摘要
试验以1组4个耐盐性不同的棉花品种的种子为材料,采用滤纸卷直立发芽法,以种子发芽率、胚根长为耐盐性指标,探讨判断新品种百棉1号、百棉2号耐盐性的可能性。结果表明:耐盐品种表现在不同浓度NaCl处理下均具有较高的发芽率,而敏盐品种在不同浓度NaCl胁迫下有较大的差异;在低于0.8%的NaCl浓度时,棉花种子发芽受到的胁迫耐盐与敏盐品种无显著性差异。1.0%、1.2%NaCl浓度对不同棉花材料的种子发芽率、胚根的长度影响有显著性差异,而且耐盐品种与敏盐品种表现不同的特征。耐盐品种在1.0%、1.2%的NaCl处理下种子发芽率、胚根的长度都表现较高,为耐盐;在NaCl1.0%时表现高发芽率,而1.2%时下降至敏盐品种水平,为抗旱品种。依此判定百棉1号、百棉2号为敏盐品种,有待进一步改良。
Cotton seeds of four different varieties were used as materials , different salt tolerance and germination experiment was done by using filter paper roll upright method. The research was designed to determine the possibility of cotton salt tolerance ability by salt tolerance index include seed germination and radicle length. The results showed： salt tolerant varieties had higher germination rates at different NaCl concentrations, but Salt-sensitive species were quite different at different concentrations of NaCl stress. When the NaCl concentration was smaller than 0.8%, cotton seed germination showed no significant differences between salt-sensitive varieties and salt tolerant varieties, there was a significant different impact in the rate of seed germination and radicle length of different cotton materials treated with 1.0% , 1.2% NaCl concentration, and different variation were found between salt-sensitive varieties and salt tolerant varieties. Salt-tolerant varieties showed higher seed germination and longer radicle length at 1.0% , 1.2% NaCl concentration. Drought-resistant varieties showed higher seed germination at 1.0% NaCl concentration and had same performance with salt-sensitive varieties at 1.2% NaCl concentration. According to the measurement data, Baimian 1 and Baimian 2 belonged to salt-sensitive varieties.
出处
《种子》
CSCD
北大核心
2014年第5期13-15,19,共4页
Seed
基金
国家农业科技成果转化资金项目(编号:2010 GB 2 D000278)
关键词
氯化钠
种子萌发
胁迫
陆地棉
sodium chloride
seed germination
stress
upland cotton
