WU Faming,LIU Fusong,REN Zhenli,et al.Effects of Polyethylene Glycol Drought Stress on Germination of Three Kinds of Codonopsis radix[J].Northern Horticulture,2018,42(08):143-148.[doi:10.11937/bfyy.20174252]
聚乙二醇干旱胁迫对三种党参种子萌发的影响
- Title:
- Effects of Polyethylene Glycol Drought Stress on Germination of Three Kinds of Codonopsis radix
- 关键词:
- 党参; 干旱胁迫; 种子萌发; 浓度阈值; 聚乙二醇（PEG-6000）
- Keywords:
- Codonopsis radix; drought stress; seed germination; concentration threshold; polyethylene glycol (PEG-6000)
- 文献标志码:
- A
- 摘要:
- 以党参、素花党参和川党参种子为试材，采用不同浓度聚乙二醇（PEG-6000）溶液（0％、5％、10%、15%、20%）模拟干旱胁迫条件，研究了干旱胁迫对党参种子萌发的影响，考察不同品种党参种子萌发过程对干旱胁迫的响应。结果表明：随PEG-6000浓度的升高，党参、川党参和素花党参种子的发芽率、发芽势和发芽指数均受到不同程度的抑制。其中，素花党参、川党参和党参种子萌发受到抑制的最低浓度阈值分别为5％、10％和15％。可知党参抗旱性最好、川党参次之、素花党参最弱。
- Abstract:
- Seeds of Codonopsis pilosula,Codonopsis pilosula and Codonopsis tangshen were used as test materials,the different concentrations of polyethylene glycol (PEG-6000) were used to simulate degrees of drought stress.The effects of polyethylene glycol (PEG-6000) on seed germination of Codonopsis radix were studied and the response of Codonopsis radix of different varieties to drought stress during germination were inspected.The results showed that the seed germination rate,the germination potential and the germination index were inhibited to different degrees with the increase of polyethylene glycol (PEG-6000) concentration.The lowest concentration threshold of the germination inhibition of seeds of Codonopsis pilosula,Codonopsis tangshen,Codonopsis pilosula was 5%,10% and 15%,respectively.It was suggested that the Codonopsis pilosula had the best drought resistance,Codonopsis tangshen had the middle drought resistance,and the Codonopsis pilosula had the worst drought resistance. Keywords:Codonopsis radix;drought stress;seed germination;concentration threshold;polyethylene glycol (PEG-6000)
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备注/Memo
第一作者简介：吴发明（1983-），男，甘肃靖远人，博士，副教授，研究方向为生药品种质量及资源。E-mail:zunyiwufaming@163.com.基金项目：国家自然科学基金资助项目（81760679）；贵州省教育厅青年人才成长资助项目（黔教合KY字[2017]196）；遵义医学院博士科研启动资金资助项目（F-805）；遵义医学院大创资助项目（遵医201751087）。收稿日期：2018-02-01