植物研究 ›› 2024, Vol. 44 ›› Issue (5): 692-701.doi: 10.7525/j.issn.1673-5102.2024.05.006
• 植物生殖生物学 • 上一篇
吴婉阁1, 纪宝玉1,2,3,4,5, 裴莉昕1,3(), 练从龙1, 董诚明1,2, 陈随清1,3
收稿日期:
2024-01-26
出版日期:
2024-09-20
发布日期:
2024-09-24
通讯作者:
裴莉昕
E-mail:xlpxlp@aliyun.com
作者简介:
吴婉阁(1997—),女,硕士研究生,主要从事中药质量评价研究。
基金资助:
Wange WU1, Baoyu JI1,2,3,4,5, Lixin PEI1,3(), Conglong LIAN1, Chengming DONG1,2, Suiqing CHEN1,3
Received:
2024-01-26
Online:
2024-09-20
Published:
2024-09-24
Contact:
Lixin PEI
E-mail:xlpxlp@aliyun.com
摘要:
为建立冬凌草(Isodon rubescens)体细胞胚发生体系,更好地发挥在中医药学中的价值,促进资源稳定和利用,以冬凌草叶片为外植体,脱分化形成胚性愈伤组织,进一步增殖,诱导发育出体细胞胚,结合石蜡切片技术对冬凌草胚性愈伤组织及各阶段体胚进行组织细胞学观察,并探讨激素对植株再生的影响。结果表明:在B5+1.0 mg·L-1 2,4-D培养基中,叶片可脱分化形成淡黄色、颗粒状的胚性愈伤组织;在MS+1.0 mg·L-1 2,4-D+ 0.2 mg·L-1 6-BA培养基中,胚性愈伤组织增殖效果最好,净增殖量最大可达2.81 g;在体胚诱导中,最佳培养基为MS+1.5 mg·L-1 TDZ+0.2 mg·L-1 NAA,诱导率最高为91.33%;在MS+0.5 mg·L-1 6-BA+0.5 mg·L-1 IBA培养基中,表面含体细胞胚的胚性愈伤组织可分化出小植株;在组织细胞学观察中,胚性愈伤组织呈淡黄色或黄白色颗粒状,细胞核大且明显,其内部观察到外起源和内起源2种体胚发生方式,后期可发育为球形胚、心形胚、鱼雷形胚、子叶形胚或成簇状胚结构,内含淀粉粒。该研究成功建立了冬凌草间接体胚发生体系,为优化冬凌草胚性愈伤组织的“质”与“量”奠定基础,也为其分子育种及体胚技术研究提供了理论依据。
中图分类号:
吴婉阁, 纪宝玉, 裴莉昕, 练从龙, 董诚明, 陈随清. 冬凌草体细胞胚诱导及其组织细胞学观察[J]. 植物研究, 2024, 44(5): 692-701.
Wange WU, Baoyu JI, Lixin PEI, Conglong LIAN, Chengming DONG, Suiqing CHEN. Somatic Embryo Induction and Histocytological Observation of Isodon rubescens[J]. Bulletin of Botanical Research, 2024, 44(5): 692-701.
表1
不同基本培养基对冬凌草愈伤组织诱导的影响
基本培养基类型 Basic medium type | 外植体数量 Number of explants | 启动时间 Start-up time/d | 生长状态 Growth situation |
---|---|---|---|
MS | 25 | 3~4 | 白色,质地偏硬,表面干燥 White,hard texture,dry surface |
B5 | 25 | 10~11 | 淡黄色,质地疏松,颗粒状 Light yellow,loose texture,granular |
1/2MS | 25 | 5~6 | 白色,黄褐色,部分水渍状,表面产生绒毛状根 White,yellowish brown,partially water-stained,with fluff-like roots on the surface |
WPM | 25 | 6~7 | 黄褐色,质地偏硬,易褐化 Yellowish brown,hard texture,easy browning |
表3
不同激素浓度配比对胚性愈伤组织增殖的影响
处理 | 基本培养基 Basic medium | 生长调节剂浓度 Growth regulator concentration/(mg·L-1) | 接种数量/块 Inoculation number | 增殖倍数 Proliferation times | ||
---|---|---|---|---|---|---|
2,4-D | 6-BA | NAA | ||||
1 | B5 | 1.0 | 0 | 0 | 15 | 2.63±0.17e |
2 | 1.0 | 0.2 | 0 | 15 | 8.15±0.21a | |
3 | 2.0 | 0.2 | 0 | 15 | 0.74±0.09f | |
4 | 0.2 | 1.0 | 0 | 15 | 3.47±0.22d | |
5 | 2.0 | 0.5 | 0 | 15 | 0.76±0.08f | |
6 | 0 | 1.0 | 0.2 | 15 | 6.02±0.16c | |
7 | 0 | 0.5 | 0.1 | 15 | 6.60±0.31b |
表4
体细胞胚的诱导
处理 Treatments | 接种数量/块 Inoculation number | TDZ质量浓度 Mass concentration of TDZ/ (mg·L-1) | NAA质量浓度 Mass concentration of NAA/ (mg·L-1) | 体胚诱导率 Somatic embryo induction rate/% |
---|---|---|---|---|
1 | 30 | 1.0 | 0 | 40.00±10.00de |
2 | 30 | 1.5 | 0 | 63.33±5.77bc |
3 | 30 | 2.0 | 0 | 43.33±15.28de |
4 | 30 | 2.5 | 0 | 33.33±5.77ef |
5 | 30 | 3.0 | 0 | 20.00±10.00f |
6 | 30 | 1.5 | 0.5 | 73.33±3.51b |
7 | 30 | 1.5 | 0.2 | 91.33±5.13a |
8 | 30 | 2.0 | 0.5 | 53.33±3.51cd |
9 | 30 | 2.0 | 0.2 | 60.00±3.00bc |
表5
体细胞胚的植株再生
处理 Treatments | 激素质量浓度 Hormone mass concentration/(mg·L-1) | 接种数量 Inoculation number | 成苗率 Seedling percent/% | 30 d生长状态 30 d growth state | ||
---|---|---|---|---|---|---|
6-BA | IBA | NAA | ||||
1 | 0.5 | 0.5 | 0.0 | 15 | 26.67 | 表面体胚进一步发育成熟,少部分形成小植株 The embryo of the surface body further developed and matured, and a few formed small plants |
2 | 0.5 | 0.0 | 0.1 | 15 | 0 | 表面形成芽点,少部分分化为丛生芽 The surface formed bud points,and a few differentiated into clumped buds |
3 | 0.5 | 0.0 | 0.2 | 15 | 0 | 表面形成芽点,全部有丛生芽出现 The surface formed bud points,all have clumped buds |
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