|
|
|
| Leaf Water Potential of Populus euphratica in the Ejin Oasis |
| Li Xiaoqin1,2, Zhang Xiaoyou1, Liu Xiaoqing1,2, Gao Guanlong1,2 |
1. Alashan Desert Eco-hydrology Experimental Research Station,Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou 730000, China;
2. University of Chinese Academy of Sciences, Beijing 100049, China |
|
|
|
|
Abstract Based on the data observed by WP4 Dewpoint Potential Meter at the Ejin Oasis, we mainly analyzed the daily and monthly variations in leaf water potential of Populus euphratica, and its relationship with impact factors. Results showed that it was a V-curve of the daily variation in leaf water potential of P. euphratica. The daily average value was -2.59±0.30 MPa and the minimums appear at 13:00 mostly. The monthly variation increased firstly and then decreased. The monthly average value was -2.44±0.30 MPa. As far as morphological difference was connected, trees with younger ages had higher leaf water potential. Leaves on the upper branches had lower water potential and vice versa. Water potentials of the oval leaves exceeded the lanceolate leaves as a whole. As far as environmental and plant physiological factors were connected, correlation analysis showed that there were highly significant negative linear correlations between leaf water potential and air temperature, vapor pressure deficit and transpiration rate. The correlation coefficients were -0.87, -0.69 and -0.88, respectively. Highly significant quadratic polynomial correlations were between leaf water potential and relative humidity and photosynthetic rate. The correlation coefficients were 0.85 and 0.92 in sequence. The study may provide theory guidance for better understanding of water stress and drought-resistance mechanism to of P. euphratica to some extent.
|
|
Received: 20 November 2013
Published: 20 May 2014
|
|
|
[1] 付爱红,陈亚宁,李卫红.新疆塔里木河下游胡杨不同叶形水势变化研究[J].中国沙漠,2008,28(1):83-88.
[2] 王庆彬,王恩姮,姜中珠,等.黑土区常见树种水分生理适应性及抗旱特性[J].东北林业大学学报,2009,37(1):12-14.
[3] 曾凡江,张希明,李小明.柽柳的水分生理特性研究进展[J].应用生态学报,2002,13(5):611-614.
[4] 付爱红,陈亚宁,李卫红,等.干旱、盐胁迫下的植物水势研究与进展[J].中国沙漠,2005,25(5):744-749.
[5] Donovan L A,Grise D J,West J B,et al.Predawn disequilibrium between plant and soil water potentials in two cold desert shrubs[J].Oecologia,1999,120:209-217.
[6] Morte A,Lovisolo C,Schubert A.Effect of drought stress on growth and water relations of the mycorrhizal association Helianthemum almeriense-Terfezia claveryi[J].Mycorrhiza,2000,10:115-119.
[7] 高鹭,胡春胜,陈素英.喷灌条件下不同灌水处理冬小麦的叶水势特征[J].土壤,2005,37(4):410-414.
[8] 李磊,贾志清,朱雅娟,等.不同灌溉量梯度下胡杨和新疆杨苗期的抗旱性比较[J].干旱区资源与环境,2010,23(7):154-161.
[9] 魏晓霞,呼和牧仁,周梅,等.不同年龄华北落叶松叶水势及其影响因素的研究[J].干旱区资源与环境,2010,24(7):144-148.
[10] 司建华,冯起,张小由.极端干旱区胡杨水势及影响因子研究[J].中国沙漠,2005,25(4):505-510.
[11] 曾凡江,张希明,李向义,等.塔克拉玛干沙漠南缘柽柳和胡杨水势季节变化研究[J].应用生态学报,2005,16(8):1389-1398.
[12] 邓雄,李小明,张希明,等.4种荒漠植物气体交换特征的研究[J].植物生态学报,2002,26(5):605-612.
[13] 宋耀选,周茂先,张小由,等.额济纳绿洲主要植物的水势与环境因子的关系[J].中国沙漠,2005,25(4):496-499.
[14] 占东霞,庄丽,王仲科,等.准噶尔盆地南缘干旱条件下胡杨、梭梭和柽柳水势对比研究[J].新疆农业科学,2011,48(3):544-550.
[15] 杨培林,彭俊,钟新才.不同水分处理下防护林树种叶水势、茎水势及土水势的研究[J].新疆农业科学,2012,49(2):273-278.
[16] 占东霞,庄丽,李卫红,等.准噶尔盆地南缘“丰收林”胡杨水势[J].生态学杂志,2011,30(4):643-649.
[17] 付爱红,陈亚宁,李卫红,等.新疆塔里木河下游不同地下水位的胡杨水势变化分析[J].干旱区地理,2004,27(2):207-211.
[18] 王海珍,韩路,周正立,等.胡杨、灰叶胡杨水势对不同地下水位的动态响应[J].干旱地区农业研究,2007,25(5):125-129.
[19] 席海洋,冯起,司建华.实施分水方案后对黑河下游地下水影响的分析[J].干旱区地理,2007,30(4):487-495.
[20] 郭巧玲,冯起,任韶斐,等.黑河生态输水对流域植被的影响研究[J].中国农村水利水电,2009,(3):36-40.
[21] 司建华,冯起,席海洋,等.黑河下游额济纳绿洲生态需水关键期及需水量[J].中国沙漠,2013,33(2):560-567.
[22] Yu T F,Feng Q,Si J H,et al.Hydraulic redistribution of soil water by roots of two desert riparian phreatophytes in northwest China's extremely arid region[J].Plant and Soil,2013,372:297-308.
[23] 李吉跃,翟洪波,刘晓燕.树木水力结构特征的昼夜变化规律[J].北京林业大学学报,2002,24(4):39-44.
[24] 司建华,冯起,张小由,等.热脉冲技术测定树干液流研究进展[J].冰川冻土,2007,29(3):475-480.
[25] 孙鹏森,马履一,王小平,等.油松树干液流的时空变异性研究[J].北京林业大学学报,2000,22(5):1-6.
[26] Jarvis P G.The interpretation of the variations in leaf water potential and stomatal conductance found in canopies in the field[J].Philosophical The Royal Society B:Biological Sciences,1976,273: 593-610.
[27] 苏培玺,张立新,杜明武,等.胡杨不同叶形光合特性、水分利用效率及其对加富CO2的响应[J].植物生态学报,2003,27(1):34-40.
[28] 杨树德,郑文菊,陈国仓,等.胡杨披针形叶与宽卵圆形叶的超微结构与光合特性的差异[J].西北植物学报,2005,25(1):14-21.
[29] 常宗强,冯起,苏永红,等.额济纳绿洲胡杨的光合特征及其对光强和CO2浓度的响应[J].干旱区地理,2006,29(4):496-502.
[30] Warrs W R,Neilson R E,Jarvis P G.Photosynthesis in Sitka spruce (Picea sitchensis(Bong.) Carr.):Ⅶ.Measurements of stomatal conductance and 14CO2 uptake in a forest canopy[J].Journal of Applied Ecology,1976,13(2):623-638.
[31] Landsberg J J,Beadle C L,Biscoe P V,et al.Diurnal energy,water and CO2 exchanges in an apple (Malus pumila) prchard[J].Journal of Applied Ecology,1975,12(2):659-684. |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
2014, Vol. 34 
