广西植物2011，Vol.31Issue(6)：801-805,5.DOI:10.3969/j.issn.1000-3142.2011.06.017
外源ALA、SNP和Spd对NaCl胁迫下桔梗种子萌发特性的影响
Effect of exogenous ALA、SNP and Spd on seed germination characteristics of Platycodon grandiflorum under NaCl stress
摘要
Abstract
In order to get the method to improve the salt resistance of seeds and seedlings for Platycodon grandiflorum under NaCl stress .the different concentration of 5-aminolevulinic acid(ALA), sodium nitroprusside(SNP) ,sper-midine (Spd) effect on P. Grandi florum seed germination,seed germination rate,seed germination index,and the average length of root were studied under different concentrations of NaCl stress. The results showed that the seed germination was inhibited under 75 mmol·L-1 concentrations of NaCl stress,but with different concentrations of ALA, SNP and Spd on the P. Grandiflorum seeds,all germination index were significantly higher. Spd(2. 5 mmol·L-1), ALA (5 mg·L-1)and SNP(0.1 mmol·L-1) could obviously alleviate the damage of salt stress to the seeds of P. Grandiflorum. Spd(2. 5 mmol·L-1) significantly increased all indexes. The germination vigor was 40. 3% ,the germination rate was 49. 5% ,the germination index was 9. 28 and the average length of root was 2. 80 cm. So we con-clude that, ALA,SNP and Spd with appropriate concentration could significantly alleviate the damages to the P. Gran-diflorum seeds under NaCl stress and promote the salt resistance of the seeds,the best of them was Spd,the second was SNP,furthermore was the ALA.关键词
桔梗/ALA/SNP/Spd/盐胁迫/种子萌发/萌发特性Key words
Platycodon grandiflorum/ALA/SNP) Spd/NaCl stress/seed germination/germination characteristics分类
农业科技引用本文复制引用
杜丹丹,何平,张春平,喻泽莉..外源ALA、SNP和Spd对NaCl胁迫下桔梗种子萌发特性的影响[J].广西植物,2011,31(6):801-805,5.基金项目
国家自然科学基金(30070080) （30070080）
