干旱区生态环境知识资源中心(Arid): Comparison of anatomical structure and photosynthetic characteristics between the two photosynthetic organs of the desert plant Hedysarum scoparium

Arid

	Comparison of anatomical structure and photosynthetic characteristics between the two photosynthetic organs of the desert plant Hedysarum scoparium
	Yan, QiaoDi; Su, Peixi; Gao, Song
通讯作者	Yan, QD
来源期刊	SCIENCES IN COLD AND ARID REGIONS
ISSN	1674-3822
出版年	2010
卷号	2 期号:3 页码:241-249
英文摘要	The desert plant Hedysarum scoparium uses leaflets and rachises as its photosynthetic organs. The abundance of leaflets was lower under unfavorable environmental conditions and higher with improved water conditions. To examine the characteristics associated with the adaptation of H. scoparium to its environment, we selected plants with both compound leaves and rachis without leaflets to study the anatomical structures and gas exchange characteristics of the two organs. The results show that the water storage tissues in rachises were more developed compared with the leaflets. The diurnal courses of the net photosynthetic rate for the rachis and the leaflet were both in a bimodal pattern. Meanwhile, both two peak values of the rachis were significantly higher than those of the leaflet. The daily average transpiration rate was significantly higher in the rachis than in the leaflet in order to lower the temperature of the rachises. It was concluded that under desert drought conditions, the leaflets of H. scoparium were partially or completely degraded to reduce the transpiration area as an adaptive response to water deficit, and only the rachises were retained as photosynthetic organ. The rachises were found to be better suited to a desert habitat than the leaflets.
英文关键词	anatomical structure desert plant Hedysarum scoparium photosynthesis photosynthetic organ
类型	Article
语种	英语
收录类别	ESCI
WOS记录号	WOS:000422276300008
WOS类目	Geography, Physical
WOS研究方向	Physical Geography
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/2XILL650/329565
作者单位	[Yan, QiaoDi; Su, Peixi; Gao, Song] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lab Plant Stress Ecophysiol & Biotechnol, Linze Inland River Basin Res Stn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Yan, QiaoDi,Su, Peixi,Gao, Song. Comparison of anatomical structure and photosynthetic characteristics between the two photosynthetic organs of the desert plant Hedysarum scoparium[J]. 中国科学院西北生态环境资源研究院,2010,2(3):241-249.
APA	Yan, QiaoDi,Su, Peixi,&Gao, Song.(2010).Comparison of anatomical structure and photosynthetic characteristics between the two photosynthetic organs of the desert plant Hedysarum scoparium.SCIENCES IN COLD AND ARID REGIONS,2(3),241-249.
MLA	Yan, QiaoDi,et al."Comparison of anatomical structure and photosynthetic characteristics between the two photosynthetic organs of the desert plant Hedysarum scoparium".SCIENCES IN COLD AND ARID REGIONS 2.3(2010):241-249.