林业科学2011，Vol.47Issue(2)：154-160,7.
NaCl和Na2CO3胁迫对四翅滨藜种子萌发及保护酶活性的影响
Effects of Activities of Protective Enzymes and Seed Germination in Atriplex canescens under NaCl and Na2 CO3 Stress
摘要
Abstract
The seed germination rate, germination index, germination value, vigor index, growth of radical and hypocotyls and activities of protective enzymes of Atriplex canescens were investigated under NaCl and Na2CO3 stresses.The results showed that: 1 ) While low NaC1 concentration (0.05 mol· L-1 ) promoted the germination rate, germination index and germination value of Atriplex canescens seeds, high NaCl, as well as Na2 CO3, inhibited these parameters, and the inhibition was aggravated with the increasing salinity. Under Na2CO3 stress, seeds were not able to germinate at 0.25 mol·L-1 Na + concentration. The osmotic stresses were the dominant factor to inhibit those three parameters in seed germination period. 2) The length and growth rate of hypocotyls and radical, and vigor index under NaCl treatment were 1 -5 times higher than Na2CO3 treatment, which suggested that high pH value was the main factor to affect the seedling growth. 3) At low concentrations of NaCl treatment (NaCl≤0. 1 mol· L-1), SOD and POD in Atriplex eanescens seeds played the principal role, while at high concentrations of NaCl treatment ( NaCl ＞0. 1 mol· L-1 ), the POD and CAT were the principal factor. The changes of protective enzymes of the seeds in low concentration Na2CO3 stress were to the same as that under low concentration NaCl stress. POD maintained a high activity only in high concentration of Na2CO3 treatment,however, POD activity started to decline when the Na + concentration was higher than 0. 2 mol·L-1. For all above factors the injuries imposed by Na2CO3 stress were greater than by NaCl stress.关键词
四翅滨藜/萌发/生长/保护酶Key words
Atriplex canescens/ germination /growth / protective enzymes分类
农业科技引用本文复制引用
王娟娟,张文辉..NaCl和Na2CO3胁迫对四翅滨藜种子萌发及保护酶活性的影响[J].林业科学,2011,47(2):154-160,7.基金项目
国家十一五科技支撑课题(2006BAD09803) （2006BAD09803）
山东省黄河三角洲生态环境重点实验室开放基金 （）
天津师范大学服务天津市和滨海新区专项研究计划项目. （）
