| Cadmium impairs mineral and carbohydrate mobilization during the germination of bean seeds. | |
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MedLine Citation:
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PMID: 20138361 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The germination rate, mineral (Ca, Fe, K, Mn) and carbohydrate (starch, soluble sugars, sucrose, glucose, fructose) contents and hydrolase activities in cotyledons and embryonic axes of bean seeds subjected to cadmium stress were investigated. Compared to the control, Cd caused a reduction in germination percent, embryo growth and in distribution of biomass, mineral and sugars between cotyledon and embryonic axis and inhibited the activities of alpha-amylase and invertases: soluble acid (INV-AS), soluble neutral (INV-NS), cell wall bound acid (INV-AW). Moreover, the solute leakage into the germination medium was also used as bioindicator parameter to evaluate the toxicity of cadmium accumulation, which increased in different tissues of germinating seeds in the duration of treatment and provoked nutrient loss and, thereby, electrical conductivity enhancement in the imbibition medium. This was correlated with an impairment of membrane integrity, as evidenced by high malondialdehyde (MDA) content and lipoxygenase (LOX) activity in Cd-poisoned embryo. The contribution of solute loss at the expense of growing embryonic axis to failure in reserve mobilization after Cd exposure is emphasized in association with the delay in seed germination. |
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Authors:
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Amira Sfaxi-Bousbih; Abdelilah Chaoui; Ezzedine El Ferjani |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-02-06 |
Journal Detail:
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Title: Ecotoxicology and environmental safety Volume: 73 ISSN: 1090-2414 ISO Abbreviation: Ecotoxicol. Environ. Saf. Publication Date: 2010 Sep |
Date Detail:
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Created Date: 2010-09-06 Completed Date: 2010-12-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7805381 Medline TA: Ecotoxicol Environ Saf Country: United States |
Other Details:
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Languages: eng Pagination: 1123-9 Citation Subset: IM |
Copyright Information:
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Copyright (c) 2010 Elsevier Inc. All rights reserved. |
Affiliation:
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Bio-Physiologie Cellulaires, Département des Sciences de la vie, Faculté des Sciences de Bizerte, 7021 Zarzouna, Tunisia. sfaxiamira@yahoo.fr |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Biomass Cadmium / toxicity* Carbohydrate Metabolism / drug effects* Cotyledon / drug effects, growth & development, metabolism Germination / drug effects* Lipid Peroxides / metabolism Minerals / metabolism* Phaseolus / drug effects*, growth & development, metabolism Plant Proteins / metabolism Seeds / drug effects*, growth & development, metabolism Soil Pollutants / toxicity* |
| Chemical | |
Reg. No./Substance:
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0/Lipid Peroxides; 0/Minerals; 0/Plant Proteins; 0/Soil Pollutants; 7440-43-9/Cadmium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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