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中国农学通报

中国农学通报 ›› 2003, Vol. 19 ›› Issue (6): 168-168.

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不同盐分胁迫对盐地碱蓬种子萌发的效应

段德玉 ?? 刘小京 冯凤莲 李存桢   

  • 出版日期:2003-12-25 发布日期:2003-12-25

Effect of salinities on seed germination of halophyte Suaeda Salsa

Deyu Duan Xiaojing Liu Fenglian Feng Cunzhen Li   

  • Online:2003-12-25 Published:2003-12-25

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摘要： 用不同浓度的单盐NaCl和混合盐溶液（2.9g/L，5.9g/L，11.7g/L，17.6g/L，23.4g/L，35.1g/L）处理盐生植物盐地碱蓬种子，以研究不同盐分对盐生植物种子萌发的影响。结果表明，随着盐浓度的增加，种子的萌发率降低，萌发率与处理盐浓度呈显著的负相关关系，NaCl和混合盐溶液中相关系数分别为0.96和0.94；盐地碱蓬种子在蒸馏水中萌发率最高，并且单盐NaCl对种子萌发的抑制作用大于混合盐溶液；未发芽的种子转至蒸馏水中后最终萌发率都达到了对照种子的85%以上，表明盐胁迫下种子仍保持较高的萌发潜力；种子萌发恢复率与处理盐浓度之间呈正相关关系。

Abstract: The study was carried out to determine the germination ability of the seeds of halophyte Suaeda salsa, which were treated with various concentration of sodium chloride and natural mixed salt solutions, salinity ranging from 2.93 g/L to 35.1 g/L. For each treatment, rate of germination and of germination recovery were compared. Rate of seed germination decreased as salinity increased and the optimal germination was obtained in distilled water. The natural mixed salinity was less inhibitory than the others to seed germination. After the non-germinated seeds from all the salinity treatments were transferred to distilled water, the finial rate of germination was more than 85% of that of original distilled water control. The results showed that salinity was a reversible osmotic inhibition to seed germination and has no much effect on seed germination ability. The rate of germination recovery increased with an increase of the salt concentration.