|
|||||
|
|
| 胡杨异形叶叶绿素荧光特性对高温的响应 | |
| 引用本文： | 王海珍,韩路,徐雅丽,王琳,贾文锁.胡杨异形叶叶绿素荧光特性对高温的响应[J].生态学报,2011,31(9):2444-2453. |
| 作者姓名： | 王海珍 韩路 徐雅丽 王琳 贾文锁 |
| 作者单位： | 1. 中国农业大学农学与生物技术学院,北京,100139;新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔,843300;塔里木大学植物科学学院,新疆阿拉尔,843300 2. 新疆生产建设兵团塔里木盆地生物资源保护利用重点实验室,新疆阿拉尔,843300;塔里木大学植物科学学院,新疆阿拉尔,843300 3. 塔里木大学植物科学学院,新疆阿拉尔,843300 4. 中国农业大学农学与生物技术学院,北京,100139 |
| 基金项目： | 国家自然科学基金项目(30960033);塔里木盆地生物资源保护利用兵团重点实验室开放基金(BR0810) |
| 摘 要： | 胡杨(Populus euphratica Oliv)是塔里木极端干旱荒漠区优势乔木树种,由于其生长在荒漠环境中,极端高温远高于其它地区,因此研究胡杨对高温胁迫的响应特征对于解释胡杨的抗逆机理与生态适应策略具有极为重要的意义。以胡杨3种典型的异形叶为材料,研究不同温度对其叶绿素荧光特性和能量分配的影响。结果表明,25-45 ℃温度下胡杨异形叶的F0、Fm、Fv/Fm与Fv/F0变化不大,尤其Fv/Fm仍能保持在0.78左右,光合反应正常;高温胁迫下(＞45 ℃)Fm、Fv/F0、Fv/Fm、F'v/F'm、qP、ΦPSⅡ、P和ETR均大幅降低;F0、qN、E显著上升,而D先上升后下降,说明高温抑制了PSⅡ的功能,使PSⅡ反应中心活性下降,QA-的还原速率加快,光化学电子传递速率降低,某些能量耗散途径受阻,影响了PSⅠ和PSⅡ激发能的平衡分配,最终导致光合机构受损、光合速率降低。胡杨3种异形叶的叶绿素荧光参数随温度升高变幅不同,高温处理下锯齿阔卵形叶各参数均高于卵形叶与条形叶,表明锯齿阔卵形叶比卵形叶和条形叶具有更强的高温耐受能力。用模糊数学的隶属度函数对胡杨3种异形叶的耐热性进行综合评价,锯齿阔卵形叶的耐热性最强。 |
| 关 键 词： | 胡杨 异形叶 高温胁迫 叶绿素荧光特性 耐热性 |
| 收稿时间： | 6/9/2010 12:00:00 AM |
| 修稿时间： | 2011/2/22 0:00:00 |
Response of chlorophyll fluorescence characteristics of Populus euphratica heteromorphic Leaves to high temperature |
|
| WANG Haizhen,HAN Lu,XU Yali,WANG Lin and JIA Wensuo.Response of chlorophyll fluorescence characteristics of Populus euphratica heteromorphic Leaves to high temperature[J].Acta Ecologica Sinica,2011,31(9):2444-2453. | |
| Authors: | WANG Haizhen HAN Lu XU Yali WANG Lin and JIA Wensuo |
| Institution: | College of Agriculture & Biotechnology, China Agricultural University, Beijing 100193, China;Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar 843300,China;College of Plant Science of Tarim University, Alar, 843300,China;Xinjiang Production & Construction Corps Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin, Alar 843300,China;College of Plant Science of Tarim University, Alar, 843300,China;College of Plant Science of Tarim University, Alar, 843300,China;College of Plant Science of Tarim University, Alar, 843300,China;College of Agriculture & Biotechnology, China Agricultural University, Beijing 100193, China |
| Abstract: | Populus euphratica Oliv,a member in the family Salicaceae,is typical xeromorphic mesophyte and an important tree species of desert riparian forests in arid regions.It is mainly distributed in central Asia,west Asia and the Mediterranean region,especially in the basins of inland rivers of the northwest arid regions of China where it occupies the widest distribution area.The largest and most typical desert riparian forest is found along the Tarim River and occupies over 350,000 km2.P.euphratica possesses many... |
| Keywords: | Populus euphratica Oliv heteromorphic leaves high-temperature stress heat-tolerance chlorophyll fluorescence characteristics |
| 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 | |