ZHAO Liping,YAO Zhigang,XIE Wenjun,et al.Seed Germination Characteristics of Zoysia macrostachya Franchet.Sav.and the Response to Salt and Drought Stress[J].Northern Horticulture,2017,41(19):98-103.[doi:10.11937/bfyy.20170482]
盐生植物大穗结缕草种子萌发特性及其对盐旱胁迫的响应
- Title:
- Seed Germination Characteristics of Zoysia macrostachya Franchet.Sav.and the Response to Salt and Drought Stress
- Keywords:
- Zoysia macrostachya Franchet.Sav.; seed germination characteristics; salt and drought stress
- 文献标志码:
- A
- 摘要:
- 以大穗结缕草为试材，研究了光照/黑暗、温度、盐胁迫和干旱胁迫对大穗结缕草种子萌发特性的影响。结果表明：种子萌发为非需光种子，种子萌发最适温度范围为25～30 ℃；当NaCl浓度为100 mmol?L-1时，大穗结缕草种子最终萌发率与对照无显著差异，但种子发芽势和活力指数与对照有明显差异。当浓度为150~200 mmol?L-1时，显著抑制大穗结缕草种子的萌发。种子耐盐临界浓度和极限浓度分别为144.12、244.12 mmol?L-1；随着干旱胁迫程度的增加，萌发进程所用时间增长，最终萌发率也显著下降，50 g?L-1 PEG模拟干旱胁迫对种子萌发无显著影响，种子的耐旱临界浓度和极限浓度分别为90.95、155.05 g?L-1。综上所述，大穗结缕草种子在萌发期表现出一定的抗盐性和抗旱性。
- Abstract:
- The effects of different light/dark,temperature,salt stress and drought stress on seed germination characteristics of Zoysia macrostachya Franchet.Sav.were studied in this research.The results showed that the germination of Zoysia macrostachya Franchet.Sav.had no strict requirement for light and dark and the seed germination temperature ranged between 25 ℃ and 30 ℃.There was no significant effect on seed germination when the NaCl concentration was of 100 mmol?L-1.It was significantly inhibited the seed germination when the NaCl concentration was of 150-200 mmol?L-1.The critical and limit concentration of salt tolerant（NaCl） in Zoysia macrostachya Franchet.Sav.seed were 144.12 mmol?L-1 and 244.12 mmol?L-1.With the degree of drought stress increasing,the time spent to complete germination process and the final germination rate decreased significantly.50 g?L-1 PEG stress had no significant effect on seed germination rate；while under condition of 150-200 g?L-1 PEG stress,the final seed germination rate had a significant downward trend.The critical and limit concentration of drought tolerant（PEG）were 90.95 g?L-1 and 155.05 g?L-1.Seeds of Zoysia macrostachya Franchet.Sav.showed a great salt tolerance and drought tolerance at germination stage.
参考文献/References:
[1]董厚德,宫莉君.中国结缕草生态学及其资源开发与应用[M].北京:中国林业出版社,2001.
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[2]胡化广,张振铭.大穗结缕草对盐胁迫响应及临界盐浓度的研究[J].北方园艺,2010,34(03):0.[doi:10.11937/bfyy.201003058]
HU Hua-guang,ZHANG Zhen-ming.Study on Responses to Salt Stress and Critical Salt Concentration of Zoysia macrostachya[J].Northern Horticulture,2010,34(19):0.[doi:10.11937/bfyy.201003058]
备注/Memo
第一作者简介：赵丽萍（1979-），女，山东广饶人，本科，副教授，现主要从事植物资源与抗逆生理研究工作。E-mail：zhaoliping_bz@163.com.