Characteristics of cadmium accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation

doi:10.1007/s10725-010-9451-3

	Characteristics of cadmium accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation
	Sun, Ruilian 3,4; Jin, Caixia 1,2; Zhou, Qixing 3,5
刊名	PLANT GROWTH REGULATION
	2010-05-01
卷号	61 期号:1 页码:67-74
关键词	Rorippa Globosa Rorippa Islandica Antioxidant Enzyme Cadmium Hyperaccumulation Metal Tolerance Phytochelatin
ISSN号	0167-6903
DOI	10.1007/s10725-010-9451-3
英文摘要	Characteristics of cadmium (Cd) accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation were further investigated and compared with a closely related species, Rorippa islandica. The results showed that there was no phytotoxicity for R. globosa leaves or reduction in biomass when treated with 25 mu g Cd g(-1), although the concentration of Cd accumulated in the leaves was up to 218.9 mu g Cd g(-1) dry weight (DW). On the contrary, Cd toxicity was observed in R. islandica leaves by way of determining changes in fresh weight (FW), malondialdehyde (MDA) level and chlorophyll content while treated with 25 mu g Cd g(-1) DW. R. globosa had stronger self-protection ability than R. islandica to adapt to oxidative stress caused by Cd. Application of Cd significantly increased the activity of superoxide dismutase (SOD) in leaves, the activity of peroxidase (POD) in roots, and the activity of catalase (CAT) in leaves and roots of R. globosa. By contrast, in R. islandica, the activity of antioxidant enzymes was inhibited or unchanged by various Cd treatments. However, R. globosa leaves had higher activity of antioxidant enzymes such as SOD and POD than that of R. islandica. The antioxidative defense systems in R. globosa might play an important role in Cd tolerance. The Cd treatments significantly induced the synthesis of phytochelatins (PCs) in the two species. Leaf PCs and Cd accumulation by R. globosa were much greater than those by R. islandica, but root PCs and Cd accumulation by R. islandica were much greater than those by R. globosa, suggesting that PCs in leaves may be a biomarker of Cd hyperaccumulation, and the synthesis of PCs may be related to an increase in the uptake of Cd ions into the cytoplasm, not the primary mechanism for Cd tolerance.
WOS研究方向	Plant Sciences
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000276184800008
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/121649]
专题	中国科学院沈阳应用生态研究所
通讯作者	Zhou, Qixing
作者单位	1.Henan Normal Univ, Henan Key Lab Environm Pollut Control, Key Lab Yellow River & HuaiHe River Water Environ, Minist Educ, Xinxiang 453007, Peoples R China 2.Henan Normal Univ, Coll Chem & Environm Sci, Xinxiang 453007, Peoples R China 3.Chinese Acad Sci, Key Lab Terr Ecol Proc, Inst Appl Ecol, Shenyang 110016, Peoples R China 4.Shandong Univ, Environm Res Inst, Jinan 250100, Peoples R China 5.Nankai Univ, Key Lab Pollut Proc & Environm Criteria, Coll Environm Sci & Engn, Tianjin 300071, Peoples R China
推荐引用方式 GB/T 7714	Sun, Ruilian,Jin, Caixia,Zhou, Qixing. Characteristics of cadmium accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation[J]. PLANT GROWTH REGULATION,2010,61(1):67-74.
APA	Sun, Ruilian,Jin, Caixia,&Zhou, Qixing.(2010).Characteristics of cadmium accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation.PLANT GROWTH REGULATION,61(1),67-74.
MLA	Sun, Ruilian,et al."Characteristics of cadmium accumulation and tolerance in Rorippa globosa (Turcz.) Thell., a species with some characteristics of cadmium hyperaccumulation".PLANT GROWTH REGULATION 61.1(2010):67-74.