Abstract
Vitamin E is thought to be involved in many essential processes in plants, but no functional proof has been reported. To study vitamin E deficiency in plants, a high-throughput biochemical screen for vitamin E quantification in Arabidopsis mutants has been developed, which has led to the identification of VTE1-encoding tocopherol cyclase. Interestingly, the corresponding maize mutation, sxd1, causes plasmodesmata malfunction, suggesting a link between tocopherol cyclase and plasmodesmata function.
MeSH terms
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Arabidopsis / enzymology
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Arabidopsis / genetics
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Arabidopsis / metabolism*
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Intramolecular Transferases / genetics
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Intramolecular Transferases / metabolism
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Mutation
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Plant Proteins / genetics
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Plant Proteins / metabolism
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Plant Structures / physiology
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Tocopherols / chemistry
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Tocopherols / metabolism*
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Vitamin E / biosynthesis*
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Vitamin E / chemistry
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Zea mays / genetics
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alpha-Tocopherol / chemistry
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alpha-Tocopherol / metabolism
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beta-Tocopherol / chemistry
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beta-Tocopherol / metabolism
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gamma-Tocopherol / chemistry
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gamma-Tocopherol / metabolism
Substances
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Plant Proteins
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Sxd1 protein, Zea mays
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Vitamin E
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gamma-Tocopherol
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beta-Tocopherol
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Intramolecular Transferases
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tocopherol cyclase
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alpha-Tocopherol
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Tocopherols