草业学报2016，Vol.25Issue(4)：73-80,8.DOI:10.11686/cyxb2015301
不同温度和PEG处理对中华羊茅种子萌发的影响
Effects of different temperature and moisture conditions on seed germination of Festuca sinensis
摘要
Abstract
The aim of this study was to determine the most suitable moisture and temperature conditions for seed germination of Festuca sinensis .The germination of F .sinensis seeds was evaluated at 15,20,and 25℃, and under different moisture conditions imposed using various concentrations of polyethylene glycol (PEG). The F .sinensis seeds showed different germination features under different moisture and temperature condi-tions.The highest germination rate was at 25℃ and the lowest was at 15℃,suggesting that higher tempera-tures are beneficial for seed germination.At 15 and 20℃,the seed germination rate,germination potential, germination index,and vigor index of seeds were significantly higher in the -0.2 MPa water treatment than in the control and the other treatments (P <0.05).These results indicated that a low PEG concentration can im-prove F .sinensis seed vigor under low temperatures.However,at 25℃,the germination rate and germination index of seeds were higher in the control than in the PEG treatments (P <0.05)suggesting that PEG inhibited the germination of F .sinensis seeds at higher temperatures.The degree of inhibition increased with increasing PEG concentrations.As the PEG concentration increased,there were decreases in the seed germination rate, germination index,plumule length,radicle length,shoot ratio of seeds,seedling moisture content,and drought resistance.Together,these results show that a low concentration of PEG can promote F .sinensis seed germination whereas high concentrations of PEG can decrease seed vigor.关键词
中华羊茅/温度/聚乙二醇/种子萌发Key words
Festuca sinensis/temperature/PEG/seed germination引用本文复制引用
汪建军,麻安卫,汪治刚,蔡宇,旷宇,田沛..不同温度和PEG处理对中华羊茅种子萌发的影响[J].草业学报,2016,25(4):73-80,8.基金项目
国家基础研究发展规划“973”（2014CB138702），国家自然科学基金（31502001）和中央高校基本科研业务费（lzujbky-2014-76）资助。 （）
