甘蓝型油菜再生体系中的种子灭菌和生根培养基的优化

傅淑; 刘昭霞; 陈金芝; 孙庚晓; 孙翠英; 陈进; 杨广

doi:10.19303/j.issn.1008-0384.2019.12.003

甘蓝型油菜再生体系中的种子灭菌和生根培养基的优化

doi: 10.19303/j.issn.1008-0384.2019.12.003

傅淑^{1, 2, 3,},
刘昭霞^{1, 2, 3},
陈金芝^{1, 2, 3},
孙庚晓^{1, 2, 3},
孙翠英^{1, 2, 3},
陈进^{1, 2, 3},
杨广^{1, 2, 3, ,}

1.
闽台作物有害生物生态防控国家重点实验室/福建农林大学应用生态研究所，福建　福州　350002
2.
教育部害虫生态防控国际合作联合实验室，福建　福州　350002
3.
害虫绿色防控福建省高等学校重点实验室，福建　福州　350002

基金项目: 福建省科技重大专项（2018NZ0002）；福建农林大学科技创新专项基金（CXZX2018091）

详细信息

作者简介:
傅淑（1988−），男，博士研究生，主要从事植物介导RNAi防治小菜蛾的研究（E-mail：fushu881219@163.com）

通讯作者:
杨广（1973−），男，博士，教授，主要从事昆虫化学生态学和分子生物学的研究（E-mail：yxg@fafu.edu.cn）

中图分类号: S 565.4
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出版历程
- 收稿日期: 2019-11-18
- 修回日期: 2019-12-09
- 刊出日期: 2019-12-01

Optimization of Seed Sterilization and Rooting Medium for Regeneration of Brassica napus

FU Shu^{1, 2, 3
,},
LIU Zhao-xia^{1, 2, 3},
CHEN Jin-zhi^{1, 2, 3},
SUN Geng-xiao^{1, 2, 3},
SUN Cui-ying^{1, 2, 3},
CHEN Jin^{1, 2, 3},
YANG Guang^{1, 2, 3
, ,}

1.
State Key Laboratory of Ecological Pest Control for Fujian and Taiwan Crops/ Institute of Applied Ecology, Fuzhou, Fujian　350002, China
2.
Joint International Research Laboratory of Ecological Pest Control, Ministry of Education, Fuzhou, Fujian　350002, China
3.
Key Laboratory of Green Control of Insect Pests (Fujian Province University), Fuzhou, Fujian　350002, China

摘要

摘要: 目的植物的种子灭菌和生根培养是组织培养的重要步骤。目前已报道的用于甘蓝型油菜种子灭菌的次氯酸钠（NaClO）浓度、灭菌时间和生根培养基的植物生长调节剂种类及其浓度均存在较大的差异，因此，本研究旨在筛选出甘蓝型油菜种子的最佳NaClO灭菌处理方法和生根培养基最适的植物生长调节剂及其浓度。方法比较了甘蓝型油菜的种子经不同浓度（浓度范围为0.1% ~ 30.0%）NaClO灭菌后的发芽率、健康芽率和菌落率，筛选出最适的种子灭菌NaClO浓度，再在该最适NaClO浓度基础上找出了最适的种子灭菌时间；通过比较不同质量浓度（0.1 ~ 2.0 mg·L⁻¹）的植物生长调节剂萘乙酸（NAA）或吲哚丁酸（IBA）对甘蓝型油菜再生根的促进作用，找出油菜生根培养最适的植物生长调节剂种类及其浓度。结果甘蓝型油菜种子的最佳灭菌NaClO浓度为2.0%或3.0%，在3.0% NaClO下的最适灭菌时间为15 min，种子经该灭菌方法处理后的发芽率和健康芽率分别可达97.4%和85.9%，且菌落发生率最少。该油菜种子灭菌的方法也适用于其他9个植物品种，尤其适合于甘蓝型油菜、大白菜和拟南芥的种子灭菌。在生根培养基中添加0.1 mg·L⁻¹ NAA对甘蓝型油菜再生根的促进作用最强，油菜培养7 d后即有92.5%的累积生根率，再生根从切点处生长，且再生的须根数最多。结论本研究优化了甘蓝型油菜种子的NaClO灭菌方法和生根培养基的植物生长调节剂及其浓度，为高效的油菜组织培养研究奠定了基础。
- 甘蓝型油菜 /
- 种子灭菌 /
- 次氯酸钠 /
- 生根 /
- 萘乙酸 /
- 吲哚丁酸
Abstract: Objective Seed sterilization and rooting culture are important steps in plant tissue culture. At present, there is considerable variation in the concentration of sodium hypochlorite (NaClO) and seed sterilization time of Brassica napus, as well as the type and concentration of hormone in the rooting media. The purpose of this study was to optimize the method of seed sterilization with NaClO and the formula of rooting medium for B. napus regeneration. Method The optimum concentration of NaClO for seed sterilization was screened by comparing the growth status (such as germination rate, healthy shoot rate and rate of colonies) of seeds treated with different concentrations (0.1%–30.0%) of NaClO, and the appropriate sterilization time was optimized based on the growth status of seeds treated with the optimal concentration of NaClO for 10—30 min. Moreover, the optimum formula of rooting media was screened by comparing the rooting regeneration of seedlings in the media containing 0.1–2.0 mg·L⁻¹ naphthylacetic acid (NAA) / indolebutyric acid (IBA). Result The optimum concentration of NaClO for seed sterilization was 2.0% or 3.0%, and the best time for seed sterilization with 3.0% NaClO was 15 min, causing the 97.4% of germination rate and 85.9% of healthy shoot rate with least rate of colonies. Moreover, this method of seed sterilization is applicable to other 9 plants, especially for B. napus, B. pekinensis and Arabidopsis thaliana. The root regenerated best in the rooting medium containing 0.1 mg·L⁻¹ NAA, in which 92.5% of root regenerated from the cutting point on the 7^th day with the most lateral roots. Conclusion This study optimized the method of seed sterilization and the formula of rooting medium, which laid a foundation for efficient plant tissue culture of B. napus.
- Brassica napus /
- seed sterilization /
- sodium hypochlorite /
- rooting /
- NAA /
- IBA

HTML全文

图 1 甘蓝型油菜种子灭菌的NaClO大范围浓度初步筛选

注：A, 发芽率; B, 健康芽率; C, 菌落率。同一图中的不同字母表示处理间具有显著性差异（P ≤ 0.05），数值表示“平均值 ± 标准误”。图2~3同。

Figure 1. Preliminary screening of large-scale concentration of NaClO for seed sterilization in B. napus

Note: A, germination rate; B, healthy shoot rate; C, rate of colonies. Different lowercase letters represent significant difference between treatments (P ≤ 0.05), the value means “mean ± standard error”. The same as Fig.2~3.

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图 2 甘蓝型油菜种子灭菌的NaClO浓度小范围筛选

Figure 2. Screening of small range concentration of NaClO for seed sterilization in B. napus

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图 3 甘蓝型油菜种子在3.0% NaClO下灭菌时间的优化

Figure 3. Optimization of sterilization time of B. napus seeds under 3.0% NaClO

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图 4 种子灭菌方法对其他芸苔属作物种子的灭菌效果

注：A，发芽率；B，健康芽率；C，菌落率；D，9种植物品种的种子；E，9种植物品种的种子灭菌7 d后的苗生长情况。JF，甘蓝B. oleracea ‘京丰一号’；HC，白菜型油菜B. compestris ‘红菜苔’；XZ，小白菜B. campestris ‘夏尊’；YK，甘蓝型油菜B. napus ‘亚科油68’；GY，甘蓝型油菜B. napus ‘高油605’；DF，甘蓝型油菜B. napus ‘德丰油’；ZS，大白菜B. pekinensis ‘F1早熟五号’；SC，莴苣Lactuca sativa ‘意大利全年生菜王’；AT，拟南芥Arabidopsis thaliana。同一小图中的不同字母表示处理间有显著性差异（P ≤ 0.05），数值表示“平均值 ± 标准误”。

Figure 4. The effects of seed sterilization for other Brassica crops with the screened optimal method

Note: A, germination rate; B, healthy shoot rate; B, rate of colonies; D, seeds of 9 plant species; E, seedling growth status of 9 plant species after seed sterilization and sowing for 7 days. JF (B. oleracea ‘Jing Feng 1’), HC (B. compestris ‘Hong Cai Tai’), XZ (B. campestris ‘Xia Zun’), YK (B. napus ‘Ya Ke’), GY (B. napus ‘Gao You’), DF (B. napus ‘De Feng’), ZS (B. pekinensis ‘Zao Shou 5’), SC (Lactuca sativa) and AT (Arabidopsis thaliana). Different lowercase letters represent significant difference between treatments (P ≤ 0.05), the value means “mean ± standard error”.

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图 5 不同质量浓度NAA/IBA对油菜再生根的累积生根率、生根部位、主根长和须根数的影响

注：A、累积生根率；B、生根部位（再生根位置与切点处之间的距离）；C、主根长；D、须根数。CK、培养基内未添加植物植物生长调节剂; 0.1 NAA, 0.1 mg·L⁻¹ NAA; 0.5 NAA, 0.5 mg·L⁻¹ NAA; 1.0 NAA, 1.0 mg·L⁻¹ NAA; 2.0 NAA, 2.0 mg·L⁻¹ NAA; 0.1 IBA, 0.1 mg·L⁻¹ IBA; 0.5 IBA, 0.5 mg·L⁻¹ IBA; 1.0 IBA, 1.0 mg·L⁻¹ IBA; 2.0 IBA, 2.0 mg·L⁻¹ IBA。图中的不同字母表示处理间具有显著性差异（P ≤ 0.05），数值表示“平均值 ± 标准误”。

Figure 5. Effects of different concentrations of NAA / IBA on cumulative rooting rate, rooting position, taproot length and number of lateral roots of regenerative roots of B. napus

Note: A, cumulative rooting rate; B, rooting position (the distance between root regenerated position and cut point); C, number of lateral roots; D, taproot length. CK, media without plant hormone; 0.1 NAA, 0.1 mg·L⁻¹ NAA; 0.5 NAA, 0.5 mg·L⁻¹ NAA; 1.0 NAA, 1 mg·L⁻¹ NAA; 2.0 NAA, 2.0 mg·L⁻¹ NAA; 0.1 IBA, 0.1 mg·L⁻¹ IBA; 0.5 IBA, 0.5 mg·L⁻¹ IBA; 1.0 IBA, 1.0 mg·L⁻¹ IBA; 2.0 IBA, 2.0 mg·L⁻¹ IBA. Different lowercase letters represent significant difference between treatments (P ≤ 0.05), the value means “mean ± standard error”.

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