干旱区生态环境知识资源中心(Arid): 沙木蓼和沙枣对地下水位变化的生理生态响应Ⅱ．叶片光合作用及其对温度和光的反应

Arid

	沙木蓼和沙枣对地下水位变化的生理生态响应Ⅱ．叶片光合作用及其对温度和光的反应
其他题名	Ecophysiological responses of two xerophytes atraphaxis frutescens and elaeagnus angustifolia to the change of groundwater depth in arid area II. leaf photosynthesis and photosynthetic response to light and temperature
	刘世荣 1; 赵广东 1; 马全林2
来源期刊	植物生态学报
ISSN	1005-264X
出版年	2003
卷号	27 期号:2 页码:223-227
中文摘要	在甘肃民勤沙生植物园内，研究了两种优势旱生植物沙木蓼（Atraphaxis frutescens)和沙枣（Elaeagnus angustifolia)的光合生理等特性对不同地下水深度（1.4-3.4m)的响应，结果表明：1）地下水深度的变化导致了这两种旱生植物净光合速率（Pn）、蒸腾速率（E）、气孔导（Gs）、叶绿素a、叶绿素b、叶绿素总量、叶绿素a、叶绿素b的比值，光量子效率、CO2羧化效率等的显著变化；2）两种植物均能较好地适应地下水深度为3.4m的水分胁迫；3）两种植物对地下水深度变化的适应方式略有不同，沙木蓼主要通过一定程度地净光合速率的降低。并保持一定的水分利用率来适应干旱，而沙枣则通过净光合速率的较大幅度降低以增加其水分利用率来适应干旱；4）地下水深度的变化并未导致两种植物光合作用适宜温度的明显变化，但却引起了在适宜温度下净光合速率的显著下降，沙棘是非豆科固氮植物，两者的差异是否与固氮作用相关还有待进一步研究。
英文摘要	The eco-physiological responses of dominant trees ( Atraphaxis frutescens and Eloeognus angustifolia) to ground water availability were investigated in a controlled environment at the Plant Transpiration Consume Water Observation Station in Minqin Desert Botanical Garden, Gansu province. In this experiment, the depths of groundwater (DGW) were designed as 1.4m, 2.4m and 3.4m. In each treatment, the two desert species were transplanted to the observation sites with different DGW after growing naturally for 3 or 4 years. The results showed that: 1) the changes of DGW resulted in the significant changes of net photosynthetic rate (Pn) , the transpiration rate ( E), stomatal conductance ( Gs ), leaf contents of chlorophyll a ( Chi a), chlorophyll b (Chl b) and the total chlorophyll (Chi a + Chl b), the ratio of Chi a and Chi b (Chi a/Chl b), the quantum yield efficiency and the CO_2 carboxylation efficiency; 2) although these two desert species were well adapted to the water stress environment at 3.4 m DGW, their adaptive strategies were different. In response to the water stress environment, A. frutescens reduced its photosynthetic rate and maintained the level of water use efficiency, while E. angustifolia largely decreased the transpiration rate and thus increased the water use efficiency; 3) in different DGW, the optimal temperature of photosynthesis in these two desert species did not change significantly, but the net photosynthetic rate under the optimal temperature range declined markedly. Since E. angustifolia is a nitrogen fixation species, further studies are needed to verify whether or not the differences of drought adaptation between these two species are related to the nitrogen fixation.
中文关键词	沙木蓼 ; 沙枣 ; 温度 ; 光 ; 地下水深度 ; 早生植物 ; 光合生理 ; 响应
英文关键词	Depth of groundwater Xerophilous plant Photosynthetic physiology Response
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:1280597
来源机构	甘肃省治沙研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204563
作者单位	1.中国林业科学研究院森林生态环境与保护研究所, 北京 100091, 中国; 2.甘肃省治沙研究所, 武威, 甘肃 733000, 中国
推荐引用方式 GB/T 7714	刘世荣,赵广东,马全林. 沙木蓼和沙枣对地下水位变化的生理生态响应Ⅱ．叶片光合作用及其对温度和光的反应[J]. 甘肃省治沙研究所,2003,27(2):223-227.
APA	刘世荣,赵广东,&马全林.(2003).沙木蓼和沙枣对地下水位变化的生理生态响应Ⅱ．叶片光合作用及其对温度和光的反应.植物生态学报,27(2),223-227.
MLA	刘世荣,et al."沙木蓼和沙枣对地下水位变化的生理生态响应Ⅱ．叶片光合作用及其对温度和光的反应".植物生态学报 27.2(2003):223-227.