Adsorption of the Bacillus thuringiensis toxin (Cry1Ab) on Na‐montmorillonite and on the clay fractions of different soils
Identifieur interne : 001945 ( Main/Exploration ); précédent : 001944; suivant : 001946Adsorption of the Bacillus thuringiensis toxin (Cry1Ab) on Na‐montmorillonite and on the clay fractions of different soils
Auteurs : Sibylle Pagel-Wieder [Allemagne] ; Frank Gessler [Allemagne] ; Jürgen Niemeyer [Allemagne] ; Dietmar Schröder [Allemagne]Source :
- Journal of Plant Nutrition and Soil Science [ 1436-8730 ] ; 2004-04.
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Abstract
The adsorption of the toxin from Bacillus thuringiensis (Bt‐toxin), which is synthesized in genetically modified maize, on sterilized Na‐montmorillonite and on H2O2‐treated and untreated clay fractions of three soils from different sites were studied. All adsorption isotherms can be described by a linear isotherm. Although all clay fractions from the different soils show nearly the same mineralogical composition, we found different affinities ranging from k = 47.7 to k = 366.7 of the adsorbates for the Bt‐toxin. The H2O2‐treated clay fractions show no correlation between the adsorption affinity and the amount of soil organic matter. On the other hand, there is a correlation between the content of organic carbon and the adsorption affinity of the untreated clay fractions. This can be explained by the fact that due to the coatings of soil organic matter on aggregates, the Bt‐toxin polymers are not able to adsorb within the clay aggregates.
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DOI: 10.1002/jpln.200321312
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Pflanzenernähr. Bodenk.</title><idno type="ISSN">1436-8730</idno><idno type="eISSN">1522-2624</idno><imprint><publisher>WILEY‐VCH Verlag</publisher><pubPlace>Weinheim</pubPlace><date type="published" when="2004-04">2004-04</date><biblScope unit="volume">167</biblScope><biblScope unit="issue">2</biblScope><biblScope unit="page" from="184">184</biblScope><biblScope unit="page" to="188">188</biblScope></imprint><idno type="ISSN">1436-8730</idno></series><idno type="istex">D936C91ECC706813D4D0EF94B18128ECC584DDF4</idno><idno type="DOI">10.1002/jpln.200321312</idno><idno type="ArticleID">JPLN200321312</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">1436-8730</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Bacillus thuringiensis</term><term>Bt‐toxin</term><term>Cry1Ab</term><term>adsorption</term><term>clay fraction</term><term>montmorillonite</term><term>soil organic matter</term></keywords></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The adsorption of the toxin from Bacillus thuringiensis (Bt‐toxin), which is synthesized in genetically modified maize, on sterilized Na‐montmorillonite and on H2O2‐treated and untreated clay fractions of three soils from different sites were studied. All adsorption isotherms can be described by a linear isotherm. Although all clay fractions from the different soils show nearly the same mineralogical composition, we found different affinities ranging from k = 47.7 to k = 366.7 of the adsorbates for the Bt‐toxin. The H2O2‐treated clay fractions show no correlation between the adsorption affinity and the amount of soil organic matter. On the other hand, there is a correlation between the content of organic carbon and the adsorption affinity of the untreated clay fractions. This can be explained by the fact that due to the coatings of soil organic matter on aggregates, the Bt‐toxin polymers are not able to adsorb within the clay aggregates.</div></front></TEI><affiliations><list><country><li>Allemagne</li></country><region><li>Basse-Saxe</li><li>Rhénanie-Palatinat</li></region><settlement><li>Göttingen</li><li>Trèves (Allemagne)</li></settlement><orgName><li>Université de Trèves</li></orgName></list><tree><country name="Allemagne"><region name="Basse-Saxe"><name sortKey="Pagel Ieder, Sibylle" sort="Pagel Ieder, Sibylle" uniqKey="Pagel Ieder S" first="Sibylle" last="Pagel-Wieder">Sibylle Pagel-Wieder</name></region><name sortKey="Gessler, Frank" sort="Gessler, Frank" uniqKey="Gessler F" first="Frank" last="Gessler">Frank Gessler</name><name sortKey="Niemeyer, Jurgen" sort="Niemeyer, Jurgen" uniqKey="Niemeyer J" first="Jürgen" last="Niemeyer">Jürgen Niemeyer</name><name sortKey="Pagel Ieder, Sibylle" sort="Pagel Ieder, Sibylle" uniqKey="Pagel Ieder S" first="Sibylle" last="Pagel-Wieder">Sibylle Pagel-Wieder</name><name sortKey="Schroder, Dietmar" sort="Schroder, Dietmar" uniqKey="Schroder D" first="Dietmar" last="Schröder">Dietmar Schröder</name></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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