Cadmium and lead affect the status of mineral nutrients in alfalfa grown on a calcareous soil

doi:10.1080/00380768.2020.1747362

	Cadmium and lead affect the status of mineral nutrients in alfalfa grown on a calcareous soil
	He, Honghua 1,3; Wang, Xia 1,2; Wu, Miaomiao 3; Guo, Lei 3; Fan, Chenbin 3; Peng, Qi 1,2
刊名	SOIL SCIENCE AND PLANT NUTRITION
	2020-04-06
页码	9
关键词	Calcareous soil carboxylates mineral nutrition plant growth rhizosphere pH soil contamination
ISSN号	0038-0768
DOI	10.1080/00380768.2020.1747362
通讯作者	He, Honghua(honghuahe@ms.iswc.ac.cn)
英文摘要	Cadmium (Cd) and lead (Pb) are toxic trace elements which are not essential for plants but can be easily taken up by roots and accumulated in various organs, and cause irreversible damages to plants. A pot experiment was carried out to investigate the individual and combined effects of Cd (0, 10, 20 mg kg(-1)) and Pb (0, 500, 1000 mg kg(-1)) level in a calcareous soil on the status of mineral nutrients, including K, P, Ca, Mg, S, Fe, Mn, Cu, and Zn, in alfalfa (Medicago sativa L.) plants. Soil Pb level considerably (P <= 0.05) affected the concentrations of more elements in plants than soil Cd level did, and there were combined effects of soil Cd level and Pb level on the concentrations of some nutrients (Ca, Mg, and Cu) in plants. The effects of soil Cd level and Pb level on plant nutrient concentrations varied among plant parts. Cd and Pb contamination did not considerably affect the exudation of carboxylates in the rhizosphere. An increase in rhizosphere pH and exudation of significant amounts of carboxylates (especially oxalate) in the rhizosphere might contribute to the exclusion and detoxification of Cd and Pb. Neither shoot dry mass nor root dry mass was significantly influenced by soil Cd level, but both of them were considerably reduced (by up to 25% and 45% on average for shoot dry mass and root dry mass, respectively) by increasing soil Pb level. The interaction between soil Cd level and Pb level was significant for root dry mass, but not significant for shoot dry mass. The results indicate that alfalfa is tolerant to Cd and Pb stress, and it is promising to grow alfalfa for phytostabilization of Cd and Pb on calcareous soils contaminated with Cd and Pb.
资助项目	National Key Research and Development Plan of China[2017YFC0504504] ; National Natural Science Foundation of China[41301570] ; Light of West China Program of Chinese Academy of Sciences ; Fundamental Research Funds for Central Universities
WOS关键词	ARABIDOPSIS-THALIANA ; DEFICIENCY RESPONSES ; IRON HOMEOSTASIS ; BRASSICA-JUNCEA ; ACCUMULATION ; TOXICITY ; ZINC ; RHIZOSPHERE ; METABOLISM ; TOLERANCE
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Agriculture
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000524020700001
资助机构	National Key Research and Development Plan of China ; National Natural Science Foundation of China ; Light of West China Program of Chinese Academy of Sciences ; Fundamental Research Funds for Central Universities
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/133214]
专题	中国科学院地理科学与资源研究所
通讯作者	He, Honghua
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Northwest A&F Univ, Coll Nat Resources & Environm, State Key Lab Soil Eros & Dryland Farming Loess, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	He, Honghua,Wang, Xia,Wu, Miaomiao,et al. Cadmium and lead affect the status of mineral nutrients in alfalfa grown on a calcareous soil[J]. SOIL SCIENCE AND PLANT NUTRITION,2020:9.
APA	He, Honghua,Wang, Xia,Wu, Miaomiao,Guo, Lei,Fan, Chenbin,&Peng, Qi.(2020).Cadmium and lead affect the status of mineral nutrients in alfalfa grown on a calcareous soil.SOIL SCIENCE AND PLANT NUTRITION,9.
MLA	He, Honghua,et al."Cadmium and lead affect the status of mineral nutrients in alfalfa grown on a calcareous soil".SOIL SCIENCE AND PLANT NUTRITION (2020):9.