ZHANG Qingxia,KOU Erfeng.Effects of PEG-6000 Stress on Seed Germination and Seedling Physiological Indexes of Three Cucumber Varieties[J].Northern Horticulture,2017,41(07):40-43.[doi:10.11937/bfyy.201707009]
聚乙二醇胁迫对黄瓜种子萌发及幼苗生理指标的影响
- Title:
- Effects of PEG-6000 Stress on Seed Germination and Seedling Physiological Indexes of Three Cucumber Varieties
- 关键词:
- 黄瓜; PEG-6000 胁迫; 种子萌发; 幼苗生理
- Keywords:
- cucumber; PEG-6000 stress; seed germination; seedling physiology
- 文献标志码:
- A
- 摘要:
- 以3个黄瓜品种的种子为试材，采用不同浓度（质量分数5%、10%、15%、20%）PEG-6000模拟干旱胁迫试验，测定了各品种的发芽率、相对发芽率、发芽指数、种子萌发抗旱指数、活力指数、种子活力抗旱指数、胚根长度以及幼苗叶绿素、丙二醛、脯氨酸含量。结果表明：各品种的发芽率、种子萌发抗旱指数、胚根长度等与PEG溶液的浓度呈明显的负相关关系；随PEG浓度的增加，3个黄瓜品种幼苗的丙二醛、脯氨酸含量增加，叶绿素含量有所下降；不同品种的抗旱性有所不同，“露地王”在种子萌发及生理指标方面均优于其它品种，表现出了最强的抗旱性。
- Abstract:
- Seeds of three common cucumber varieties were tested under different concentrations of PEG-6000(mass concentration 5%,10%,15%,20%) simulated drought stress.The testing items included germination rate of seeds,relative germination rate, germination index,seed germination drought resistance index,vigor index,seed vigor index of drought resistance,radicle length,chlorophyll content, MDA content and proline content.The results showed that,under stress of different PEG-6000 concentrations solution,the germination rate, the seed germination drought resistance index and radicle length of the various cucumber varieties,had a significant negative correlation with the concentration of PEG solution.As the PEG solution concentration increased,the MDA and the proline content in all seedlings of cucumber varieties increased,while chlorophyll content decreased.Drought resistance of each variety differed.‘Ludiwang’ showed the strongest drought resistance,it was more superior in germination and physiological indexes than other varieties.
参考文献/References:
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备注/Memo
第一作者简介：张庆霞（1979-），女，山东蒙阴人，博士，副教授，现主要从事园艺植物栽培与生理等研究工作。E-mail:zqx128@163.com.基金项目：庆阳市科技计划资助项目（ZJ2015-2）；陇东学院博士基金资助项目（XYBY1204）。