摘要
试验筛选出脱落酸(ABA)用于提高甜菜幼苗抗冻力的有效浓度为5×10^(-6)～5×10^(-5)mol/L,最佳浓度为10^(-5)mol/L;处理有效作用期为24～96小时,36～72小时效果最佳;正常的光照和生长温度是提高ABA有效作用的必要条件,ABA用于较抗冻的品种比冷敏感品种效果更好;试验表明,调节脯氨酸代谢和糖代谢是ABA提高甜菜幼苗抗冻性的实质。
The efficient concentration of ABA increasing the freeze of sugarbeet seedling was 5 × 10-6-5 ×10-5 mol/L and optimum concentration was 10-8 mol/L. The normal light and effective regular growing, temperature were necessary factors for increasing effective action of ABA Treating efficient time that ABA incr ase the freeze resistance of sugarbeet seedling was at24-96hr. and the best lime vas at 36-72 hr., ABA used to the freeze resistance varieties has batter effect than the cold sensitive ones, the test indicated that the regulating metabolisms of proline and sugar were the central poing. of ABA. increasing freeze resistance of sugarbeet seedling.
关键词
甜菜
幼苗
抗冻性
脱落酸
Sugarbeet seedling, Freeze resistance, Abscisic acid
