Thiol peptides induction in the seagrass Thalassia testudinum (Banks ex Konig) in response to cadmium exposure

被引：18

作者：

Alvarez-Legorreta, Teresa ^{[1
]}

Mendoza-Cozatl, David ^{[2
]}

Moreno-Sanchez, Rafael ^{[2
]}

Gold-Bouchot, Gerardo ^{[1
]}

机构：

[1] CINVESTAV, IPN, Dept Recursos del Mar, Unidad Merida, Apdo Postal 73, Merida 97310, Mexico

[2] Inst Nacl Cardiol, Dept Bioquim, Mexico City 14080, DF, Mexico

来源：

AQUATIC TOXICOLOGY | 2008年 / 86卷 / 01期

关键词：

sea grass; cadmium; thiol peptides; Thalassia testudinum; phytochelatins;

D O I：

10.1016/j.aquatox.2007.09.001

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Trace metal accumulation and thiol compounds synthesis as induced by cadmium exposure was studied in the seagrass Thalassia testudinum. Shoots were exposed for 24, 48, 96 and 144 h to several CdCl2 concentrations (0, 30, 50 and 70 mu M). Levels of cadmium, cysteine, glutathione (GSH), gamma-glutamylcysteine (gamma-EC), and phytochelatin-like peptides were determined in green blades, live sheaths and root/rhizomes tissues. Metal accumulation was dependent on Cd concentration and type of tissue, with green blades showing the highest content followed by live sheaths and root/rhizomes. All tissues experienced an increase in thiol-containing compounds as a response to cadmium exposure. Live sheaths showed the highest levels of cysteine, GSH and gamma-EC. This is the first report of induction of thiol peptides, presumably phytochelatins, by a trace metal in a sea grass species. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：12 / 19

页数：8

共 34 条

[1] Occurrence of sulfated galactans in marine angiosperms: evolutionary implications
Aquino, RS
Landeira-Fernandez, AM
Valente, AP
Andrade, LR
Mourao, PAS
[J]. GLYCOBIOLOGY, 2005, 15 (01) : 11 - 20
[2] Baycu Gulriz, 2002, Journal of Cell and Molecular Biology, V1, P45
[3] An improved grafting technique for mature Arabidopsis plants demonstrates long-distance shoot-to-root transport of phytochelatins in Arabidopsis
Chen, A
Komives, EA
Schroeder, JI
[J]. PLANT PHYSIOLOGY, 2006, 141 (01) : 108 - 120
[4] Evolution and function of phytochelatin synthases
Clemens, S
[J]. JOURNAL OF PLANT PHYSIOLOGY, 2006, 163 (03) : 319 - 332
[5] Phytochelatins and metallothioneins: Roles in heavy metal detoxification and homeostasis
Cobbett, C
Goldsbrough, P
[J]. ANNUAL REVIEW OF PLANT BIOLOGY, 2002, 53 : 159 - 182
[6] ASSESSMENT OF TRACE-METAL TOXICITY USING MOLECULAR, PHYSIOLOGICAL AND BEHAVIORAL BIOMARKERS
DEPLEDGE, MH
AAGAARD, A
GYORKOS, P
[J]. MARINE POLLUTION BULLETIN, 1995, 31 (1-3) : 19 - 27
[7] Responses induced by high concentration of cadmium in Phragmites australis roots
Ederli, L
Reale, L
Ferranti, F
Pasqualini, S
[J]. PHYSIOLOGIA PLANTARUM, 2004, 121 (01) : 66 - 74
[8] Ferrat L, 2002, B MAR SCI, V71, P1183
[9] Assessment of the use of biomarkers in aquatic plants for the evaluation of environmental quality:: application to seagrasses
Ferrat, L
Pergent-Martini, C
Roméo, M
[J]. AQUATIC TOXICOLOGY, 2003, 65 (02) : 187 - 204
[10] Mercury and non-protein thiol compounds in the seagrass Posidonia oceanica
Ferrat, L
Gnassia-Barelli, M
Pergent-Martini, C
Roméo, M
[J]. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY C-TOXICOLOGY & PHARMACOLOGY, 2003, 134 (01): : 147 - 155

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