干旱胁迫对3个品种红花种子萌发的影响  

The Effects of PEG Stress on Germination Characteristics of 3 Carthamus tinctorius L.

作　　者：李威[1] 张曦[2] 谭勇[2,3] 周玲玉[2] 王恒[2] 陈文[2,3] 

机构地区：[1]石河子大学生命科学学院,新疆石河子832000 [2]石河子大学药学院,新疆石河子832002 [3]新疆特种植物药资源省部共建教育部重点实验室,新疆石河子832002

出　　处：《中国农学通报》2013年第34期207-211,共5页Chinese Agricultural Science Bulletin

基　　金：国家科技支撑计划项目"西北区域红花;沙棘等大宗中药材质量标准提高及其综合利用研究"(2011DAI05B05);国家自然科学基金项目"新疆红花种质资源评价及药材质量形成的生态机制研究"(81260611);石河子大学育种专项"重离子束辐照诱变选育红花新品种(系)研究"(gxjs2012-yz05)

摘　　要：为了探讨干旱梯度对不同红花品种发芽的影响,以3个红花品种‘吉红1号’、‘新红4号’和‘裕民无刺’种子为试材,采用不同渗透势的聚乙二醇(PEG 6000)模拟干旱胁迫处理,观测红花种子发芽特征。结果表明,不同的干旱梯度对红花种子发芽率有影响。当水势≤-0.4 MPa时,红花种子的萌发受到抑制,它不仅降低了发芽率,而且延迟了发芽时间,导致发芽指数的降低;随着水势升高,抑制作用增强。不同品种间受到的抑制程度有显著差异。3个品种红花种子发芽中,PEG胁迫耐受能力大小排序为:‘裕民无刺’>‘吉红1号’>‘新红4号’。In order to study the effects of drought grades on seeds germination of Carthamus tinctorius L.,the author used‘Jihong No.1＇,‘Xinhong No.4＇and‘Yumin wuci＇as test materials, 3 Carthamus tinctorius L. varieties were investigated on their germination under treatments with different PEG concentrations. The results showed that： the PEG could retard the germination of stressed seeds, and the germination rate, germination index, and germination potential were all decreased with increasing PEG concentration, when it was under water potential≤-0.4 MPa. PEG 6000 impact seed germination with varying degrees of restrain about different safflower variety. Compared with varieties,‘Yumin wuci＇had the best drought resistance,‘Jihong No.1＇followed behind,‘Xinhong No.4＇ was weakest.

关 键 词：水分胁迫 红花 品种 PEG 种子发芽 

分 类 号：S567[农业科学—中草药栽培] Q948[农业科学—作物学]