Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbizincicola

CORC > 烟台海岸带研究所 > 中国科学院烟台海岸带研究所 > 中科院海岸带环境过程与生态修复重点实验室

	Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbizincicola
	Hu, Pengjie 1; Yin, Yong-Gen 2; Ishikawa, Satoru 3; Suzui, Nobuo 2; Kawachi, Naoki 2; Fujimaki, Shu 2; Igura, Masato 3; Yuan, Cheng 1; Huang, Jiexue 1; Li, Zhu 1
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2013-09-01
卷号	20 期号:9 页码:6306-6316
关键词	Ammonium Cadmium Nitrate Positron-emitting tracer imaging system (PETIS) Sedum plumbizincicola Transport Uptake Xylem sap
ISSN号	0944-1344
其他题名	Organochlorine Pesticides in the Atmosphere and Surface Water from the Equatorial Indian Ocean Enantiomeric Signatures, Sources, and Fate.pdf
通讯作者	Wu, LH (reprint author), Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China. lhwu@issas.ac.cn
产权排序	[Hu, Pengjie; Yuan, Cheng; Huang, Jiexue; Li, Zhu; Wu, Longhua] Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China; [Yin, Yong-Gen; Suzui, Nobuo; Kawachi, Naoki; Fujimaki, Shu] Japan Atom Energy Agcy, Gunma 3701292, Japan; [Ishikawa, Satoru; Igura, Masato; Makino, Tomoyuki] Natl Inst Agroenvironm Sci, Ibaraki 3058604, Japan; [Luo, Yongming] Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China; [Christie, Peter] Agrifood & Biosci Inst, Agrienvironm Branch, Belfast BT9 5PX, Antrim, North Ireland
中文摘要	The aims of this study are to investigate whether and how the nitrogen form (nitrate (NO3 (-)) versus ammonium (NH4 (+))) influences cadmium (Cd) uptake and translocation and subsequent Cd phytoextraction by the hyperaccumulator species Sedum plumbizincicola. Plants were grown hydroponically with N supplied as either NO3 (-) or NH4 (+). Short-term (36 h) Cd uptake and translocation were determined innovatively and quantitatively using a positron-emitting Cd-107 tracer and positron-emitting tracer imaging system. The results show that the rates of Cd uptake by roots and transport to the shoots in the NO3 (-) treatment were more rapid than in the NH4 (+) treatment. After uptake for 36 h, 5.6 (0.056 mu M) and 29.0 % (0.290 mu M) of total Cd in the solution was non-absorbable in the NO3 (-) and NH4 (+) treatments, respectively. The local velocity of Cd transport was approximately 1.5-fold higher in roots (3.30 cm h(-1)) and 3.7-fold higher in shoots (10.10 cm h(-1)) of NO3 (-)- than NH4 (+)-fed plants. Autoradiographic analysis of Cd-109 reveals that NO3 (-) nutrition enhanced Cd transportation from the main stem to branches and young leaves. Moreover, NO3 (-) treatment increased Cd, Ca and K concentrations but inhibited Fe and P in the xylem sap. In a 21-day hydroponic culture, shoot biomass and Cd concentration were 1.51 and 2.63 times higher in NO3 (-)- than in NH4 (+)-fed plants. We conclude that compared with NH4 (+), NO3 (-) promoted the major steps in the transport route followed by Cd from solution to shoots in S. plumbizincicola, namely its uptake by roots, xylem loading, root-to-shoot translocation in the xylem and uploading to the leaves. S. plumbizincicola prefers NO3 (-) nutrition to NH4 (+) for Cd phytoextraction.
英文摘要	The aims of this study are to investigate whether and how the nitrogen form (nitrate (NO3 (-)) versus ammonium (NH4 (+))) influences cadmium (Cd) uptake and translocation and subsequent Cd phytoextraction by the hyperaccumulator species Sedum plumbizincicola. Plants were grown hydroponically with N supplied as either NO3 (-) or NH4 (+). Short-term (36 h) Cd uptake and translocation were determined innovatively and quantitatively using a positron-emitting Cd-107 tracer and positron-emitting tracer imaging system. The results show that the rates of Cd uptake by roots and transport to the shoots in the NO3 (-) treatment were more rapid than in the NH4 (+) treatment. After uptake for 36 h, 5.6 (0.056 mu M) and 29.0 % (0.290 mu M) of total Cd in the solution was non-absorbable in the NO3 (-) and NH4 (+) treatments, respectively. The local velocity of Cd transport was approximately 1.5-fold higher in roots (3.30 cm h(-1)) and 3.7-fold higher in shoots (10.10 cm h(-1)) of NO3 (-)- than NH4 (+)-fed plants. Autoradiographic analysis of Cd-109 reveals that NO3 (-) nutrition enhanced Cd transportation from the main stem to branches and young leaves. Moreover, NO3 (-) treatment increased Cd, Ca and K concentrations but inhibited Fe and P in the xylem sap. In a 21-day hydroponic culture, shoot biomass and Cd concentration were 1.51 and 2.63 times higher in NO3 (-)- than in NH4 (+)-fed plants. We conclude that compared with NH4 (+), NO3 (-) promoted the major steps in the transport route followed by Cd from solution to shoots in S. plumbizincicola, namely its uptake by roots, xylem loading, root-to-shoot translocation in the xylem and uploading to the leaves. S. plumbizincicola prefers NO3 (-) nutrition to NH4 (+) for Cd phytoextraction.
学科主题	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	TRACER IMAGING-SYSTEM ; THLASPI-CAERULESCENS ; ARABIDOPSIS-HALLERI ; NITROGEN FORM ; NOCCAEA CAERULESCENS ; METAL HOMEOSTASIS ; CD TRANSLOCATION ; ALFREDII HANCE ; ZINC UPTAKE ; XYLEM SAP
收录类别	SCI
资助信息	National Natural Science Foundation of China [40930739, 41201300, 41230858]; Strategic International Cooperative Program, Japanese Science and Technology Agency (JST); Japanese Society for the Promotion of Science [23380155]
原文出处	http://dx.doi.org/10.1007/s11356-013-1680-3
语种	英语
WOS记录号	WOS:000322155400040
公开日期	2014-07-08
内容类型	期刊论文
源URL	[http://ir.yic.ac.cn/handle/133337/6957]
专题	烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
作者单位	1.Chinese Acad Sci, Inst Soil Sci, Key Lab Soil Environm & Pollut Remediat, Nanjing 210008, Jiangsu, Peoples R China 2.Japan Atom Energy Agcy, Gunma 3701292, Japan 3.Natl Inst Agroenvironm Sci, Ibaraki 3058604, Japan 4.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Yantai 264003, Peoples R China 5.Agrifood & Biosci Inst, Agrienvironm Branch, Belfast BT9 5PX, Antrim, North Ireland
推荐引用方式 GB/T 7714	Hu, Pengjie,Yin, Yong-Gen,Ishikawa, Satoru,et al. Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbizincicola[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2013,20(9):6306-6316.
APA	Hu, Pengjie.,Yin, Yong-Gen.,Ishikawa, Satoru.,Suzui, Nobuo.,Kawachi, Naoki.,...&Wu, Longhua.(2013).Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbizincicola.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,20(9),6306-6316.
MLA	Hu, Pengjie,et al."Nitrate facilitates cadmium uptake, transport and accumulation in the hyperaccumulator Sedum plumbizincicola".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 20.9(2013):6306-6316.