不同盐分胁迫对盐地碱蓬种子萌发的效应  

Effect of Salinities on Seed Germination of Halophyte Suaeda Salsa

作　　者：段德玉[1] 刘小京[1] 冯凤莲[2] 李存桢[1] 

机构地区：[1]中国科学院石家庄农业现代化研究所 [2]河北医科大学,石家庄050017

出　　处：《中国农学通报》2003年第6期168-172,共5页Chinese Agricultural Science Bulletin

基　　金：中国科学院石家庄农业现代化研究所创新项目;中国科学院知识创新项目 (KZCX -SW - 31 7- 0 2 )部分内容

摘　　要：用不同浓度的单盐NaCl和混合盐溶液 (2 9g L ,5 9g L ,1 1 7g L ,1 7 6g L,2 3 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 ;The study was carried o ut to determine the germination ability of the seeds of halophyte Suae da 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 we re compared Rate of seed germination decreased as salinity increased and the opti mal germination was obtained in distilled water The natural mixed salinity was l ess inhibitory than the others to seed germination After the non-germinated se e ds from all the salinity treatments were transferred to distilled water, the finial rate of germination was more than 85% of that of original distilled w ater control The results showed that salinity was a reversible osmotic inhibit ion to seed germination and has no much effect on seed germination ability The r ate of germination recovery increased with an increase of the salt concentration

关 键 词：盐分胁迫 盐碱地 碱蓬 种子萌发 萌发率 萌发恢复率 

分 类 号：S156.44[农业科学—土壤学]