干旱区生态环境知识资源中心(Arid): 科尔沁沙丘-草甸相间地区黄柳和小叶锦鸡儿光合速率对光照强度和CO

Arid

	科尔沁沙丘-草甸相间地区黄柳和小叶锦鸡儿光合速率对光照强度和CO_2浓度的响应
其他题名	Response of photosynthetic rate of Salix gordejevii and Caragana microphylla to light intensity and C0_2 concentration in the dune-meadow transitional area of Horqin sandy land
	吕扬; 刘廷玺; 闰雪; 段利民; 张圣微; 韩春雪
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2016
卷号	35 期号:12 页码:3157-3164
中文摘要	本文采用Li-6400光合作用仪对科尔沁沙丘-草甸相间地区固定沙丘低洼部位的小叶锦鸡儿(Caragana microphylla Lam.)群落和半流动沙丘阴坡上部的黄柳(Salix gordejeuii Chang et Skv.)群落进行光响应曲线和CO_2响应曲线的测定,然后通过直角双曲线模型、非直角双曲线模型、直角双曲线修正模型3种拟合模型对两种植物光合-光/CO_2响应曲线进行拟合分析。结果表明:直角双曲线修正模型能更好地拟合植物光合速率随光强和CO_2浓度变化的真实情况,并且计算出的最大净光合速率、光饱和点、CO_2饱和点等光合参数都与实测值最接近;受不同生境的影响,两种植物的光合特性参数存在差异,小叶锦鸡儿存在较高的光饱和点(LSP)和较低的光补偿点(LCP),表现出对环境较强的适应能力,而黄柳的表观量子效率大于小叶锦鸡儿,所以对光能的转化效率高,低的暗呼吸速率使小叶锦鸡儿消耗更少的光合产物;在CO_2饱和情况下,小叶锦鸡儿和黄柳的最大净光合速率(P(_n max))分别达到了44.5、29.7 mumol ·m~(-2)·s~(-1), 为光饱和下的3.98和1.87倍。CO_2浓度高的生境更能促进黄柳生长,而小叶锦鸡儿在较低的CO_2浓度下能进行光合作用形成有机物的积累,同时小叶锦鸡儿有较高的羧化效率,表现出较强的CO_2同化能力。
英文摘要	The light response curves and CO_2 response curves of Caragana microphylla and Salix gordejevii in the dune-meadow transitional area of Horqin sandy land were measured using a Li-6400XT portable photosynthesis system. The measured data were fitted using a rectangular hyperbola model,a non-rectangular hyperbola model, and a modified rectangular hyperbola model of the photosynthetic response to light and intercellular CO_2 concentration, respectively. The results showed that the modified rectangular hyperbola model could better fit the light response and CO_2 response curves. However, there were significant differences in photosynthetic characteristic parameters between the two plants, due to the effects of the desert environment. C. microphylla showed a lower light compensation point and CO-2 compensation point, but a higher light saturation point than S. gordejevii. This suggested that C. microphylla had a stronger ability to adapt to the environment. The apparent quantum yield of S. gordejevii was greater than that of C. microphylla, which indicated that S. gordejevii had a high conversion efficiency of light energy. In addition, C. microphylla presented a lower rate of dark respiration than that of S. gordejevii. When the CO_2 concentration reached saturation, the maximum net photosynthetic rates of C. microphylla and S. gordejevii were 44.5 and 29.7 mumol · m~(-2) · s~(-2) respectively, which were 3.98 and 1.87 times of those under saturation light. A habitat with high CO_2 concentration promoted the growth of S. gordejevii,while C. microphylla formed the accumulation of organic matter at a lower CO_2 concentration. At the same time, C. microphylla had high efficiency of carboxylation and a strong ability of CO_2 assimilation.
中文关键词	小叶锦鸡儿 ; 黄柳 ; 光响应曲线 ; C02响应曲线 ; 拟合模型
英文关键词	Caragana microphylla Salix gordejevii photosynthetic response curve CO_2 response curve fitting model
语种	中文
国家	中国
收录类别	CSCD
WOS类目	BIOLOGY
WOS研究方向	Life Sciences & Biomedicine - Other Topics
CSCD记录号	CSCD:5867942
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/234875
作者单位	内蒙古农业大学水利与土木建筑工程学院, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	吕扬,刘廷玺,闰雪,等. 科尔沁沙丘-草甸相间地区黄柳和小叶锦鸡儿光合速率对光照强度和CO_2浓度的响应[J]. 内蒙古农业大学,2016,35(12):3157-3164.
APA	吕扬,刘廷玺,闰雪,段利民,张圣微,&韩春雪.(2016).科尔沁沙丘-草甸相间地区黄柳和小叶锦鸡儿光合速率对光照强度和CO_2浓度的响应.生态学杂志,35(12),3157-3164.
MLA	吕扬,et al."科尔沁沙丘-草甸相间地区黄柳和小叶锦鸡儿光合速率对光照强度和CO_2浓度的响应".生态学杂志 35.12(2016):3157-3164.