干旱区生态环境知识资源中心(Arid): 荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征

Arid

	荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征
其他题名	Characteristic in photosynthesis,transpiration and water use efficiency of Haloxylon ammodendron and Calligonum mongolicum of desert species
	苏培玺; 赵爱芬; 张立新; 杜明武; 陈怀顺
来源期刊	西北植物学报
ISSN	1000-4025
出版年	2003
卷号	23 期号:1 页码:11-17
中文摘要	运用开放式气体交换LI-6400便携式光合作用测定系统，研究了梭梭（Haloxylon ammodendron）和沙拐枣（Calligonum mongolicum）的净光合速率（Pn）、蒸腾速率（E）及水分利用效率（WUE）特征。结果表明：梭梭和沙拐枣在湿润状况下的Pn日变化呈单峰型，梭梭低于沙拐枣，日平均分别为19.600.12mumol·m~-2·s~-1和24.060.50mumol·m~-2·s~-1；E也是梭梭低于沙拐枣，日平均分别为5.530.08mmol·m~-2·s~-1和8.210.26mmol·m~-2·s~-1；WUE则不同，日平均梭梭高于沙拐枣，分别为3.280.05mmolCO2·mol~-1H2O和2.840.06mmolCO2·mol~-1H-2O。WUE年均值也是梭梭高于沙拐枣，二者最高值都出现在9月，次高值出现在7月，WUE的高低变化与年降水量的高低分布一致。在湿润和干燥两种状况下，梭梭和沙拐枣Pn对光强的响应表明，水分条件好时Pn明显增大，光能利用率提高。从湿润状况时的净光合速率、光饱和点和CO-2补偿点，以及干燥状况时也具有低CO-2补偿点，确定梭梭和沙拐枣具有C-4光合途径。
英文摘要	Desert arid environment was differentiated moist condition and dry condition in the study. An open gas exchange system,LI-6400 Portable Photosynthesis System was used to study the characteristics of Haloxylon ammodendron (HA) and Calligonum mongolicum (CM) in photosynthetic rate (Pn) transpiration rate (E) and water use efficiency (WUE). The results showed that the daily changes of net photo-synthetic rate of HA and CM appeared as single-peak curve and Pn of HA lower than CM. Pn on daily average value of HA and CM were 19. 60+0. 12 mumol o m~-2 o s~-1 and 24. 06 + 0. 50 fimol o m~2 o s~-1 respectively. E of HA was lower than CM,E on daily average value of HA was 5. 53 + 0. 08 mmol ·mol-1·s~-1 and 8.21 + 0. 26 mmol o m~-2·s~-l in CM. WUE was different from Pn and E,WUE on daily average value of HA was higher than CM and 3. 280. 05 mmol CO-2 - mol-1 H(-2)O of HA and 2. 84 + 0. 06 mmol CO-2 ·mol-1 H(-2)0 of CM. WUE on annual average value of HA was also higher than CM and the first peak value of both species appeared in September. The second peak value of WUE on annual average value appeared in July. The annual dynamics of WUE was consistent with annual precipitation curve. Under moist and dry condition, light saturation points of HA and CM were higher when moisture condition was better. The descend reason of Pn is attributed to the non - stomatic factors. CO-2 saturation point of HA is higher than CM in this research,CO-2 saturation points of HA and CM were also higher when moisture condition was better, but difference is no significance. However, CO-2 compensation point of both species are very low. Under moist condition,Pn and light saturation points are higher than dry condition. CO-2 compensation point is lower in both moist and dry condition. Base on above these reason,we think that Haloxylon ammodendron and Calligonum mongolicum were C-4 pathway.
中文关键词	荒漠植物 ; 梭梭 ; 沙拐枣 ; 光合作用 ; 蒸腾作用 ; 水分利用效率特征
英文关键词	Haloxylon ammodendron Calligonum mongolicum photosynthesis transpiration water use efficiency C-4 pathway desert species
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:1349129
来源机构	中国科学院西北生态环境资源研究院
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/204465
作者单位	中国科学院寒区旱区环境工程研究所, 兰州 730000
推荐引用方式 GB/T 7714	苏培玺,赵爱芬,张立新,等. 荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征[J]. 中国科学院西北生态环境资源研究院,2003,23(1):11-17.
APA	苏培玺,赵爱芬,张立新,杜明武,&陈怀顺.(2003).荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征.西北植物学报,23(1),11-17.
MLA	苏培玺,et al."荒漠植物梭梭和沙拐枣光合作用、蒸腾作用及水分利用效率特征".西北植物学报 23.1(2003):11-17.