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Seasonal characteristics of chlorophyll fluorescence kinetics of heteromorphic leaves in Populus euphratica

Research in Cold and Arid Regions 2018年第2期10卷 169-179页

作者： ZongQiang Chang Hua Tao Qiang Zhu Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences

Populus euphratica Oliver grown in desert areas have polymorphic leaves, which include lanceolate to serrate oval leaves.This paper measures the chlorophyll fluorescence-induction kinetics curves of two types of heteromorphic leaves(lanceolate and serrate oval) of P. euphratica over the growth season in the Ejina Desert area, China. This is in order to study the electron transport, as well as absoprtion, distribtution, and dissipation of light energy and their adaptation characteristics.The results indicate that(1) serrate oval leaves' photosystem II(PSII) initial light-energy-conversion efficiency(Fv/Fm),potential activity(Fv/F_0), and the light-energy-utilization parameter(PI) are higher than those of lanceolate leaves; the accumulated amount of Q_A-(V_j) and the relative speed of Q_A deoxidation(M_0) are lower than those of lanceolate leaves;(2)the reaction center density(RC/CS_0) and electron-transfer energy(ET_0/CS_0) in the unit cross-sectional area of serrate oval leaves are higher than those of lanceolate leaves; the energy consumed in unit cross-sectional area(DI_0/CS_0), and energyflow parameters(ABS/RC, ET_0/RC, TR_0/RC, and DI_0/RC) in the unit reaction center of serrate oval leaves are lower than those of lanceolate leaves;(3) the proportion of energy used for photochemical reaction and energy electron transport in serrate oval leaves(Φ_(P0), Ψ_0, and Φ_(E0)) are larger than those in lanceolate leaves, and the maximum quantum yield(Φ_(D0)) of nonphotochemical reaction is less than that of lanceolate leaves. Thus, serrate oval leaves of P. euphratica have a more efficient energy-distribution strategy and better adaptability to extreme environmental conditions than lanceolate leaves.

关键词： chlorophyll fluorescence-induction kinetics seasonal changes Populus euphratica Oliver lanceolate leaves oval leaves

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Evapotranspiration of a Populus euphratica Oliv. forest and its controlling factors in the lower Heihe River Basin,Northwest China

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Research in Cold and Arid Regions 2017年第2期9卷 175-182页

作者： TengFei Yu Qi Feng JianHua Si XiaoYou Zhang ChunYan Zhao Alax Desert Eco-hydrology Experimental Research Station Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences Lanzhou Gansu 730000 China Key Laboratory of Eco-hydrology of Inland River Basin Chinese Academy of Sciences Lanzhou Gansu 730000 China Gansu Hydrology and Water Resources Engineering Research Center Lanzhou Gansu 730000 China

Evapotranspiration(ET) within an ecosystem is crucial for the water-limited environment that currently lacks adequate quantification in the arid region of Northwest China, mainly covered by phreatophytes, such as the Populus euphratica Oliv. tree and the Tamarix ramosissima Ledeb. shrub species. Accordingly, ET was measured for an entire year using eddy covariance(EC) in P. euphratica stands in the lower Heihe River Basin, Northwest China. During the growing season,the total ET was 850 mm, with a mean of 4.0 mm/d, which is obviously more than that observed at tree-level and standlevel scales, which was likely due to the different level of soil evaporation induced by irrigation via water conveyance.Factors associated with ET fall into either environmental or plant eco-physiological categories. Environmental factors account for at least 79% variation of ET, and the linear relationship between ET and the groundwater table(GWT) revealed the potential water use of P. euphratica forests under the non-water stress condition with the GWT less than 3 m deep.Plant eco-physiological parameters, specifically the leaf area index(LAI), have direct impact on the seasonal pattern of ET, which provides a valuable reference to the wide-area estimates of ET for riparian forests by using LAI. In conclusion,P. euphratica forests have high water use after water conveyance, which may be the result of long-term adapting to local climates and limited water availability.

关键词： evapotranspiration eddy covariance Populus euphratica Oliv. forest Heihe River Basin

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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

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生态学报 2011年第2期31卷 344-353页

作者：陈亚鹏陈亚宁徐长春李卫红付爱红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 新疆大学资源与环境科学学院乌鲁木齐830046

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... 详细信息

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

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Effects of temperature on flowering phenological traits of Populus euphratica Oliv. and Populus pruinosa Schrenk populations, Xinjiang, China

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Journal of Arid Land 2019年第5期11卷 754-763页

作者： LI Zhijun ZHANG Xiao ZHENG Yaqiong QIU Aijun ZHANG Ling College of Life Sciences Tarim UniversityAral 843300China Key Laboratory of Protection and Utilization of Biological Resource in Tarim Basin Xinjiang Production&Construction GroupsAral 843300China

The aims of this study were to explore the interspecific differences of Populus euphratica Oliv.and Populus pruinosa Schrenk populations and the intraspecific differences of males and females within the same species in flowering phenological traits,and the effects of temperatures on flowering phenological traits in different growth years(2001–2003 and 2013–2015).The results showed that P.euphratica population flowered earlier than P.pruinosa population.Moreover,flowering phenological period of population,number of days of flowering phenological period per population,number of days of flowering phenological period per plant and average number of days of flowering period per plant of P.euphratica population were less than those of P.pruinosa population.The differences between male and female within the same species indicated that the flowering periods of males P.euphratica and P.pruinosa populations were earlier than those of female plants.For both species,flowering phenological traits were significantly and negatively correlated with the average temperatures in previous ten days,previous one month and previous three months of flowering.Both species are sensitive to temperature changes and adjust to the changes by advancing the start of flowering and prolonging the duration of flowering.

关键词： Populus euphratica Oliv. Populus pruinosa Schrenk flowering phenology temperature flowering synchrony

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Nighttime transpiration of Populus euphratica during different phenophases

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Journal of Forestry Research 2019年第2期30卷 435-444页

作者： Chunyan Zhao Jianhua Si Qi Feng Tengfei Yu Peidu Li Michael A.Forster Northwest Institute of Eco-Environment and Resources Chinese Academy of Sciences University of Chinese Academy of Sciences Key Laboratory of Ecohydrology of Inland River Basin Chinese Academy of Sciences School of Agriculture and Food Science The University of Queensland

Evidence exists of nighttime transpiration and its potential impact on plant/water relations for species in a diversity of ecosystems. However, relevant data related to typical desert riparian forest species remains limited Accordingly, we measured sap flow velocity of Populus euphratica using the heat ratio method between 2012 and2014. Nocturnal stem sap flow was separated into nighttime and stem refilling using the ‘‘forecasted refilling''method. Nighttime transpiration was observed for each phenophase. The highest value was during the full foliation period but lowest during leaf expansion and defoliation periods. The contribution of nighttime transpiration to daytime transpiration was an average of 15% but this was comparatively higher during the defoliation period. Relationships between nighttime transpiration, vapor pressure deficits, and air temperatures were more closely associated than with wind speed in all phenophases. Moreover, we found that nighttime transpiration linearly correlated to vapour pressure deficit during the first and the full foliation periods, but nighttime transpiration showed exponential correlations to air temperatures during the same phenophases. Additionally, environmental drivers of transpiration were significantly different between nighttime and daytime(P \ 0.05). Driving forces behind nighttime transpiration were characterized by many factors, and integrated impacts between these multiple environmental factors were complex. Future studies should focus on these integrated impacts on nighttime transpiration, and the physiological mechanisms of nighttime transpiration should be investigated, given that this could also influence its occurrence and magnitude during different phenophases.

关键词： Sap flow Nighttime transpiration Phenophase Heat ratio method Populus euphratica

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胡杨核转录因子PeNF-YB1克隆及其干旱响应表达

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中国农学通报 2012年第19期28卷 6-11页

作者：严东辉汤沙夏新莉尹伟伦北京林业大学生物科学与技术学院北京100083 中国林业科学研究院森林生态环境与保护研究所/国家林业局森林保护重点实验室北京100091

为阐明木本植物中核转录Y因子B亚基蛋白(NF-YB)及其编码基因在抗旱转录调控中的机制,运用生物信息学知识和方法,采用PCR克隆技术,以模式树种毛果杨基因组核转录Y因子B亚基蛋白同源序列为参考,从胡杨叶组织基因组材料中反转录获取了核酸... 详细信息

为阐明木本植物中核转录Y因子B亚基蛋白(NF-YB)及其编码基因在抗旱转录调控中的机制,运用生物信息学知识和方法,采用PCR克隆技术,以模式树种毛果杨基因组核转录Y因子B亚基蛋白同源序列为参考,从胡杨叶组织基因组材料中反转录获取了核酸长度为543bp的目标基因PeNF-YB1。该基因编码的蛋白具有螺旋-环-螺旋二级结构,含有NF-YB蛋白保守结构域和功能氨基酸,不含核定位信号肽;GFP亚细胞定位表明该基因在核中表达;PEG6000溶液干旱胁迫下,该基因表达具有早期上调、延后转为下调的响应变化。研究认为克隆的PeNF-YB1是植物NF-YB亚基基因家族成员,并在干旱早期响应过程中起转录表达作用。研究结果不仅说明了NF-YB转录因子在木本植物中的抗旱作用,也为树木抗旱调控机制的阐明提供了重要参考。

关键词： PeNF-YB1 转录因子 Populus euphratica PEG 干旱

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塔里木河干流胡杨和柽柳根际土壤微生物及其垂直分布

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干旱区研究 2008年第2期25卷 183-189页

作者：马晓梅尹林克陈理新疆农业大学新疆乌鲁木齐830052 中国科学院吐鲁番沙漠植物园新疆吐鲁番838008

对塔里木河干流阿拉干、英苏、喀尔达依等地的胡杨（Populus euphratica）、柽柳（Tamarix sp．）的根际微生物进行了研究。结果显示：①不同种植物之间，细菌、真菌和放线菌的比例不同。胡杨和柽柳的根际细菌、真菌、放线菌的数量大小... 详细信息

对塔里木河干流阿拉干、英苏、喀尔达依等地的胡杨（Populus euphratica）、柽柳（Tamarix sp．）的根际微生物进行了研究。结果显示：①不同种植物之间，细菌、真菌和放线菌的比例不同。胡杨和柽柳的根际细菌、真菌、放线菌的数量大小次序为：细菌〉放线菌〉真菌。②胡杨和柽柳根际微生物总数及各类群数量垂直变化规律为：在60～100cm土层中呈现递减趋势，在100—160cm随深度的增加逐渐增加，并达到峰值，然后随土层的加深而递减。③胡杨和柽柳在根际细菌、真菌和放线菌的数量上均存在极显著差异。胡杨根际微生物总量为柽柳的2倍，胡杨的根际细菌、真菌和放线菌的数量分别是柽柳的2倍、8倍和2倍。④胡杨和柽柳的根系在不同的深度，根际的细菌、真菌和放线菌的数量不同，随着土壤有机质含量、pH值和含水量的变化而变化。

关键词：胡杨Populus euphratica 柽柳Tamarix sp. 根际土壤微生物垂直分布塔里木河新疆

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不同去趋势方法对格尔木地区胡杨宽度年表的气候意义影响分析

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沙漠与绿洲气象 2016年第1期10卷 54-58页

作者：秦莉尚华明苏佳佳袁玉江喻树龙张同文陈峰范子昂中国气象局乌鲁木齐沙漠气象研究所中国气象局树木年轮理化研究重点实验室新疆树木年轮生态实验室新疆乌鲁木齐830002 兰州大学资源环境学院西部环境教育部重点实验室甘肃兰州730000

基于2014年采自柴达木盆地南缘格尔木地区的胡杨树轮样本,采用三种不同去趋势方法(样条函数法、负指数拟合和区域曲线去趋势方法)建立树轮标准化序列,结合格尔木气象站气候资料,分析不同去趋势方法下胡杨径向生长对气候的响应。研究表明... 详细信息

基于2014年采自柴达木盆地南缘格尔木地区的胡杨树轮样本,采用三种不同去趋势方法(样条函数法、负指数拟合和区域曲线去趋势方法)建立树轮标准化序列,结合格尔木气象站气候资料,分析不同去趋势方法下胡杨径向生长对气候的响应。研究表明,利用区域去趋势方法建立的树轮年表包含有较多的气候环境信息,胡杨树轮年表与逐月气候因子相关表明,树轮年表对降水响应不显著,与生长季的平均气温和平均最高气温有较好的相关性,最高相关系数达0.411(p<0.01),格尔木胡杨树轮的区域去趋势年表与组合相关的6—10月平均最高气温相关性最好,生长季的平均最高气温对胡杨径向生长有一定的限制作用并具有树木生理学意义。用区域曲线去趋势方法得出的格尔木胡杨树轮年表对气候的响应最好。

关键词：树木年轮胡杨(Populus euphratica oliv.) 去趋势方法气候响应

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巴丹吉林沙漠西南缘胡杨径向生长对气候的响应

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沙漠与绿洲气象 2016年第2期10卷 77-81页

作者：秦莉尚华明苏佳佳袁玉江张同文喻树龙范子昂陈峰中国气象局乌鲁木齐沙漠气象研究所中国气象局树木年轮理化研究重点开放实验室新疆树木年轮生态实验室新疆乌鲁木齐830002 兰州大学资源环境学院西部环境教育部重点实验室甘肃兰州730000

利用2014年采自巴丹吉林沙漠西南缘的胡杨样本,建立了该地区胡杨树轮宽度年表,选用相关函数法结合高台气象站历年逐月降水和温度(月平均气温、月平均最高气温、月平均最低气温)等主要气候因子,分析巴丹吉林沙漠西南缘胡杨树轮对气候的响... 详细信息

利用2014年采自巴丹吉林沙漠西南缘的胡杨样本,建立了该地区胡杨树轮宽度年表,选用相关函数法结合高台气象站历年逐月降水和温度(月平均气温、月平均最高气温、月平均最低气温)等主要气候因子,分析巴丹吉林沙漠西南缘胡杨树轮对气候的响应;研究表明,黑泉乡胡杨树轮宽度标准化年表与生长季平均气温相关较好,具有明显的正相关关系。而生长季3—9月的平均气温与胡杨树轮宽度年表的相关高达0.629(P<0.0001),3—9月的平均气温可能是该地区胡杨树木径向生长的主要限制性因子且具有明确的树木生理学意义。

关键词：树木年轮径向生长巴丹吉林沙漠气候变化胡杨(Populus euphratica Oliv.)

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Response of the accumulation of proline in the bodies of Populus euphratica to the change of groundwater level at the lower reaches of Tarim River

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Chinese Science Bulletin 2003年第18期48卷 1995-1999页

作者： Yaning Chen Yapeng Chen Weihong Li Hongfeng Zhang Chinese Acad Sci Xinjiang Inst Ecol & Geog Urumqi 830011 Peoples R China

The content of proline in the plant bodies is closely related to the converse-succession-resistant capability of the plants. In this paper, the relationship between the proline accumulation in the bodies of Populus euphratica and the change of groundwater level is analyzed by taking Popu-lus euphratica, the main community-building species of the desert riparian forests along the Tarim River, as the research object. The research results show that the accumulation of proline in the bodies of Populus euphratica is closely related to the change of groundwater level gradient under drought stress, it increases with the drawdown of groundwater level and the increase of moisture stress degree; the accumulation of proline in the bodies of Populus euphratica has two ex-tremely high points at the groundwater depth ranges of 3.64—5.14 m and 9.46—10.16 m. Combining the field investiga-tion and the analysis of the plots, it is considered that the groundwater level of 3.5—4.5 m is rational for the growth of Populus euphratica. The stress groundwater depth for the normal growth and the critical one for the survival of Popu-lus euphratica are below 4.5 m and 9—10 m respectively at the lower reaches of the Tarim River.

关键词： Populus euphratica proline groundwater level drought stress Tarim River.

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