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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
24
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pubmed:dateCreated |
2002-12-17
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pubmed:abstractText |
The molecular mechanisms underlying the onset of Fe-deficiency chlorosis and the maintenance of photosynthetic function in chlorotic chloroplasts are relevant to global photosynthetic productivity. We describe a series of graded responses of the photosynthetic apparatus to Fe-deficiency, including a novel response that occurs prior to the onset of chlorosis, namely the disconnection of the LHCI antenna from photosystem I (PSI). We propose that disconnection is mediated by a change in the physical properties of PSI-K in PSI in response to a change in plastid Fe content, which is sensed through the occupancy, and hence activity, of the Fe-containing active site in Crd1. We show further that progression of the response involves remodeling of the antenna complexes-specific degradation of existing proteins coupled to the synthesis of new ones, and establishment of a new steady state with decreased stoichiometry of electron transfer complexes. We suggest that these responses are typical of a dynamic photosynthetic apparatus where photosynthetic function is optimized and photooxidative damage is minimized in graduated responses to a combination of nutrients, light quantity and quality.
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pubmed:grant |
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pubmed:commentsCorrections |
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10187837,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10318870,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10521495,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-1056023,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10667783,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10681576,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10811605,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-10818090,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11418848,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11507643,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11507644,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11594057,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11790744,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11849598,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-11910013,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-12119027,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-12455693,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-1464588,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-2349216,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-2449095,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-2693938,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-3141374,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-3279047,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-3552671,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-6707079,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-7588626,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-7635162,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-8022940,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-8712361,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-8819335,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-9174349,
http://linkedlifedata.com/resource/pubmed/commentcorrection/12485992-9750208
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Chlorine,
http://linkedlifedata.com/resource/pubmed/chemical/Chlorophyll,
http://linkedlifedata.com/resource/pubmed/chemical/Iron,
http://linkedlifedata.com/resource/pubmed/chemical/Light-Harvesting Protein Complexes,
http://linkedlifedata.com/resource/pubmed/chemical/Peptides,
http://linkedlifedata.com/resource/pubmed/chemical/Photosystem I Protein Complex,
http://linkedlifedata.com/resource/pubmed/chemical/Plant Proteins,
http://linkedlifedata.com/resource/pubmed/chemical/Proteome,
http://linkedlifedata.com/resource/pubmed/chemical/PsaK protein, barley,
http://linkedlifedata.com/resource/pubmed/chemical/RNA
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pubmed:status |
MEDLINE
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pubmed:month |
Dec
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pubmed:issn |
0261-4189
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pubmed:author |
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pubmed:issnType |
Print
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pubmed:day |
16
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pubmed:volume |
21
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
6709-20
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pubmed:dateRevised |
2010-9-14
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pubmed:meshHeading |
pubmed-meshheading:12485992-Animals,
pubmed-meshheading:12485992-Chlamydomonas reinhardtii,
pubmed-meshheading:12485992-Chlorine,
pubmed-meshheading:12485992-Chlorophyll,
pubmed-meshheading:12485992-Dose-Response Relationship, Drug,
pubmed-meshheading:12485992-Electrophoresis, Gel, Two-Dimensional,
pubmed-meshheading:12485992-Gene Expression Regulation,
pubmed-meshheading:12485992-Immunoblotting,
pubmed-meshheading:12485992-Iron,
pubmed-meshheading:12485992-Light-Harvesting Protein Complexes,
pubmed-meshheading:12485992-Mass Spectrometry,
pubmed-meshheading:12485992-Peptides,
pubmed-meshheading:12485992-Photosynthesis,
pubmed-meshheading:12485992-Photosystem I Protein Complex,
pubmed-meshheading:12485992-Plant Proteins,
pubmed-meshheading:12485992-Plastids,
pubmed-meshheading:12485992-Proteome,
pubmed-meshheading:12485992-RNA,
pubmed-meshheading:12485992-Spectrometry, Fluorescence,
pubmed-meshheading:12485992-Time Factors
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pubmed:year |
2002
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pubmed:articleTitle |
Adaptation to Fe-deficiency requires remodeling of the photosynthetic apparatus.
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pubmed:affiliation |
Department of Chemistry and Biochemistry, UCLA, 607 Charles E. Young Drive East, Los Angeles, CA 90095-1569, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
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