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| 火炬树克隆片段在异质水分斑块中的水分及光响应初步研究 | |
| 引用本文： | 李小俊,张明如,张建国,吴刚,王圣杰,张华柳,王电杰.火炬树克隆片段在异质水分斑块中的水分及光响应初步研究[J].浙江林学院学报,2011,28(3). |
| 作者姓名： | 李小俊 张明如 张建国 吴刚 王圣杰 张华柳 王电杰 |
| 作者单位： | 1. 浙江农林大学林业与生物技术学院,浙江临安,311300 2. 浙江农林大学旅游与健康学院,浙江临安,311300 3. 中国科学院-水利部水土保持研究所,陕西杨凌,712100 4. 河北农业大学林学院,河北保定,071000 |
| 基金项目： | 国家自然科学基金资助项目，"十一五"国家林业科技支撑计划专题 |
| 摘 要： | 为探索木本克隆植物火炬树Rhus typhina母株与子株是否存在水分生理整合的生理生态过程,以火炬树母株与子株组成的克隆片段为研究对象,在母株后和子株前10 cm处截断水平根系并对子株进行浇水处理,以不浇水的克隆片断为对照,采用PSYPRO多露点水势仪和Li-6400xT光合分析仪,测定分析了火炬树克隆片段内母株与子株叶片的水势及光合参数.结果表明:①对子株浇水500mL后,处理母株与处理子株的水势均升高,处理母株的升幅为48.7%,处理子株的升幅为82.1%,差异不显著(P＞0.05),说明火炬树克隆子株片段在保证自身水分需要的同时,通过间隔子向母株传输水分,证实火炬树母株与子株间存在水分共享的传输机制.②处理母株的净光合速率Pn,蒸腾速率Tr,气孔导度G.及胞间二氧化碳摩尔分数Gi的响应值均超过了处理子株;处理子株与对照子株的净光合速率Pn,蒸腾速率Tr,气孔导度G.,及胞间二氧化碳质量分数Gr比较均无明显升高或下降.母株与子株的差异不显著(P＞0.05).③通过光响应曲线拟合,火炬树母株的光补偿点较低,光饱和点较高,表观量子效率较大.通过水分控制处理形成异质水分生境后,火炬树子株的光饱和点升高,光补偿点与表现量子效率均降低. |
| 关 键 词： | 森林生态学 火炬树 水势 水分共享 光响应曲线 |
Water and light response on cloned fragments of Rhus typhina with different water heterogeneous patches |
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| LI Xiao-jun,ZHANG Ming-ru,ZHANG Jian-guo,WU Gang,WANG Sheng-jie,ZHANG Hua-liu,WANG Dian-jie.Water and light response on cloned fragments of Rhus typhina with different water heterogeneous patches[J].Journal of Zhejiang Forestry College,2011,28(3). | |
| Authors: | LI Xiao-jun ZHANG Ming-ru ZHANG Jian-guo WU Gang WANG Sheng-jie ZHANG Hua-liu WANG Dian-jie |
| Institution: | LI Xiao-jun1,ZHANG Ming-ru2,ZHANG Jian-guo3,WU Gang1,WANG Sheng-jie4,ZHANG Hua-liu1,WANG Dian-jie1(1.School of Forestry and Biotechnology,Zhejiang A & F University,Lin'an 311300,Zhejiang,China,2.School of Tourism and Health,3.Institute of Soil and Water Conservation,Chinese Academy of Science and Ministry of Water Resources,Yangling 712100,Shaanxi,4.Forest College,Agricultural University of Hebei,Baoding 071000,Hebei,China) |
| Abstract: | Physiological integration characteristics of woody clonal plants has important influence on their use of habitat resources and colonization.To explore the water sharing mechanism in genets and ramets of Rhus typhina,fragments of genets and ramets were selected as the experimental material.Then,the water and light response on cloned fragment of Rhus typhina was studied comparing the genets and ramets in different water heterogeneous patches by measuring water potential and photosynthesis with PSYPRO Water Po... |
| Keywords: | forest ecology Rhus typhina water potential physiological integration of water light response curve |
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