不同浓度盐胁迫对转基因饲用甜菜种子萌发及幼苗生长的影响

Effect of Salt Stress on Seed Germination and Seedling Growth of Genetically Modified Fodder Sugar Beet

通过不同浓度NaCl溶液处理转基因饲用甜菜种子及其幼苗试验，研究了盐胁迫下种子萌发、幼苗生长及胁迫解除后种子的效应，为盐土农业生产提供理论依据。结果表明，转基因饲用甜菜种子萌发的适宜Nacl浓度为50。150mmol/L，其中100mmoL／LNaCl胁迫下，种子发芽率最高，与对照相比高6．78％。随着盐胁迫浓度的升高，种子萌发延迟，萌发率也呈不同程度的降低。盐胁迫解除后，种子萌芽迅速，萌芽率提高，整齐度增加。转基因饲用甜菜幼苗在不同NaCl浓度胁迫下表现出的反应不同，高盐胁迫对抑制幼根生长影响较大。

The seeds of genetically modified fodder sugar beet were treated with different concentration under sodium chloride conditions. The germination percentage, seedling growth and the response of the seeds after removing salt stress were studied in order to provide theoretical basis for agricultural production. The results showed that 50 - 150 mmol/L NaCl had no significant effects on the seed germination. While under 100 mmol/L NaC1 conditions, the germination percentage is highest in all salt stress treatments, which increased 6.78 % than the contrast treatment. With the increasing of salt concentration, the germination percentage had different decrease. But after removing the salt stress, the seeds could germinated rapidly and the germination percentage were also improved. At the same time, the result also showed that the scion and radicle had different response to the sodium chloride concentration, and the higher salt concentrations had more influence on the radicle.