| 几种生态因子对菊科外来入侵植物春飞蓬种子萌发的影响 |
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| 引用本文： | 韩琪,郝建华,胡花,李家瑞,刘倩,戚静敏,邓铭,周蓓蓓.几种生态因子对菊科外来入侵植物春飞蓬种子萌发的影响[J].常熟理工学院学报,2012,26(2):71-75. |
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| 作者姓名： | 韩琪 郝建华 胡花 李家瑞 刘倩 戚静敏 邓铭 周蓓蓓 |
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| 作者单位： | 常熟理工学院生物与食品工程学院,江苏常熟,215500 |
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| 基金项目： | 苏州市科技计划项目“苏州市外来农业有害生物的风险评估;早期预警和防除”，常熟理工学院2011年度大学生实践创新训练计划项目“各种生态因子对一年蓬和春一年蓬的种子萌发的影响”，常熟理工学院毕业论文重点团队课题“几个入侵植物功能性状的近缘种比较研究” |
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| 摘 要： | 在实验室条件下，测定了不同光照长度、pH值、渗透势、盐浓度等各种生态因子对春飞蓬种子萌发的影响．结果表明，在0L／24D，8L／16D，12L／12D和16L／8D等四个光照长度条件下，春飞蓬种子的萌发率之间没有显著差异．在pH6到pH8的环境中春飞蓬种子的萌发率均超过O．30，在pH7时萌发率最高，达0．51±0．05；在pH4和pH5、的酸性环境和pH9和pH10的碱性环境中，春飞蓬种子均不能萌发．种子对渗透势浓度的变化敏感，在-0．05Mpa及更低的渗透势浓度下，春飞蓬种子的萌发率比对照（0Mpa）显著降低．春飞蓬种子能在适度的盐浓度（0．05mol／L到0．10mol／L）条件下萌发，在NaCl浓度为0．15mol／L及以上时几乎不能萌发。
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| 关 键 词： | 春飞蓬 外来入侵植物 种子萌发 菊科 生态因子 |
The Influences of Some Ecological Factors on the Seed Germination of Erigeron philadelphicus, an Invasine Alien Plant in Asteraceae |
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| HAN Qi, HAO Jian-hua, HU Hua, LI Jia-rui, LIU Qian, QI Jing-min, DENG Ming, ZHOU Bei-bei.The Influences of Some Ecological Factors on the Seed Germination of Erigeron philadelphicus, an Invasine Alien Plant in Asteraceae[J].Journal of Changshu Institute of Technology,2012,26(2):71-75. |
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| Authors: | HAN Qi HAO Jian-hua HU Hua LI Jia-rui LIU Qian QI Jing-min DENG Ming ZHOU Bei-bei |
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| Institution: | (School of Biology and Food Engineering, Changshu Institute of Technology, Changshu 215500, China) |
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| Abstract: | Under the laboratory conditions, it is studied that the influences of light, pH, osmotic potential and salinity on the seed germination of Erigeron philadelphicus, an invasine alien plant in Asteraceae. The result showed that there were no significant differences in the seed germination rates among different light lengths of 0L/24D, 8L/16D, 12L/12D and 16L/8D. The seed germination rates were all over 0.30 under pH6 to pH8, and were greatest for pH7 (0.51±0.05), but there was no seed germination either in the acidic environment of pH4 and pH5 or in the alkaline environment of pH9 and pH10. Seed germination was sensitive to osmotic potentials and the germination rates decreased significantly when osmotic potentials were -0.05 Mpa or lower than it. Seeds could germinate in moderate NaCl solution concentrations (0.05mol/L to 0.10mol/L). Almost no seeds could germinate in a NaCl solution at a concentration of 0.15mol/L or higher than it. |
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| Keywords: | Erigeron philadelphicus invasive alien plants seed germination Asteraceae ecological factor |
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