Cadmium accumulation in and tolerance of rice (Oryza sativa L.) varieties with different rates of radial oxygen loss

被引：108

作者：

Wang, M. Y. ^{[2
]}

Chen, A. K. ^{[3
]}

Wong, M. H. ^{[4
,5
]}

Qiu, R. L. ^{[1
]}

Cheng, H. ^{[2
]}

Ye, Z. H. ^{[2
]}

机构：

[1] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Guangdong, Peoples R China

[2] Sun Yat Sen Univ, Sch Life Sci, Guangzhou 510006, Guangdong, Peoples R China

[3] Guangdong Univ Educ, Dept Biol, Guangzhou 510303, Guangdong, Peoples R China

[4] Hong Kong Baptist Univ, Croucher Inst Environm Sci, Hong Kong, Hong Kong, Peoples R China

[5] Hong Kong Baptist Univ, Dept Biol, Hong Kong, Hong Kong, Peoples R China

来源：

ENVIRONMENTAL POLLUTION | 2011年 / 159卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Cadmium; Radial oxygen loss (ROL); Rice (Oryza sativa L); Tolerance; Uptake; HEAVY-METAL POLLUTION; THLASPI-CAERULESCENS; IRON PLAQUE; CD CONTENT; SOIL; CULTIVARS; PLANTS; ZINC; PHYTOEXTRACTION; REDUCTION;

D O I：

10.1016/j.envpol.2011.02.025

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Cadmium (Cd) uptake and tolerance were investigated among 20 rice cultivars based on a field experiment (1.2 mg Cd kg(-1) in soil) and a soil pot trial (control, 100 mg Cd kg(-1)), and rates of radial oxygen loss (ROL) were measured under a deoxygenated solution. Significant differences were found among the cultivars in: (1) brown rice Cd concentrations (0.11-0.29 mg kg(-1)) in a field soil, (2) grain Cd tolerance (34-113%) and concentrations (2.1-6.5 mg kg(-1)) in a pot trial, and (3) rates of ROL (15-31 mmol O-2 kg(-1) root d.w. h(-1)). Target hazard quotients were calculated for the field experiment to assess potential Cd risk. Significant negative relationships were found between rates of ROL and concentrations of Cd in brown rice or straw under field and greenhouse conditions, indicating that rice cultivars with higher rates of ROL had higher capacities for limiting the transfer of Cd to rice and straw. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：1730 / 1736

页数：7

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