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中国农学通报

中国农学通报 ›› 2013, Vol. 29 ›› Issue (34): 207-211.doi: 10.11924/j.issn.1000-6850.2013-0929

所属专题： 农业气象

• 林学 园艺 园林 • 上一篇    下一篇

干旱胁迫对3个品种红花种子萌发的影响

李威 张曦 谭勇 周玲玉 王恒 陈文   

  • 收稿日期:2013-04-02 修回日期:2013-05-09 出版日期:2013-12-05 发布日期:2013-12-05

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

谭勇 TAN Yong   

  • Received:2013-04-02 Revised:2013-05-09 Online:2013-12-05 Published:2013-12-05

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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’。

关键词: 品质与抗性改良, 品质与抗性改良

Abstract: 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, three 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.