LI Wei-fen,QIN Rong,LIU Fa-wan,et al.Study on Physiological Changs of Brassica juncea Coss.Under Drought Stress Simulated by PEG6000[J].Northern Horticulture,2013,37(21):5-8.
芥菜在聚乙二醇模拟干旱条件下的生理变化研究
- Title:
- Study on Physiological Changs of Brassica juncea Coss.Under Drought Stress Simulated by PEG6000
- 文章编号:
- 1001-0009(2013)21-0005-04
- 关键词:
- 芥菜; 苗期; 抗旱性; 聚乙二醇（PEG6000）; 模拟干旱胁迫
- Keywords:
- Brassica juncea Coss.; seeding stage; drought resistance; PEG6000; simulated drought stress
- 分类号:
- S 637
- 文献标志码:
- A
- 摘要:
- 以云南地方芥菜品种“M100”（Brassica juncea Coss.）为试材，研究了5％、8％和10％聚乙二醇（PEG6000）渗透胁迫下芥菜幼苗的叶绿素含量、丙二醛(MDA)含量、脯氨酸含量、可溶性糖含量、相对含水量、相对电导率和Fv/Fm等生理指标随胁迫处理时间的变化。结果表明：随着PEG6000胁迫时间的延长或PEG6000浓度的升高，芥菜叶片叶绿素含量、相对含水量、Fv/Fm下降比较明显，MDA含量、脯氨酸含量、可溶性糖含量和相对电导率则表现出不同程度的增加趋势。其中MDA含量、脯氨酸含量、可溶性糖含量、相对含水量和相对电导率5个指标在PEG6000浓度为10%时，各处理间差异显著，因此，这5个指标可用于测定芥菜的耐旱性。
- Abstract:
- Taking Yunnan local mustard variety ‘M100’ (Brassica juncea Coss.) as test material，the physiological changes under PEG6000 stress with the concentrations of 5%，8% and 10% were investigated.Physiological indexes such as the content of chlorophyll，MDA，proline，soluble sugar，relative water content，relative electric conductivity，Fv/Fm were determined with the prolongation of the time of PEG6000-induced stress.The results showed that with the increasing of PEG6000 concentration and the prolongation of treatment time，chlorophyll，relative water content，Fv/Fm of the leaf decreased obviously，and the content of MDA，proline，soluble sucrose，relative electric conductivity increased in varying degrees.Among these indexes，MDA content，proline content，soluble sugar content，relative water content，relative electric conductivity reached a significant difference between treatments under the concentration of 10% PEG6000 simulated drought stress，so these five indexes could be used for determination of mustard drought resistance.
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备注/Memo
第一作者简介：李卫芬（1977-），女，云南丽江人，硕士，助理研究员，现主要从事蔬菜资源开发与利用等研究工作。E-mail：1614242375@qq.com.