Advances in phytoremediation.
Identifieur interne : 004736 ( Main/Exploration ); précédent : 004735; suivant : 004737Advances in phytoremediation.
Auteurs : A C Dietz [États-Unis] ; J L SchnoorSource :
- Environmental health perspectives [ 0091-6765 ] ; 2001.
Descripteurs français
- KwdFr :
- Absorption (MeSH), Composés chimiques organiques (MeSH), Déchets dangereux (MeSH), Développement des plantes (MeSH), Plantes (enzymologie), Polluants du sol (pharmacocinétique), Pollution de l'environnement (prévention et contrôle), Racines de plante (physiologie), Végétaux génétiquement modifiés (MeSH).
- MESH :
- enzymologie : Plantes.
- pharmacocinétique : Polluants du sol.
- physiologie : Racines de plante.
- prévention et contrôle : Pollution de l'environnement.
- Absorption, Composés chimiques organiques, Déchets dangereux, Développement des plantes, Végétaux génétiquement modifiés.
English descriptors
- KwdEn :
- MESH :
- chemical , pharmacokinetics : Soil Pollutants.
- chemical : Hazardous Waste, Organic Chemicals.
- enzymology : Plants.
- physiology : Plant Roots.
- prevention & control : Environmental Pollution.
- Absorption, Plant Development, Plants, Genetically Modified.
Abstract
Phytoremediation is the use of plants to remedy contaminated soils, sediments, and/or groundwater. Sorption and uptake are governed by physicochemical properties of the compounds, and moderately hydrophobic chemicals (logarithm octanol--water coefficients = 1.0--3.5) are most likely to be bioavailable to rooted, vascular plants. Some hydrophilic compounds, such as methyl-tert-butylether and 1,4-dioxane, may also be taken up by plants via hydrogen bonding with transpiration water. Organic chemicals that pass through membranes and are translocated to stem and leaf tissues may be converted (e.g., oxidized by cytochrome P450s), conjugated by glutathione or amino acids, and compartmentalized in plant tissues as bound residue. The relationship between metabolism of organic xenobiotics and toxicity to plant tissues is not well understood. A series of chlorinated ethenes is more toxic to hybrid poplar trees (Populus deltoides x nigra, DN-34) than are the corresponding chlorinated ethanes. Toxicity correlates best with the number of chlorine atoms in each homologous series. Transgenic plants have been engineered to rapidly detoxify and transform such xenobiotic chemicals. These could be used in phytoremediation applications if issues of cost and public acceptability are overcome.
DOI: 10.1289/ehp.01109s1163
PubMed: 11250813
PubMed Central: PMC1240550
Affiliations:
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Sorption and uptake are governed by physicochemical properties of the compounds, and moderately hydrophobic chemicals (logarithm octanol--water coefficients = 1.0--3.5) are most likely to be bioavailable to rooted, vascular plants. Some hydrophilic compounds, such as methyl-tert-butylether and 1,4-dioxane, may also be taken up by plants via hydrogen bonding with transpiration water. Organic chemicals that pass through membranes and are translocated to stem and leaf tissues may be converted (e.g., oxidized by cytochrome P450s), conjugated by glutathione or amino acids, and compartmentalized in plant tissues as bound residue. The relationship between metabolism of organic xenobiotics and toxicity to plant tissues is not well understood. A series of chlorinated ethenes is more toxic to hybrid poplar trees (Populus deltoides x nigra, DN-34) than are the corresponding chlorinated ethanes. Toxicity correlates best with the number of chlorine atoms in each homologous series. Transgenic plants have been engineered to rapidly detoxify and transform such xenobiotic chemicals. These could be used in phytoremediation applications if issues of cost and public acceptability are overcome.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">11250813</PMID><DateCompleted><Year>2001</Year><Month>09</Month><Day>20</Day></DateCompleted><DateRevised><Year>2018</Year><Month>11</Month><Day>13</Day></DateRevised><Article PubModel="Print"><Journal><ISSN IssnType="Print">0091-6765</ISSN><JournalIssue CitedMedium="Print"><Volume>109 Suppl 1</Volume><PubDate><Year>2001</Year><Month>Mar</Month></PubDate></JournalIssue><Title>Environmental health perspectives</Title><ISOAbbreviation>Environ Health Perspect</ISOAbbreviation></Journal><ArticleTitle>Advances in phytoremediation.</ArticleTitle><Pagination><MedlinePgn>163-8</MedlinePgn></Pagination><Abstract><AbstractText>Phytoremediation is the use of plants to remedy contaminated soils, sediments, and/or groundwater. Sorption and uptake are governed by physicochemical properties of the compounds, and moderately hydrophobic chemicals (logarithm octanol--water coefficients = 1.0--3.5) are most likely to be bioavailable to rooted, vascular plants. Some hydrophilic compounds, such as methyl-tert-butylether and 1,4-dioxane, may also be taken up by plants via hydrogen bonding with transpiration water. Organic chemicals that pass through membranes and are translocated to stem and leaf tissues may be converted (e.g., oxidized by cytochrome P450s), conjugated by glutathione or amino acids, and compartmentalized in plant tissues as bound residue. The relationship between metabolism of organic xenobiotics and toxicity to plant tissues is not well understood. A series of chlorinated ethenes is more toxic to hybrid poplar trees (Populus deltoides x nigra, DN-34) than are the corresponding chlorinated ethanes. Toxicity correlates best with the number of chlorine atoms in each homologous series. Transgenic plants have been engineered to rapidly detoxify and transform such xenobiotic chemicals. 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IdType="pubmed">7765998</ArticleId></ArticleIdList></Reference></ReferenceList></PubmedData></pubmed><affiliations><list><country><li>États-Unis</li></country><region><li>Iowa</li></region><settlement><li>Iowa City</li></settlement><orgName><li>Université de l'Iowa</li></orgName></list><tree><noCountry><name sortKey="Schnoor, J L" sort="Schnoor, J L" uniqKey="Schnoor J" first="J L" last="Schnoor">J L Schnoor</name></noCountry><country name="États-Unis"><region name="Iowa"><name sortKey="Dietz, A C" sort="Dietz, A C" uniqKey="Dietz A" first="A C" last="Dietz">A C Dietz</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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