Stable carbon and nitrogen isotope signatures of root-holoparasitic Cynomorium songaricum and its hosts at the Tibetan plateau and the surrounding Gobi desert in China

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	Stable carbon and nitrogen isotope signatures of root-holoparasitic Cynomorium songaricum and its hosts at the Tibetan plateau and the surrounding Gobi desert in China
	Yang, Yueqin 1,2,3; Yi, Xianfeng 3; Peng, Min 1; Zhou, Yubi 1
	2012
发表期刊	ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES
ISSN	1025-6016
卷号	48 期号:4 页码:483-493
文章类型	Article
摘要	We first measured the delta C-13 and delta N-15 values of root holoparasite Cynomorium songaricum and its hosts from 19 sites across four provinces in northwest China, in an attempt to investigate their nutritional relationship at the Tibetan plateau and the surrounding Gobi desert. Our study showed that the delta C-13 of C. songaricum closely mirrored the values of its hosts, Nitraria tangutorum and N. sibirica across all sampling sites. C. songaricum was significantly depleted in C-13 compared to host plants at the Tibetan plateau, showing an average parasite/host delta C-13 difference of -0.6 %. In contrast, N-15 of C. songaricum was significantly enriched by +1.3% compared to the hosts, implying that these holoparasites had other nitrogen resources. Although no difference in the delta C-13 and delta N-15 values between holoparasites and hosts was detected, the delta C-13 and delta N-15 values of holoparasites were significantly correlated with those of their hosts at the Gobi desert. The delta C-13 versus delta N-15 values were significantly but negatively correlated for the hosts; however, holoparasite/host variation in delta C-13 was not correlated with the variation in delta N-15. The delta C-13 versus delta N-15 values were negatively correlated in C. songaricum, and this relationship tended to be magnified along the increasing elevations independent of the host plants. C. songaricum at the Tibetan plateau exhibited different delta C-13 and delta N-15 signatures compared with those at the Gobi desert. Furthermore, both delta C-13 and delta N-15 values of C. songaricum and its host plants in salt marshes at the Tibetan plateau were different from those in sand sites at the Tibetan plateau and the Gobi desert. Our results indicate that the isotopic difference depends on the different altitudes and habitats and is host-specific.; We first measured the delta C-13 and delta N-15 values of root holoparasite Cynomorium songaricum and its hosts from 19 sites across four provinces in northwest China, in an attempt to investigate their nutritional relationship at the Tibetan plateau and the surrounding Gobi desert. Our study showed that the delta C-13 of C. songaricum closely mirrored the values of its hosts, Nitraria tangutorum and N. sibirica across all sampling sites. C. songaricum was significantly depleted in C-13 compared to host plants at the Tibetan plateau, showing an average parasite/host delta C-13 difference of -0.6 %. In contrast, N-15 of C. songaricum was significantly enriched by +1.3% compared to the hosts, implying that these holoparasites had other nitrogen resources. Although no difference in the delta C-13 and delta N-15 values between holoparasites and hosts was detected, the delta C-13 and delta N-15 values of holoparasites were significantly correlated with those of their hosts at the Gobi desert. The delta C-13 versus delta N-15 values were significantly but negatively correlated for the hosts; however, holoparasite/host variation in delta C-13 was not correlated with the variation in delta N-15. The delta C-13 versus delta N-15 values were negatively correlated in C. songaricum, and this relationship tended to be magnified along the increasing elevations independent of the host plants. C. songaricum at the Tibetan plateau exhibited different delta C-13 and delta N-15 signatures compared with those at the Gobi desert. Furthermore, both delta C-13 and delta N-15 values of C. songaricum and its host plants in salt marshes at the Tibetan plateau were different from those in sand sites at the Tibetan plateau and the Gobi desert. Our results indicate that the isotopic difference depends on the different altitudes and habitats and is host-specific.
关键词	Arid Area Carbon-13 Gobi Desert Holoparasites Isotope Ecology Nitrogen-15 Nutritional Relationship Plants Tibetan Plateau
WOS标题词	Science & Technology ; Physical Sciences ; Life Sciences & Biomedicine
关键词[WOS]	XYLEM-TAPPING MISTLETOES ; TRISTERIX-APHYLLUS ; PARASITIC PLANTS ; VEGETATIVE BODY ; HETEROTROPHY ; EXTRACTS ; RATIOS ; WATER ; BALANOPHORACEAE ; HEMIPARASITES
收录类别	SCI
语种	英语
WOS研究方向	Chemistry ; Environmental Sciences & Ecology
WOS类目	Chemistry, Inorganic & Nuclear ; Environmental Sciences
WOS记录号	WOS:000309283400002
引用统计	被引频次：9[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/3742
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, NW Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China 2.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China 3.Henan Univ Sci & Technol, Coll Agr, Luoyang 471000, Peoples R China
推荐引用方式 GB/T 7714	Yang, Yueqin,Yi, Xianfeng,Peng, Min,et al. Stable carbon and nitrogen isotope signatures of root-holoparasitic Cynomorium songaricum and its hosts at the Tibetan plateau and the surrounding Gobi desert in China[J]. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,2012,48(4):483-493.
APA	Yang, Yueqin,Yi, Xianfeng,Peng, Min,&Zhou, Yubi.(2012).Stable carbon and nitrogen isotope signatures of root-holoparasitic Cynomorium songaricum and its hosts at the Tibetan plateau and the surrounding Gobi desert in China.ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES,48(4),483-493.
MLA	Yang, Yueqin,et al."Stable carbon and nitrogen isotope signatures of root-holoparasitic Cynomorium songaricum and its hosts at the Tibetan plateau and the surrounding Gobi desert in China".ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES 48.4(2012):483-493.

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