| 塔里木河下游地下水埋深对胡杨气体交换和叶绿素荧光的影响 |
| |
| 引用本文： | 陈亚鹏,陈亚宁,徐长春,李卫红,付爱红.塔里木河下游地下水埋深对胡杨气体交换和叶绿素荧光的影响[J].生态学报,2011,31(2):344-353. |
| |
| 作者姓名： | 陈亚鹏 陈亚宁 徐长春 李卫红 付爱红 |
| |
| 作者单位： | 1. 中国科学院新疆生态与地理研究所,乌鲁木齐,830011;中国科学院绿洲生态与荒漠环境重点实验室,乌鲁木齐,830011
2. 新疆大学资源与环境科学学院,乌鲁木齐,830046 |
| |
| 基金项目： | 国家自然科学基金(40871059); 国家科技支撑计划项目(2006BAC01A03); 中国科学院"西部之光"计划(XBBS 200804) |
| |
| 摘 要： | 为了分析干旱环境下地下水埋深变化对胡杨(Populus euphratica oliv.)光合作用的影响,对塔里木河下游3个地下水埋深(4.91,6.93m和8.44m)环境下胡杨叶片的气体交换日变化、光响应曲线、PN-Ci曲线以及叶绿素荧光特性等进行了比较研究。研究结果表明:当地下水埋深从4.91m增加到6.93m和8.44m,胡杨光合速率(PN)(10:00),初始荧光(F0)、最大荧光(Fm)、以及PSⅡ实际光化学效率(ΩPSⅡ)、电子传递速率(ETR)、非光化学猝灭系数(NPQ)和正午叶水势(Ψmidday)等都发生了明显变化,其中胡杨NPQ增加了109% 127%,ΩPSⅡ,ETR和Ψmidday分别减小了24% 29%,17% 22%和31.6% 45.6%,表明胡杨受到的干旱胁迫程度在增加;而当地下水埋深在6.93 8.44m之间时,上述参数无显著变化,表明胡杨很可能处于相同干旱胁迫程度;并且在地下水埋深4.91 8.44m范围内,最大光化学效率(Fv/Fm),表观量子效率(φ),Rubisco羧化速率(Vcmax), 等参数都未发生明显变化,表明即使地下水埋深增加到8.44m,此时的干旱胁迫程度也未超过胡杨的耐受能力,其光合能力也未受到不可逆转的伤害。
|
| 关 键 词： | 胡杨(Populus euphratica oliv.) 叶绿素荧光 地下水埋深 光合作用 |
| 收稿时间： | 2009/11/25 0:00:00 |
| 修稿时间： | 2010/9/15 0:00:00 |
Effects of groundwater depth on the gas exchange and chlorophyll fluorescence of Populus euphratica in the lower reaches of Tarim River |
| |
| CHEN Yapeng,CHEN Yaning,XU Changchun,LI Weihong and FU Aihong.Effects of groundwater depth on the gas exchange and chlorophyll fluorescence of Populus euphratica in the lower reaches of Tarim River[J].Acta Ecologica Sinica,2011,31(2):344-353. |
| |
| Authors: | CHEN Yapeng CHEN Yaning XU Changchun LI Weihong and FU Aihong |
| |
| Institution: | Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Key Laboratory of Oasis Ecology and Desert Environment, Chinese Academy of Sciences, Urumqi 830011, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Key Laboratory of Oasis Ecology and Desert Environment, Chinese Academy of Sciences, Urumqi 830011, China;School of Resources and Environmental Science, Xinjiang University, Urumqi 830046, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Key Laboratory of Oasis Ecology and Desert Environment, Chinese Academy of Sciences, Urumqi 830011, China;Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China; Key Laboratory of Oasis Ecology and Desert Environment, Chinese Academy of Sciences, Urumqi 830011, China |
| |
| Abstract: | To reveal the effects of groundwater depth change on gas exchange and chlorophyll fluorescence of Populus euphratica grown in arid region,we measured and conducted comparative studies among the daily course of gas exchange,light response curve,photosynthetic response to CO2(PN-Ci curve),chlorophyll fluorescence parameters,leaf water potential,and chlorophyll content of P.euphratica grown at different groundwater depths(4.91m,6.93m and 8.44m) in the lower reaches of Tarim River.The results showed that the ne... |
| |
| Keywords: | Populus euphratica chlorophyll fluoresce groundwater depth photosynthesis |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《生态学报》浏览原始摘要信息 |
| 点击此处可从《生态学报》下载免费的PDF全文 |
|
