陈利萍,徐礼根     E-mail: 11216054@zju.edu.cn;chenliping@zju.edu.cn;xuligeng@126.com
作者简介: 曹丽雯(https://orcid.org/0000-0002-5589-4289),E-mail: 11216054@zju.edu.cn|陈利萍(https://orcid.org/0000-0002-3102-0640),E-mail: chenliping@zju.edu.cn|徐礼根(https://orcid.org/0000-0002-8195-7212), E-mail: xuligeng@126.com
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引用本文:

曹丽雯,支肖,戴嘉禾,于宁宁,陈怡倩,叶立新,陈利萍,徐礼根. 蛛网萼未成熟种子培养与离体繁殖[J]. 浙江大学学报(农业与生命科学版), 2019, 45(2): 157-163.

Liwen CAO,Xiao ZHI,Jiahe DAI,Ningning YU,Yiqian CHEN,Lixin YE,Liping CHEN,Ligen XU. Immature seed culture and in vitro propagation of Platycrater arguta. Journal of Zhejiang University (Agriculture and Life Sciences), 2019, 45(2): 157-163.

链接本文:

http://www.zjujournals.com/agr/CN/10.3785/j.issn.1008-9209.2018.03.261        http://www.zjujournals.com/agr/CN/Y2019/V45/I2/157

培养基名称

Medium name

基本成分

Elementary composition

其他成分

Other composition

种子萌发培养基

Medium for seed germination

WPM 400 mg/L谷氨酰胺+500 mg/L水解酪蛋白+2 000 mg/L活性炭

1号繁育培养基

No. 1 propagation medium

WPM 1 mg/L 6-BA+0.5 mg/L NAA

2号繁育培养基

No. 2 propagation medium

WPM 3 mg/L 6-BA+0.5 mg/L NAA

3号繁育培养基

No. 3 propagation medium

WPM 1 mg/L 6-BA+1 mg/L NAA

4号繁育培养基

No. 4 propagation medium

WPM 3 mg/L 6-BA+1 mg/L NAA

生根培养基

Rooting medium

WPM 0.5 mg/L IBA
表1  培养基成分
图1  蛛网萼未成熟种子离体培养

种子类型

Seed types

处理方法

Treatment

发芽率

Germination rate/%

方正汇总行未成熟种子

Immature seeds

种子萌发培养基

Medium for seed germination

40.00

成熟种子

Mature seeds

CK 0.00

种子萌发培养基

Medium for seed germination

0.00
表2  不同处理方法对蛛网萼种子萌发率的影响
图2  蛛网萼扩繁体系的建立

培养基种类

Medium type

存活率

Survival rate/%

平均起始株高

Average starting plant height/cm

平均终株高

Average final plant height/cm

平均生长高度变化率

Average height growth rate/%

1号繁育培养基

No. 1 propagation medium

100 0.49±0.13Ba 0.78±0.19Aa 61.54±7.54a

2号繁育培养基

No. 2 propagation medium

100 0.51±0.08Ba 0.70±0.09Aa 38.10±5.62b

3号繁育培养基

No. 3 propagation medium

100 0.44±0.11Ba 0.57±0.13Aa 33.62±7.65b

4号繁育培养基

No. 4 propagation medium

100 0.48±0.19Ba 0.58±0.19Aa 24.94±9.65b
表3  不同植物生长调节剂浓度处理对蛛网萼生长的影响
图 3  不同质量浓度的秋水仙素处理后蛛网萼的流式细胞分析图

ρ(秋水仙素)

Concentrations of colchicine/(mg/L)

存活率

Survival rate/%

100 77.89±11.06a
200 55.67±11.33a
300 11.00±11.00b
500 0.00±0.00b
表4  不同质量浓度的秋水仙素对蛛网萼存活率的影响

ρ(秋水仙素)

Concentrations of colchicine/(mg/L)

诱导混倍体芽的个数

Numbers of induced buds of mixoploids

100 2
200 5
300 0
500 0
表5  不同质量浓度的秋水仙素诱导对蛛网萼混倍体芽个数的影响
图4  蛛网萼生根与移栽炼苗
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