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| 桔梗种子萌发对低温、干旱及互作胁迫的响应 | |
| 引用本文： | 刘自刚,沈冰,张雁.桔梗种子萌发对低温、干旱及互作胁迫的响应[J].生态学报,2013,33(8):2615-2622. |
| 作者姓名： | 刘自刚 沈冰 张雁 |
| 作者单位： | 1. 西安理工大学西北水资源与环境生态教育部重点实验室,西安710048;甘肃省干旱生境作物学重点实验室甘肃农业大学,兰州730070 2. 西安理工大学西北水资源与环境生态教育部重点实验室,西安,710048 3. 西安理工大学西北水资源与环境生态教育部重点实验室,西安710048;商洛学院城乡发展与管理工程系,商洛726000 |
| 基金项目： | 国家自然科学基金重点资助项目，国家自然科学基金资助项目 |
| 摘 要： | 以药用植物桔梗种子为材料,研究了低温、干旱及其互作对种子萌发和幼苗生长的影响,旨在探索在春寒干旱条件下其种子萌发对策及生态适应性,为桔梗野生种群恢复及人工栽培群体构建提供依据.结果表明,温度、干旱及其互作对桔梗种子萌发和幼苗生长均有显著影响.0-10％ PEG水分条件下,在变温10/20℃及恒温15-25℃下桔梗种子能够良好萌发(10％ PEG、20℃除外),而15％ PEG可显著抑制萌发.低温(10℃)下种子萌发始时间延迟,发芽率降低.随干旱胁迫程度的增加,10℃发芽率呈先升后降趋势,而其它温度下,发芽率和发芽指数均呈下降趋势.随温度的降低,幼苗根长、茎长及鲜重均呈下降趋势,且幼根生长对温度变化更为敏感. |
| 关 键 词： | 桔梗 温度 干旱胁迫 种子萌发 |
| 收稿时间： | 2012/1/10 0:00:00 |
| 修稿时间： | 2012/10/26 0:00:00 |
Morphological responses to temperature, drought stress and their interaction during seed germination of Platycodon grandiflorum |
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| LIU Zigang,SHEN Bing and ZHANG Yan.Morphological responses to temperature, drought stress and their interaction during seed germination of Platycodon grandiflorum[J].Acta Ecologica Sinica,2013,33(8):2615-2622. | |
| Authors: | LIU Zigang SHEN Bing and ZHANG Yan |
| Institution: | Northwest Key Laboratory of Water Resource and Environment Ecology,Ministry of Education,Xi'an University of Technology, Xi'an 710048, China;Key Laboratory of Arid Land Crop Science in Gansu Province; Gansu Agricultural University,Lanzhou 730070,China;Northwest Key Laboratory of Water Resource and Environment Ecology,Ministry of Education,Xi'an University of Technology, Xi'an 710048, China;Northwest Key Laboratory of Water Resource and Environment Ecology,Ministry of Education,Xi'an University of Technology, Xi'an 710048, China;Department of Urban and Rural Development & Management Engineering, Shangluo University, Shangluo 726000, China |
| Abstract: | |
| Keywords: | Platycodon grandiflorum temperature stress drought stress seed germination |
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