SHU Ying-jie,ZHOU Yu-li,SHI Xia-qing,et al.Screening of Appropriate PEG-6000 Concentration for the Identification of Soybean Drought Tolerance at Germination Stage[J].Soybean Science,2015,34(01):56-59.[doi:10.11861/j.issn.1000-9841.2015.01.0056]
大豆种子发芽期耐旱性鉴定的适宜PEG-6000浓度筛选
- Title:
- Screening of Appropriate PEG-6000 Concentration for the Identification of Soybean Drought Tolerance at Germination Stage
- Keywords:
- Soybean(Glycine max); Polyethylene glycol (PEG-6000); Drought stress; Germination stage; Drought tolerance
- 分类号:
- S565.1
- 文献标志码:
- A
- 摘要:
- 以抗旱性不同的3个大豆品种(湘豆3号、Lee68和宁镇1号)为试材,研究了不同浓度(5%、10%、15%、20%、25%和30%)的PEG-6000模拟发芽期干旱胁迫对大豆种子发芽、子叶苗膜脂过氧化以及渗透调节物质含量的影响。结果表明:10%以下的PEG-6000能起引发作用,促进大豆种子的萌发,显著提高发芽势和发芽率;随着PEG-6000浓度的升高,大豆种子的发芽明显受抑制,当PEG-6000浓度大于25%时抑制更明显,发芽势、发芽率、发芽指数和简易活力指数显著下降;随着PEG-6000浓度的升高,大豆子叶苗中的丙二醛(MDA)、脯氨酸(Pro)、可溶蛋白和可溶性糖含量显著增加,PEG-6000浓度在15%~25%间增加幅度最大,PEG-6000浓度小于15%或大于25%时增加不明显。综合种子发芽、子叶苗的膜脂过氧化程度以及渗透调节物质含量的变化,可初步确定室内采用PEG-6000浸种法模拟干旱胁迫鉴定大豆发芽期耐旱性的适宜浓度为20%~25%。
- Abstract:
- Three soybean varieties(Ningzhen 1,Lee68 and Xiangdou 3)were used to study the effect of different PEG-6000 concentrations (5%, 10%, 15%, 20%, 25% and 30%)on germination of soybean seed, membrane lipid peroxidation and osmotic substances of soybean seedlings. Results showed that when the PEG-6000 concentration less than 10%,which can promote soybean seeds germination, improve the germination potential and germination rate significantly. When the PEG-6000 concentrations were more than 25%, with the increasement of PEG-6000 concentration,germination potential, germination rate, germination index and simple vigor index of soybean seed decreased significantly.The contents of malondialdehyde(MDA), proline (Pro), soluble protein and soluble sugar increased significantly with the PEG-6000 concentration increased, especially when the PEG-6000 concentration was between 15% and 25%.We can conclude preliminarily that the appropriate PEG-6000 concentration for the identification of soybean drought tolerance in seed germination stage was 20%-25% by synthesizing seed germination, membrane lipid peroxidation and the content change of osmotic substances.
参考文献/References:
[1]谢皓, 朱世明,包子敬,等. 干旱胁迫下大豆品种抗旱性评价与筛选[J]. 北京农学院学报,2008,28(3):7- 11.(Xie H, Zhu S M, Bao Z J, et al. Identification and selection of soybean drought resistant variety on the drought intimidation[J].Journal of Beijing University of Agriculture,2008, 28(3):7-11.)
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备注/Memo
基金项目:安徽省教育厅高等学校省级优秀青年人才基金(2012SQRL143);国家自然科学基金(31101212)。