干旱区生态环境知识资源中心(Arid): 地下水位对胡杨(Populus euphratica)和灰胡杨(Populus pruinosa)叶绿素荧光光响应与光合色素含量的影响

Arid

	地下水位对胡杨(Populus euphratica)和灰胡杨(Populus pruinosa)叶绿素荧光光响应与光合色素含量的影响
其他题名	Effects of Groundwater Levels on Photosynthetic Pigments and Light Response of Chlorophyll Fluorescence Parameters of Populus euphratica and Populus pruinosa
	王海珍 1; 陈加利 2; 韩路 1; 徐雅丽 2; 贾文锁 3
来源期刊	中国沙漠
ISSN	1000-694X
出版年	2013
卷号	33 期号:4 页码:1054-1063
中文摘要	在塔里木河上游利用便携式调制叶绿素荧光仪研究了地下水位对胡杨(Populus pruinosa)和灰胡杨(Populus pruinosa)光合色素和叶绿素荧光光响应的影响。结果表明:不同地下水位环境下,2树种表观光合电子传递速率(ETR)、非光化学猝灭系数(NPQ)、PSⅡ激发能压力(1-qP)、天线色素热耗散能量(D)、非光化学反应耗散能量(E)、光合功能相对限制值(PED)和光系统间激发能分配不平衡偏离系数(beta/alpha-1)随光合有效辐射(PAR)增加而升高,PSⅡ实际光化学效率(Phi_(PSⅡ))、光化学猝灭系数(qP)和光化学反应能量(P)则随PAR增加而降低;相同光强下,地下水位下降导致胡杨和灰胡杨叶片含水量、最大电子传递速率(ETR_(max))、光化学反应启动速率(theta)、ETR、Phi_(PSⅡ)、qP、P与叶绿素(Chla、Chlb、Chl(a+b))和类胡萝卜素(Car)含量降低,而使Chla/b、NPQ、D、E、PED、1-qP、beta/alpha-1明显升高;地下水位下降显著影响2树种叶绿素荧光光响应参数,引起光能吸收、传递与分配改变,致使光合效率降低;地下水位下降对灰胡杨光合生理过程的影响程度明显高于胡杨,表明胡杨对荒漠逆境的适应性强于灰胡杨。逆境下胡杨通过维持相对较高的ETR、ETR_(max)、theta、Phi_(PSⅡ)、qP、P值,并通过增强非辐射性热耗散来调节自身能量代谢,以此来保护光合机构正常运转,这是胡杨长期适应干旱荒漠逆境而形成的一种自我调节机制。
英文摘要	Photosynthetic pigments and light response curves of chlorophyll fluorescence parameters in leaves of Populus euphratica and Poulus pruinosa, living with different groundwater depths (2.5 m, 3.5 m and 5.0 m) in the upper reaches of Tarmi River, were measured with a portable fluorometer. The results showed that chlorophyll fluorescence parameters of light response curves of P.euphratica and P.pruinosa, such as photosynthetic electron transport rate(ETR), non-photochemical quenching(NPQ), excitation pressure (1-qP), the ratio of antenna thermal dissipation (D), excess excited energy(E),relative limitation of photosynthesis(PED),the deviation from full balance between PSⅠand PSⅡ(beta/alpha-1) increased with increasing photosynthetic active radiation(PAR), but PSⅡactual photochemical efficiency(Phi_(PSⅡ)), photochemistry quenching (qP) and the ratio of absorbed light in photochemistry(P) decreased with increasing PAR under different groundwater levels in arid desert environment. The decrease of groundwater levels led to decrease in leaf water content, maximum electron transport rate (ETR_(max)), initial slope rate of photochemical reaction(theta), ETR, Phi_(PSⅡ), qP, P and leaf content of chlorophyll a (Chla), leaf content of chlorophyll b (Chlb), total chlorophyll (Chla+Chlb), carotenoids, but it led to increase obviously in the ratio of Chla to Chlb (Chla/Chlb), NPQ, D, E, PED, 1-qP, beta/alpha-1 under the same light intensity. The decrease of groundwater levels influenced significantly the chlorophyll fluorescence parameters of light response curves of two tree species, and it led to changes in light energy absorption, transfer and allocation, further to decrease the photosynthetic efficiency. Greater decreases occurred with the deeper groundwater level and P. pruinosa declined more than P. euphratica, it showed P. euphratica were better ecological adaptation to desert environment than P. pruinosa. P. euphratica could maintain relative high ETR, ETR_(max), theta, Phi_(PSⅡ), qP, P and enhanced radiationless energy dissipation to adjust itself energy metabolism, in order to protect the photosynthetic apparatus to operate normally, which was a self-adjustment mechanism of long adaptation to arid desert environment.
中文关键词	胡杨(Populus euphratica) ; 灰胡杨(Populus pruinosa) ; 地下水位 ; 光合色素 ; 叶绿素荧光 ; 光响应曲线
英文关键词	Populus euphratica Poulus pruinosa groundwater level photosynthetic pigment chlorophyll fluorescence light response curves
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:4895055
来源机构	中国农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230628
作者单位	1.塔里木大学植物科学学院, 新疆省生产建设兵团塔里木盆地生物资源保护利用重点实验室, 阿拉尔, 新疆 843300, 中国; 2.塔里木大学植物科学学院, 阿拉尔, 新疆 843300, 中国; 3.中国农业大学农学与生物技术学院, 北京 100139, 中国
推荐引用方式 GB/T 7714	王海珍,陈加利,韩路,等. 地下水位对胡杨(Populus euphratica)和灰胡杨(Populus pruinosa)叶绿素荧光光响应与光合色素含量的影响[J]. 中国农业大学,2013,33(4):1054-1063.
APA	王海珍,陈加利,韩路,徐雅丽,&贾文锁.(2013).地下水位对胡杨(Populus euphratica)和灰胡杨(Populus pruinosa)叶绿素荧光光响应与光合色素含量的影响.中国沙漠,33(4),1054-1063.
MLA	王海珍,et al."地下水位对胡杨(Populus euphratica)和灰胡杨(Populus pruinosa)叶绿素荧光光响应与光合色素含量的影响".中国沙漠 33.4(2013):1054-1063.