水分胁迫对红小豆和绿豆发芽的影响  

Effect of Water Stress on Germination of Adzuki Bean and Mung Bean

作　　者：刘世鹏[1] 叶飞[1] 曹娟云[1] 陈宗礼[1] 

机构地区：[1]延安大学生命科学学院陕西省区域生物资源保育与利用工程技术研究中心,陕西延安716000

出　　处：《北方园艺》2011年第15期38-41,共4页Northern Horticulture

基　　金：陕西省自然科学基金资助项目(S2009JC970);延安市自然科学基础研究资助项目(2008KN-01)

摘　　要：采用配置不同浓度的聚乙二醇(PEG-6000)溶液来模拟土壤自然水势,对红小豆和绿豆种子萌发进行人工水分胁迫处理。结果表明:随着胁迫程度的加剧,红小豆和绿豆的发芽率、发芽势、发芽指数、活力指数均呈下降趋势;胁迫浓度达20%时红小豆种子不能萌发,表明红小豆种子的萌发的临界水分胁迫值小于20%,而绿豆种子在25%的胁迫溶液中没有发芽,表明绿豆种子萌发的临界水分胁迫值小于25%;发芽后胚轴和胚根的生长亦受到水分胁迫的影响,胚轴/胚根的比值随水分胁迫强度的加强而减小,表明红小豆和绿豆种子萌发后对水分胁迫具有较强的适应性。The treatment of water stress to adzuki bean and mung bean on seeds was made by the different concentrations of polyethylene glycol（PEG-6000）.The results showed that with the increasing of PEG concentrations,the germination rate,germination percentage,germination index and seed vigor index were all decreased gradually.The adzuki bean seeds treated with 20% PEG could not germinate at all throughout the experiment period,suggesting that 20% PEG was the threshold for the germination of adzuki bean seeds.The mung bean seeds treated with 25% PEG could not germinate at all throughout the experiment period,suggesting that 25% PEG was the threshold for the germination of mung bean seeds.After germinates the lengths of radicle and hypocotyls were shorter,illustrating their growth be more sensitive to PEG-simulated drought stress,while the lengths of radicle/hypocotyls ratio was decreased with increasing PEG concentration,indicating that adzuki bean and mung bean seeds had a stronger resistance to drought stress after germination.

关 键 词：水分胁迫 发芽率 发芽势 发芽指数 活力指数 

分 类 号：S52[农业科学—作物学]