外源NO供体SNP浸种对盐胁迫下黄金树幼苗生长的影响

Effect of Soaking Seeds in Exogenous NO Donor SNP on Catalpa speciosa Seedling under Salt Stress

用不同浓度NO供体硝普钠(SNP)浸种黄金树种子得到其幼苗,采用NaCl琼脂法研究不同浓度盐胁迫对幼苗生长的影响。结果表明:50μmol/L SNP浸种可以明显缓解100 mmol/L NaCl胁迫对黄金树苗高生长造成的抑制作用,2 000μmol/L SNP浸种可以明显缓解100 mmol/L NaCl胁迫对黄金树发根数造成的抑制作用;黄金树种子在外源NO供体SNP浸种后萌发得到的幼苗耐盐性较优,可为黄金树耐盐种的选择提供参考。

With different concentrations of NO donor sodium nitroprusside（SNP） used in soaking the seeds of catalpa speciosa,the effect of seedling growth under salt stress has been studied.The results show that： 50 μmol / L SNP soaking seeds can significantly ease the 100 mmol / L NaCl stress caused height growth of seedlings of catalpa speciosa inhibition,2 000 μmol / L SNP soaking seeds can significantly ease the stress of 100 mmol / L NaCl to tree rooting for catalpa speciosa number caused inhibition;the catalpa speciosa seedling salt tolerance get better after soaking in NO donor SNP.