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231224s2011 xx |||||o 00| ||eng c |
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|a 10.1093/jxb/err006
|2 doi
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|a pubmed24n0690.xml
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|a (DE-627)NLM206883293
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|a (NLM)21430290
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Singh, Rajesh K
|e verfasserin
|4 aut
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|a Activation of ethylene-responsive p-hydroxyphenylpyruvate dioxygenase leads to increased tocopherol levels during ripening in mango
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|c 2011
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
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|2 rdamedia
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|a ƒa Online-Ressource
|b cr
|2 rdacarrier
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|a Date Completed 27.10.2011
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|a Date Revised 20.10.2021
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|a published: Print-Electronic
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|a Citation Status MEDLINE
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|a Mango is characterized by high tocopherol and carotenoid content during ripening. From a cDNA screen of differentially expressing genes during mango ripening, a full-length p-hydroxyphenylpyruvate dioxygenase (MiHPPD) gene homologue was isolated that encodes a key enzyme in the biosynthesis of tocopherols. The gene encoded a 432-amino-acid protein. Transcript analysis during different stages of ripening revealed that the gene is ripening related and rapidly induced by ethylene. The increase in MiHPPD transcript accumulation was followed by an increase in tocopherol levels during ripening. The ripening-related increase in MiHPPD expression was also seen in response to abscisic acid and to alesser extent to indole-3-acetic acid. The expression of MiHPPD was not restricted to fruits but was also seen in other tissues such as leaves particularly during senescence. The strong ethylene induction of MiHPPD was also seen in young leaves indicating that ethylene induction of MiHPPD is tissue independent. Promoter analysis of MiHPPD gene in tomato discs and leaves of stable transgenic lines of Arabidopsis showed that the cis elements for ripening-related, ethylene-responsive, and senescence-related expression resided within the 1590 nt region upstream of the ATG codon. Functionality of the gene was demonstrated by the ability of the expressed protein in bacteria to convert p-hydroxyphenylpyruvate to homogentisate. These results provide the first evidence for HPPD expression during ripening of a climacteric fruit
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|a Journal Article
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|a Research Support, Non-U.S. Gov't
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|a Ethylenes
|2 NLM
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|a Indoleacetic Acids
|2 NLM
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|a Plant Proteins
|2 NLM
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|a indoleacetic acid
|2 NLM
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|a 6U1S09C61L
|2 NLM
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|a Abscisic Acid
|2 NLM
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|a 72S9A8J5GW
|2 NLM
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|a ethylene
|2 NLM
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|a 91GW059KN7
|2 NLM
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|a 4-Hydroxyphenylpyruvate Dioxygenase
|2 NLM
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|a EC 1.13.11.27
|2 NLM
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|a Tocopherols
|2 NLM
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| 650 |
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|a R0ZB2556P8
|2 NLM
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1 |
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|a Ali, Sharique A
|e verfasserin
|4 aut
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1 |
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|a Nath, Pravendra
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Sane, Vidhu A
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Journal of experimental botany
|d 1985
|g 62(2011), 10 vom: 23. Juni, Seite 3375-85
|w (DE-627)NLM098182706
|x 1460-2431
|7 nnns
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| 773 |
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|g volume:62
|g year:2011
|g number:10
|g day:23
|g month:06
|g pages:3375-85
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|u http://dx.doi.org/10.1093/jxb/err006
|3 Volltext
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