外源ABA对冬油菜种子萌发及生理指标的影响

Effects of Exogenous ABA on Seed Germination and Physiological Indexes of Winter Rape

用不同浓度的脱落酸(ABA)溶液浸泡白菜型冬油菜陇油6号种子后进行发芽试验,统计种子萌发情况,分析幼苗相关生理指标的变化。结果表明,较低浓度(10~70 mg/L)的脱落酸溶液处理有利于种子的萌发,有效提高种子发芽率、发芽势及发芽指数,提高丙二醛和脯氨酸含量,增强幼苗中过氧化物酶(POD)活性,超氧化物歧化酶(SOD)、过氧化氢酶(CAT),减缓叶绿素含量的下降,其中以30 mg/L脱落酸效果最佳。较高浓度的脱落酸溶液抑制冬油菜种子的萌发。

With different concentrations of abscisic acid（ABA）solution soaking Longyou 6 seed germination test,the statistical analysis of the seed germination rate,changes of related physiological indexes of seedlings. The result shows that abscisic acid solution with lower concentration（10~70 mg/L）treatment for germination of winter turnip rape seed,effectively improve the seed germination rate,germination potential and germination index increased,MDA and proline content,peroxidase in seedlings（POD） activity,superoxide dismutase（SOD）,catalase（CAT）,slow decline of chlorophyll content,among which the 30 mg/L effect of abscisic acid is the best;abscisic acid solution of higher concentration inhibited the seed germination of winter rape.