GA3处理对耐寒燕麦品种种子萌发的影响

Effects of GA3 on the seeds germination of five oatvarieties in the alpine region

摘要:

为探究外源激素赤霉素(GA₃)对燕麦种子萌发及活力的影响,选用5个高寒燕麦品种,分别采用不同浓度(0、50、150、200 mg/L)GA₃浸种,比较分析了其发芽率、发芽势、发芽指数、活力指数、胚根长、苗高等萌发相关指标。结果表明:随着GA₃浓度的升高,供试种子与萌发相关的指标均呈现出先升高后降低的趋势。其中,低浓度50 mg/L和中等浓度150 mg/L对种子萌发有促进作用,而高浓度200 mg/L则表现出一定的抑制,50 mg/L处理对供试燕麦种子萌发促进作用最好。同时,GA₃处理对燕麦种子幼苗苗高的促进作用强于根。除林纳品种外,不同浓度GA₃处理均能显著提高其幼苗的高度。不同燕麦品种的萌发情况对GA₃处理也表现出了显著的差异,其中促进作用由强到弱顺序为青海444＞青燕1号＞青引3号、青海甜燕麦＞林纳。

Abstract:

In order to reveal the effects of gibberellin acid GA₃ on the oats seed germination and vigor,the five oat varieties soaked with GA₃ at different at different concentrations (0,50,150,200 mg/L),and the germination rate,germination potential,vigor index,radicle length and seedling height were compared and analyzed.The results showed that the seed germination index showed a trend of first increasing and then decreasing with the increase of the GA₃ concentration.The medium concentration (150 mg/L) and low concentration (50 mg/L) of GA₃ could promote the germination,and the high concentration (200 mg/L) had some inhibit function on the germination.50 mg/L GA₃ was the optimal concentration for the oat seed germination.The promoting effects of GA₃ on the seedling height were more significant than that on the root length.Except for Linna varieties,different concentrations of GA₃ treatment could significantly improve the height of the seedlings.In addition,the germination of different oat varieties also showed significant differences under GA₃ treatment.The promoting effects of GA₃ on the seed germination decreased as the following order: Qinghai444＞Qingyan NO.1 ＞Qingyin NO.3 and Qinghai sweet oat ＞Linna.