Phytotoxicity of mercury in Indian mustard (Brassica juncea L.)

被引：65

作者：

Shiyab, Safwan ^{[1
]}

Chen, Jian ^{[1
]}

Han, Fengxiang X. ^{[1
,2
]}

Monts, David L. ^{[1
,3
]}

Matta, Frank B. ^{[2
]}

Gu, Mengmeng ^{[2
]}

Su, Yi ^{[1
,3
]}

机构：

[1] Mississippi State Univ, Inst Clean Energy Technol, Starkville, MS 39759 USA

[2] Mississippi State Univ, Dept Plant & Soil Sci, Mississippi State, MS 39762 USA

[3] Mississippi State Univ, Dept Phys & Astron, Mississippi State, MS 39762 USA

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2009年 / 72卷 / 02期

关键词：

Mercury; Brassica juncea L; Phytotoxicity; Scanning electron microscopy; Transmission electron microscopy; Light microscopy; INDUCED OXIDATIVE STRESS; METABOLIC ADAPTATIONS; THLASPI-CAERULESCENS; HEXAVALENT CHROMIUM; PTERIS-VITTATA; HEAVY-METALS; TRACE-METALS; ACCUMULATION; WATER; TOLERANCE;

D O I：

10.1016/j.ecoenv.2008.06.002

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

This study investigated the phytotoxicity of mercury to Indian mustard (Brassica juncea L.). Two common cultivars (Florida Broad Leaf and Long-standing) were grown hydroponically in a mercury-spiked solution. Mercury exhibited a significant phytotoxicity in these two cultivars of Indian mustard at elevated concentrations (>= 2 mg L-1). Mercury uptake induced a significant reduction in both biomass and leaf relative water content. Microscopy studies indicated that elevated mercury concentrations in plants significantly changed leaf cellular structure: thickly stained areas surrounding the vascular bundles; decreases in the number of palisade and spongy parenchyma cells; and reduced cell size and clotted depositions. The palisade chloroplasts exhibited decreases in their amounts and starch grains as well as a loss of spindle shape. However, due to high accumulation of mercury in plants, especially in the roots, Indian mustard might be a potential candidate plant for phytofiltration of contaminated water and phytostabilization of mercury-contaminated soils. (C) 2008 Elsevier Inc. All rights reserved.

引用

页码：619 / 625

页数：7

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