| 干旱胁迫与温度变化对粉花桔梗种子萌发特性的影响 |
| |
| 引用本文： | 仉劲,李国清,于清伟.干旱胁迫与温度变化对粉花桔梗种子萌发特性的影响[J].农学学报,2018,8(6):58-61. |
| |
| 作者姓名： | 仉劲 李国清 于清伟 |
| |
| 作者单位： | 泰安市农业科学研究院,泰安市农业科学研究院,泰安市农业科学研究院 |
| |
| 基金项目： | 泰安市科学技术发展计划（引导计划）“桔梗新品系选育与配套栽培技术研究”(2017NS0087)；山东省农科院院地科技合作引导计划项目 “特异桔梗种质筛选与鉴定”(2015YDHZ30)。 |
| |
| 摘 要： | 旨在为粉花桔梗种子萌发提供技术支撑，为桔梗新品系的示范推广提供技术参考。以粉花桔梗种子为试验材料，设置4 个PEG-6000 溶液处理5% PEG-6000(H1)、10% PEG-6000(H2)、15% PEG-6000(H3)和蒸馏水对照(CK)]和3 个温度处理15℃(T1)、20℃(T2)、25℃(T3)]，进行光照培养（12 h 光/12 h 暗），测定种子发芽率和发芽势。结果表明，不同干旱胁迫程度（PEG浓度）与温度变化对粉花桔梗种子萌发的时间、发芽率以及发芽势均呈现出显著性相关。在不同温度条件下，随着干旱程度的增加，发芽率逐渐的降低；同时低温不利于桔梗种子萌发，当温度低于15℃或干旱程度程度大于15% PEG时，种子萌发起始时间延迟，发芽率开始降低。在干旱胁迫程度小于5% PEG的条件下，温度在20℃、25℃时的条件下桔梗种子能够良好萌发。
|
| 关 键 词： | 葡萄霜霉病菌 葡萄霜霉病菌 初始发生 孢子囊 气象因素 不同品种 |
| 收稿时间： | 2017/10/9 0:00:00 |
| 修稿时间： | 2017/12/11 0:00:00 |
Drought Stress and Temperature Change Affect Seed Germination Characteristics of Platycodon Grandiflorum |
| |
| Abstract: | The objectives are to provide the technical support for seed germination of Platycodon Grandiflorum, and technical reference for demonstration and popularization of new lines of Platycodon Grandiflorum. The seeds of Platycodon Grandiflorum were used as materials, four PEG-6000 treatments 5% PEG-6000(H1), 10% PEG-6000(H2), 15% PEG-6000(H3) and distilled water (CK)] and three temperature treatments 15℃(T1), 20℃(T2), 25℃(T3)] were set up. The seeds were cultivated with light culture (12 h light/
12 h dark), and then the germination rate and germination potential was detected. The results showed that different drought stresses (PEG concentration) and temperature change affected the seed germination time, germination rate and germination potential significantly. Under different temperature, the germination rate decreased gradually with the drought stress increase. Low temperature was bad for the seed germination, the initiatory time of seed germination was delayed and the germination rate began to decrease when the temperature was below 15℃, or the degree of drought was more than 15% PEG. When the drought stress was below 5% PEG, the germination of Platycodon grandiflorum was good at the temperature of 20℃ and 25℃. |
| |
| Keywords: | Medicinal plants Platycodon grandiflorum Temperature Drought Stress Seed Germination |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《农学学报》浏览原始摘要信息 |
| 点击此处可从《农学学报》下载免费的PDF全文 |
|
