摘要
为了探明不同钠盐胁迫中华羊茅种子的萌发特性,采用实验室发芽试验研究了不同中性盐(NaCl)和碱性盐(NaHCO3和Na2CO3)胁迫对中华羊茅种子发芽率、胚芽长、胚根长等的影响。结果表明:1)3种钠盐胁迫下,中华羊茅种子的发芽率、发芽势、发芽指数和活力指数均随着盐浓度的升高而降低。2)当NaCl浓度≤200mmol/L、NaHCO3≤100mmol/L、Na2CO3≤50mmol/L时,中华羊茅种子可正常萌发;当NaCl浓度为300mmol/L、NaHCO3为150mmol/L、Na2CO3为100mmol/L时,种子萌发明显受到抑制;当NaCl浓度为500mmol/L、NaHCO3为300mmol/L、Na2CO3为150mmol/L时,种子不发芽,并且随着3种盐浓度的继续增高,胚芽生长迅速下降,而胚根的生长也呈下降趋势;在NaCl浓度为50mmol/L时,种子的胚根生长较对照略高。
The influence of NaC1 stress, NaHCOa stress and Na2C（）3 stress on seed germination rate, plumule length and radical length of F. sinensis was studied through a germination test in the laboratory to explore the seed germination characteristics of F. sinensis under different sodium salt stress. Results： 1） The F. sinensis seeds could germinate naturally when NaC1 concentration- 200 mmol/L, NaHCO： concentration 100 mmol/L and Na2 CO3 concentration 50 mmol/L. The seed germination was significantly inhibited when NaC1 concentration= 300 mmol/L, NaHCOa concentration 150 mmol/L and Na2CO3 concentration= 100 mmol/L. And the seeds NaHCO3 concentration = 300 did not germinate when NaC concentration= 500 and Na2 CO3 concentration = 150 mmol/L. The plumule length and radical length decreased rapidly with the increasing of sodium salt concentration. The radical growth was slightly higher than the control when NaC1 concentration was 50 mmol/L.
出处
《贵州农业科学》
CAS
北大核心
2013年第3期108-111,共4页
Guizhou Agricultural Sciences
基金
国家自然科学基金项目(30900173)
关键词
中华羊茅
钠盐胁迫
发芽率
发芽势
根芽长
Festuca sinensis
sodium salt stress
germination rate
germinating potential
radical budlength
