Investigation of the controlled factors influencing carbon isotope composition of foxtail and common millet on the Chinese Loess Plateau

IVPP-IR > 中科院古脊椎所（2000年以后）

	Investigation of the controlled factors influencing carbon isotope composition of foxtail and common millet on the Chinese Loess Plateau
	Yang Qing 1,2; Li XiaoQiang 1
	2015-12-01
发表期刊	SCIENCE CHINA-EARTH SCIENCES
卷号	58 期号:12 页码:2296-2308
文章类型	Article
摘要	To apply carbon isotope composition (delta C-13) analyses of C-4 plants to the quantitative reconstruction of paleoclimate, the functional mechanism linking plant delta C-13 (delta C-13(p)) to the environment, which is based on the plants' physiological characteristics and morphological adaptability, must be thoroughly understood. Foxtail millet (Setaria italic) and common millet (Panicum miliaceum), as C-4 plants, are representative crops of the rain-fed agriculture present in northern China. Fossil millets are ideal for paleoclimatic studies because of the ease of acquisition and identification to the species level. Modern seeds of foxtail and common millet collected from different habitats of the Chinese Loess Plateau, and their carbon isotope compositions, were analyzed and correlated with environmental factors, such as latitude, altitude, temperature, precipitation, water availability, and relative humidity. The results showed that the delta C-13 of foxtail millet had a significantly negative correlation with latitude (R=-0.46), which may indicate the influence of light. The effect of light on the delta C-13 of foxtail millet accounted for only 21% of variability, while other climatic factors did not exert significant influences. Thus, the delta C-13 of foxtail millet was not suitable for extracting climatic information. The delta C-13 of common millet was significantly and positively correlated with precipitation during the growing period (R=0.75), explaining 56% of variability. The functional mechanisms analyzed, using the plants' physiological characteristics and morphological adaptability, indicated that common millet can adapt to environmental changes because of stomatal sensitivity and some non-stomatal factors. Therefore, the delta C-13 of common millet can record precipitation during growth and is a promising factor for paleoclimatic reconstruction.
关键词	Foxtail Millet Common Millet Stable Carbon Isotope Water Availability C-4 Plant Physiological Characteristics
WOS标题词	Science & Technology ; Physical Sciences
关键词[WOS]	WATER-USE EFFICIENCY ; RAINFALL GRADIENT ; STABLE-ISOTOPES ; C-4 GRASSES ; ATMOSPHERIC CO2 ; STOMATAL CONDUCTANCE ; NITROGEN NUTRITION ; HERBACEOUS PLANTS ; VEGETATION CHANGE ; ORGANIC-MATTER
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000365769400017
引用统计
文献类型	期刊论文
条目标识符	http://119.78.100.205/handle/311034/7176
专题	中科院古脊椎所（2000年以后）
作者单位	1.Chinese Acad Sci, Inst Vertebrate Paleontol & Paleoanthropol, Key Lab Vertebrate Evolut & Human Origins, Beijing 100044, Peoples R China 2.Nanjing Normal Univ, Sch Geog Sci, State Key Lab Cultivat Base Geog Environm Evolut, Nanjing 210023, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Yang Qing,Li XiaoQiang. Investigation of the controlled factors influencing carbon isotope composition of foxtail and common millet on the Chinese Loess Plateau[J]. SCIENCE CHINA-EARTH SCIENCES,2015,58(12):2296-2308.
APA	Yang Qing,&Li XiaoQiang.(2015).Investigation of the controlled factors influencing carbon isotope composition of foxtail and common millet on the Chinese Loess Plateau.SCIENCE CHINA-EARTH SCIENCES,58(12),2296-2308.
MLA	Yang Qing,et al."Investigation of the controlled factors influencing carbon isotope composition of foxtail and common millet on the Chinese Loess Plateau".SCIENCE CHINA-EARTH SCIENCES 58.12(2015):2296-2308.

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