CUI Xing-guo.Effect of Different Concentration of NaHCO3 Stress on Seed Germination of Pharbitis purpurea(L.)Voigt[J].Northern Horticulture,2014,38(11):74-76.
不同浓度碳酸氢钠胁迫对圆叶牵牛种子发芽的影响
- Title:
- Effect of Different Concentration of NaHCO3 Stress on Seed Germination of Pharbitis purpurea(L.)Voigt
- 文章编号:
- 1001-0009(2014)11-0074-03
- 关键词:
- 圆叶牵牛; 种子萌发; 碳酸氢钠（NaHCO3）; 碱胁迫; 萌发抑制
- Keywords:
- Pharbitis purpurea (L.) Voigt; seed germination; sodium bicarbonate（NaHCO3）; alkaline stress; germination restrain
- 分类号:
- Q 949. 95
- 文献标志码:
- B
- 摘要:
- 以圆叶牵牛种子为试材，研究了不同浓度的NaHCO3（0、2.5、5.0、7.5、10.0、12.5、15.0、20.0 mmol/L）胁迫处理对圆叶牵牛种子萌发以及胁迫解除后发芽的影响。结果表明：圆叶牵牛种子在蒸馏水中萌发最好，不同浓度NaHCO3对种子的萌发均具有抑制作用。低浓度（2.5~15.0 mmol/L）范围内，种子的发芽率、发芽指数、发芽势均随溶液浓度的升高呈下降趋势；高浓度（20.0 mmol/L）下，种子发芽率为0%；解除胁迫后，2.5、5.0、7.5 mmol/L NaHCO3胁迫处理的种子萌发恢复率分别为7.9%、13.45%和16.9%，说明碱胁迫解除后圆叶牵牛种子的萌发可以部分恢复，萌发恢复率随着原碱浓度的增加呈上升趋势；10.0~20.0 mmol/L NaHCO3胁迫处理则永久地丧失萌发能力，萌发恢复率为0%。
- Abstract:
- Taking Pharbitis purpurea (L.) Voigt as materials,the effect of different concentration of NaHCO3 （0,2.5,5.0,7.5,10.0,12.5,15.0,20.0 mmol/L）stress on seed germination and its recovery after release from stress were studied.The results showed that disilled water was the best for Pharbitis purpurea (L.) Voigt seed germination.The seed germination rates,germination indexes and germination power decreased when NaHCO3 concentration was 2.5~15.0 mmol/L and the germination rate was 0% at 20 mmol/L.After release from alkaline stress,2.5,5.0,7.5 mmol/L NaHCO3 concentrations seed germination rate for the 7.9%,13.45%,16.9%,its also showed that seed germination could part recovery after release from stress.Germination recovery rate rose with the increasing of pre-treatment alkaline concentrations.But under 10~20 mmol/L,the seed permanent loss germination capability,the germination recovery rate was 0%.
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备注/Memo
作者简介：崔兴国（1963-），女，本科，副教授，现主要从事植物抗性生理的教学与科研工作。E-mail：cuixg2005@126.com.
基金项目：河北省科技支撑计划资助项目（10220129）。
收稿日期：2013-11-13