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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
13
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pubmed:dateCreated |
2008-10-6
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pubmed:abstractText |
The tomato (Solanum lycopersicum) sulfurea mutation displays trans-inactivation of wild-type alleles in heterozygous plants, a phenomenon referred to as paramutation. Homozygous mutant plants and paramutated leaf tissue of heterozygous plants show a pigment-deficient phenotype. The molecular basis of this phenotype and the function of the SULFUREA gene (SULF) are unknown. Here, a comprehensive physiological analysis of the sulfurea mutant is reported which suggests a molecular function for the SULFUREA locus. It is found that the sulf mutant is auxin-deficient and that the pigment-deficient phenotype is likely to represent only a secondary consequence of the auxin deficiency. This is most strongly supported by the isolation of a suppressor mutant which shows an auxin overaccumulation phenotype and contains elevated levels of indole-3-acetic acid (IAA). Several lines of evidence point to a role of the SULF gene in tryptophan-independent auxin biosynthesis, a pathway whose biochemistry and enzymology is still completely unknown. Thus, the sulfurea mutant may provide a promising entry point into elucidating the tryptophan-independent pathway of IAA synthesis.
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pubmed:commentsCorrections |
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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 |
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pubmed:status |
MEDLINE
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pubmed:issn |
1460-2431
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pubmed:author |
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pubmed:issnType |
Electronic
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pubmed:volume |
59
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
3635-47
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pubmed:dateRevised |
2010-9-22
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pubmed:meshHeading |
pubmed-meshheading:18757490-Gene Expression Regulation, Plant,
pubmed-meshheading:18757490-Indoleacetic Acids,
pubmed-meshheading:18757490-Lycopersicon esculentum,
pubmed-meshheading:18757490-Mutation,
pubmed-meshheading:18757490-Phenotype,
pubmed-meshheading:18757490-Photosynthetic Reaction Center Complex Proteins,
pubmed-meshheading:18757490-Pigments, Biological,
pubmed-meshheading:18757490-Plant Growth Regulators,
pubmed-meshheading:18757490-Plant Proteins,
pubmed-meshheading:18757490-Suppression, Genetic,
pubmed-meshheading:18757490-Tryptophan
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pubmed:year |
2008
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pubmed:articleTitle |
The paramutated SULFUREA locus of tomato is involved in auxin biosynthesis.
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pubmed:affiliation |
Max-Planck-Institut für Molekulare Pflanzenphysiologie, Am Mühlenberg 1, D-14476 Potsdam-Golm, Germany.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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