| 种子发芽对水分胁迫的响应 |
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| 引用本文： | 张香凝 1,孙向阳 1ˇ,王保平 2,崔令军 2,乔 杰 2. 种子发芽对水分胁迫的响应[J]. 西北林学院学报, 2008, 23(3) |
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| 作者姓名： | 张香凝 1 孙向阳 1ˇ 王保平 2 崔令军 2 乔 杰 2 |
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| 作者单位： | 1.北京林业大学 水土保持学院，教育部 水土保持与荒漠化防治重点实验室，北京，100083; 2.国家林业局 泡桐研究开发中心，河南 郑州，450003 |
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| 摘 要： | 为了深入了解 Larrea tridentata 的发芽特性，全面掌握 Larrea 的抗旱生理特性，采用PEG溶 液人工模拟水分胁迫的方法，研究了 L.tridentata种子萌芽对水分胁迫反应过程。结果表明，Larrea 种子发芽过程的水势范围为 0～-0.44MPa;随着水分胁迫加剧 ，种子发芽率、发芽势、发芽速度呈显 著下降趋势 ;当水势为 -0.64 MPa时 ，种子便不能发芽。说明水分胁迫对 L. tridentata种子发芽的 影响较大，但其发芽过程可在一定水分胁迫的干旱生境下完成。
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| 关 键 词： | Larrea tridentata 水分胁迫 种子 发芽 |
Response of Larrea tridentata Seed Germination to Water Stress |
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| ZHANG Xiangˉning 1,SUN Xiangˉyang 1ˇ,WANG Baoˉping 2,CUI Lingˉjun 1,QIAO Jie 2. Response of Larrea tridentata Seed Germination to Water Stress[J]. Journal of Northwest Forestry University, 2008, 23(3) |
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| Authors: | ZHANG Xiangˉning 1 SUN Xiangˉyang 1ˇ WANG Baoˉping 2 CUI Lingˉjun 1 QIAO Jie 2 |
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| Affiliation: | 1.Beijing Forestry University ，Beijing100083，China; 2.Paulownia Research and Development Center of China，Zhengzhou， Henan450003， China |
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| Abstract: | Responses of Larrea tridentat seed germination to water stress were studied by means of the artificial simulation method of water stress by using PEG to find out the germination characteristic amply and to understand the drought resistance characteristic of L.tridentata roundly.The results showed that water stress has grent influˉ ence in seed germination.In the process of seed germination，the water potential range was 0～-0.44 MPa， and as water stress aggravated， the germination percentage，power， and speed decreased significantly.When the water potential was-0.64 MPa， seeds could not germinate， indicating that the process of seed germination of L. triˉ dentata can becomplete in drought environment to some extent. |
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| Keywords: | Larrea tridentata water stress seed germination |
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