Source:http://linkedlifedata.com/resource/pubmed/id/16666726
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
1
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| pubmed:dateCreated |
2010-6-29
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| pubmed:abstractText |
Tomato plants (Lycopersicum esculentum Mill.) were grown for 21-days in a complete hydroponic nutrient solution including Fe(3+)-ethylenediamine-di(o-hydroxyphenylacetate) and subsequently switched to nutrient solution withholding Fe for 8 days to induce Fe stress. The roots of Fe-stressed plants reduced chelated Fe at rates sevenfold higher than roots of plants grown under Fe-sufficient conditions. The response in intact Fe-deficient roots was localized to root hairs, which developed on secondary roots during the period of Fe stress. Plasma membranes (PM) isolated by aqueous two-phase partitioning from tomato roots grown under Fe stress exhibited a 94% increase in rates of NADH-dependent Fe(3+)-citrate reduction compared to PM isolated from roots of Fe-sufficient plants. Optimal detection of the reductase activity required the presence of detergent indicating structural latency. In contrast, NADPH-dependent Fe(3+)-citrate reduction was not significantly different in root PM isolated from Fe-deficient versus Fe-sufficient plants and proceeded at substantially lower rates than NADH-dependent reduction. Mg(2+)-ATPase activity was increased 22% in PM from roots of Fe-deficient plants compared to PM isolated from roots of Fe-sufficient plants. The results localized the increase in Fe reductase activity in roots grown under Fe stress to the PM.
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| pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16658143,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16662934,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16663338,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16663575,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16663891,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16663976,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16664427,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16664912,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16665060,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-16665677,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-3158648,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-3893544,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-4155469,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-6746662,
http://linkedlifedata.com/resource/pubmed/commentcorrection/16666726-942051
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| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:status |
PubMed-not-MEDLINE
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| pubmed:month |
May
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| pubmed:issn |
0032-0889
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| pubmed:author | |
| pubmed:issnType |
Print
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| pubmed:volume |
90
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
151-6
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| pubmed:dateRevised |
2010-9-14
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| pubmed:year |
1989
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| pubmed:articleTitle |
Iron-Stress Induced Redox Activity in Tomato (Lycopersicum esculentum Mill.) Is Localized on the Plasma Membrane.
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| pubmed:affiliation |
Plant Photobiology Laboratory, Beltsville Agricultural Research Center, U.S. Department of Agriculture-Agricultural Research Service, Beltsville, Maryland 20705.
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| pubmed:publicationType |
Journal Article
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