干旱区生态环境知识资源中心(Arid): 四种荒漠植物的光合响应

Arid

	四种荒漠植物的光合响应
其他题名	The studies about the photosynthetic response of the four desert plants
	邓雄 1; 李小明 2; 张希明2 ; 叶万辉 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2003
卷号	23 期号:3 页码:598-605
中文摘要	研究了胡杨（Populus euphratica Oliv）、疏叶骆驼刺（Alhagi sparsifolia B.Keller et Shap)、多枝柽柳（Tamarix ramosissima Lbd)和头状沙拐枣（Calligonum caput-medusae Schrenk)等四种塔克拉玛干荒漠植物的光合响应曲线，结果表明：（1）四种植物中，疏叶骆驼刺光呼吸（Rp)和CO2补偿点（Г）最高，净光合速率（An）以及水分利用效率（WUE）最低；而C4植物头状沙拐枣无论Rp还是Г都最低，它的An、光补偿点（LCP）及光饱和点（LSP）都显著高于其它3种植物（P≤0．05），而且因为非常低的蒸腾速率（E），沙拐枣的WUE也较高。（2）4种植物都为喜光植物，但仍然表现出一定的差异。根据它们光曲线中LCP以及暗呼吸速率（Rd)，4种喜光植物的喜光顺序为：头状沙拐枣，疏叶骆驼枣刺，多枝柽柳，胡杨。（3）柽柳光合响应曲线与日变化中的An,gs等值差异较大，可能是该植物的温度生态位较其它三种植物范围较窄，设置的25℃不在其最适温度范围内，或者是在这个温度下气孔对光强变化的不敏感。（4）综合前人的结果表明，在特定的环境条件，发育阶段以及经过一定的诱导处理，胡杨可以因诱导而表现出一些C4植物特征。
英文摘要	Pnpulus euphratica Oliv, 、Alhagi spars/folia B. Keller et Shap. 、Tamarix ramosissima Lbd. and Calligonum caput-rnedusae Schrenk. . are all constructive plants in Taklamaka Desert. Responses of photosynthetic parameters of the four desert plants to changes light intensity and CO_2 concentration were studied, the results are as follows; ① Among the four plants, A. sparsifolia has the highest photorespiration rate (R_p) and CO_2 compensation point(Г), and it has the lowest maximal net assimilation rate(A_m) and water use efficiency (WUE) in irradiance responses. On the contrary, as a C_4 plant. C.caput-medusa has a lower R_p and Г,and a significantly higher A_n, light compensation point(LCP) and light saturation point(LSP/,.) than those of the other plants (.P≤0. 05), it also had the highest WUE owed much to its very low transpiration rate(E). ②According to their LCP and respiration in dark(R_d), we arranged them from sunny to less: C. caput-medusa, A. aparsijolia, T. ramosissima o P. euphratica. And our results also favored the view that relative shade-tolerant plants have higher A_n , in weak light environment than those sun ones. ③ Further studies are expected to be done on if T. ramosissima has a narrow temperature niche or less stomata sensitivity to irradiance than the other plants. ④Having present a striking contrast between the previously reported results and ours, we suggest P. populus could be inducible for some C_4-like characteristics in some special environments, growth stages or under some special treatments.
中文关键词	荒漠植物 ; 光合响应曲线 ; C4植物
英文关键词	desert plants photosynthetic response curves C_4, plants
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:1281113
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204276
作者单位	1.中国科学院华南植物研究所, 广州, 广东 510650, 中国; 2.中国科学院新疆生态与生理研究所, 乌鲁木齐, 新疆 830011, 中国
推荐引用方式 GB/T 7714	邓雄,李小明,张希明,等. 四种荒漠植物的光合响应[J]. 中国科学院新疆生态与地理研究所,2003,23(3):598-605.
APA	邓雄,李小明,张希明,&叶万辉.(2003).四种荒漠植物的光合响应.生态学报,23(3),598-605.
MLA	邓雄,et al."四种荒漠植物的光合响应".生态学报 23.3(2003):598-605.