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 oat varieties in the alpine region

作　　者：刘孝欣 陈仕勇[1] 李世丹[1] 柏晓玲[1] 周青平 LIU Xiao-xin;CHEN Shi-yong;LI Shi-dan;BAI Xiao-ling;ZHOU Qingping(College of Life Science and Technology,Southoest Minzu Unicersity,Chengdu 610041;Institute of Qinghai-Tibet Plateau,Southwest Minzu University,Chengdu 610041)

机构地区：[1]西南民族大学生命科学与技术学院,四川成都610041 [2]西南民族大学青藏高原研究院,四川成都610041

出　　处：《草原与草坪》2020年第4期103-106,113,共5页Grassland and Turf

基　　金：国家重点研发计划课题(2017YFC0504806);西南民族大学研究生创新型科研项目(CX2 019SZ140);国家牧草产业技术体系(CARS-34)。

摘　　要：为探究外源激素赤霉素(GA_3)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)GA_3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GA_3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,GA_3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GA_3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GA_3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。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.

关 键 词：燕麦 种子萌发 赤霉素 活力指数 

分 类 号：S512.6[农业科学—作物学]