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| 水分胁迫条件下臭柏匍匐茎的蒸腾和吸水特性 | |
| 引用本文： | 李玉灵,王玉魁,王俊刚,三木直子,坂本圭児,吉川賢.水分胁迫条件下臭柏匍匐茎的蒸腾和吸水特性[J].林业科学,2009,45(9). |
| 作者姓名： | 李玉灵 王玉魁 王俊刚 三木直子 坂本圭児 吉川賢 |
| 作者单位： | 1. 河北农业大学林学院,保定,071000 2. 国家林业局泡桐研究开发中心,郑州,450003;北京林业大学水土保持学院,北京,100083 3. 日本冈山大学大学院环境学研究科,冈山,7008530 |
| 基金项目： | 河北省人事厅留学回国基金项目，河北农业大学留学回国基金，国家林业局"948"引进项目 |
| 摘 要： | 在臭柏长期室内石砾土栽培条件下,通过培养液中加入PEG以调节溶液渗透势,设置对照区(pF值3.0)、水分胁迫区(pF值2.3)2种处理,并分别从匍匐茎中部人工培养不定根,测定有不定根和无不定根匍匐茎小枝的蒸腾速率、气孔导度及其水势的日变化和叶片水分特性.结果表明:1)在水分胁迫条件下,匍匐茎先端小枝通过降低正午水势提高吸水能力;基部小枝通过控制蒸腾,维持枝条水势防止失水.2)有不定根的匍匐茎通过降低质壁分离时的水势(ψwtlp)和充分吸水时的渗透势(ψ,ssat)提高吸水能力,而且增加细胞弹性率,迅速降低膨压保证失水时能尽快关闭气孔;而无不定根匍匐茎虽然吸水能力较差,但细胞壁柔软,即使蒸腾失水,也能在较长时间内维持膨压,保证生命活动进行. |
| 关 键 词： | 水分胁迫 臭柏 匍匐茎 不定根 水势 |
Transpiration and Water Uptake of Sabina vulgaris Stolon under Water Stress |
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| Li Yuling,Wang Yukui,Wang Jungang,Miki Naoko,Sakamoto Keiji,Yosikawa Ken.Transpiration and Water Uptake of Sabina vulgaris Stolon under Water Stress[J].Scientia Silvae Sinicae,2009,45(9). | |
| Authors: | Li Yuling Wang Yukui Wang Jungang Miki Naoko Sakamoto Keiji Yosikawa Ken |
| Institution: | 1.Forest College;Agricultural University of Hebei Baoding 071000;2.Paulownia Research & Development Center of the State Forestry Administration Zhengzhou 450003;3.Grad Sch Env Sci;Okayama Univ Okayama Japan 7008530;4.College of Soil and Water Conservation;Beijing Forestry University Beijing 100083 |
| Abstract: | The stolons with and without adventitious roots of Sabina vulgaris were grown under controlled conditions of the pF 3.0 and pF 2.3 treatments by using PEG(polyethylene glycol) in their culture solutions. Diurnal changes of transpiration rate,stomatal conductance and water potential were measured. Leaf water relations were analyzed by Pressure-Volume curve. The results showed that:branches growing on the top part of stolons increased the ability of water absorption by lowering minimum potential under water s... |
| Keywords: | water stress Sabina vulgaris stolon adventitious root water potential |
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